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EP0318793A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Styrene-based resin composition

Assignee: Idemitsu Kosan Co Ltd
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Filing: 1988-11-22
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Granted: —
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Expires: 2008-11-22
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Abstract

Abstract A styrene-based resin composition containing (A) a styrene-based resin having mainly syndiotactic configuration and (8) a rubber-like polymer, or further (C) an inorganic filler. The rubber-like polymer (B) includes, for example, (I) polymers produced by polymerizing vinyl monomers in the presence of polymers obtained through polymerization of one or more monomers selected from the group consisting of alkyl acrylate, alkyl methacrylate and polyfunctional monomers having conjugated diene-type double bonds, (II) block or graft copolymers selected from an a - b type block copolymer, an a - b - a type block copolymer, a b - a - b type block copolymer, an a grafted b copolymer and a b grafted a copolymer and (III) natural or synthetic rubber. The present composition is excellent in heat resistance and further in other physical properties such as impact resistance, stiffness and so on.

Inventors

  • 👤 Toshikazu Ijitsu
  • 👤 Takashi Sumitomo
  • 👤 Michihiro Sawada
  • 👤 Keisuke Funaki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 15:03
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L25/16; C08L21/00; C08L23/00; C08L23/02; C08L53/00; C08L53/02; C08L71/00; C08L71/08; C08L71/10; C08L71/12

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 21 words
A styrene-based resin composition containing (A) a styrene-based resin with mainly syndiotactic configuration and (B) a rubber-like polymer as main components.
Claim 2
Dependent Claim 21 words
A styrene-based resin composition containing (A) a styrene-based resin with mainly syndiotactic configuration and (B) a rubber-like polymer as main components.
Claim 3
Dependent Claim 29 words
The composition as claimed in Claim 1, comprising 65 to 99% by weight of the styrene-based resin (A) and 35 to 1% by weight of the rubber-like polymer (B).
Claim 4
Dependent Claim 51 words
The composition as claimed in Claim 1 wherein the rubber-like polymer (B) is a polymer produced by polymerizing vinyl monomers in the presence of polymers obtained through polymerization of one or more monomers selected from the group consisting of alkyl acrylate, alkyl methacrylate and polyfunctional monomers having conjugated diene-type double bonds.
Claim 5
Dependent Claim 96 words
The composition as claimed in Claim 1 wherein the rubber-like polymer (B) is at least one block or graft copolymer selected from an a - b type block copolymer, an a - b - a type block copolymer, a b - a - b type block copolymer, an a grafted b copolymer and a b grafted a copolymer ; wherein a is atactic polystyrene, and b is at least one polymer selected from conjugated diene, hydrogenated product of conjugated diene, conjugated diene modified with acid anhydride and hydrogenated product of conjugated diene modified with acid anhydride.
Claim 6
Dependent Claim 27 words
The composition as claimed in any of Claims 1 to 4 wherein the volume average particle diameter of the rubber-­like polymer (B) is 0.1 to 4 µm.
Claim 7
Dependent Claim 22 words
A styrene-based resin composition containing (A) a styrene-based resin having mainly syndiotactic configuration, (B) a rubber-like polymer and (C) an inorganic filler.
Claim 8
Dependent Claim 22 words
A styrene-based resin composition containing (A) a styrene-based resin having mainly syndiotactic configuration, (B) a rubber-like polymer and (C) an inorganic filler.
Claim 9
Dependent Claim 39 words
The composition as claimed in Claim 6, comprising 1 to 98% by weight of the styrene-based polymer (A), 1 to 98% by weight of the rubber-like polymer (B), and 1 to 60% by weight of the inorganic filler (C).
Claim 10
Dependent Claim 23 words
The composition as claimed in Claim 6 wherein the volume average particle diameter of the rubber-like polymer (B) is 0.1 to 4 µm.

References Cited (Backward Citations)

DE1297328B Cited
FR2259874A1 Cited
FR2311645A1 Cited

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