Patent US4145381A successfully refreshed from Google Patents.
US4145381A
Expired / Lapsed
US
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Thermoplastic graft copolymers
Assignee: Owens Corning
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Filing: 1976-09-29
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Granted: 1979-03-20
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Expires: 1996-09-29
Abstract
Abstract A thermoplastic composition produced by the polymerization of a monomer with unsaturated elastomeric polymers is disclosed. The composition is effective in improving the shrink and gloss of molded thermosetting resin compounds by blending therein.
Inventors
- 👤 Michael G. Roberts
- 👤 Charles E. Bolen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:18
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06; Y; Y10; Y10S; Y10S525/00; Y10S525/911; Y10S525/921
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
144 words
A thermoplastic composition comprising unsaturated graft copolymer produced by polymerization to less than 50 percent conversion of a reaction mixture containing: (a) a monomer; (b) up to about 5 percent by weight of said reaction mixture of an organic acid or anhydride which contains one reactive double bond per molecule thereof; (c) about 0.1 to 7.5 percent by weight of said reaction mixture of a first unsaturated elastomeric polymer having weight average molecular weight from about 43,000 to 380,000, being soluble in said monomer and containing at least about 10 percent by weight thereof of a diene; and (d) about 0.1 to 15 percent by weight of said reaction mixture of a second unsaturated elastomeric polymer having weight average molecular weight from about 500 to 40,000, being soluble in said monomer and containing at least about 10 percent by weight thereof of a diene.
Claim 2
Dependent Claim
144 words
A thermoplastic composition comprising unsaturated graft copolymer produced by polymerization to less than 50 percent conversion of a reaction mixture containing: (a) a monomer; (b) up to about 5 percent by weight of said reaction mixture of an organic acid or anhydride which contains one reactive double bond per molecule thereof; (c) about 0.1 to 7.5 percent by weight of said reaction mixture of a first unsaturated elastomeric polymer having weight average molecular weight from about 43,000 to 380,000, being soluble in said monomer and containing at least about 10 percent by weight thereof of a diene; and (d) about 0.1 to 15 percent by weight of said reaction mixture of a second unsaturated elastomeric polymer having weight average molecular weight from about 500 to 40,000, being soluble in said monomer and containing at least about 10 percent by weight thereof of a diene.
Claim 3
Dependent Claim
27 words
The thermoplastic composition of claim 1 in which said first unsaturated elastomeric polymer has a molecular weight within the range of from about 60,000 to about 200,000.
Claim 4
Dependent Claim
41 words
The thermoplastic composition of claim 1 in which said first unsaturated elastomeric polymer is a styrene-butadiene rubber having a molecular weight of about 100,000 and said second unsaturated elastomeric polymer is a hydroxy-terminated polybutadiene having a molecular weight of about 1,000.
Claim 5
Dependent Claim
12 words
The thermoplastic composition of claim 1 in which said monomer is styrene.
Claim 6
Dependent Claim
40 words
The thermoplastic composition of claim 1 in which said reaction mixture further comprises: (e) up to about 50 percent by weight of said reaction mixture of comonomer selected from the group consisting of methylmethacrylate, ethyl acrylate, acrylonitrile, and vinyl pyridene.
Claim 7
Dependent Claim
72 words
The thermoplastic composition of claim 5 in which said reaction mixture comprises from about 35 to about 99 weight percent of said monomer, up to about 3 weight percent of said acid or anhydride, from about 0.5 to about 5 weight percent of said first unsaturated elastomeric polymer, from about 0.5 to about 9 weight percent of said second unsaturated elastomeric polymer, and up to about 40 weight percent of a comonomer.
Claim 8
Dependent Claim
41 words
The thermoplastic composition of claim 1 in which said first unsaturated elastomeric polymer is selected from (i) members of the group consisting of styrene-butadiene rubbers, polybutadienes, polyisoprenes, and polychloroprenes, and (ii) copolymers of the members of said group with a monomer.
Claim 9
Dependent Claim
41 words
The thermoplastic composition of claim 7 in which said second unsaturated elastomeric polymer is selected from (i) members of the group consisting of styrene-butadiene rubbers, polybutadienes, polyisoprenes, and polychloroprenes and (ii) copolymers of the members of said group with a monomer.
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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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |