US4400491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyester carbonates and the admixture thereof with known polycarbonates to give thermoplastic moulding compositions
Assignee: Bayer AG
•
Filing: 1982-05-17
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Granted: 1983-08-23
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Expires: 2002-05-17
Abstract
Abstract The new thermoplastic copolyester carbonates which are based on polybutylene glycols and hexahydrophthalic acid or trimethyladipic acid, as well as admixtures of copolyester carbonates of this type with known polycarbonates are suitable for thermoplastic moulding compositions, particularly where good stability to solvents, such as petrol, is required.
Inventors
- 👤 Peter Kafer
- 👤 Leo Morbitzer
- 👤 Werner Nouvertne
- 👤 Dieter Neuray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:55
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/64; C08L; C08L69/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
146 words
A thermoplastic copolyester carbonate of formula (I) composed of structural units of the general formulae (IA) and (IB); ##STR4## wherein R denotes a hydrogen, chlorine or bromine atom or a C 1 to C 3 alkyl group, m is 0, 1 or 2, X denotes a direct bond or a C 1 to C 8 alkylene, C 2 to C 8 alkylidene, cyclohexylene, cyclohexylidene, --SO 2 or --S radical, Y denotes--(CH 2 ) 4 , M denotes a radical of hexahydrophthalic acid or a radical of trimethyladipic acid, and u is an integer of from 10 to 50, said copolyester carbonate having an average weight-average molecular weight Mw of from 15,000 to 200,000, and which contains 50 to 95% by weight of aromatic polycarbonate segments and 50 to 5% by weight of polyester segments having an average number-average molecular weight Mn of from 2,000 to 20,000.
Claim 2
Dependent Claim
146 words
A thermoplastic copolyester carbonate of formula (I) composed of structural units of the general formulae (IA) and (IB); ##STR4## wherein R denotes a hydrogen, chlorine or bromine atom or a C 1 to C 3 alkyl group, m is 0, 1 or 2, X denotes a direct bond or a C 1 to C 8 alkylene, C 2 to C 8 alkylidene, cyclohexylene, cyclohexylidene, --SO 2 or --S radical, Y denotes--(CH 2 ) 4 , M denotes a radical of hexahydrophthalic acid or a radical of trimethyladipic acid, and u is an integer of from 10 to 50, said copolyester carbonate having an average weight-average molecular weight Mw of from 15,000 to 200,000, and which contains 50 to 95% by weight of aromatic polycarbonate segments and 50 to 5% by weight of polyester segments having an average number-average molecular weight Mn of from 2,000 to 20,000.
Claim 3
Dependent Claim
15 words
A copolyester according to claim 1, wherein u is an integer from 12 to 30.
Claim 4
Dependent Claim
20 words
A copolyester carbonate according to claim 1 or 2 having an average weight-average molecular weight Mw of 20,000 to 80,000.
Claim 5
Dependent Claim
40 words
A copolyester carbonate according to claim 1 or claim 2, which contains 80 to 95% by weight of aromatic polycarbonate segments and 20 to 5% by weight of polyester segments having an average number-average molecular weight of 4,000 to 16,000.
Claim 6
Dependent Claim
115 words
A thermoplastic moulding composition consisting of a mixture of an aromatic polycarbonate of the general formula ##STR5## wherein R, m and X have the same meanings as in claim 1 for formula (IA), and n is the degree of polymerisation of from 20 to 400, and a copolyester carbonate according to claims 1 or 2 with a content of polyester segments of from 50 to 20% by weight, relative to polyester carbonate weight, in which mixing ratio of polycarbonate of the general formula (II) and a copolyester carbonate of the general formula (I) is chosen to give a content of polyester segments in the moulding composition of between 20% by weight and 5% by weight.
Claim 7
Dependent Claim
19 words
A moulding composition according to claim 5, wherein n is the degree of polymerisation of from 25 to 60.
Claim 8
Dependent Claim
12 words
A molded article formed from a copolyester carbonate according to claim 1.
Claim 9
Dependent Claim
9 words
An article moulded from the composition of claim 5.
Claim 10
Dependent Claim
12 words
The molded article of claim 7 in the form of a sheet.
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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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |