US5543462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact resistant polystyrene composition
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1994-03-02
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Granted: 1996-08-06
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Expires: 2014-03-02
Abstract
Abstract The present invention relates to an impact resistant polystyrene composition which comprises an (A) styrenic polymer having syndiotactic configuration and a (B) rubbery elastomer modified by a modifier having a polar group, or to an impact resistant polystyrene composition which comprises the aforesaid composition and a (C) rubbery elastomer and/or a (D) poly(phenylene ether). The polystyrene compositions according to the present invention are excellent in heat resistance, modulus of elasticity, impact resistance and extensibility and thus are expected to find effective use for molding electric and electronic materials, industrial construction materials, automobile part, domestic electrical appliances, industrial materials such as various machine parts, etc.
Inventors
- 👤 Akihiko Okada
- 👤 Nobuyuki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:39
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L53/00; C08L53/02; C08L9/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
39 words
An impact resistant polystyrene composition which comprises 100 paths by weight of an (A) styrenic polymer having syndiotactic configuration and 1 to 100 parts by weight of a (B) rubbery elastomer modified by a modifier having a polar group.
Claim 2
Dependent Claim
39 words
An impact resistant polystyrene composition which comprises 100 paths by weight of an (A) styrenic polymer having syndiotactic configuration and 1 to 100 parts by weight of a (B) rubbery elastomer modified by a modifier having a polar group.
Claim 3
Dependent Claim
50 words
An impact resistant polystyrene composition which comprises 100 parts by weight of an (A) styrenic polymer having syndiotactic configuration, 1 to 100 parts by weight of a (B) rubbery elastomer modified by a modifier having a polar group and 1 to 100 parts by weight of a (C) rubbery elastomer.
Claim 4
Dependent Claim
50 words
An impact resistant polystyrene composition which comprises 100 parts by weight of an (A) styrenic polymer having syndiotactic configuration, 1 to 100 parts by weight of a (B) rubbery elastomer modified by a modifier having a polar group and 1 to 100 parts by weight of a (C) rubbery elastomer.
Claim 5
Dependent Claim
50 words
An impact resistant polystyrene composition which comprises 100 parts by weight of an (A) styrenic polymer having syndiotactic configuration, 1 to 100 parts by weight of a (B) rubbery elastomer modified by a modifier having a polar group and 0.1 to 5 parts by weight of a (D) poly(phenylene ether).
Claim 6
Dependent Claim
50 words
An impact resistant polystyrene composition which comprises 100 parts by weight of an (A) styrenic polymer having syndiotactic configuration, 1 to 100 parts by weight of a (B) rubbery elastomer modified by a modifier having a polar group and 0.1 to 5 parts by weight of a (D) poly(phenylene ether).
Claim 7
Dependent Claim
61 words
An impact resistant polystyrene composition which comprises 100 parts by weight of an (A) styrenic polymer having syndiotactic configuration, 1 to 100 parts by weight of a (B) rubbery elastomer modified by a modifier having a polar group, 1 to 100 parts by weight of a (C) rubbery elastomer and 0.1 to 5 parts by weight of a (D) poly(phenylene ether).
Claim 8
Dependent Claim
61 words
An impact resistant polystyrene composition which comprises 100 parts by weight of an (A) styrenic polymer having syndiotactic configuration, 1 to 100 parts by weight of a (B) rubbery elastomer modified by a modifier having a polar group, 1 to 100 parts by weight of a (C) rubbery elastomer and 0.1 to 5 parts by weight of a (D) poly(phenylene ether).
Claim 9
Dependent Claim
39 words
The impact resistant polystyrene composition according to any one of claims 1 to 4 wherein the rubbery elastomer having a polar group as the component (B) is a rubbery elastomer modified by a modifier having a maleic anhydride group.
Claim 10
Dependent Claim
38 words
The impact resistant polystyrene composition according to any one of claims 1 to 4 wherein the rubbery elastomer modified by a modifier having a polar group as the component (B) is a rubbery elastomer having an epoxy group.
Claim 11
Dependent Claim
40 words
The impact resistant polystyrene composition according to any one of claims 1 to 4 wherein the rubbery elastomer modified by a modifier having a polar group as the component (B) is a hydrogenated styrene/butadiene/styrene copolymer rubber having an epoxy group.
Claim 12
Dependent Claim
23 words
The impact resistant polystyrene composition according to claim 2 wherein the rubbery elastomer as the component (C) is a hydrogenated styrene/butadiene/styrene copolymer rubber.
Claim 13
Dependent Claim
23 words
The impact resistant polystyrene composition according to claim 4 wherein the rubbery elastomer as the component (C) is a hydrogenated styrene/butadiene/styrene copolymer rubber.
Claim 14
Dependent Claim
36 words
The impact resistant polystyrene composition according to any one of claim 1 to 4, wherein said rubbery elastomer modified by a modifier is selected from the group consisting of SEBS, SBR and SBS, and mixtures thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |