WO2013100452A1 - Procédé de préparation d'une résine thermodurcissable et produit moulé à base de celle-ci - Google Patents

Procédé de préparation d'une résine thermodurcissable et produit moulé à base de celle-ci Download PDF

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Publication number
WO2013100452A1
WO2013100452A1 PCT/KR2012/010908 KR2012010908W WO2013100452A1 WO 2013100452 A1 WO2013100452 A1 WO 2013100452A1 KR 2012010908 W KR2012010908 W KR 2012010908W WO 2013100452 A1 WO2013100452 A1 WO 2013100452A1
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Prior art keywords
resin
methacrylate
thermosetting
acrylate
acrylic
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Ceased
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PCT/KR2012/010908
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English (en)
Korean (ko)
Inventor
반균하
정창도
장태욱
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Cheil Industries Inc
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Cheil Industries Inc
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Priority claimed from KR1020120145581A external-priority patent/KR101550199B1/ko
Application filed by Cheil Industries Inc filed Critical Cheil Industries Inc
Publication of WO2013100452A1 publication Critical patent/WO2013100452A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • 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
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/005—Processes for mixing polymers
    • 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
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0025—Crosslinking or vulcanising agents; including accelerators
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • 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
    • C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
    • 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
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • 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 method for producing a thermosetting resin and molded articles thereof. More specifically, the present invention relates to a method for preparing a thermosetting resin having excellent scratch resistance and a thermosetting molded article having excellent scratch resistance.
  • Polycarbonate resin has excellent mechanical strength and is excellent in transparency, thermal stability, self-extinguishing and dimensional stability.It is widely used in electric and electronic products and automobile parts, and it is easy to achieve flame retardancy due to its chemical structure. It is easy to achieve flame retardancy with a small amount of flame retardant.
  • the scratch resistance of polycarbonate itself is not good at around the pencil hardness B, there is a problem in that the polycarbonate resin cannot achieve good scratch resistance.
  • the pencil hardness of the resin itself is very good, about 3H.
  • the present inventors mixed a low-viscosity acrylic resin with a polycarbonate resin to position the acrylic resin on the surface of the composition, and added a curing agent before molding to cure the acrylic resin moved to the surface. It is to develop a thermosetting molded article excellent in scratch resistance.
  • An object of the present invention is to provide a new method of producing a thermosetting resin that can be applied to a thermosetting molded article having excellent scratch resistance.
  • Another object of the present invention is to provide a method for producing a thermosetting resin that can be applied to a thermosetting molded article that does not require a painting and coating process.
  • Still another object of the present invention is to provide a thermosetting molded article having excellent scratch resistance.
  • thermoset molded article which does not require a painting and coating process.
  • Method for producing a thermosetting resin comprises the steps of (a) extruding a polycarbonate resin and an acrylic resin in the extruder to produce a thermoplastic resin; (b) mixing the thermoplastic resin composition with a curing agent in an injection molding machine to produce a thermosetting resin.
  • the acrylic resin has a melt flow index of 20 to 100 g / 10min, measured under a temperature of 230 ° C. and a load of 3 kg according to ASTM D1238.
  • thermosetting resin may be used 1 to 15 parts by weight of the curing agent based on 100 parts by weight of the thermoplastic resin consisting of 50 to 90% by weight of the polycarbonate resin and 10 to 50% by weight of the acrylic resin.
  • acrylic resin one or more homopolymers, copolymers or mixtures thereof selected from the group consisting of acrylic acid monomers, methacrylic acid monomers, acrylic acid alkylester monomers and methacrylic acid alkylester monomers may be used.
  • acrylic resins examples include polyacrylates, polymethacrylates, polymethylacrylates, polymethylmethacrylates, polyethylacrylates, polyethylmethacrylates, polypropylacrylates, polypropylmethacrylates, and polybutylacrylates. Latex, polybutyl methacrylate, polypentyl acrylate, polypentyl methacrylate, polycyclohexyl acrylate, polycyclohexyl methacrylate, poly n-hexyl acrylate, poly n-hexyl methacrylate, polyglycid Diacrylate, polyglycidyl methacrylate, poly acrylic acid, polymethacrylic acid, and mixtures thereof.
  • curing agent the hardening
  • the impact reinforcing material may be further included in an amount of 1 to 30 parts by weight based on 100 parts by weight of the thermoplastic resin including the polycarbonate resin and the acrylic resin.
  • the impact modifier may be selected from the group consisting of rubber modified graft copolymers, olefin copolymers, and mixtures thereof.
  • thermosetting resin prepared by the method for producing a thermosetting resin.
  • Thermosetting molded article according to the present invention (A) polycarbonate resin; And (B) an acrylic resin, wherein the crosslinking degree of the acrylic resin is 50 to 95%.
  • thermosetting molded article may be made of 50 to 90 wt% of a polycarbonate resin (A) and 10 to 50 wt% of an acrylic resin (B).
  • acrylic resin one or more homopolymers, copolymers or mixtures thereof selected from the group consisting of acrylic acid monomers, methacrylic acid monomers, acrylic acid alkylester monomers and methacrylic acid alkylester monomers may be used.
  • acrylic resin polyacrylate, polymethacrylate, polymethylacrylate, polymethylmethacrylate, polyethylacrylate, polyethyl methacrylate, polypropylacrylate, polypropyl methacrylate, polybutyl Acrylate, polybutyl methacrylate, polypentyl acrylate, polypentyl methacrylate, polycyclohexyl acrylate, polycyclohexyl methacrylate, poly n-hexyl acrylate, poly n-hexyl methacrylate, polyglycol Cyl acrylate, polyglycidyl methacrylate, poly acrylic acid, polymethacrylic acid, and mixtures thereof.
  • Impact reinforcing material may be further included in an amount of 1 to 30 parts by weight based on 100 parts by weight of the resin made of the polycarbonate-based resin (A) and the acrylic resin (B).
  • the impact modifier may be selected from the group consisting of rubber modified graft copolymers, olefin copolymers, and mixtures thereof.
  • the present invention provides a method for producing a new thermosetting resin capable of producing a thermosetting molded article excellent in scratch resistance, and further has the effect of the invention of providing a method for producing a thermosetting resin that does not require a coating or coating process for a thermosetting molded article.
  • thermosetting resin 1 is a view schematically showing a manufacturing process of a thermosetting resin according to the present invention.
  • the present invention relates to a method for producing a thermosetting resin having excellent scratch resistance, and provides a thermosetting molded article having excellent scratch resistance, thereby providing a method for producing a thermosetting resin without requiring a coating or coating process on the molded article. It is to.
  • Method for producing a thermosetting resin comprises the steps of (a) extruding a polycarbonate resin and an acrylic resin in the extruder to produce a thermoplastic resin; (b) mixing the thermoplastic resin composition with a curing agent in an injection molding machine to produce a thermosetting resin.
  • Method for producing a thermoplastic resin comprises the steps of (a) extruding a polycarbonate resin and an acrylic resin in the extruder to produce a thermoplastic resin; (b) mixing the thermoplastic resin composition with a curing agent in an injection molding machine to produce a thermosetting resin.
  • thermoplastic resin according to the present invention It is preferable to supply the acrylic resin to the side of the extruder, and to supply the curing agent to the side of the injection machine.
  • the curing agent When the curing agent is added in the manufacturing step of the thermoplastic resin, the curing agent is activated due to the heat generated during extrusion, and the acrylic resin is present in the form of particles in the polycarbonate resin, so that the scratch resistance of the thermosetting molded article cannot be improved.
  • the acrylic resin, the curing agent or both may be supplied to the side of the extruder, the injection machine or both.
  • the polycarbonate resin of the present invention may be prepared by reacting diphenols represented by the following formula (1) with phosgene, halogen formate, or carbonic acid diester:
  • A represents a single bond, C 1 -C 5 alkylene, C 1 -C 5 alkylidene, C 5 -C 6 cycloalkylidene, -S- or -SO 2- .
  • the diphenol of Formula 1 is 4,4'-dihydroxydiphenyl, 2,2-bis- (4-hydroxyphenyl) -propane, 2,4-bis- (4-hydroxyphenyl) -2- Methylbutane, 1,1-bis- (4-hydroxyphenyl) -cyclohexane, 2,2-bis- (3-chloro-4-hydroxyphenyl) -propane, 2,2-bis- (3,5 -Dichloro-4-hydroxyphenyl) -propane, and the like, but is not necessarily limited thereto.
  • diphenol compound compounds such as hydroquinone and resorcinol can be used.
  • 2,2-bis- (4-hydroxyphenyl) -propane 2,2-bis- (3,5-dichloro-4-hydroxyphenyl) -propane, 1,1-bis- (4- Bisphenols, such as hydroxyphenyl) -cyclohexane, are preferable, and 2, 2-bis- (4-hydroxyphenyl) propane also called bisphenol-A is especially preferable.
  • the polycarbonate resin preferably has a weight average molecular weight (Mw) of 10,000 to 200,000 g / mol, more preferably 15,000 to 80,000 g / mol.
  • polycarbonate resin a linear polycarbonate resin, a branched polycarbonate resin, or a mixture of linear and branched polycarbonate resins can be used without limitation.
  • Bisphenol-A polycarbonate resin may be used as the linear polycarbonate resin, but is not necessarily limited thereto.
  • the polycarbonate-based resin may be a branched chain, preferably 0.05 to 2 mol% of tri- or more polyfunctional compounds, such as trivalent or more, based on the total amount of diphenols used for polymerization. It can manufacture by adding the compound which has a phenol group.
  • the polycarbonate resin has a melt flow index (230 ° C./3 kg) of 5 to 25 g / 10 min, measured according to ASTM D1238.
  • the polycarbonate resin may be a mixture of two or more polycarbonate resins having different melt flow indices.
  • a mixture of polycarbonate resins having a measured melt flow index greater than 10 g / 10 min and less than 50 g / 10 min can be used.
  • a mixture of a polycarbonate resin having a melt flow index of 8 g / 10 min and a polycarbonate resin having a melt flow index of 19 g / 10 min may be used.
  • the polycarbonate-based resin may form a base resin together with an acrylic resin, and may be included in an amount of 50 to 90 wt% based on 100 wt% of the base resin. Preferably, it may be included in 55.56 to 88.89% by weight. If it is less than 50 wt%, impact resistance may be lowered, and if it is more than 90 wt%, scratch resistance may not be improved.
  • the acrylic resin has a melt flow index of 20 to 100 g / 10 min, measured under a temperature of 230 ° C. and a load of 3 kg according to ASTM D1238.
  • the acrylic resin is moved to the surface in the blend with the polycarbonate resin, it is later cured by a curing agent may exhibit excellent scratch resistance compared to the general polymethyl methacrylate.
  • the melt flow index is less than 20 g / 10min, acrylic resin may enter into the polycarbonate resin, and thus scratch resistance may be lowered.
  • the melt flow index is higher than 100 g / 10min, mechanical properties such as impact resistance may be reduced. Can be.
  • the acrylic resin may be composed of one or more homopolymers, copolymers or mixtures thereof selected from the group consisting of acrylic acid monomers, methacrylic acid monomers, acrylic acid alkylester monomers and methacrylic acid alkylester monomers. Preferably, it may be a methacrylic acid methyl ester monomer.
  • the acrylic acid alkyl ester monomer or the methacrylic acid alkyl ester monomer may be methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, phenyl methacrylate, benzyl methacrylate, cyclohexyl methacrylate, phenoxy methacrylate. , Phenoxyethyl methacrylate, methyl acrylate, ethyl acrylate, propyl acrylate and mixtures thereof, but is not necessarily limited thereto.
  • the acrylic acid alkyl ester monomer or methacrylic acid alkyl ester monomer may be used alone or as a mixture of two or more thereof.
  • Acrylic resins include poly acrylate or methacrylate, polymethyl acrylate or methacrylate, polyethyl acrylate or methacrylate, polypropyl acrylate or methacrylate, polybutyl acrylate or methacrylate, polypentyl acrylic Consisting of latex or methacrylate, polycyclohexyl acrylate or methacrylate, polyn-hexyl acrylate or methacrylate, polyglycidyl acrylate or methacrylate, poly acrylic acid or methacrylic acid and mixtures thereof Can be selected from the group.
  • polymethyl methacrylate resin can be used.
  • the acrylic resin may form a base resin together with a polycarbonate resin, and may be included in an amount of 10 to 50 wt% based on 100 wt% of the base resin. Preferably, it may be included in 11.11 to 44.44% by weight. If it is less than 10% by weight, it is difficult to obtain the desired scratch resistance, and if it is more than 50% by weight, impact resistance may be lowered.
  • the curing agent serves to cure the acrylic resin moved to the outside of the thermosetting resin composition to significantly improve scratch resistance.
  • the curing agent include benzoyl peroxide (BPO), dicumyl peroxide (DCP), di-tert-butyl peroxide (DTBP), azobisisobutylonitrile (AIBN), and the like. Can be used without limitation.
  • curing agent can use the hardening
  • the curing agent may be dicumyl peroxide.
  • the curing agent may be included in an amount of 1 to 15 parts by weight based on 100 parts by weight of the base resin including the polycarbonate resin and the acrylic resin. Preferably it may be included in 5 to 10 parts by weight. If it is less than 1 part by weight, sufficient scratch resistance cannot be obtained, and if it is more than 15 parts by weight, physical properties such as scratch resistance, impact resistance, and workability are lowered.
  • thermosetting resin composition according to the present invention may further include an impact reinforcing material, if necessary, manufactured by a method known to those skilled in the art to which the present invention belongs, or commercially available impact reinforcing material Can be used without limitation.
  • the impact modifier may be a rubber modified graft copolymer, an olefin copolymer or a mixture thereof.
  • the rubber-modified graft copolymer is styrene, alpha-methyl styrene, alkyl substituted styrene, acrylonitrile, methacrylonitrile, methyl methacrylate, maleic anhydride, alkyl or phenyl nucleosubstituted maleic acid which is capable of graft copolymerization to a rubbery polymer. It can be prepared by grafting one or more monomers selected from the group consisting of meads and mixtures thereof.
  • the rubber modified graft copolymer can be prepared by a conventional method.
  • the rubber content of the rubber-modified graphite copolymer is preferably 20 to 80% by weight.
  • the rubbery polymer may be selected from the group consisting of diene rubber, acrylic rubber, ethylene / propylene rubber, ethylene-propylene-diene terpolymer (EPDM), silicone rubber and mixtures thereof.
  • EPDM ethylene-propylene-diene terpolymer
  • a diene rubber can be used.
  • the diene rubber may include butadiene, isoprene, and the like, but is not limited thereto.
  • the acrylic rubber is a group consisting of methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, hexyl methacrylate, 2-ethylhexyl methacrylate and mixtures thereof It may be selected from, but is not necessarily limited thereto.
  • the silicone rubber may be prepared from cyclosiloxane, for example hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, trimethyltriphenylcyclotrisiloxane, tetramethyltetra It may be selected from the group consisting of phenylcyclotetrosiloxane, octaphenylcyclotetrasiloxane and mixtures thereof, but is not necessarily limited thereto.
  • Polyolefin rubbers such as ethylene / propylene rubber and ethylene-propylene-diene terpolymer (EPDM), can be used.
  • the olefin copolymer is a chlorinated polyethylene (CPE) copolymer or an ethylene-vinyl-acetate (EVA) copolymer, but is not necessarily limited thereto.
  • the impact modifier is preferably a rubber modified graft copolymer, more preferably graft acrylonitrile-butadiene-styrene (g-ABS) copolymer or methyl methacrylate-butadiene-styrene (MBS) resin.
  • g-ABS graft acrylonitrile-butadiene-styrene
  • MFS methyl methacrylate-butadiene-styrene
  • the impact reinforcing material may be included in an amount of 1 to 30 parts by weight based on 100 parts by weight of the base resin consisting of the polycarbonate resin and the acrylic resin. Preferably it may be included in 5 to 15 parts by weight. If it is less than 1 part by weight, a sufficient impact reinforcing effect cannot be obtained. If it is more than 30 parts by weight, physical properties such as scratch resistance, transparency, and workability are lowered.
  • thermosetting resin composition of this invention may further contain an additive according to each use.
  • the thermosetting resin composition is selected from the group consisting of flame retardants, flame retardant aids, lubricants, anti-drip additives, antioxidants, plasticizers, heat stabilizers, light stabilizers, compatibilizers, weather stabilizers, pigments, dyes, colorants, inorganic additives and mixtures thereof.
  • the additive may further include, but is not necessarily limited to.
  • the additive may be used in an amount of 10 parts by weight or less, preferably 0.0001 to 10 parts by weight, based on 100 parts by weight of the base resin including the polycarbonate resin and the acrylic resin.
  • thermosetting resin can be obtained by the manufacturing method of the said thermosetting resin.
  • the present invention includes a polycarbonate resin and an acrylic resin, and provides a thermosetting molded article having a crosslinking degree of acrylic resin of 50 to 95%.
  • the thermosetting molded article may include 50 to 90 parts by weight of the polycarbonate resin and 10 to 50 parts by weight of the acrylic resin. If the degree of crosslinking of the acrylic resin is less than 50%, scratch resistance may be lowered, and if it is more than 95%, optical properties may be lowered by phase separation.
  • the degree of crosslinking can be measured using the Flory-Rehner formula below by immersing the specimen to be measured for 24 hours in toluene, measuring the swollen volume of the specimen after immersion. After immersion, the swollen volume of the specimen can be measured by dividing the mass increase in the swollen material by the density of the solvent when the density of the solvent is known.
  • v 1 is the molar volume of the solvent
  • v 2 is the volume fraction of the swollen material
  • ⁇ 1 is the Flory-Huggins interaction parameter
  • n is the degree of crosslinking.
  • thermosetting resin composition according to the present invention is (a) extrude a polycarbonate resin and an acrylic resin having a melt flow index of 20 to 100 g / 10min measured at a temperature of 230 °C and a load of 3 kg in accordance with ASTM D1238 in an extruder Preparing a thermoplastic resin composition; (b) mixing the thermoplastic resin composition and a curing agent in an injection molding machine to prepare a step of injecting a thermosetting resin composition. A thermosetting molded article is molded from the thermosetting resin composition.
  • the curing agent When the curing agent is added in the manufacturing step of the thermoplastic resin composition, the curing agent is activated due to the heat generated during extrusion, and the acrylic resin is present in the form of particles in the polycarbonate resin, so that the scratch resistance of the thermosetting molded article cannot be improved.
  • the acrylic resin, the curing agent or both may be supplied to the side of the extruder, the injection machine or both.
  • 1 is a view schematically showing a manufacturing process of the thermosetting resin composition according to the present invention.
  • thermosetting acrylic resin is positioned on the outermost surface of the thermosetting molded article, thereby improving scratch resistance of the thermosetting molded article.
  • curing agent is thrown in during injection of the said thermosetting resin composition. 1, it can be seen that the curing agent is injected during the injection.
  • Thermosetting the thermosetting resin composition may be performed for a time of 5 to 20 minutes at a temperature of 40 to 80 °C. For example, curing the thermosetting resin composition may be performed at 60 ° C. for 10 minutes. Curing the thermosetting resin composition may proceed simultaneously with the step of injecting the thermosetting resin composition. In addition, the step of curing the thermosetting resin composition may be progressed by the temperature at the time of injection of the thermosetting resin composition.
  • thermosetting molded article of the present invention has a pencil hardness of 2H to 4H measured according to JIS K 5401.
  • the thermosetting molded article may be applied to various products because of excellent scratch resistance. It can be widely used in the manufacture of electrical and electronic housings such as TVs, audio, cell phones, digital cameras, navigation, washing machines, computers, monitors, MP3s, video players, CD players, washing machines and office automation equipment.
  • thermosetting molded article is the same as that described in the method of manufacturing the thermosetting resin and is omitted in order to avoid duplication.
  • (A) Polycarbonate resin melt with SC-1080 having a weight average molecular weight of 25,000 g / mol, bisphenol-A linear polycarbonate resin, and a melt flow index manufactured by Cheil Industries Co., Ltd. A mixture of SC-1190 with a flow index of 19 g / 10 min was used. The pencil hardness measured according to JIS K 5401 is 3B.
  • (B) Acrylic resin The polymethyl methacrylate resin was used.
  • a curing agent was prepared in the same manner as in Example 1 except that the curing agent was added to the extruder together with the polycarbonate resin.
  • Table 1 shows the mixing ratio of (A) and (B) in parts by weight relative to the base resin including (A) and (B), and (C) and (D) in parts by weight based on 100 parts by weight of the base resin. It is shown.
  • Table 1 shows that in Examples 1 to 5 using the components of the present invention, the pencil hardness increases from 2H to 4H according to the increase in the content of the polymethylmethacrylate resin, so that excellent scratch resistance can be obtained. Can be.
  • Comparative Example 1 using only polycarbonate resin, the impact strength is excellent, but scratch resistance is not good.
  • Comparative Example 2 using only polymethyl methacrylate resin, the scratch resistance is excellent but impact strength is not good. It can be seen that.
  • thermosetting molded article according to the present invention exhibits excellent scratch resistance compared to acrylic resin alone, despite being a blend of polycarbonate resin and acrylic resin.

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  • Chemical Kinetics & Catalysis (AREA)
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PCT/KR2012/010908 2011-12-29 2012-12-14 Procédé de préparation d'une résine thermodurcissable et produit moulé à base de celle-ci Ceased WO2013100452A1 (fr)

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KR20110145389 2011-12-29
KR10-2011-0145389 2011-12-29
KR10-2012-0145581 2012-12-13
KR1020120145581A KR101550199B1 (ko) 2011-12-29 2012-12-13 열경화성 수지의 제조방법 및 이의 성형품

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* Cited by examiner, † Cited by third party
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