WO2007119625A1 - ポリオレフィン系樹脂発泡体とその製造方法 - Google Patents
ポリオレフィン系樹脂発泡体とその製造方法 Download PDFInfo
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- WO2007119625A1 WO2007119625A1 PCT/JP2007/057251 JP2007057251W WO2007119625A1 WO 2007119625 A1 WO2007119625 A1 WO 2007119625A1 JP 2007057251 W JP2007057251 W JP 2007057251W WO 2007119625 A1 WO2007119625 A1 WO 2007119625A1
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- polyolefin resin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/22—After-treatment of expandable particles; Forming foamed products
- C08J9/228—Forming foamed products
- C08J9/232—Forming foamed products by sintering expandable particles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/08—Supercritical fluid
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2421/00—Characterised by the use of unspecified rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Ethylene-propylene or ethylene-propylene-diene copolymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
Definitions
- the present invention relates to a polyolefin resin foam excellent in flexibility, cushioning properties and processability, and a method for producing the same.
- Internal insulators such as electronic devices and information devices, cushioning materials, dustproof materials, sound insulation materials, heat insulating materials, or food packaging materials, clothing materials, building materials, automobiles and home appliances, etc.
- Foam foam molded product
- Such foams are required to have characteristics such as flexibility, cushioning properties, and heat insulation properties from the viewpoint of ensuring sealing properties when assembled as parts.
- Polyolefin resin foams such as polyethylene and polypropylene are known as foam materials. These foams have a problem that they are sufficient in terms of softness and cushioning properties. . In an attempt to solve such problems, it has been attempted to increase the expansion ratio or to soften the material itself by blending a rubber component or the like with polyolefin resin.
- Japanese Patent Application Laid-Open No. 2004-250529 discloses a melt containing a polyolefin resin, rubber, a Z or thermoplastic olefin-based polymer component, and powder particles.
- a polyolefin resin foam obtained by foam molding a composition for polyolefin resin foam having a tension of 20 cN or more is disclosed.
- there is still room for improvement in terms of flexibility, cushioning properties, and cutting processability of the obtained foam is still room for improvement in terms of flexibility, cushioning properties, and cutting processability of the obtained foam.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-250529
- An object of the present invention is to provide a polyolefin resin foam having excellent flexibility and cushioning properties, and good cachetability, particularly excellent cutting workability, and a method for producing the same. .
- the present inventors have obtained a dynamic heat treatment of a mixture containing rubber and ex-olefin thermoplastic resin having specific physical properties in the presence of a crosslinking agent.
- Foaming a polyolefin resin composition containing at least a thermoplastic elastomer composition, a polyolefin resin, and a nucleating agent having a specific particle size under specific conditions provides excellent flexibility and cushioning, as well as punching.
- the present invention was completed by finding that a foam having an excellent shape recoverability at the time of processing can be obtained because the bubbles at the punched site are not easily crushed during the processing.
- the present invention provides:
- thermoplastic elastomer composition obtained by dynamic heat treatment in the presence of a crosslinking agent
- a polyolefin resin composition containing at least a nucleating agent having an average particle size of 0.1 ⁇ m or more and less than 2.0 ⁇ m is foamed with supercritical diacid-carbon.
- a polyolefin resin foam is provided.
- the density of the polyolefin resin foam is, for example, 0.2 gZcm 3 or less.
- the rubber (A) butadiene rubber, styrene-butadiene rubber, ethylene 'a Orefuin copolymer rubber, butyl rubber, isoprene rubber, acrylonitrile rubber, and at least one member selected from the group also chloroprene rubber suck be used.
- the polyolefin series As the resin (2) a resin having a melt tension of 3. OcN or higher at 210 ° C, take-off speed 2. OmZmin can be used.
- the polyolefin foamed resin foam further comprises (4) at least one aliphatic compound selected from fatty acids, fatty acid amides, and fatty acid metal stones. It may be a polyolefin resin foam obtained by foaming the polyolefin resin composition to be contained with supercritical carbon dioxide or carbon dioxide.
- the content of the aliphatic compound (4) is, for example, 1 to 5 parts by mass with respect to 100 parts by mass of the total amount of the component (1) and the component (2).
- Examples of the aliphatic compound (4) include fatty acids and fatty acid amides.
- the fatty acid amide includes ER acid amide.
- the present invention also provides
- thermoplastic elastomer composition obtained by dynamic heat treatment in the presence of a crosslinking agent
- a compound having a polar functional group and a melting point of 50 to 150 ° C in addition to components (1) to (3), (4) a compound having a polar functional group and a melting point of 50 to 150 ° C.
- a polyolefin resin composition containing at least one aliphatic compound selected from fatty acids, fatty acid amides, and fatty acid metal stones may be foamed with superacid diacid carbon.
- the polyolefin resin foam of the present invention is excellent in flexibility and cushioning properties, and in addition, it is excellent in heat resistance. In particular, even if the expansion ratio is high, it has excellent shape recoverability that makes it difficult for the bubbles at the punched portion to collapse during punching. For this reason, the processing width can be made extremely narrow, and the thickness selection range can be widened.
- FIG. 1 is a digital microscope photograph showing the state of a foam after punching when the evaluation is “ ⁇ ” in an evaluation test of cutting workability of an example.
- FIG. 2 is a digital microscope photograph showing the state of the foam after punching when the evaluation is “X” in the evaluation test of the cutting workability of the example.
- the polyolefin resin foam of the present invention is a thermoplastic elastomer composition.
- a polyolefin resin composition comprising at least a product (1), a polyolefin resin (2), and a nucleating agent (3) having an average particle size of 0.1 ⁇ m or more and less than 2.0 ⁇ m Is bubbled with supercritical carbon dioxide.
- Thermoplastic elastomer composition (1) consists of (A) rubber, (B) 210 ° C, take-off speed 2. Om / min melt tension less than 3. OcN (B-1) ⁇ -olefin It is obtained by dynamically heat-treating a mixture containing crystalline thermoplastic resin and ⁇ or ( ⁇ - 2) a one-year-old refin amorphous thermoplastic resin in the presence of (C) a crosslinking agent. It is a composition.
- component (A) As the rubber (A) (hereinafter also referred to as “component (A)”), various generally known rubbers can be used. Specific examples of component (A) include conjugated rubbers such as butadiene rubber (BR) and isoprene rubber (IR), styrene-butadiene rubber (SBR), ethylene'a-olefin copolymer rubber, butyl rubber (IIR) , Acrylonitrile rubber
- NBR chloroprene rubber
- CR chloroprene rubber
- Conjugated rubber is composed of the following compounds (a) to (d) as main components: It is preferable to be obtained by polymerization using a catalyst.
- the synergistic gen compound is preferably 1,3 butadiene or isoprene.
- the 1,4 cis bond content of the conjugated gen-based rubber is 90% or more, and the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) measured by gel permeation chromatography ( MwZM n) is preferably 3.5 or less.
- Ri to R 2 are the same or different and are a hydrocarbon group or hydrogen atom having 1 to 10 carbon atoms, and R 3 is a carbon atom having 1 to 10 carbon atoms. And R 3 may be the same as or different from R 1 or R 2 ).
- the component (a) is a rare earth element-containing compound corresponding to atomic numbers 57 to 71 in the periodic table or a compound capable of obtaining a reaction force between these compounds and a Lewis base.
- the rare earth element is neodymium, praseodymium, cerium, lanthanum or gadolinium, more preferably neodymium. Two or more rare earth elements may be used.
- the rare earth element-containing compound is preferably a carboxylate, an alkoxide, a ⁇ -diketone complex, a phosphate, or a phosphite, but a carboxylate or phosphate is more preferred.
- the phosphate is particularly preferred.
- the rare earth element carboxylate is represented by, for example, the general formula (R 23 — CO 2) M (wherein M is
- R 23 is a hydrocarbon group having 1 to 20 carbon atoms (preferably saturated or unsaturated, linear, branched or cyclic).
- the carboxyl group is bonded to a primary, secondary, or tertiary carbon atom.
- salts of 2-ethylhexanoic acid, naphthenic acid, and versatic acid are preferable.
- the rare earth element alkoxide has, for example, a general formula (R 24 0) M (wherein M is a period)
- R 24 is a rare earth element corresponding to atomic number 57 to 71 in the table, and R 24 is a hydrocarbon group having 1 to 20 carbon atoms (preferably saturated or unsaturated, linear, branched or cyclic), Alkoxy groups are attached to primary, secondary, or tertiary carbon atoms.
- alkoxy groups are Ru represented by "R 24 0" is hexyl alkoxy group into 2-Echiru, Oreiruarukoki sheet group, stearyl alkoxy group, phenoxy group, a benzyl alkoxy group. Of these, 2-ethyl-hexylalkoxy and benzylalkoxy are preferred.
- Examples of the ⁇ -diketone complex of rare earth elements include rare earth elements such as acetylacetone, benzylacetone, propiolacetone, valerylacetone, ethylacetylacetone complex, and the like. Of these, acetylacetone complex and ethylacetylaceton complex are preferable.
- rare earth element phosphates or phosphites rare earth elements such as bis (2-ethylhexyl) phosphate, bis (1-methylheptyl) phosphate, bis ( ⁇ -norphene phosphate).
- bis (2-ethylhexyl phosphate), bis (1-methylheptyl) phosphate 2-ethylhexylphosphonate mono-2-ethylhexyl, and bis (2-ethylhexyl) phosphinic acid Salts are preferred.
- neodymium phosphate or neodymium carboxylate is particularly preferred, and neodymium 2-ethylhexanoate, neodymium versatate, and the like are most preferred. Good.
- the Lewis base used for easily solubilizing the rare earth element-containing compound in a solvent is preferably 0 to 30 moles, more preferably, per mole of the rare earth element-containing compound. Used in a proportion of 1 to 10 mol.
- the Lewis base is also used as a mixture with a rare earth element-containing compound.
- Examples of Lewis bases include acetylethylacetone, tetrahydrofuran, pyridine, N, N-dimethylformamide, thiophene, diphenyl ether, triethylamine, organophosphorus compounds, monovalent or divalent alcohols. I can do it.
- the above component (a) can be used alone or in combination of two or more.
- the component (b) is a compound having a structure represented by the following formula (1) or (2). Also, in Fine Chemicals, 23, (9), 5 (1994), J. Am. Chem. Soc., 115, 4971 (1993), J. Am. Chem. Soc., 117, 6465 (1995) It is a disclosed alumoxane aggregate.
- n is an integer of 2 or more.
- R 25 include methyl, ethyl, propyl, butyl, isobutyl, t-butyl, hexyl, isohexyl, octyl, and isooctyl groups.
- a methyl group is more preferred, which is preferably a methyl, ethyl, isobutyl, or t-butyl group.
- N is an integer of 2 or more, preferably 4 to: LOO.
- component (b) examples include methylalumoxane, ethylalumoxane, n-propylalumoxane, n-butylalumoxane, isobutylalumoxane, t-butylalumoxane, hexylalumoxane, isohexylalumoxane and the like. Can be mentioned.
- the component (b) may be produced using any known technique. For example, trialkylaluminum or dialalkylaluminum monochloride is added to an organic solvent such as benzene, toluene, xylene, and water, water vapor, nitrogen gas containing water vapor, or copper sulfate pentahydrate or aluminum sulfate 16 It can be produced by adding a salt containing water of crystallization, such as a water salt, to react.
- a salt containing water of crystallization such as a water salt
- Examples of the component (c) include trimethylaluminum, triethylaluminum, tri-n-propylaluminum, triisopropylaluminum, tri-n-butylaluminum, triisobutylaluminum, tri-tbutylaluminum, tripentylaluminum, trihexylaluminum.
- triethyl aluminum, triisobutyl aluminum, decyl aluminum hydride, and disobutyl aluminum hydride are preferable.
- Component (c) can be used alone or in combination of two or more.
- Component (d) is a halogenated key compound and a Z or halogenated organic compound.
- halogen key chain compound examples include tetrasalt key, key tetrabromide, key tetraiodide, and hexachlorodisilane.
- examples of the halogenated organosilicon compound include triphenylchlorosilane, trihexylchlorosilane, trioctylchlorosilane, tributylchlorosilane, triethylchlorosilane, trimethylchlorosilane, methylchlorosilane, trimethylbromosilane, diphenyldichlorosilane, Dihexyldichlorosilane, dioctyldichlorosilane, dibutyldichlorosilane, jetyldichlorosilane, dimethyldichlorosilane, methyldichlorosilane, phenyltricyclosilane, hexyltrichlorosilane, octyltrichlorosilane, butyltrichlorosilane, methyltrichlorosilane , Ettiltrichlorosi
- tetrasalt silicate triethylchlorosilane, trimethylchlorosilane, dimethyldichlorosilane, dimethyldichlorosilane, methyldichlorosilane, ethyl chlorosilane More preferred is tetrasalt silicate, which is preferably silane, methyltrichlorosilane, trichlorosilane, dichlorotetramethyldisilane, or dichlorotetramethyldisiloxane.
- the above component (d) can be used alone or in combination of two or more.
- the component (a) is preferably used in an amount of 0.0001 to 1.0 millimoles for the lOOg conjugated diene compound, preferably 0.005 to 0.5 millimonore! ! / If it is less than 0.001 mm, the polymerization activity tends to be low. On the other hand, if it exceeds 1.0 mmol, the catalyst concentration tends to be high and a deashing process tends to be required.
- component (b) used can be expressed as the molar ratio of A1 to component (a).
- Component (b) has a molar ratio of 1: 1 to 1: 500, preferably S, preferably 1: 3 to 1: 250, more preferably 1: 5 to 1: 100. Particularly preferred.
- the component (a): component (c) is preferably in a molar ratio of 1: 1 to 1: 300, more preferably 1: 3 to 1: 150.
- Component (a): Component (d) is preferably in a molar ratio of 1: 0.1 to 1:30, more preferably 1: 0.2 to 1:15.
- the polymerization reaction may be carried out in the presence of hydrogen gas for the purpose of adjusting the molecular weight of the polymer.
- a conjugated gen compound and Z or a non-conjugated gen compound may be added in an amount of 0 to 50 mol per mol of the component (a). May be used in proportion.
- this conjugation compound 1,3-butadiene, isoprene, etc., which are the same as the monomers for polymerization, can be used.
- examples of the non-conjugated gen-based compound include dibutene benzene, diisopropene benzene, triisopropene benzene, 1,4-buluhexagen, ethylidene norbornene, and the like.
- the catalyst can be produced, for example, by reacting the components (a) to (d) dissolved in a solvent and, if necessary, a conjugated-gen compound and Z or a non-conjugated-gen compound. .
- the addition order of each component may be arbitrary.
- Each component is mixed and reacted in advance.
- aging is preferable in terms of improving the polymerization activity and shortening the polymerization initiation induction period.
- the aging temperature is preferably from 0 to 100 ° C., more preferably from 20 to 80 ° C. When the temperature is less than 0 ° C, aging does not occur sufficiently.
- the aging time is not particularly limited, and it can be contacted in the line before being added to the polymerization reactor. Aging time of 0.5 minutes or more is sufficient, and it is stable for several days.
- Conjugated compounds that can be polymerized using a catalyst having components (a) to (d) as main components include 1,3 butadiene, 2-methyl 1,3 butadiene (isoprene), 2, 3 Examples include dimethylolene 1,3 butadiene, 1,3 pentagen, 1,3 hexagen, and minolecene. Of these, 1,3 butadiene, isoprene and 1,3 pentagen are preferred, and 1,3 butadiene is more preferred.
- These conjugation compounds can be used singly or in combination of two or more.
- the conjugated diene rubber can be produced by performing a polymerization reaction using a solvent or in the absence of a solvent.
- An inert organic solvent can be used as the polymerization solvent.
- organic solvents include saturated aliphatic hydrocarbons having 4 to 10 carbon atoms such as butane, pentane, hexane, and heptane; saturated alicyclics having 6 to 20 carbon atoms such as cyclopentane and cyclohexane.
- Hydrocarbons Monoolefins such as 1-butene and 2-butene; Aromatic hydrocarbons such as benzene, toluene, xylene; Methylene chloride, chloroform, carbon tetrachloride, trichloroethylene, norchloroethylene, 1, Examples thereof include halogenated hydrocarbons such as 2-dichloroneethane, chronolebenzene, bromobenzene, and chlorotoluene.
- the polymerization temperature is usually 30 ° C to + 200 ° C, preferably 0 to + 150 ° C.
- the polymerization reaction may be batch or continuous.
- the monomer concentration in this solvent is usually 5 to 50% by mass, preferably 7 to 35% by mass.
- a deactivating compound such as oxygen, water, or carbon dioxide gas in the polymerization system. It is preferable.
- a conjugated gen rubber having a high 1,4 cis bond content and a sharp molecular weight distribution can be obtained.
- Main components (a) to (d) The 1,4-cis bond content of the conjugated gen rubber obtained using the catalyst is usually 90% or more, preferably 92% or more.
- the 1,2-vinyl bond content of the conjugated gen rubber is usually 2.5% or less, preferably 2.0% or less. Outside these ranges, mechanical properties and rubber elasticity tend to decrease.
- the microstructure such as the 1,4-cis bond content of the conjugated gen rubber can be easily adjusted by controlling the catalyst composition ratio and the polymerization temperature.
- the MwZMn which is the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the conjugated gen rubber, is preferably 3.5 or less, more preferably 3.3 or less. If it exceeds 3.5, the rubber elasticity tends to decrease. MwZMn can be easily adjusted by controlling the molar ratio of the components (a) to (d). Mu-one viscosity of conjugation rubber (ML, 100
- C) is preferably 10 to 100, more preferably 15 to 90. If it is less than 10, the mechanical properties and rubber elasticity of the thermoplastic elastomer composition tend to be lowered. On the other hand, if it exceeds 100, the workability during dynamic crosslinking tends to be reduced.
- the molecular weight of the conjugation rubber can be varied over a wide range.
- the weight average molecular weight (Mw) in terms of polystyrene by GPC of the conjugated diene rubber is usually 50,000 to 1,500,000, preferably 100,000 to 1,000,000. If it is less than 50,000, the mechanical properties and rubber elasticity of the thermoplastic elastomer composition tend to be lowered. On the other hand, if it exceeds 1.5 million, the workability during dynamic cross-linking tends to decrease.
- a polymerization terminator and a polymer stabilizer are added to the polymerization reaction system as necessary, and a drying operation is performed while using a known solvent removal in the production of the conjugate polymer.
- the target conjugated diene rubber can be recovered from the polymerization reaction system.
- a conjugation compound is polymerized using the catalyst, and subsequently, an active terminal of the obtained polymer is reacted with at least one compound selected from the group of the following components (e) to (k): (Hereinafter also referred to as “denaturation”).
- a polymer having an increased molecular weight or branched molecular chains can be obtained. This modification improves mechanical properties and rubber elasticity.
- R 4 M (one R 5 COOR 6 ), or R 4 M, (one R 5 nn 4-nn
- COR 6 halogenated organometallic compounds, halogenated metal compounds, or Organic metal compound (provided that R 4 and R 5 are the same or different, a hydrocarbon group having 1 to 20 carbon atoms, R 6 may contain a carbonyl group or an ester group in the side chain, and have 1 to 20 carbon atoms.
- Hydrocarbon group, M is a tin atom, a key atom, a germanium atom, or a phosphorus atom, X is a halogen atom, and n is an integer of 0 to 3.
- Component (g) a hetero three-membered ring compound containing a bond represented by the following general formula (3) in the molecule (where Y 'is an oxygen atom, nitrogen An atom, or a Yio atom).
- Component (h) a halogenated isocyano compound.
- Metal salt of carboxylic acid corresponding to formula (5) (wherein R16 to R22 are the same or different, a hydrocarbon group having 1 to 20 carbon atoms, M "is a tin atom, a silicon atom, or a germanium atom, 1 is 0 ⁇ Is an integer of 3).
- Component (k) a compound having an alkoxysilyl group.
- M is a tin atom
- triphenyltin chloride tributyltin chloride, triisopropyltin chloride, trihexyltin chloride, trioctyl Chinolez chloride, dipheninoles dichloride, dibutinoles dichloride, dihexinoles dichloride, dioctinoles dichloride, pheninoles dichloride, butinoles ditrichloride,
- M ' is a silicon atom
- Examples include dihexyldichlorosilane, dichlorodichlorosilane, dibutyldichlorosilane, dimethyldichlorosilane, phenyl trichlorosilane, silane, hexyltrichlorosilane, octyltrichlorosilane, butyltrichlorosilane, methyltrichlorosilane, and tetrasalt be able to.
- M ' is a germanium atom
- M ′ is a phosphorus atom
- examples of the case where M ′ is a phosphorus atom include phosphorus trichloride.
- a compound in which Y is a carbon atom and Z is an oxygen atom is a ketene compound
- a compound in which Y is a carbon atom and Z is a thioketene compound is a thioketene compound.
- a compound in which Y is a nitrogen atom and Z is an oxygen atom is an isocyanate compound
- a compound in which Y is a nitrogen atom and Z is a thio atom is a thioisocyanate compound.
- compounds with Y and Z atoms, both of which are nitrogen atoms are carpositimide compounds
- compounds with Y and Z, which are also oxygen atoms are diacid-carbon
- Y is an oxygen atom
- Z is A compound that is a thio atom is sulfur carbonyl
- a compound in which Y and Z are both thio atoms is disulfur oxycarbon.
- the component (f) is not limited to these examples.
- Examples of the ketene compound include ethyl ketene, butyl ketene, phenol ketene, and toluyl ketene.
- Examples of the thioketene compound include ethylene thioketene, butyl thioketene, phenyl thioketene, toluyl thioketene, and the like.
- Examples of isocyanate compounds include phenol isocyanate, 2, 4-tolylene diisocyanate, 2, 6-tolylene diisocyanate, diphenylmethane diisocyanate, polymeric type diphenols. Noremethane diisocyanate, hexamethylene diisocyanate Can be listed.
- Examples of thioisocyanate toy compounds include phenolthio isocyanate, 2,4 tolylene diisocyanate, hexamethylene dithioisocyanate, and the like.
- Examples of carbodiimide compounds include N, N′-diphenylcarbodiimide, N, N, monoethylcarbodiimide and the like.
- a compound in which Y 'is an oxygen atom is an epoxy compound
- a compound in which Y' is a nitrogen atom is an ethyleneimine derivative
- a compound in which Y 'force is a S atom is a yilan compound.
- the epoxy compound include ethylene oxide, propylene oxide, cyclohexene oxide, styrene oxide, epoxidized soybean oil, and epoxidized natural rubber.
- the ethyleneimine derivative include ethylenimine, propyleneimine, N-phenylethyleneimine, and N- (j8-cyanethyl) ethylenimine.
- examples of the thiirane compound include thiirane, methylthiilan, and futiliilan.
- the halogenated isocyano compound as the component (h) is a compound having a structure represented by the following general formula (6). (However, in the following general formula (6), X is a halogen atom).
- halogenated isocyano compound examples include 2 amino-6-chloropyridine, 2,5-dibromopyridine, 4 chloro-2 phenylquinazoline, 2,4,5 tribromoimidazole, 3,6-dichloro-4-methinorepyridazine.
- examples of the carboxylic acid include acetic acid, stearic acid, adipic acid, maleic acid, benzoic acid, acrylic acid, methacrylic acid, phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, Examples include pyromellitic acid, meritic acid, polymethacrylic acid ester compound, or hydrolysate or partial hydrolyzate of polyataryl acid compound.
- examples of acid compounds and logene compounds include acetic acid chloride, propionic acid chloride, butanoic acid chloride, isobutanoic acid chloride, octanoic acid chloride, acrylic acid chloride, benzoic acid chloride, and stearic acid chloride.
- ester compounds include, for example, ethyl acetate, ethyl stearate, ethyl adipate, methyl maleate, methyl benzoate, ethyl acrylate, ethyl methacrylate, ethyl phthalate, Examples thereof include dimethyl terephthalate, tributyl trimellitic acid, tetraoctyl pyromellitic acid, hexaethyl melitrate, vinyl acetate, polymethyl methacrylate, polyethyl acrylate, and polyisobutyl acrylate.
- the carbonate ester compound include dimethyl carbonate, jetyl carbonate, dipropyl carbonate, dihexyl carbonate, diphenyl carbonate and the like.
- examples of the acid anhydride include intermolecular acids such as acetic anhydride, propionic anhydride, isobutyric anhydride, isovaleric anhydride, heptanoic anhydride, benzoic anhydride, and cinnamate anhydride.
- Molecule such as anhydride, succinic anhydride, methyl succinic anhydride, maleic anhydride, glutaric anhydride, citraconic anhydride, phthalic anhydride, styrene maleic anhydride copolymer represented by the general formula (5) Mention may be made of internal acid anhydrides.
- the compound exemplified as the component (i) contains an aprotic polar group such as an ether group or a tertiary amino group in the molecule as long as the object of the present invention is not impaired. It may be a thing.
- component can also be used individually by 1 type or in mixture of 2 or more types.
- the component (i) may contain a compound containing a free alcohol group or phenol group as an impurity.
- diphenol tin bismethyl malate diphenol tin bis-2-ethylhexyl malate, diphenol tin bisoctyl malate, diphenolinosbisbenzenoremalate, gen-butinoreszbis Methinoremalate, G-n-Butinolesuzubis 2-Ethinorehexinolemalate, Gee-N-Butinolesbisoctinoremalate, Gee-N-Butinolesbisbenzalemalate, Gee-Butylesbisbenzalmalate, Gee-Butylalesbis 2 -Etino hexenoremalate, tert-butylenos bisoctinoremalate, tert-butyltin bisbenzylmalate, diisobutyltin bismethylmalate, diisobutyltin bis-2-ethylhexylmalate, diisobutyltin bisio Cutylmalate,
- examples of the compound represented by the general formula (5) include diph-norresumarate, zi-n-butinolesumarate, zi-butylinoresumarate, jiibuchi Nolesuzumaleate, diisopropinolessesumarate, dihexinolessesumarate, di-2-ethy Nohexinolesssumarate, dioctinoresuzumaleate, disteinorezusumarate, diben Diltin malate, diphenyltin diagitate, di-n-butinoles agitate, di-t-butyltin agitate, diisoptyltin agitate, diisopropyltin agitate, dihexaciltin diacetate, di-2-ethylhexyltin agitate, Dioctyl tin agitate, distearinoles agitate, dibenzyl tin
- an alkoxysilane compound having at least one epoxy group and Z or isocyanate group in the molecule is preferably used.
- an alkoxysilane compound having at least one epoxy group and Z or isocyanate group in the molecule is preferably used.
- a Lewis acid can be added to the reaction system in order to accelerate the reaction.
- a Lewis acid is preferable because it acts as a catalyst to promote the coupling reaction, improve the cold flow of the modified polymer, and improve storage stability.
- Specific examples of Lewis acids include dibutyltin dilaurate, dioctyltin dilaurate, dibutinores bis 2-ethylhexyl malate alkylmalate, dioctyltin bis-2-ethylhexyl malate, aluminum triisopropoxide, etc. be able to.
- modifiers may be used alone or in admixture of two or more.
- the amount of modifier used relative to component (a) is 0.01 It is preferable that it is -200 S, more preferably 0.1-150. If it is less than 0.01, the reaction tends not to proceed sufficiently, and the effect of improving the mechanical properties and rubber elasticity tends to be hardly exhibited. On the other hand, if it exceeds 200, the effect of improving physical properties is saturated, so that it is economically undesirable, and in some cases, toluene-insoluble matter (gel) tends to be easily formed.
- the modification reaction is preferably carried out at a temperature of 160 ° C or lower, preferably -30 to 130 ° C, with stirring for 0.1 to 10 hours, and for 0.2 to 5 hours. More preferably.
- the target polymer is prepared by deactivating the catalyst after the modification reaction is completed, adding a polymer stabilizer to the reaction system as necessary, and removing a known solvent in the production of a conjugate polymer. It can be recovered by a drying operation.
- the ethylene 'a-olefin-based copolymer rubber is not particularly limited as long as it is a copolymer rubber including a structural unit (al) derived from ethylene and a structural unit (a2) derived from a 1-year-old lefin. Therefore, the ethylene 'a-olefin copolymer rubber contains the structural unit (a3) derived from other monomers in addition to the binary copolymer containing the structural unit (al) and the structural unit (a2). Furthermore, a ternary copolymer may be included. Furthermore, as long as it contains the structural unit (al) and the structural unit (a2), it may be a multi-component copolymer containing 4 or more different structural units. Incidentally, ethylene. A Orefuin copolymer rubber may be used either individually or in combination of two or more.
- the proportion of the structural unit (al) contained in the ethylene'-olefin-based copolymer rubber is preferably 35 mol% or more when the total structural unit is 100 mol%. If the proportion of the structural unit (al) is less than 35 mol%, the mechanical strength tends to be insufficient. If the proportion of the structural unit (al) is too large, flexibility tends to be insufficient. Accordingly, ethylene a -. Ratio of Orefuin copolymer rubber contains a structural unit (al), when the total of all structural units was 100 mol%, and still more preferably is 40 to 90 mol% instrument 45 ⁇ 85M ol Especially preferred to be%.
- a-olefin forming the structural unit (a2) include propylene, 1-butene, 2-butene, isobutene, 1-pentene, 2-methyl 1-butene, and 2-methyl 2-butene.
- examples thereof include tennes, 3-methylbutene, 1-hexene, 4-methyl 1-pentene, 3-methyl 1-pentene, 1-heptene, 1-octene, 1-decene and 1-undecene.
- propylene, 1-butene and 1-octene are preferred.
- the proportion of the structural unit (a2) contained in the ethylene'a-olefin-based copolymer rubber is preferably 5 to 65 mol% or more when the total structural unit is 100 mol%. It is particularly preferable that the content is 15 to 40 mol%. If the proportion of the structural unit (a 2) is less than 5 mol%, the desired rubber elasticity tends to be hardly exhibited. On the other hand, when the proportion of the structural unit (a2) is more than 65 mol%, the durability tends to decrease.
- examples of the monomer constituting the structural unit (a3) include non-conjugated Geni compounds.
- non-conjugated gen compounds include linear acyclic gen compounds such as 1,4 monohexagen, 1,5 hexagen, 1,6 hexagen; 5-methyl-1,4 hexagen, 3 , 7 Dimethyl-1,6—octagen, 5,7 Dimethylocta1,6 gen, 3,7 Dimethyl-1,7—octagen, 7 Methyl otater 1,6 gen, Dihydromyrcene, etc.
- Methyl tetrahydroindene, dicyclopentagen bicyclo [2. 2. 1] —hepter 2,5 gen, 5—methylene 2 norbornene, 5 ethylidene 2 norbornene, 5—probe 2 norbornene, 5—isopropyl Examples thereof include alicyclic gen compounds such as redene-2-nobornene, 5-cyclohexylidene-2-norbornene, and 5-bur-2-norbornene. Of these, 1,4 monohexagen, dicyclopentagen, and 5-ethylidene 2-norbornene are preferred. These non-conjugated diene compounds can be used alone or in combination of two or more.
- the proportion of structural unit (a3) contained in this ethylene' a-olefin copolymer rubber is 100 mol of all structural units. % Is preferably 15 mol% or less, more preferably 1 to 12 mo 1%. If the proportion of the structural unit (a3) is more than 15 mol%, the durability tends to decrease. [0086] Further, as the ethylene'a-olefin-based copolymer rubber, some of the hydrogen atoms in the molecule of the ethylene'a-year-old olefin-based copolymer rubber described so far are halogen atoms such as chlorine atoms and bromine atoms. Substituted halogenated copolymer can also be used.
- a graft polymer obtained by polymerizing an unsaturated monomer with the ethylene • a-olefin-based copolymer rubber described so far can also be used as the ethylene 'a-olefin-based copolymer rubber.
- Unsaturated monomers include: salt butyl; acetate acetate; (meth) acrylic acid, methyl (meth) acrylate, glycidyl (meth) acrylate, (meth) acrylamide and other (meth) acrylic acid derivatives; maleic acid And maleic acid derivatives such as maleic anhydride, maleimide, and dimethyl maleate; and conjugated-gen compounds such as butadiene, isoprene, and black-opened plane.
- the degree of crystallinity of the ethylene'a-olefin-based copolymer rubber by X-ray diffraction measurement is preferably 20% or less, and more preferably 15% or less. When the crystallinity of the ethylene'a-olefin copolymer rubber exceeds 20%, the flexibility tends to decrease.
- Ethylene 'a-olefin-based copolymer rubber is made of, for example, ethylene, a -olefin and non-olefin in the presence of a solvent-powered catalyst including a Ziegler' Natta catalyst, a soluble vanadium compound, and an organoaluminum compound.
- the conjugated genie compound can be obtained by a polymerization method using a medium-low pressure method such as a method of polymerizing while supplying hydrogen as a molecular weight regulator as necessary.
- the polymerization can be carried out by a gas phase method (fluidized bed or stirred bed) or a liquid phase method (slurry method or solution method).
- Examples of the soluble vanadium compound include at least one of VOC1 and VC1.
- Alcohols include methanol, ethanol, n -propanol, isopropyl alcohol, n-butanol, sec butyl alcohol, t-butyl alcohol, n-xanol, n-octanol, 2-ethylhexanol, n-decanol, and n-dodecanol. Of these, alcohols having 38 carbon atoms are preferably used.
- organoaluminum compound examples include triethylaluminum, triisobutylaluminum, tri-n-xylaluminum, jetylaluminum monochloride, diisobutylaluminum monochloride, ethylaluminum sesquich chloride, butyl.
- organoaluminum compound examples include triethylaluminum, triisobutylaluminum, tri-n-xylaluminum, jetylaluminum monochloride, diisobutylaluminum monochloride, ethylaluminum sesquich chloride, butyl.
- examples thereof include aluminum sesqui-chloride, ethylaluminum dichloride, butylaluminum dichloride, and methylaluminoxane which is a reaction product of trimethylaluminum and water.
- ethylaluminum sesquichloride ethylaluminum sesquichloride, butylaluminum sesquichloride, a mixture of ethylaluminum sesquichloride and triisobutylaluminum, and a mixture of triisobutylaluminum and butylaluminum sesquichloride are preferably used.
- hydrocarbons are preferably used, and among these, n-pentane, n-hexane, n-heptane, n-octane, isooctane, and cyclohexane are particularly preferably used. It is done. These can be used alone or in combination of two or more.
- an oil-extended rubber obtained by adding a mineral oil-based softener to the ethylene' ⁇ -year-old olefin-based copolymer rubber described so far can also be used.
- Such an oil-extended rubber is easy to handle. Accordingly, it is preferable to use an oil-extended rubber as an ethylene-olefin-based copolymer rubber because the production of the thermoplastic elastomer composition is facilitated.
- the intrinsic viscosity (measured in a decalin solvent at 135 ° C) of the ethylene'-olefin copolymer rubber is preferably 1. OdlZg or more. If the intrinsic viscosity of the ethylene 'a-olefin copolymer rubber is less than 1. OdlZg, for example, when the aforementioned oil-extended rubber is used as the ethylene' a-olefin copolymer rubber, the composition strength of the thermoplastic elastomer will also be mineral. Oil-based softeners bleed out and rubber elasticity tends to decrease.
- the intrinsic viscosity of the ethylene 'a-olefin copolymer rubber is more preferably 2.0 to 7. OdlZg, and particularly preferably 3.0 to 6. OdlZg.
- thermoplastic resin (B) [0096]
- thermoplastic elastomer composition of the present invention has a melt tension at 210 ° C, a take-off speed of 2. Om / min, and a melt tension of less than 3. OcN.
- ⁇ -2 ⁇ -olefin-based amorphous thermoplastic resin (these are sometimes collectively referred to as “Hyrefin-based thermoplastic resin ( ⁇ )”) (hereinafter referred to as “( ⁇ ) component”) (Also called).
- the a-olefin-based crystalline thermoplastic resin (B-1) is not particularly limited as long as it is a crystalline resin containing oc-olefin as the main monomer, and is a homopolymer of a 1-year-old lefin. Or a copolymer of a-olefin and other monomers. Further, it may be a mixture of two or more different polymers and Z or a copolymer.
- the a-olefin-based crystalline thermoplastic resin (B-1) contains 80 mol% or more (more preferably 90 mol% or more) of a to olefin in the whole monomer structural unit. preferable.
- the oc-olefins constituting the a-olefin-based crystalline thermoplastic resin (B-1) include ethylene, propene (propylene), 1-butene, 1-pentene, 3-methyl 1-butene, 1 —Hexene, 3-methyl 1-pentene, 4-methyl 1-pentene, 3 ethyl 1 —pentene, 1-octene, 1-decene, 1-undecene, etc. be able to. These can be used singly or in combination of two or more.
- the one-year-old refin crystalline thermoplastic resin (B-1) is a copolymer
- this copolymer may be either a random copolymer or a block copolymer.
- a random copolymer in order to have crystallinity, in a random copolymer, a When the total content of the structural units excluding the 1-year-old refin is 100 mol% of the entire random copolymer, it is 15 mol% or less (more preferably 10 mol). % Or less).
- the total content of structural units excluding (X-olefin) is 40 mol% when the block copolymer is 100 mol%. Or less (more preferably 20 mol% or less).
- the ⁇ -olefin-based amorphous thermoplastic resin (B-2) is not particularly limited as long as it is an amorphous resin containing ⁇ -olefin as a main monomer component, and OC-olefin alone It may be a polymer or (a copolymer of X-olefin and other monomers. Also, it may be a mixture of two or more different types of these polymers and cocoons or copolymers.
- a-olefin-based amorphous thermoplastic resin (B-2) contains 50 mol% or more (more preferably 60 mol% or more) of a-olefin in the whole monomer structural unit. It is preferable that
- oc-olefin that constitutes the a-olefin amorphous thermoplastic resin (B-2) it is preferable to use an oc 1-year-old refin having 3 or more carbon atoms. It is preferable to use a-olefin having 3 to 12 carbon atoms, as exemplified in crystalline thermoplastic resin (B-1)! /.
- Examples of a-olefin amorphous thermoplastic resin (B-2) include homopolymers such as atactic polypropylene and atactic poly-1-butene, propylene (containing 50 mol% or more), and other a-olefins ( Copolymers with ethylene, 1-butene, 1-pentene, 1-hexene, 4-methyl — 1-pentene, 1-octene, 1-decene, etc., 1-butene (containing 50 mol% or more) and others And a copolymer with ⁇ -olefin (ethylene, propylene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, etc.).
- the copolymer may be either a random copolymer or a block copolymer.
- the a-olefin units that are the main components need to be bonded in atactic structure.
- the olefin-based amorphous thermoplastic resin (B-2) is a copolymer of oc 1-year-old refin having 3 or more carbon atoms and ethylene, the total copolymer is assumed to be 100 mol%.
- the a-olefin content is preferably 50% mol or more (more preferably 60 to: L00 mol%).
- the melt tension at OmZmin is less than 3. OcN (for example, 0.3 lcN or more 3. less than OcN, preferably 0.2 cN to 2 . 5c N). If this melt tension exceeds 3. OcN, it is not preferable because a thermoplastic elastomer composition having a good sea-island structure cannot be obtained.
- One or more of the a-olefin crystalline thermoplastic resin (B-1) and one or more of a-olefin amorphous thermoplastic resin (B-2) May be used in combination.
- the component (ii) is less than 20% and the component (ii) is more than 80%, the flexibility and rubber elasticity of the resulting thermoplastic elastomer composition tend to decrease. Therefore, it is possible to obtain a foam excellent in rubber elasticity and flexibility by using a thermoplastic elastomer composition having (ii) component strength of 20% or more and (B) component of 80% or less. .
- thermoplastic elastomer composition Dynamically crosslinkable thermoplastic elastomer composition
- thermoplastic resin is the sea (matrix) and cross-linked rubber particles are islands (domains)), which is characteristic, tends to decrease the fluidity and moldability.
- thermoplastic elastomer composition (1) in the present invention is obtained by dynamically heat-treating a mixture containing the component (A) and the component (B) in the presence of the crosslinking agent (C). It is.
- “dynamic heat treatment” means that both shearing force and heating are performed.
- the thermoplastic elastomer composition obtained by such dynamic heat treatment specifically has (B) component as the sea phase, and particles of (A) component are islands in this sea phase. It forms a so-called sea-island structure that is dispersed as a phase.
- the type of the crosslinking agent (C) (hereinafter also referred to as “component (C)”) used in the dynamic heat treatment is not particularly limited. However, it is desirable that the compound be capable of crosslinking at least component (A) by dynamic heat treatment at a temperature equal to or higher than the melting point of component (B).
- component (C) examples include organic peroxides, phenol resin, sulfur, sulfur compounds, p-quinone, p-quinone dioxime derivatives, bismaleimide compounds, epoxy compounds, sila Examples thereof include amine compounds, amino resins, polyols, polyamines, triazine compounds, and metal stones. Of these, organic peroxides and phenol resin are preferable. These can be used alone or in combination of two or more.
- Organic peroxides include 1,3 bis (t-butylperoxyisopropyl) benzene, 2,5 dimethyl-2,5 bis (t-butylperoxy) hexyne-3, 2,5 dimethyl-2,5 bis (T-butylperoxy) hexene-3, 2, 5 dimethyl-2,5 bis (t butylperoxy) hexane, 2,2,1bis (t butylperoxy) p isopropylbenzene, dicumyl peroxide, di-t-butylperoxide Xoxide, t-butyl peroxide, p-menthane peroxide, 1, 1 bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, dilauroyl peroxide, dicetyl baroxide, t-butyl Peroxybenzoate, 2,4-dichloro-benzoyl peroxide, p-chlorobenzoyl peroxide
- phenol resin examples include p-substituted phenol compounds represented by the following general formula (7), o-substituted phenol 'aldehyde condensate, m-substituted phenol' aldehyde condensate, brominated alkyl phenol 'aldehyde. A condensate etc. can be mentioned. Of these, p-substituted phenolic compounds are preferred. These can be used singly or in combination of two or more.
- X is a hydroxyl group, a halogenated alkyl group, or a halogen atom
- R is a saturated hydrocarbon group having 1 to 15 carbon atoms
- n is an integer of 0 to 10 is there.
- the p-substituted phenol compound can be obtained by a condensation reaction between a p-substituted phenol and an aldehyde (preferably formaldehyde) in the presence of an alkali catalyst.
- the amount of the component (C) used is 0. with respect to a total of 100 parts by mass of the components (A) and (B) contained in the mixture for producing the thermoplastic elastomer composition (1). It is preferable to be 01 to 20 parts by mass. 0.1 to 15 parts by mass is more preferable. 1 to: It is more preferable to be L0 parts by mass.
- the amount of the organic peroxide used is contained in the mixture for producing the thermoplastic elastomer composition (1) (A ) With respect to the total of 100 parts by mass of the component and the component (B), 0.05 to: L0 parts by mass is preferable, and 0.1 to 5 parts by mass is more preferable.
- the amount of the organic peroxide is more than 10 parts by mass, the degree of crosslinking becomes excessively high, the molding processability is lowered, and the mechanical properties of the resulting thermoplastic elastomer composition tend to be lowered. It is in.
- thermoplastic elastomer composition (1) tend to decrease. is there.
- the amount of phenolic resin used is included in the mixture for producing the thermoplastic elastomer composition (1) (A ) Component and (B) component, with respect to 100 parts by mass in total: 0.2 to: L0 parts by mass is preferred, and 0.5 to 5 parts by mass is more preferred. 10 parts by weight of phenol resin If it is super, molding processability tends to be lowered. On the other hand, when the amount of phenolic resin used is less than 0.2, the degree of cross-linking is insufficient, and the rubber elasticity and mechanical strength of the resulting thermoplastic elastomer composition (1) tend to be lowered.
- crosslinking aid and Z or a crosslinking accelerator together with the crosslinking agent because the crosslinking reaction can be performed gently and uniform crosslinking can be formed.
- an organic peroxide sulfur, sulfur compounds (powdered sulfur, colloidal sulfur, precipitated sulfur, insoluble sulfur, surface-treated sulfur, dipentamethylene thiuram tetrath fluid, etc.), oxime Compounds (p-quinoneoxime, p, p, -dibenzoylquinoneoxime, etc.), polyfunctional monomers (ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meta ) Atalylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, diallyl phthalate, tetraaryloxet
- Triarylcyanurate N, N, 1m-phenolene bismaleimide, N, N, 1 toluylene bis maleimide, maleic anhydride, dibutylbenzene, zinc di (meth) acrylate, etc.
- p, p'-dibenzoylquinone oxime, N, N'-m-phelene bismaleimide, and dibutenebenzene are preferable. These can be used individually by 1 type or in combination of 2 or more types.
- N, N, -m-phenolene bismaleimide exhibits an action as a crosslinking agent, and can be used alone as a crosslinking agent.
- the amount of crosslinking aid used is 10 parts by mass with respect to a total of 100 parts by mass of component (A) and component (B) contained in the mixture. It is more preferable that the content be 0.2 to 5 parts by mass.
- the amount of the crosslinking aid used is more than 10 parts by mass, the degree of crosslinking becomes excessively high, the molding processability is lowered, and the mechanical properties of the resulting thermoplastic elastomer composition tend to be lowered.
- phenol resin is used as a crosslinking agent
- a crosslinking accelerator metal halide (salt stannic acid, salt sy ferric iron, etc.), organic halide (chlorinated polypropylene, odor Butyl rubber, chloroprene rubber, etc.) is preferable because the crosslinking rate can be adjusted.
- metal oxides such as zinc oxide are stearin. It is further desirable to use a dispersant such as an acid.
- the thermoplastic elastomer composition (1) preferably further contains a softening agent.
- a softening agent By containing a softening agent, processability and flexibility can be improved.
- the softener a softener generally used for rubber products can be preferably used.
- softeners include petroleum-based substances such as process oil, lubricating oil, norafin, liquid paraffin, petroleum asphalt and petroleum jelly; coal tars such as coal tar and coal tar pitch; castor oil and flax -Fat oils such as oil, rapeseed oil, soybean oil, coconut oil; waxes such as tall oil, beeswax, carnauba wax, lanolin; fatty acids such as ricinoleic acid, palmitic acid, stearic acid, barium stearate, calcium stearate or the like Metal salts; Petroleum resin, coumarone indene resin, synthetic polymer materials such as tactic polypropylene; ester compounds such as dioctyl phthalate, dioctyl adipate, dioctyl sebacate; microcrystalline wax, sub (fattis ), Liquid polybutadiene, modified liquid polybutadiene, liquid thiocol , Liquid polyisopre
- the content of the softening agent is preferably 0 to 200 parts by mass, more preferably 0 to 150 parts by mass with respect to 100 parts by mass of component (A). 0 to LOO mass Part is particularly preferred. If the content of the softening agent is more than 200 parts by mass with respect to 100 parts by mass of component (A), poor dispersion may occur when kneading with component (B).
- thermoplastic elastomer composition (1) (hereinafter also referred to as "MFR")
- thermoplastic elastomer composition (1) Under the conditions of C and 98N load, 0.1 to: L00g / 10min, preferably ⁇ 1.0 to 50g / 10min, more preferably 2.0 to 40gZl0min. If the MFR of the thermoplastic elastomer composition (1) exceeds lOOgZlOmin, it is difficult to form independent bubbles with a low expansion ratio when foamed, and the shape of the formed bubbles is difficult to be uniform. Become. On the other hand, if the MFR of the thermoplastic elastomer composition (1) is less than 0.1 lgZlOmin In some cases, processability and the like due to various foam production methods may be insufficient. Therefore, by using the thermoplastic elastomer composition (1) whose MFR is within the predetermined numerical range, a foam having a high foaming ratio, high closed cell property and uniform foamed cell shape is obtained. It becomes possible.
- the hardness (Du mouth A) of the thermoplastic elastomer composition (1) is 90 or less, preferably 85 or less, more preferably 80 or less.
- the hardness (Du mouth A) of the thermoplastic elastomer composition is more than 90, the foamed product obtained is inferior in flexibility when foamed. Therefore, by using the thermoplastic elastomer composition (1) having a hardness (du mouth A) of a predetermined value or less, it is possible to obtain a foam having excellent flexibility.
- the thermoplastic elastomer composition (1) can be obtained by dynamically heat-treating a mixture containing the component (A) and the component (B) in the presence of the component (C).
- the component (A) and the component (B) may be used as they are, or a composition containing the same or different additives (additives described later, etc.). What was prepared as may be used.
- the shape of the component (A) may be any of a bale shape, a crumb shape, a pellet shape, and a powder shape (including a crushed product of a bale rubber or a crumb rubber). You can also use a combination of multiple components (A) with different shapes!
- melt kneading device As a device used for the dynamic heat treatment, a melt kneading device or the like can be cited as a preferred example.
- the treatment by this melt-kneading apparatus may be either a continuous type or a batch type.
- Specific examples of the melt kneader include an open type mixing roll, a non-open type Banbury mixer, a single screw extruder, a twin screw extruder, a continuous kneader, and a pressure kneader.
- a continuous melt kneader such as a single screw extruder, a twin screw extruder, or a continuous kneader from the viewpoint of economy, processing efficiency, and the like.
- two or more continuous melt kneaders of the same type or different types may be used in combination.
- the LZD ratio (ratio of effective screw length L to outer diameter D) of the twin-screw extruder is preferably 30 or more, more preferably 36 to 60.
- any twin screw extruder such as one in which two screws mate or one in which no two screws mate can be used, but the rotational direction of the two screws is different. Screws go together in the same direction Those are more preferred.
- twin screw extruder for example, the trade name “PCM” (manufactured by Ikegai Co., Ltd.), the trade name “KTX” (manufactured by Kobe Steel), the trade name “ ⁇ ” (manufactured by Nippon Steel Works), The name “ ⁇ ” (manufactured by Toshiba Machine Co., Ltd.), the product name “ZSK” (manufactured by Warner), and the like can be mentioned.
- the LZD ratio (ratio of the effective screw length L to the outer diameter D) of the continuous kneader is preferably 5 or more, and more preferably 10 or more.
- Examples of such continuous kneaders include the product name “Mixtron KTX ⁇ LCM ⁇ NCM” (manufactured by Kobe Steel) and the product name “CIM'CMP” (manufactured by Enomoto Steel). .
- the treatment temperature during the dynamic heat treatment is preferably 120 to 350 ° C, more preferably 150 to 290 ° C.
- the treatment time is preferably 20 seconds to 320 minutes, more preferably 30 seconds to 25 minutes.
- the shearing force to be applied is preferably 10 to 20000 Zsec, more preferably 10 to 20000 Zsec in terms of shear rate.
- the shape of the thermoplastic elastomer composition (1) at the time of preparing the polyolefin resin composition using the thermoplastic elastomer composition (1) is not particularly limited, and is a pellet shape, a powder shape Any of the above.
- polyolefin-based resin (2) any of polyolefin-based crystalline resin, polyolefin-based amorphous resin, and a mixture thereof can be used.
- polyolefin-based crystalline resin and the polyolefin-based amorphous resin those exemplified in the above-mentioned ⁇ -olefin-based thermoplastic resin (B) can be used.
- the melt tension at OmZmin is not particularly limited, but 3. OcN or higher (for example, about 3.0 to 50 cN) is preferable. 5.
- OcN or more for example, about 5.0 to 50 cN) is more preferable.
- OcN or more for example, about 8.0 to 50 cN is particularly preferable.
- the melt tension of the polyolefin resin (2) is less than 3. OcN, it is difficult to form independent bubbles with a low expansion ratio when the polyolefin resin composition is foamed. The shape of the bubbles formed becomes uniform. Therefore, in order to obtain a foam having a high foaming ratio and a high closed cell property and a uniform foamed cell shape, the melt tension of the polyolefin-based resin (2) is 3%. OcN or higher is preferable.
- the amount of polyolefin-based resin (2) used is, for example, 10 to 200 parts by weight, preferably 20 to L00 parts by weight with respect to 100 parts by weight of the thermoplastic elastomer composition (1).
- the amount of the polyolefin resin (2) used is less than 10 parts by mass with respect to 100 parts by mass of the thermoplastic elastomer composition (1), the gas easily escapes at the time of foaming. In addition, it is easy to obtain a fired body, and if it exceeds 200 parts by mass, the cushioning property tends to be lowered.
- the shape of the polyolefin-based resin (2) in preparing the polyolefin-based resin composition using the polyolefin-based resin (2) is not particularly limited, and any of pellet shape, powder shape, etc. It may be.
- the polyolefin resin composition in the present invention contains a nucleating agent (3) having an average particle size of not less than 0 and less than 2.0 ⁇ m.
- the nucleating agent include talc, silica, alumina, my strength, titanium, zinc oxide, zeolite, calcium carbonate, magnesium carbonate, barium sulfate, aluminum hydroxide and other oxides, composite oxides, metals Carbonate, metal sulfate, metal hydroxide, etc. can be used.
- the cell diameter can be easily adjusted, and a foam having an appropriate flexibility and excellent cutting processability can be obtained.
- the average particle size of the nucleating agent (3) is preferably 0.3 ⁇ m or more and 1.5 ⁇ m or less, and particularly preferably 0.4 ⁇ m or more and 1.2 ⁇ m or less. If the average particle size of the nucleating agent (3) is less than 0.1 ⁇ m, it will not function sufficiently as a nucleating agent. When the average particle diameter of the nucleating agent (3) is 2. O / z m or more, the nucleating agent (3) breaks through the cell (bubble) wall, and a high expansion ratio cannot be obtained.
- the average particle size of the nucleating agent can be measured by a laser diffraction particle size distribution measuring method.
- MICRO TRAC MT-3000 manufactured by LEEDS & NORTHRUP INSTRUMENTS can be used to measure from the sample dispersion dilution (AUTO measurement mode).
- the amount of nucleating agent (3) used is the total amount of polymer in the polyolefin resin composition [Rubber (A) and a 1 year old refin thermoplastic resin (B) and polyolefin resin (2)
- the total amount] of 100 parts by mass is preferably 0.5 to 150 parts by mass, more preferably 2 to 140 parts by mass, and particularly preferably 3 to 130 parts by mass. If the amount of the nucleating agent used is too small, it is difficult to obtain the effect of the nucleating agent.
- the nucleating agent can be added to the molding machine as a master batch using polyolefin-based rosin (2) or the like.
- the nucleating agent (3) may be added when preparing the thermoplastic elastomer composition (1) as necessary.
- the polyolefin resin composition according to the present invention comprises, in addition to components (1) to (3), further (4) a fatty acid, fatty acid amide, fatty acid, which is a compound having a polar functional group and a melting point of 50 to 150 ° C.
- the acid metal stone may also contain at least one selected aliphatic compound. When this aliphatic compound (4) is added to polyolefin resin having high crystallinity, a strong film is formed on the surface of the resin, so that a cell is formed when punching the obtained resin foam. The function is to prevent the resin wall surfaces from blocking each other, and the bubbles in the foam are crushed, improving the shape recovery and improving the punching processability.
- the aliphatic compound (4) at least one selected from fatty acids, fatty acid amides, and fatty acid metal stalagmites can be used.
- Power that contains highly polar functional groups Polyolefins It is difficult to be compatible with resin-based resin, so it is easy to exhibit the above effects as soon as it precipitates on the surface of resin.
- the melting point of the aliphatic compound (4) is preferably 50 to 150 ° C. from the viewpoints of lowering the molding temperature, suppressing the deterioration of the polyolefin resin composition, and imparting sublimation resistance. Is 70-100. C.
- the fatty acid those having about 18 to 38 carbon atoms (more preferably 18 to 22) are preferable.
- Specific examples include stearic acid, behenic acid, and 12-hydroxystearic acid. And so on. Of these, behenic acid is particularly preferable.
- the fatty acid amide is preferably a fatty acid amide having a fatty acid moiety having about 18 to 38 carbon atoms (more preferably 18 to 22), and may be either a monoamide or a bisamide.
- stearic acid amide, oleic acid amide, L force acid amide, methylene bis stearic acid amide, ethylene bis stearic acid amide and the like can be mentioned.
- L force acid amide is particularly preferable.
- the metal fatty acid sarcophagus include salts of the above fatty acids such as aluminum, calcium, magnesium, lithium, barium, zinc, and lead.
- the content of the aliphatic compound (4) is, for example, 1 to 5 parts by mass, preferably 1.5 to 100 parts by mass of the total amount of the component (1) and the component (2). 3. 5 parts by mass, more preferably 2 to 3 parts by mass.
- the content of the aliphatic compound (4) is less than 1 part by mass, a sufficient amount of the component (4) does not precipitate on the surface of the resin, and the effect of improving the punching processability is obtained.
- the amount exceeds 5 parts by mass the resin is plasticized, and sufficient pressure cannot be maintained in the extruder, and the content of the foaming agent such as carbon dioxide and carbon in the resin decreases. Therefore, it is difficult to obtain a foam having a sufficient foam density without obtaining a high foaming ratio.
- the polyolefin resin composition of the present invention may further contain various additives as required.
- additives include foaming agents, lubricants, anti-shrinking agents, anti-aging agents, heat stabilizers, light stabilizers such as HALS, weathering agents, metal deactivators, ultraviolet absorbers, and light stabilizers.
- Stabilizers such as copper damage inhibitors, antibacterial agents, fungicides, dispersants, plasticizers, flame retardants, tackifiers, colorants such as carbon black and organic pigments, fillers, isobutylene and isoprene copolymer
- examples thereof include rubber such as coalescence, silicone rubber, ethylene butyl acetate copolymer, and thermoplastic resin such as ABS resin. These additives may be added as necessary when preparing the thermoplastic elastomer composition (1).
- the polyolefin resin foam of the present invention is obtained by foaming a polyolefin resin composition containing at least the components (1), (2) and (3) with supercritical carbon dioxide. It is done.
- carbon dioxide and carbon dioxide are used as the foaming agent, the amount of impregnation into the rubber used as the material for the foam, the a-olefin thermoplastic resin, and the polyolefin resin is large, and the impregnation rate is high.
- carbon dioxide in the supercritical state is used, the solubility in rosin is further increased and high concentration can be mixed, and bubble nuclei are generated more frequently due to the high concentration during a sudden pressure drop.
- Carbon dioxide has a critical temperature of 31 ° C and a critical pressure of 7.4 MPa.
- the polyolefin resin composition is prepared by a conventional melt-kneading apparatus such as an open type mixer roll, a non-open type Banbury mixer, a single screw extruder, a twin screw extruder, a continuous type. It can be carried out using a kneading machine, a pressurizer and a jar.
- a conventional melt-kneading apparatus such as an open type mixer roll, a non-open type Banbury mixer, a single screw extruder, a twin screw extruder, a continuous type. It can be carried out using a kneading machine, a pressurizer and a jar.
- the production of the polyolefin resin foam of the present invention is not particularly limited as long as it can be foam-molded using the polyolefin resin composition, and is performed by any system such as a batch system or a continuous system. Well, ...
- the polyolefin resin composition is extruded using an extruder such as a single screw extruder or a twin screw extruder to produce a foam molding resin sheet.
- the polyolefin resin composition is uniformly kneaded using a kneader equipped with blades such as a roller, a cam, a kneader, a Banbury type, etc., and is heated to a predetermined thickness using a hot plate press or the like.
- a resin sheet for foam molding is produced by press-caching.
- the foam molding resin sheet (unfoamed sheet) thus obtained is placed in a high-pressure vessel, supercritical carbon dioxide is injected, and carbon dioxide is impregnated into the unfoamed sheet.
- the pressure is released (usually up to atmospheric pressure), and bubble nuclei are generated in the resin constituting the sheet.
- Bubble nuclei may be grown as they are at room temperature, but in some cases, they may be grown by heating.
- a heating method a known or conventional method such as a water bath, an oil bath, a hot pot, a hot air oven, a far infrared ray, a near infrared ray, or a microwave can be adopted.
- a polyolefin resin foam can be obtained by rapidly cooling with cold water or the like and fixing the shape.
- the molded object to be used for foaming is not limited to a sheet-like material, and various shapes can be used depending on the application.
- the molded body used for foaming can be produced by other molding methods such as injection molding, as well as extrusion molding and press molding.
- the pressure when impregnating the molded body or the kneaded resin mixture subjected to foaming with supercritical carbon dioxide is a force that can be appropriately selected in consideration of operability, for example, 7.4 MPa or more (for example, 7.4 To about LOOMPa), preferably 8 MPa or more (for example, about 8 to 50 MPa).
- 7.4 MPa or more for example, 7.4 To about LOOMPa
- 8 MPa or more for example, about 8 to 50 MPa.
- the temperature in the gas impregnation process varies depending on the type of aolefin-based thermoplastic resin and polyolefin resin, and can be selected in a wide range, but considering operability, for example, about 31 to 350 ° C It is.
- the temperature during impregnation is preferably 32 ° C or higher, particularly 40 ° C or higher.
- the impregnation temperature when impregnating an unfoamed molded article such as a sheet with an inert gas is about 32 to 200 ° C., preferably about 40 to 200 ° C. in the notch type.
- the continuous impregnation temperature is approximately 60 to 350 ° C when the molten polymer impregnated with gas is extruded and foamed and molded at the same time.
- the decompression speed is not particularly limited, but is preferably about 5 to 20 GPaZ seconds in order to obtain uniform fine bubbles.
- the heating temperature in the heating step is, for example, about 40 to 250 ° C, preferably about 60 to 250 ° C.
- the polyolefin foam resin thus obtained has a high foaming ratio, high closed cell properties, uniform foam cell shape, excellent flexibility and cushioning properties, and good surface appearance.
- the density of the polyolefin resin foam is, for example, 0.2 gZcm 3 or less (about 0.01 to 0.2 g / cm 3 ), preferably 0.02 to 0.15 g / cm 3 , more preferably 0. It is in the range of 03 to 0.12 g Zcm 3 .
- this polyolefin resin foam has a deformed cell structure. Since the particle size of the nucleating agent is small because it is hard to shrink and the strain recovery property when pressed is small, it can form extremely fine bubbles and prevent the nucleating agent from breaking through the bubble wall. Therefore, for example, when punching is performed, the shape of the punched part is excellent in shape recovery at the time of processing such as cutting, in which bubbles are not easily crushed.
- the shape and size of the polyolefin resin foam of the present invention is not particularly limited, but is particularly useful as a sheet-like foam because of its excellent cutting processability as described above.
- the thickness is, for example, a force that can be selected in a wide range of 0.1 to 5. Omm, especially a thin sheet of about 0.2 to 3. Omm. Even if it exists, it can be used conveniently as a foam sheet excellent in workability.
- the polyolefin resin foam of the present invention is, for example, an internal insulator such as an electronic device or an information device, a cushioning material, a dustproof material, a sound insulating material, a heat insulating material, or a food packaging material, clothing material, building material, It can be used for interior parts and exterior parts such as cars and home appliances.
- Pentaerythritol tetrakis [3— (3,5-di-tert-butyl 4-hydroxyphenol) propionate], trade name “Ilganox 1010”, manufactured by Ciba Specialty Chemicals ⁇ Crosslinking agent>
- thermoplastic elastomer composition 100 parts of the pellets obtained in Production Example 1 and 25 parts of carbon black were put into a pressure-type jar (capacity 10 liters, manufactured by Moriyama Co., Ltd.) heated to 160 ° C in advance.
- a kneaded material in a molten state was obtained by kneading for 15 minutes at 40 rpm (shear speed 200 Zsec) until the thermoplastic elastomer composition was melted and each component was uniformly dispersed.
- the obtained kneaded material in a molten state was subjected to pelletizing using a feeder-ruder (manufactured by Moriyama Co., Ltd.) to obtain a thermoplastic elastomer composition (mouth).
- thermoplastic rosin trade name “Newstre SH9000”
- polyethylene 1 part of stearic acid monoglyceride
- nucleating agent magnesium hydroxide magnesium with an average particle size of 0.8 ⁇ m
- thermoplastic elastomer composition obtained in Production Example 2 (mouth)
- 39 parts of thermoplastic resin (trade name “Newstrain SH9000”)
- 39 parts of lubricant (1 part of monoglyceride stearate and 10 parts of polyethylene) 1 part and 10 parts of nucleating agent (magnesium hydroxide with an average particle size of 0.8 ⁇ m)
- nucleating agent magnesium hydroxide with an average particle size of 0.8 ⁇ m
- This pellet was put into a single screw extruder, and carbon dioxide was injected in a 220 ° C atmosphere at a pressure of 14 MPa (after injection: 18 MPa). It was. After sufficiently saturating the carbon dioxide, the die was extruded to obtain a sheet-like foam (2.4 mm thickness).
- thermoplastic elastomer composition (C) obtained in Production Example 3 38 parts of thermoplastic rosin (trade name “Newstrain SH9000”), and 10 parts of polyethylene (1 part of stearic acid monoglyceride). 10 parts and 10 parts of nucleating agent (hydroxymagnesium hydroxide with an average particle size of 0.8 ⁇ m) were kneaded in a twin-screw kneader at a temperature of 200 ° C and extruded into a strand. After cooling with water, it was cut into a pellet and molded.
- nucleating agent hydroxymagnesium hydroxide with an average particle size of 0.8 ⁇ m
- This pellet was put into a single screw extruder, and carbon dioxide was injected in a 220 ° C atmosphere at a pressure of 14 MPa (after injection: 18 MPa). After sufficiently saturating the carbon dioxide, the die was extruded to obtain a sheet-like foam (thickness: 2. Om m).
- thermoplastic elastomer composition (C) obtained in Production Example 3 38 parts of thermoplastic rosin (trade name “Newstrain SH9000”), and 10 parts of polyethylene (1 part of stearic acid monoglyceride). 8 parts, nucleating agent (magnesium hydroxide with an average particle size of 0.8 m), 8 parts, and 11 parts of carbon black were kneaded at a temperature of 200 ° C in a twin-screw kneader. Thereafter, it was extruded into a strand shape, cooled with water, cut into a pellet shape, and molded.
- thermoplastic rosin trade name “Newstrain SH9000”
- This pellet was put into a single screw extruder, and carbon dioxide was injected in a 220 ° C atmosphere at a pressure of 14 MPa (after injection: 18 MPa). After sufficiently saturating the carbon dioxide, it was extruded from Daika to obtain a sheet-like foam (thickness 2.1 mm).
- thermoplastic elastomer composition obtained in Production Example 3 (c)
- thermoplastic resin trade name “Newstoren SH9000”
- lubricant 1 part of stearic acid monoglyceride and 10 parts of polyethylene
- nucleating agent magnesium hydroxide with an average particle size of 0.8 m
- carbon black 9.5 parts in a twin-screw kneader at a temperature of 200 ° C After being kneaded in, it was extruded into a strand shape, cooled with water, cut into a pellet shape, and molded.
- This pellet was put into a single screw extruder, and carbon dioxide was injected in a 220 ° C atmosphere at a pressure of 14 MPa (after injection: 18 MPa). After sufficiently saturating the carbon dioxide, extrude from Daika, A foam-like foam (thickness 2.3 mm) was obtained.
- thermoplastic elastomer composition obtained in Production Example 3 (c), 51 parts of thermoplastic rosin (trade name “Newstrain SH9000”), lubricant (1 part of stearic acid monoglyceride and 10 parts of polyethylene) 10 parts, 10 parts of nucleating agent (hydroxymagnesium hydroxide with an average particle diameter of 0.8 ⁇ m), 6 parts of carbon black, and 2 parts of L-acid amide (melting point 83 ° C)
- the mixture was kneaded at a temperature of 200 ° C. in a kneader, extruded into a strand, cooled with water, cut into a pellet and molded.
- This pellet was put into a single screw extruder, and carbon dioxide was injected at a pressure of 14 MPa (after injection: 18 MPa) in an atmosphere of 220 ° C. After carbon dioxide was sufficiently saturated, die force extrusion was performed to obtain a sheet-like foam (thickness 2. Omm).
- thermoplastic elastomer composition obtained in Production Example 3 (c), 51 parts of thermoplastic rosin (trade name “Newstrain SH9000”), lubricant (1 part of stearic acid monoglyceride and 10 parts of polyethylene) 10 parts, 10 parts of nucleating agent (hydroxymagnesium hydroxide with an average particle size of 0.8 ⁇ m), 6 parts of carbon black, and 2 parts of behenic acid (melting point 77 ° C) After kneading with a kneader at a temperature of 200 ° C., it was extruded into a strand, cooled with water, cut into a pellet and molded.
- thermoplastic rosin (trade name “Newstrain SH9000”)
- lubricant (1 part of stearic acid monoglyceride and 10 parts of polyethylene) 10 parts
- nucleating agent hydroxymagnesium hydroxide with an average particle size of 0.8 ⁇ m
- carbon black 6 parts
- behenic acid melting point
- This pellet was put into a single screw extruder, and carbon dioxide was injected in a 220 ° C atmosphere at a pressure of 14 MPa (after injection: 18 MPa). After sufficiently saturating carbon dioxide, die force extrusion was performed to obtain a sheet-like foam (thickness: 2. Omm).
- Thermoplastic elastomer composition (2) [Trade name “Etaselink 3701B”, manufactured by JSR, a blend of polypropylene (PP) and ethylene Z propylene Z5 ethylidene 2 norbornene terpolymer (EPT) (TPO) ( Carbon black is included (16.7% by mass)] 50 parts, thermoplastic resin (trade name “Newstrain SH9000”) 50 parts, lubricant (masterbatch containing 1 part of monoglyceride stearate and 10 parts of polyethylene) 10 Parts, 10 parts of nucleating agent (magnesium hydroxide with an average particle size of 0.8 m) were kneaded in a twin-screw kneader at a temperature of 200 ° C, extruded into strands, cooled in water, and pelletized.
- EPT ethylene Z propylene Z5 ethylidene 2 norbornene terpolymer
- TPO Carbon black is included (16.
- a sheet-like foam was punched into a size of 100 mm ⁇ 100 mm to obtain a test piece. After measuring the dimensions of the test piece with calipers, the mass was measured with an electronic balance, and the density was determined by the following equation.
- Sheet processing foam (70mm x 220mm size) is placed on a polypropylene plate and fixed with two 1.8mm spacers (product name "NCA07", thickness 0. 7 mm, cutting edge angle 43 °, manufactured by Nakayama Co., Ltd.), and the foam was punched out (cut).
- the cutting width was set to 2.5 mm. 2 hours after punching, the foam is observed visually and with a digital microscope, and the foam is not crushed. (There is almost no difference in thickness between the punched part (end) of the foam and other parts) ) Is “ ⁇ ” (see Fig. 1), the foam punching part (end) is crushed !, and the top part of the foam punching part is rounded. “X” (see Fig. 2) was evaluated as having a large difference in thickness.
- Sheet processing foam (70mm x 220mm size) is placed on a polypropylene plate and fixed with two 1.8mm spacers (trade name "ANG790", thickness 0. 7 mm, blade angle 90 °, made by Nakayama Co., Ltd.) and the foam was punched out (cut). The cutting width was set to 2.5 mm. Two hours after punching, the foam was observed visually and with a digital microscope, and evaluated in the same manner as in the above-described cutting workability-1.
- [0173] [50% compression strain recovery rate] In a 23 ° C, 50% RH atmosphere, a sheet-like foam test piece (30 mm x 30 mm size) is compressed to 50% of the test piece thickness using two compression plates. After holding for 24 hours at 23 ° C or 40 ° C), the test piece was released from the compressed state, the thickness of the test piece immediately after that was measured, and the 50% compression strain recovery rate was calculated by the following formula.
- the foams of the examples have a high 50% j earth shrinkage strain recovery rate and excellent cutting workability compared to the foams of the comparative examples. Also, as shown in Examples 6 and 7, specific In the foam obtained by blending the above aliphatic compounds, it is difficult for the cell walls to block each other, and when punching is performed, it is difficult for the cells to remain crushed. It shows good strength even at an angle of 90 °.
- the polyolefin resin foam of the present invention is excellent in flexibility and cushioning properties, and in addition, it is excellent in applicability. In particular, even if the expansion ratio is high, it has excellent shape recoverability that makes it difficult for the bubbles at the punched portion to collapse during punching. For this reason, the processing width can be made extremely narrow, and the thickness selection range can be widened.
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Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07740687A EP2000500A4 (en) | 2006-03-30 | 2007-03-30 | POLYOLEFIN RESIN FOAM AND MANUFACTURING METHOD THEREFOR |
| US11/994,394 US8101671B2 (en) | 2006-03-30 | 2007-03-30 | Polyolefin resin foam and the process for producing the same |
| CN2007800006608A CN101331179B (zh) | 2006-03-30 | 2007-03-30 | 聚烯烃类树脂发泡体及其制备方法 |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2006095890 | 2006-03-30 | ||
| JP2006-095890 | 2006-03-30 | ||
| JP2007-026043 | 2007-02-05 | ||
| JP2007026043A JP5121243B2 (ja) | 2006-03-30 | 2007-02-05 | ポリオレフィン系樹脂発泡体とその製造方法 |
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| WO2007119625A1 true WO2007119625A1 (ja) | 2007-10-25 |
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| PCT/JP2007/057251 Ceased WO2007119625A1 (ja) | 2006-03-30 | 2007-03-30 | ポリオレフィン系樹脂発泡体とその製造方法 |
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| Country | Link |
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| US (1) | US8101671B2 (ja) |
| EP (1) | EP2000500A4 (ja) |
| JP (1) | JP5121243B2 (ja) |
| KR (1) | KR20080065542A (ja) |
| CN (1) | CN101331179B (ja) |
| TW (1) | TW200804486A (ja) |
| WO (1) | WO2007119625A1 (ja) |
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| US8501310B2 (en) * | 2008-02-26 | 2013-08-06 | Nitto Denko Corporation | Foam waterproofing material with a micro cell structure |
| JP2009235329A (ja) * | 2008-03-28 | 2009-10-15 | Sekisui Plastics Co Ltd | ポリプロピレン系樹脂発泡体の製造方法及びポリプロピレン系樹脂発泡体 |
| JP2012020443A (ja) * | 2010-07-13 | 2012-02-02 | Canon Inc | 弾性ローラおよびその製造方法 |
| US9150716B2 (en) * | 2010-12-14 | 2015-10-06 | Nitto Denko Corporation | Resin foam and foam sealing material |
| US20130251979A1 (en) * | 2010-12-14 | 2013-09-26 | Nitto Denko Corporation | Resin foam and foam sealing material |
| US9499675B2 (en) | 2012-04-27 | 2016-11-22 | Inoac Corporation | Method for producing resin foam, and resin foam |
| JPWO2013161714A1 (ja) * | 2012-04-27 | 2015-12-24 | 株式会社イノアックコーポレーション | 樹脂発泡体の製造方法および樹脂発泡体 |
| WO2013161714A1 (ja) * | 2012-04-27 | 2013-10-31 | 株式会社イノアックコーポレーション | 樹脂発泡体の製造方法および樹脂発泡体 |
| JP2013253241A (ja) * | 2012-05-11 | 2013-12-19 | Nitto Denko Corp | 樹脂発泡体及び発泡シール材 |
| JPWO2022210956A1 (ja) * | 2021-03-31 | 2022-10-06 | ||
| WO2022209767A1 (ja) * | 2021-03-31 | 2022-10-06 | 日東電工株式会社 | 樹脂発泡体 |
| JPWO2022210957A1 (ja) * | 2021-03-31 | 2022-10-06 | ||
| JP2022158988A (ja) * | 2021-03-31 | 2022-10-17 | 日東電工株式会社 | 樹脂発泡体 |
| JP7288994B2 (ja) | 2021-03-31 | 2023-06-08 | 日東電工株式会社 | 樹脂発泡体 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007291337A (ja) | 2007-11-08 |
| EP2000500A1 (en) | 2008-12-10 |
| TW200804486A (en) | 2008-01-16 |
| US8101671B2 (en) | 2012-01-24 |
| US20090209670A1 (en) | 2009-08-20 |
| CN101331179B (zh) | 2012-04-18 |
| JP5121243B2 (ja) | 2013-01-16 |
| CN101331179A (zh) | 2008-12-24 |
| TWI379857B (ja) | 2012-12-21 |
| KR20080065542A (ko) | 2008-07-14 |
| EP2000500A4 (en) | 2010-07-28 |
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