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Adhesives and Rubbers

Thermoplastic-elastomer-composition

Compositions of modified carbon products and amphiphilic ions and methods of using the same

What is claimed is: 1. A composition comprising a) an amphiphilic ion and b) a modified carbon ...

Process for crosslinking

We claim: 1. A process for crosslinking comprising (a) introducing into a reactor, under ...

Rubber composition and tire having tread thereof

What is claimed is: 1. A tire having a tread of a rubber composition comprised of the product of ...

Non-aqueous inks and coatings containing modified carbon products

The claimed invention is: 1. A non-aqueous coating composition comprising a non-aqueous solvent and ...

Powder coating compositions and method

OF THE PREFERRED EMBODIMENTS A powder coating composition of the present invention, after ...

Superabsorbent resin composition

What is claimed is: 1. A superabsorbent resin composition comprising components (A) and (D) wherein ...

Blends based on vinyl aromatic polymers with enhanced mechanical characteristics

We claim: 1. A blend based on vinyl aromatic polymers endowed with high mechanical properties even ...

Thermoformable, chemical resistant polymer blends

We claim: 1. A thermoformable polymer blend that is resistant to the solvent effects of halogenated ...

Thermoformable, chemical resistant polymer blends

OF THE INVENTION Suitable monovinylidene aromatic polymers comprise polymers containing ...

Plasticizied .alpha.-olefin/vinylidene aromatic monomer of hindered aliphatic or cycloaliphatic vinylidene monomer interpolymers

OF THE INVENTION The term "interpolymer" is used herein to indicate a polymer wherein at least two ...

Thermoplastic elastomer composition

Details

Inventors: Hikasa, Tadashi; Ibuki, Koichiro; Hamanaka, Tatsuo; Fukuyama, Masahiro;
Assignee: Sumitomo Chemical Company, Limited (Osaka, JP)
Primary Examiner: Securro; Carman J.
Assistant Examiner:
Attorney, Agent or Firm: Cushman, Darby & Cushman

The present invention provides a thermoplastic elastomer composition excellent in oil resistance. This composition comprises a partially crosslinked mixture of (A) an ethylene copolymer rubber comprising ethylene and an acrylate ester or a methacrylate ester and (B) an olefin polymer and, if necessary, (C) an olefin copolymer rubber.

DETAILED DESCRIPTION We claim: 1.
A thermoplastic elastomer composition which comprises a partially crosslinked mixture of (A) an ethylene copolymer rubber comprising ethylene and an acrylate ester or a methacrylate ester, at least one olefin polymer selected from a polypropylene and a propylene/.
alpha.
-olefin copolymer, and (C) an .
alpha.
-olefin copolymer rubber which is either (i) ethylene.
alpha.
- olefin copolymer rubber or (ii) ethylene.
alpha.
-olefin/nonconjugated diene copolymer rubber, wherein molar ratio of said ethylene to said acrylate ester of methacrylate ester in the ethylene copolymer rubber (A) is 50-85:50:15.
2.
A composition according to claim 1 wherein content of ethylene copolymer rubber (A) is 5-90% by weight, that of olefin polymer (B) is 5-60% by weight and that of olefin copolymer rubber (C) is 5-85% by weight.
3.
A composition according to claim 1 wherein the ethylene copolymer rubber (A) additionally contains at least one of unsaturated glycidyl ester, acid anhydride and unsaturated compound containing carboxylic acid group.
4.
A composition according to claim 1 wherein the ethylene copolymer rubber (A) additionally contains other comonomers copolymerizable with ethylene.
5.
A composition according to claim 1 wherein the olefin copolymer rubber (C) is an ethylene-propylene-non-conjugated diene rubber.
6.
A composition according to claim 1 wherein the olefin copolymer rubber (C) is an oil-extended olefin copolymer rubber containing 150 parts by weight or less of a mineral oil type softening agent per 100 parts by weight of the olefin copolymer rubber.
7.
A process for producing a thermoplastic elastomer composition which comprises mixing (A) an ethylene copolymer rubber comprising ethylene and an acrylate ester or a methacrylate ester, (B) at least one olefin polymer selected from a polypropylene and a propylene.
alpha.
-olefin copolymer, and (C) an olefin copolymer rubber which is either (i) ethylene.
alpha.
-olefin copolymer rubber or (ii) ethylene.
alpha.
-olefin/nonconjugated diene copolymer rubber and an organic peroxide, and dynamically heat-treating the mixture, wherein molar ratio of said ethylene to said acrylatae ester or methacrylate ester in the ethylene copolymer ruber (a) is 50-85:50-15

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