US4276391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-impact thermoplastic vinyl chloride polymer moulding composition
Assignee: Bayer AG
•
Filing: 1979-12-17
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Granted: 1981-06-30
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Expires: 1999-12-17
Abstract
Abstract Thermoplastic moulding compositions of (1) 75 to 99 parts by weight of vinyl chloride polymers containing from 1 to 10% by weight of ethylene vinyl ester copolymers, and (2) 1 to 25 parts by weight of graft polymers of styrene and/or methyl methacrylate or of styrene and acrylonitrile and, optionally, methyl methacrylate on an ethylene-propylene terpolymer rubber.
Inventors
- 👤 Dietrich Hardt
- 👤 Gert Humme
- 👤 Karl-Heinz Ott
- 👤 Hans-Eberhard Braese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:11
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08F; C08F255/00; C08F255/02; C08F255/06; C08L51/00; C08L51/003; C08L51/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
A thermoplastic moulding composition comprising (a) 75 to 99 parts by weight of a graft polymer of 90 to 99% of vinyl chloride onto 1 to 10% by weight of an ethylene vinyl ester copolymer, and (c) 1 to 25 parts by weight of a graft polymer consisting essentially of ethylene propylene terpolymer rubber onto which is grafted a member selected from the group consisting of styrene, methylmethacrylate, a mixture of styrene and methlymethacrylate, and a mixture of styrene and acrylonitrile.
Claim 2
Dependent Claim
81 words
A thermoplastic moulding composition comprising (a) 75 to 99 parts by weight of a graft polymer of 90 to 99% of vinyl chloride onto 1 to 10% by weight of an ethylene vinyl ester copolymer, and (c) 1 to 25 parts by weight of a graft polymer consisting essentially of ethylene propylene terpolymer rubber onto which is grafted a member selected from the group consisting of styrene, methylmethacrylate, a mixture of styrene and methlymethacrylate, and a mixture of styrene and acrylonitrile.
Claim 3
Dependent Claim
32 words
A moulding composition as claimed in claim 1, wherein the ethylene vinyl ester copolymer is an ethylene vinyl acetate copolymer with a vinyl acetate content of from 20 to 80% by weight.
Claim 4
Dependent Claim
26 words
A moulding composition as claimed in claim 2, wherein the ethylene vinyl acetate copolymer has a vinyl acetate content of from 25 to 55% by weight.
Claim 5
Dependent Claim
26 words
A moulding composition as claimed in claim 1, wherein the graft base of component (b) contains 1 to 15 carbon-carbon double bonds per 1000 carbon atoms.
Claim 6
Dependent Claim
22 words
A moulding composition as claimed in claim 1, wherein the ethylene-propylene terpolymer constitutes at most 18% by weight of the total composition.
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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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |