US4739001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber-modified styrene resin composition
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1986-12-18
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Granted: 1988-04-19
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Expires: 2006-12-18
Abstract
Abstract A rubber-modified styrene resin composition is disclosed, comprising (A) a rubber-modified styrene resin having dispersed therein from 1 to 15% by weight of a rubbery polymer having an average particle size of from 0.1 to 2.5 mu m, (B) an organopolysiloxane in an amount of from 0.01 to 0.2% by weight on silicon conversion based on the rubber-modified styrene resin, and (C) an ethylene-unsaturated carboxylic acid ester copolymer in an amount of from 0.05 to 10% by weight based on the rubber-modified styrene resin. The composition exhibits markedly improved areal impact strength while retaining other physical properties and is, therefore, useful for exterior parts.
Inventors
- 👤 Yasushi Okamoto
- 👤 Yoshinori Kanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:07
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/062; C08L51/00; C08L51/04; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A rubber-grafted styrene resin composition comprising (A) a rubber-grafted styrene resin having dispersed therein from 1 to 15 wt% by weight of a rubbery polymer having an average particle size of from 0.1 to 2.5 μm, (B) an organopolysiloxane in an amount of from 0.01 to 0.2% by weight on silicon conversion based on the rubber-modified styrene resin, and (C) an ethylene-unsaturated carboxylic acid ester copolymer having an unsaturated carboxylic acid content of from 5 to 45% by weight in an amount of from 0.05 to 10% by weight based on the rubber-modified styrene resin.
Claim 2
Dependent Claim
95 words
A rubber-grafted styrene resin composition comprising (A) a rubber-grafted styrene resin having dispersed therein from 1 to 15 wt% by weight of a rubbery polymer having an average particle size of from 0.1 to 2.5 μm, (B) an organopolysiloxane in an amount of from 0.01 to 0.2% by weight on silicon conversion based on the rubber-modified styrene resin, and (C) an ethylene-unsaturated carboxylic acid ester copolymer having an unsaturated carboxylic acid content of from 5 to 45% by weight in an amount of from 0.05 to 10% by weight based on the rubber-modified styrene resin.
Claim 3
Dependent Claim
19 words
A rubber-grafted styrene resin composition as in claim 1, wherein said rubber-grafted styrene resin is a rubber-grafted polystyrene resin.
Claim 4
Dependent Claim
34 words
A rubber-grafted styrene resin composition as in claim 1, wherein said ethylene-unsaturated carboxylic acid ester copolymer (C) is an ethylene-ethyl acrylate copolymer, an ethylene-methyl acrylate copolymer, an ethylene-ethyl methacrylate copolymer, or a mixture thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |