Thermoplastic resin composition

• US 5,079,295 A
• Filed: 08/15/1989
• Issued: 01/07/1992
• Est. Priority Date: 08/24/1988
• Status: Expired due to Fees

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: Maruyama, Takeshi, Furuta, Motonobu
• Primary Examiner(s): Ziegler, Jacob
• Application Number:
  US07/393,791
• Time in Patent Office: 875 Days
• Field of Search: 525/68, 525/92, 525/905, 525/148, 525/152
• US Class Current: 525/68
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/22 Macromolecular compounds not provided for in C08L2666/16 - C08L2666/20
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 51/06 grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• CPC Class Codes: C08L 59/00 Compositions of polyacetals; Compositions of derivatives of polyacetals of polyvinyl acetals C08L29/14
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• CPC Class Codes: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• CPC Class Codes: C08L 71/00 Compositions of polyethers obtained by reactions forming an ether link in the main chain of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 71/123 not modified by chemical after-treatment
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
• CPC Class Codes: C08L 81/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: Y10S 525/905 Polyphenylene oxide

Abstract

A thermoplastic resin composition having excellent heat resistance and impact resistance as well as having excellent rigidity, chemical resistance and processibility, comprising:

(a) a polyphenylene ether resin or a resin composition containing a polyphenylene ether,

(b)

(i) a modified propylene polymer grafted with a styrene-based monomer and an unsaturated carboxylic acid or its derivative, or

(ii) a propylene-based resin composition containing the modified propylene polymer and a propylene polymer, and

(c) a rubbery substance. The thermoplastic resin compositions not only have good mold-processibility but also exhibit well-balanced physical properties when molded into articles.

Claims

1. A thermoplastic resin composition comprising:

(a) a polyphenylene ether resin or a resin composition containing a polyphenylene ether,

(b)

(i) a modified propylene polymer grafted with a styrene-based monomer and an unsaturated carboxylic acid or its derivative, or

(ii) a propylene-based resin composition containing the modified propylene polymer and a propylene polymer, and

(c) a rubbery substance.

2. A thermoplastic resin composition as claimed in claim 1, wherein the proportion of the component (a) to the sum of the components (a) and (b) is 1 to 90% by weight, and the proportion of the component (b) to the sum of the components (a) and (b) is 99 to 10% by weight, and wherein the proportion of the component (c) to the sum of the components (a) and (b) is 1 to 50 parts by weight per 100 parts by weight of the sum of the components (a) and (b).

3. A thermoplastic resin composition as claimed in claim 1, wherein the modified propylene polymer as the component (b) is a modified propylene polymer comprising 0.2 to 150 parts by weight, per 100 parts by weight of the propylene polymer, of a graft monomer composed of 99 to 1% by weight of the styrene-based monomer and 1 to 99% by weight of the unsaturated carboxylic acid, its derivative or mixture thereof and attached to the propylene polymer by graft copolymerization.

4. A thermoplastic resin composition as claimed in claim 1, wherein the modified propylene polymer as the component (b) is (i) a modified propylene polymer grafted with the styrene-based monomer, glycidyl methacrylate, glycidyl acrylate or mixture thereof, or (ii) a propylene-based resin composition containing the modified propylene polymer and the propylene polymer.

5. A thermoplastic resin composition as claimed in claim 1, wherein the component (c) is a rubbery substance graft-copolymerized with the styrene-based monomer.

6. A thermoplastic resin composition as claimed in claim 1, wherein the component (c) is an ethylene-α

-olefin copolymer rubber.

7. A thermoplastic resin composition as claimed in claim 6, wherein the ethylene-α

-olefin copolymer rubber is an ethylene-α

-olefin copolymer rubber having an ethylene content of 15 to 85% by weight, a Mooney viscosity (ML₁₊₄, 121°

C.) of 5 to 120, and a glass transition temperature of not higher than -10°

C.

8. A thermoplastic resin composition as claimed in claim 1, wherein the component (c) is an epoxy group-containing copolymer.

9. A thermoplastic resin composition as claimed in claim 1, wherein the polyphenylene ether used as the component (a) is a polyphenylene ether obtainable by oxidative coupling polymerization of at least one phenol compound represented by the general formula (1) ##STR10## wherein R₁, R₂, R₃, R₄ and R₅ each represents a hydrogen atom, a halogen atom, a hydrocarbon group or a substituted hydrocarbon group, provided that one of R₁, R₂, R₃, R₄ and R₅ is a hydrogen atom.

10. An automotive part made from the thermoplastic resin composition claimed in any one of claims 1 to 4.

11. An automotive part as claimed in claim 10 which is selected from the group consisting of a bumper, instrument panel, fender, trim, door panel, wheel cover, side protector, garnish, trunk lid, bonnet and roof.