Patent US3626033A successfully refreshed from Google Patents.
US3626033A
Expired / Lapsed
US
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Vinyl chloride resins with high heat deformation and impact
Assignee: Dow Chemical Co
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Filing: 1968-11-12
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Granted: 1971-12-07
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Expires: 1988-11-12
Abstract
Abstract High heat deformation and high impact vinyl chloride resins are prepared by blending a resin such as polyvinyl chloride or copolymers of vinyl chloride containing at least about 80 percent vinyl chloride with a polydiene rubber nitrile graft copolymer such as a styrene/acrylonitrile polybutadiene graft copolymer and an anhydride containing copolymer such as styrene-maleic anhydride.
Inventors
- 👤 Henno Keskkula
- 👤 Arthur A Pettis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:30
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L27/22; C08L27/24; C08L35/00; C08L35/06; C08L55/00; C08L55/02; Y; Y10; Y10S; Y10S525/00; Y10S525/942
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
The composition oF claim 1 wherein said vinyl chloride resin is polyvinyl chloride, chlorinated polyvinyl chloride or a copolymer containing at least about 80 percent by weight of vinyl chloride and up to about 20 percent by weight of a copolymerizable monomer.
Claim 2
Dependent Claim
53 words
The composition of claim 1 wherein said polydiene rubber is a homopolymer of a conjugated diolefin, a copolymer of a mixture of conjugated diolefins or a copolymer comprising at least 60 weight percent of a conjugated diolefin or mixtures thereof with the balance to make 100 percent of at least one copolymerizable monomer.
Claim 3
Dependent Claim
18 words
The composition of claim 3 wherein said polydiene rubber is polybutadiene or a copolymer of butadiene and styrene.
Claim 4
Dependent Claim
24 words
The composition of claim 1 wherein said monomer mixture is a mixture of acrylonitrile and styrene or a mixture of acrylonitrile and methyl methacrylate.
Claim 5
Dependent Claim
19 words
The composition of claim 1 wherein said anhydride copolymer is prepared from maleic anhydride and an alkenyl aromatic monomer.
Claim 6
Dependent Claim
145 words
A polyvinyl chloride composition having improved heat deformation and impact properties, said composition comprising a blend of a. from 50 to 75 weight percent of polyvinyl chloride; b. from 10 to 35 weight percent of a polybutadiene nitrile graft copolymer wherein said graft copolymer is prepared by polymerizing from 30 to 60 weight percent of a monomer mixture with from 70 to 40 weight percent of polybutadiene and wherein said monomer mixture comprises acrylonitrile and at least one copolymerizable monomer in the weight proportions, respectively of 15:85 to 35:65; and C. from 15 to 35 weight percent of a copolymer of styrene and maleic anhydride having a viscosity of at least about 4 c.p.s. measured as a 10 percent by weight solution in methyl ethyl ketone at 25* C. and wherein the maleic anhydride comprises from about 15 to 30 weight percent of said copolymer.
Claim 7
Dependent Claim
18 words
The composition of claim 7 wherein said copolymerizable monomer in said monomer mixture is styrene or methyl methacrylate.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |