Patent US3497944A successfully refreshed from Google Patents.
Patent US4143024A successfully refreshed from Google Patents.
US4143024A
Expired / Lapsed
US
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Thermoplastic polycarbonate moulding compositions with improved ease of mould release
Assignee: Bayer AG
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Filing: 1977-05-02
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Granted: 1979-03-06
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Expires: 1997-05-02
Abstract
Abstract The invention relates to a thermoplastic moulding composition comprising a high molecular, thermoplastic aromatic polycarbonate based on an aromatic dihydroxy compound and containing 0,01 to 0.5% by weight of an ester of a saturated aliphatic carboxylic acid with 10 to 20 C. atoms per molecule and an aromatic hydroxy compound with from 1 to 6 OH groups.
Inventors
- 👤 Siegfried Adelmann
- 👤 Dieter Margotte
- 👤 Hugo Vernaleken
- 👤 Werner Nouvertne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:00
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08K; C08K5/00; C08K5/04; C08K5/10; H; H05; H05K; H05K3/00; H05K3/22; H05K3/28; H05K3/285; H05K3/288
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
54 words
A thermoplastic moulding composition comprising a high molecular thermoplastic aromatic polycarbonate based on an aromatic dihydroxy compound and containing 0.01 to 0.5% by weight of a partial ester of a saturated aliphatic carboxylic acid with 10 to 20 C atoms per molecule and an aromatic hydroxy compound with from 1 to 6 OH groups.
Claim 2
Dependent Claim
54 words
A thermoplastic moulding composition comprising a high molecular thermoplastic aromatic polycarbonate based on an aromatic dihydroxy compound and containing 0.01 to 0.5% by weight of a partial ester of a saturated aliphatic carboxylic acid with 10 to 20 C atoms per molecule and an aromatic hydroxy compound with from 1 to 6 OH groups.
Claim 3
Dependent Claim
20 words
A thermoplastic moulding composition according to claim 1 containing from 0.05 to 0.1% by weight of the said partial ester.
Claim 4
Dependent Claim
23 words
A thermoplastic moulding composition according to claim 1 in which the said polycarbonate has a weight-average molecular weight of from 10,000 to 200,000.
Claim 5
Dependent Claim
70 words
A composition according to claim 1 wherein the aromatic polycarbonate is derived from a bisphenol of the formulae (I): ##STR3## in which R is identical or different and denotes H, C 1 -C 4 -alkyl, Cl or Br and in which X is a bond, C 1 -C 8 -alkylene, C 2 -C 8 -alkylidene, C 5 -C 15 -cycloalkylene, C 5 -C 15 -cycloalkylidene, --SO 2 -- or ##STR4##
Claim 6
Dependent Claim
35 words
The thermoplastic moulding composition according to claim 1 wherein the said polyester is a partial ester selected from the group consisting of phloroglucinol distearate, phloroglucinol palmitate, 1,4-bis((4,4'-dihydroxy-triphenyl)-methyl)benzene tetramyristate, hexahydroxybenzene pentastearate, tretramethyl-bisphenol A-palmitate, and 1,4-bis((4,4'-dihydroxy-triphenyl)methyl)benzene tristearate.
Claim 7
Dependent Claim
28 words
The thermoplastic moulding composition according to claim 1 wherein the said polyester is a partial ester selected from the group consisting of phloroglucinol distearate, tetramethyl-bisphenol A-palmitate, 1,4-bis((4,4'-dihydroxytriphenyl)methyl)benzene tristearate.
Claim 8
Dependent Claim
16 words
A process for producing moulded articles which comprises injection moulding a composition according to claim 1.
Claim 9
Dependent Claim
11 words
A moulded article formed from the composition according to claim 1.
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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |