Patent US4251645A successfully refreshed from Google Patents.
US4251645A
Expired / Lapsed
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Thermoplastic moulding compositions
Assignee: Bayer AG
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Filing: 1978-03-17
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Granted: 1981-02-17
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Expires: 1998-03-17
Abstract
Abstract Thermoplastic moulding compositions of (A) 20 to 99 parts by weight of a vinyl chloride homopolymer or copolymer containing at least 80% by weight of vinyl chloride and having K-values of from 50 to 80, (B) 80 to 1 part by weight of a graft polymer produced by the solution polymerization in an organic solvent of (a) styrene and/or methyl methacrylate or (b) styrene and acrylonitrile and, optionally, methyl methacrylate in the presence of an EPDM rubber.
Inventors
- 👤 Gert Humme
- 👤 Karl-Heinz Ott
- 👤 Dietrich Hardt
- 👤 Karl Dinges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:07
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08F; C08F255/00; C08F255/02; C08F255/06; C08L51/00; C08L51/04; C08L51/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A thermoplastic moulding composition consisting essentially of (A) from 20 to 99 parts by weight of a vinyl chloride homopolymer or copolymer containing at least 80% by weight of vinyl chloride and having K-values of from 50 to 80; and (B) from 80 to 1 part by weight of a graft polymer produced by the solution polymerization in an organic solvent monomers consisting essentially of (a) a member selected from the group consisting of styrene, 2-methyl styrene, methyl methacrylate and mixtures thereof or (b) acrylonitrile mixed with a member selected from the group consisting of styrene, 2-methyl styrene, methyl methacrylate and mixtures thereof in the presence of EPDM rubber.
Claim 2
Dependent Claim
109 words
A thermoplastic moulding composition consisting essentially of (A) from 20 to 99 parts by weight of a vinyl chloride homopolymer or copolymer containing at least 80% by weight of vinyl chloride and having K-values of from 50 to 80; and (B) from 80 to 1 part by weight of a graft polymer produced by the solution polymerization in an organic solvent monomers consisting essentially of (a) a member selected from the group consisting of styrene, 2-methyl styrene, methyl methacrylate and mixtures thereof or (b) acrylonitrile mixed with a member selected from the group consisting of styrene, 2-methyl styrene, methyl methacrylate and mixtures thereof in the presence of EPDM rubber.
Claim 3
Dependent Claim
26 words
A thermoplastic moulding composition as claimed in claim 1 wherein (A) is 70 to 99% by weight and (B) is 30 to 1 part by weight.
Claim 4
Dependent Claim
25 words
A thermoplastic moulding composition as claimed in claim 1, wherein the EPDM rubber has a Mooney plasticity (MLl+4', 100° C.) of from 20 to 150.
Claim 5
Dependent Claim
24 words
A moulding composition as claimed in claim 1, wherein the graft polymer (B) has been produced in an aromatic solvent or aromatic solvent mixture.
Claim 6
Dependent Claim
65 words
A moulding composition as claimed in claim 1, wherein the graft polymer (B) has been produced by polymerisation at a temperature above 80° C. with a ratio by weight of solvent:graft polymer plus graft base of from 2.5:1 to 10.1, a ratio by weight of graft base:graft monomer of from 0.33:1 to 4:1 and a ratio by weight of styrene:acylonitrile of from 1:1 to 9:1.
Claim 7
Dependent Claim
21 words
A moulding composition as claimed in claim 1, wherein the diene component in the EPDM rubber is 5-ethylidene-2-norbornene, dicyclopentadiene or 1,4-hexadiene.
Claim 8
Dependent Claim
79 words
A thermoplastic moulding composition as claimed in claim 1 containing: (A) from 75 to 96 parts by weight of polyvinyl chloride with a K-value of from 50 to 80; and (B) from 25 to 4 parts by weight of a graft polymer produced by the solution polymerisation in benzene, toluene or a mixture thereof at 100° C. to 140° C. of styrene and acrylonitrile in the presence of an EPDM rubber with ethylidene-2-norbornene, dicyclopentadiene or 1,4-hexadiene as diene component.
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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) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |