US4239861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl chloride-polycarbonate alloys
Assignee: Bayer AG
•
Filing: 1975-01-14
•
Granted: 1980-12-16
•
Expires: 1995-01-14
Abstract
Abstract Polymer alloys consisting of (a) 20-90% by weight of polyvinyl chloride or copolymers of vinyl chloride with up to 30% by weight of other copolymerizable vinyl compounds, and (b) 10-80% by weight of aromatic polycarbonates.
Inventors
- 👤 Hans-Eberhard Braese
- 👤 Winfried Fischer
- 👤 Dietrich Hardt
- 👤 Richard Prinz
- 👤 Volker Serini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:18
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L69/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
123 words
A polymer composition comprising: (a) from 20 to 90% by weight of a member selected from the group consisting of (i) vinyl chloride homopolymer and (ii) a copolymer consisting of copolymerized vinyl chloride and up to 30% by weight of a monomer selected from the group consisting of vinylidene chloride; vinylidene fluoride; vinyl acetate; vinyl propionate; vinyl benzoate; acrylic acid; methacrylic acid; alkyl esters, amides and nitriles of acrylic and methacrylic acids; maleic acid esters; maleic imides; vinyl ethers; ethylene; propylene and butylene, and (b) from 80 to 10% by weight of at least one aromatic polycarbonate which is a polyester of carbonic acid derived from a dihydroxyl compound in which the hydroxyl groups are directly attached to one or more aromatic rings.
Claim 2
Dependent Claim
123 words
A polymer composition comprising: (a) from 20 to 90% by weight of a member selected from the group consisting of (i) vinyl chloride homopolymer and (ii) a copolymer consisting of copolymerized vinyl chloride and up to 30% by weight of a monomer selected from the group consisting of vinylidene chloride; vinylidene fluoride; vinyl acetate; vinyl propionate; vinyl benzoate; acrylic acid; methacrylic acid; alkyl esters, amides and nitriles of acrylic and methacrylic acids; maleic acid esters; maleic imides; vinyl ethers; ethylene; propylene and butylene, and (b) from 80 to 10% by weight of at least one aromatic polycarbonate which is a polyester of carbonic acid derived from a dihydroxyl compound in which the hydroxyl groups are directly attached to one or more aromatic rings.
Claim 3
Dependent Claim
35 words
A polymer composition as claimed in claim 1 which comprises: (a) from 40 to 80% by weight of polyvinyl chloride homopolymer, and (b) from 60 to 20% by weight of at least one aromatic polycarbonate.
Claim 4
Dependent Claim
64 words
A polymer composition as claimed in claim 1 in which component (a) comprises at least one vinyl chloride copolymer containing up to 30% by weight of copolymerised vinyl acetate vinyl propionate, vinyl benzoate, acrylic or methacrylic acid esters containing from 1 to 10 carbon atoms in the alcohol moiety, maleic acid esters or semi-esters, ethylene, propylene, vinyl ethers, acrylonitrile, maleic imides or vinylidene chloride.
Claim 5
Dependent Claim
20 words
A polymer composition as claimed in claim 1 in which component (a) has a K-value of from 50 to 80.
Claim 6
Dependent Claim
21 words
A polymer composition as claimed in claim 1 in which component (b) has a molecular weight of from 10,000 to 200,000.
Claim 7
Dependent Claim
33 words
A polymer composition as claimed in claim 1 in which component (b) is based on at least one bisphenol selected from the group consisting of 2,2-bis-(4-hydroxyphenyl)-propane, 2,4-bis-(4-hydroxyphenyl)-2-methylbutane, 1,1-bis-(4-hydroxyphenyl)-cyclohexane, α,α'-bis-(4-hydroxyphenyl)-p-diisopropylbenzene, 2,2-bis-(3,5-dichloro-4-hydroxyphenyl)-propane, 2,2-bis-(3,5-dibromo-4-hydroxyphenyl)-propane and 2,2-bis-(3-chloro-4-hydroxyphenyl)-propane.
Claim 8
Dependent Claim
32 words
A polymer composition as claimed in claim 1 in which component (b) is based on 2,2-bis-(4-hydroxyphenyl)-propane and one member selected from the group consisting of 2,2-bis-(4-hydroxyphenyl)-2-methylbutane, 1,1-bis-(4-hydroxyphenyl)-cyclohexane, α,α'-bis-(4-hydroxyphenyl)-p-diisopropylbenzene, 2,2-bis-(3,5-dichloro-4-hydroxyphenyl)-propane, 2,2-bis-(3,5-dibromo-4-hydroxyphenyl)-propane and 2,2-bis-(3-chloro-4-hydroxyphenyl)-propane.
Claim 9
Dependent Claim
28 words
A polymer composition as claimed in claim 1 in which component (b) is based on one member selected from the group consisting of 2,2-bis-(4-hydroxyphenyl)-propane or 2,4-bis-(4-hydroxyphenyl)-2-methylbutaene and α,α'-bis-(4-hydroxyphenyl)-p-diisopropylbenzene.
Claim 10
Dependent Claim
21 words
A polymer composition as claimed in claim 1 in which component (b) has a molecular weight of from 20,000 to 80,000.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |