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US4424303A
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Composition of an aromatic carbonate polymer, a styrene-butadiene styrene radial black copolymer and an acrylate copolymer
Assignee: General Electric Co
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Filing: 1982-02-25
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Granted: 1984-01-03
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Expires: 2002-02-25
Abstract
Abstract A composition comprising an aromatic polycarbonate, a styrene-butadiene-styrene radial block copolymer and an acrylate copolymer useful in molded articles.
Inventors
- 👤 Ping Y. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:34
CPC Classifications
C; C08; C08L; C08L69/00; Y; Y10; Y10S; Y10S525/00; Y10S525/901; Y10S525/902
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A composition which comprises in admixture a. a major amount of an aromatic carbonate polymer, b. an acrylate copolymer comprising a copolymper of an alkyl acrylate and an alkyl methacrylate, each of the said alkyl having independently one to five carbon atoms, inclusive, and c. a styrene-butadiene-styrene radial block copolymer present in from about three to about twenty-five weight percent of the total composition of a+b+c.
Claim 2
Dependent Claim
66 words
A composition which comprises in admixture a. a major amount of an aromatic carbonate polymer, b. an acrylate copolymer comprising a copolymper of an alkyl acrylate and an alkyl methacrylate, each of the said alkyl having independently one to five carbon atoms, inclusive, and c. a styrene-butadiene-styrene radial block copolymer present in from about three to about twenty-five weight percent of the total composition of a+b+c.
Claim 3
Dependent Claim
24 words
A composition in accordance with claim 1 wherein the acrylate copolymer is from about two to about twenty weight percent of the total composition.
Claim 4
Dependent Claim
20 words
A composition in accordance with claim 2 wherein the styrene-butadiene-styrene copolymer is from about four to about twelve weight percent.
Claim 5
Dependent Claim
20 words
A composition in accordance with claim 3 wherein the acrylate copolymer is from about two to about fifteen weight percent.
Claim 6
Dependent Claim
66 words
A composition in accordance with claim 4 wherein the acrylate copolymer is a multiphase composite interpolymer comprising about 25 to 95 weight percent of a first elastomeric phase polymerized from a monomer system comprising about 75 to 99.8 percent by weight of a C 1-5 alkyl acrylate, a crosslinking monomer, a graftlinking monomer and about 75 to 5 weight percent of a final rigid thermoplastic phase.
Claim 7
Dependent Claim
28 words
A composition in accordance with claim 5 wherein the aromatic carbonate polymer is a homopolymer and the styrene-butadiene-styrene copolymer is from about three to about 12 weight percent.
Claim 8
Dependent Claim
14 words
A composition in accordance with claim 6 wherein the homopolymer is derived from bisphenol-A.
Claim 9
Dependent Claim
28 words
A composition in accordance with claim 7 wherein the monomer system of the elastomeric phase is n-butyl acrylate and the final rigid thermoplastic phase is derived from methylmethacrylate.
Claim 10
Dependent Claim
21 words
A composition in accordance with claim 8 wherein the weight ratio of n-butyl acrylate to methylmethacrylate is about 4 to 1.
Claim 11
Dependent Claim
25 words
A composition in accordance with claim 3 wherein the styrene-butadiene-styrene radial block copolymer contains about 15-50 weight percent styrene and about 50-85 weight percent butadiene.
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) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |