USH916H - Thermoplastic resin composition - Google Patents

Thermoplastic resin composition Download PDF

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Publication number
USH916H
USH916H US07/378,766 US37876689A USH916H US H916 H USH916 H US H916H US 37876689 A US37876689 A US 37876689A US H916 H USH916 H US H916H
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US
United States
Prior art keywords
group
weight
copolymer
resin composition
graft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US07/378,766
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English (en)
Inventor
Kozi Nishida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Chemical Corp
Original Assignee
Mitsubishi Rayon Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Rayon Co Ltd filed Critical Mitsubishi Rayon Co Ltd
Assigned to MITSUBISHI RAYON COMPANY LIMITED, 3-19, KYOBASHI 2-CHOME, CHUO-KU, TOKYO, JAPAN reassignment MITSUBISHI RAYON COMPANY LIMITED, 3-19, KYOBASHI 2-CHOME, CHUO-KU, TOKYO, JAPAN ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: NISHIDA, KOZI
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Publication of USH916H publication Critical patent/USH916H/en
Abandoned legal-status Critical Current

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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
    • 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
    • C08L33/24—Homopolymers or copolymers of amides or imides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers

Definitions

  • This invention relates to a thermoplastic resin composition which has a high heat distortion temperature along with excellent impact resistance and moldability.
  • the methacrylimide group-containing polymer is known as a thermoplastic resin polymer with excellent properties in heat resistance and transparency (U.S. Pat. No. 4,246,374).
  • its application as a molding material is considerably restricted due to inferior mechanical properties including impact strength.
  • the impact strength obtained by the methods [1] and [3] mentioned above are still insufficient. Namely, it is necessary to blend the impact modifier in a large quantity to secure a higher impact strength. This, however, sacrifices the heat resistance inherent to the methacrylimide group-containing polymer as well as its fluidity in molding. On the other hand, the method [2] which intends to improve the impact strength while retaining the molding fluidity fails to produce the intended effects to a sufficient degree because the methacrylimide group-containing polymer has low compatibility with polycarbonate by nature.
  • thermoplastic resin composition comprising:
  • thermoplastic elastomer selected from the group consisting of polyether ester, polyether ester amide and polyether amide;
  • the methacrylimide group-containing polymer in the present invention it is useful to employ a method of reacting a methacrylic resin and ammonia or a primary amine (hereinafter ammonia and primary amine will be referred to as "an imidizing agent" for brevity) under an inert gas atmosphere and in an inert solvent at a temperature of 180°-350° C., preferably at a temperature of 200°-330° C.
  • Nitrogen gas is useful as the inert gas, and the inert solvent is preferred to be a solvent or a mixture of two or more solvents, which is capable of dissolving the methacrylic resin of the starting material and the methacrylimide group-containing polymer to be produced.
  • useful solvents include aromatic hydrocarbons such as benzene, toluene and xylene, and aliphatic alcohols such as methanol, ethanol and propanol.
  • R 1 is a hydrogen atom or a substituted or non-substituted alkyl group having 1-20 carbon atoms, cycloalkyl group, aryl group, alkaryl group or an aralkyl group or allyl group.
  • a hydrogen atom, a methyl group, an ethyl group, a t-butyl group, a cyclohexyl group and a phenyl group are preferred.
  • the imidizing agent for obtaining the imide ring structural unit include ammonia, methylamine, ethylamine, t-butylamine and cyclohexylamine.
  • the methacrylimide group-containing polymer in the present invention should contain at least 5% by weight of the imide ring structural unit, preferably in a proportion greater than 20% by weight. When the content of the imide ring structural unit content is less than 5% by weight, heat resistance of the imide polymer is low.
  • methacrylic resins useful in the present invention for the preparation of the methacrylimide group-containing polymer include homopolymer of methyl methacrylate, and copolymers of methyl methacrylate and other methacrylic acid esters, acrylic acid esters, styrene, ⁇ -methylstyrene and acrylonitrile.
  • methacrylic acid esters examples include ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, cyclohexyl methacrylate and benzyl methacrylate.
  • acrylic acid esters examples include methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate, cyclohexyl acrylate and benzyl acrylate.
  • methyl methacrylate homopolymer methyl methacrylate-methyl acrylate copolymer, methyl methacrylate-styrene copolymer are especially preferred.
  • the content of methyl methacrylate in these copolymers is preferred to be greater than 70% by weight.
  • the content of the methacrylimide group-containing polymer in the thermoplastic resin composition according to the present invention is in the range of 20-95% by weight. If its content is smaller than 20% by weight, it becomes difficult to produce a resin composition with excellent heat resistance. Conversely, if greater than 95% by weight, the resulting resin composition is not expected to have excellent mechanical properties.
  • the thermoplastic elastomer to be used in the present invention includes at least one thermoplastic elastomer selected from the group consisting of polyether ester, polyether ester amide and polyether amide, of which polyether ester is especially preferable.
  • the "polyether ester” preferably used includes a block copolymer containing polyester with a number average molecular weight of 1,000-60,000 having more than 80 mol % of its repetitive unit constituted by an alkylene terephthalate unit as a hard segment, and poly (alkyleneoxide) glycol with a number average molecular weight of 400-6,000 having more than 80 mol % of its repetitive unit constituted by an alkylene oxide unit as a soft segment.
  • the content of the poly (alkyleneoxide) glycol component in the block-copolymer is preferably in the range of 1-85% by weight, more preferably in the range of 5-50% by weight.
  • the polyether ester block-copolymers include polyethylene terephthalate-polyethylene oxide block-copolymer, polyethylene terephthalate-polytetramethylene oxide block-copolymer, polytetramethylene terephthalate-polyethylene oxide block-copolymer, and polytetramethylene terephthalate-polytetramethylene oxide block-copolymer.
  • polyether ester amide and “polyether amide” include block-copolymers which contain polyether as a soft segment and polyester amide or polyamide as a hard segment, which can be produced by known processes (Laid-Open Japanese Patent Application 59-49252).
  • the content of the thermoplastic elastomer in the thermoplastic resin composition according to the present invention should be in the range of 2.5-30% by weight because it becomes difficult to obtain a resin composition with the excellent mechanical properties when its content is smaller than 2.5% by weight. When its content is greater than 30% by weight, a difficulty is encountered in obtaining a resin composition which is excellent in balance of the mechanical properties and the heat resistance.
  • the graft-copolymer useful in the present invention is a graft-copolymer which is produced by graft-polymerizing at least one monomer selected from the group consisting of cyanated vinyl monomer, aromatic vinyl monomer and acrylic vinyl monomer to a butadiene rubber.
  • graft-copolymers include acrylonitrile-butadiene-styrene copolymer (ABS resin), methyl methacrylate-butadiene-styrene copolymer (MBS resin) and graft-copolymers of acrylonitrile and styrene to ethylene-propylene-diene rubber (AES resin).
  • the content of the above-described graft-copolymer in the thermoplastic resin composition of the invention is in the range of 2.5-50% by weight. If its content is less than 2.5% by weight, production of a resin composition with excellent mechanical properties becomes difficult, and, if in excess of 50% by weight, it is difficult to obtain a resin composition which has excellent balance in the heat resistance and mechanical properties.
  • thermoplastic resin composition of the present invention may be admixed with other polymers for the purpose of adjusting the resin composition to secure desired properties.
  • the methacrylimide group-containing polymer (A), thermoplastic elastomer (B) and graft-copolymer (C) can be blended by melting and mixing the respective components with granular, powdery or chip shape in a V-type blender, super mixer or kneader, and then molding them.
  • thermoplastic resin composition of the present invention may be added with a heat stabilizer, an antioxidant, an ultraviolet ray absorbent or the like. Further, a plasticizer, a pigment, a lubricant or the like may be blended into the composition if desired. Fibrous material such as glass fibers and carbon fibers may also be added for the purpose of reinforcement.
  • thermoplastic resin composition of the present invention can be formed into articles of various shapes by compression molding, injection molding, extrusion molding or other known plastics molding processes.
  • the heat distortion temperature was measured according to ASTM D648 (load: 18.6 kg/cm 2 ).
  • melt index was determined according to ASTM D1238 (grams for 10 minutes at 260° C. under a load of 10 kg).
  • the imidizing degree (mol %) of the methacrylimide group-containing polymer was measured from the nitrogen content obtained from the elementary analysis (using a CHN corder (MT-3), a product of Yanagimoto Seisakusho K.K.) and from the measurement by proton NMR JNM-FX-100 (JEOL) spectrometer at 100 MHz.
  • the intrinsic viscosity of the polymer was determined by measuring the flow time (ts) of sample polymer solutions in chloroform in different polymer concentration and the flow time (to) of chloroform at the temperature of 25° C. ⁇ 0.1° C. with use of Deereax-Bishoff viscometer, calculating the relative viscosity ⁇ rel of the polymer from the value of ts/to, and calculating the value of intrinsic viscosity according to the following formula. ##EQU1## (wherein C is the grams of the polymer per 100 ml of solvent.)
  • Table 1 below shows the results of measurements of the imidization degree and heat distortion temperatures of the polymers A-1 and A-2.
  • thermoplastic elastomer (Elastomers were prepared in accordance with Examples of Laid-Open Japanese Patent Application 59-49252)
  • ABS resin acrilonitrile-butadiene-styrene copolymer
  • polybutadiene latex (with solid content of 50%, average particle size of 0.35 ⁇ and gel content of 90%), 1 part of sodium stearate, 0.1 part of sodium formaldehyde sulfoxylate, 0.03 parts of tetrasodium ethylenediaminetetraacetic acid, 0.003 parts of ferrous sulfate and 200 parts of water were charged into a reactor, and heated to 65° C., then adding, continuously over a time length of 4 hours, 60 parts of a monomer mixture consisting of 30% of acrylonitrile and 70% of styrene, 0.3 parts of t-dodecylmercaptan and 0.2 parts of cumene hydroperoxide.
  • the polymerization was conducted at 65° C. for 2 hours. Polymerization degree was 96%.
  • the latex was coagulated with sulfuric acid, and washed with water and dried to obtain a powdery acrylonitrile-butadiene-styrene copolymer.
  • the methacrylimide group-containing polymers A-1 and A-2 prepared in Referential Examples A, the thermoplastic elastomers B-1 to B-3 prepared in Referential Examples B, and the graft-copolymers C-1 and C-2 prepared in Referential Examples C were blended in the proportions as indicated in Table 2, and each one of the resulting resin compositions was melted and extruded into pellets by an extruder. The pellets were molded by injection molding to obtain specimens for measurement of physical properties. The results of the measurement of physical properties of these specimens are also shown in Table 2.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
US07/378,766 1988-07-29 1989-07-12 Thermoplastic resin composition Abandoned USH916H (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63191566A JPH0241352A (ja) 1988-07-29 1988-07-29 熱可塑性樹脂組成物
JP63-191566 1988-07-29

Publications (1)

Publication Number Publication Date
USH916H true USH916H (en) 1991-05-07

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ID=16276802

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/378,766 Abandoned USH916H (en) 1988-07-29 1989-07-12 Thermoplastic resin composition

Country Status (4)

Country Link
US (1) USH916H (ja)
EP (1) EP0352624B1 (ja)
JP (1) JPH0241352A (ja)
DE (1) DE68912220T2 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090180806A1 (en) * 2006-09-13 2009-07-16 Tadayuki Oshima Conductive member, process cartridge, and image forming apparatus
CN103183960A (zh) * 2011-12-29 2013-07-03 纳幕尔杜邦公司 热塑性弹性体组合物

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69108797T2 (de) * 1990-06-27 1995-10-19 Sumitomo Chemical Co Thermoplastische Harzzusammensetzungen.
US5217795A (en) * 1991-08-13 1993-06-08 Kimberly-Clark Corporation Polymeric web compositions having improved alkaline solubility for use as fibers
DE4208916A1 (de) * 1992-03-20 1993-09-23 Akzo Nv Polyesterfaser und verfahren zu deren herstellung
EP0985704B1 (en) * 1998-09-11 2003-11-05 Mitsui Chemicals, Inc. Nitrile resin composition

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2146209A (en) 1936-07-31 1939-02-07 Du Pont Preparation of resinous imides of substituted acrylic acids
US4246374A (en) 1979-04-23 1981-01-20 Rohm And Haas Company Imidized acrylic polymers
US4500679A (en) 1982-08-09 1985-02-19 Monsanto Company Polyblends of thermoplastic copolyetheresters styrene-maleic anhydride polymers, and acrylonitrile-butadiene-styrene polymers
US4727117A (en) 1985-08-27 1988-02-23 Rohm And Haas Company Imide polymers
US4745159A (en) 1986-01-23 1988-05-17 Mitsubishi Rayon Co., Ltd. Methacrylate resin composition and process for its preparation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2146209A (en) 1936-07-31 1939-02-07 Du Pont Preparation of resinous imides of substituted acrylic acids
US4246374A (en) 1979-04-23 1981-01-20 Rohm And Haas Company Imidized acrylic polymers
US4500679A (en) 1982-08-09 1985-02-19 Monsanto Company Polyblends of thermoplastic copolyetheresters styrene-maleic anhydride polymers, and acrylonitrile-butadiene-styrene polymers
US4727117A (en) 1985-08-27 1988-02-23 Rohm And Haas Company Imide polymers
US4745159A (en) 1986-01-23 1988-05-17 Mitsubishi Rayon Co., Ltd. Methacrylate resin composition and process for its preparation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090180806A1 (en) * 2006-09-13 2009-07-16 Tadayuki Oshima Conductive member, process cartridge, and image forming apparatus
US8133161B2 (en) * 2006-09-13 2012-03-13 Ricoh Company, Ltd. Conductive member, process cartridge, and image forming apparatus
CN103183960A (zh) * 2011-12-29 2013-07-03 纳幕尔杜邦公司 热塑性弹性体组合物
US9206316B2 (en) 2011-12-29 2015-12-08 E I Du Pont De Nemours And Company Thermoplastic elastomer compositions
CN103183960B (zh) * 2011-12-29 2016-03-30 纳幕尔杜邦公司 热塑性弹性体组合物

Also Published As

Publication number Publication date
EP0352624B1 (en) 1994-01-12
DE68912220T2 (de) 1994-05-11
DE68912220D1 (de) 1994-02-24
EP0352624A2 (en) 1990-01-31
JPH0241352A (ja) 1990-02-09
EP0352624A3 (en) 1991-08-21

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Owner name: MITSUBISHI RAYON COMPANY LIMITED, 3-19, KYOBASHI 2

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:NISHIDA, KOZI;REEL/FRAME:005101/0265

Effective date: 19890515

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