Patent US4940747A successfully refreshed from Google Patents.
US4940747A
Expired / Lapsed
US
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Moulding materials, based on vinyl chloride polymers, with improved processability
Assignee: Bayer AG
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Filing: 1986-11-17
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Granted: 1990-07-10
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Expires: 2006-11-17
Abstract
Abstract Thermoplastic moulding materials, of vinyl chloride polymers, which contain a polymer, prepared in the presence of mercaptans, from styrene, alpha -methylstyrene, vinyltoluene, acrylonitrile, methyl methacrylate or mixtures thereof and which possess improved processing properties.
Inventors
- 👤 Herbert Eichenauer
- 👤 Christian Lindner
- 👤 Karl-Heinz Ott
- 👤 Hans-Eberhard Braese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:29
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L55/00; C08L55/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
Vinyl chloride polymer moulding materials which comprise polyvinyl chloride or copolymers of vinyl chloride with up to 50% by weight of copolymerizable compounds comprising vinyl esters, maleic anhydride or semi-esters of maleic acid and which contain 0.1 to 20% by weight of a thermoplastic polymer of styrene, α-methylstyrene, p-methylstyrene, vinyltoluene, (meth)acrylonitrile, methyl methacrylate or mixtures thereof having a limiting viscosity of 2 to 15 ml/g (measured in dimethylformamide at 25° C.) and a sulphur content of 1.15 to 3.95% by weight.
Claim 2
Dependent Claim
81 words
Vinyl chloride polymer moulding materials which comprise polyvinyl chloride or copolymers of vinyl chloride with up to 50% by weight of copolymerizable compounds comprising vinyl esters, maleic anhydride or semi-esters of maleic acid and which contain 0.1 to 20% by weight of a thermoplastic polymer of styrene, α-methylstyrene, p-methylstyrene, vinyltoluene, (meth)acrylonitrile, methyl methacrylate or mixtures thereof having a limiting viscosity of 2 to 15 ml/g (measured in dimethylformamide at 25° C.) and a sulphur content of 1.15 to 3.95% by weight.
Claim 3
Dependent Claim
138 words
Moulding materials according to claim 1 which additionally contain, relative to 100 parts of moulding material, a polymer of (A) a graft polymer of styrene, α-methylstyrene, methyl methacrylate, acrylonitrile, vinyl chloride or mixtures thereof on an elastomer base having a glass transition temperature (Tg) <0° C., in an amount of up to 80 parts by weight, (B) a resinous thermoplastic copolymer or homopolymer, of styrene, α-methylstyrene, p-methylstyrene, vinyl-toluene, (meth)acrylonitrile, methyl methacrylate or mixtures thereof having a limiting viscosity >0.3 dl/g (measured in dimethylformamide at 25° C.), in an amount of up to 90 parts by weight, or (C) a rubber from the series comprising the diene homo-or diene copolymers, olefine rubbers, or chlorinated polyolefines, in an amount of up to 50 parts by weight, and up to 70 parts by weight of a plasticizer for vinyl chloride polymers.
Claim 4
Dependent Claim
24 words
Moulding materials according to claim 1 which contain up to 70 parts by weight of a low molecular weight plasticizer for vinyl chloride polymers.
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) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |