US4762873A
Expired / Lapsed
US
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Polycarbonate resin composition
Assignee: Teijin Ltd
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Filing: 1986-06-12
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Granted: 1988-08-09
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Expires: 2006-06-12
Abstract
Abstract A polycarbonate resin composition comprising a blended mixture of (A) 100 parts by weight of a polycarbonate resin having a viscosity average molecular weight of from about 13,000 to about 18,000, (B) 0.01 to 0.1 part by weight of a partial ester of a monobasic fatty acid having 10 to 22 carbon atoms with a polyhydric alcohol having 2 to 10 carbon atoms, (C) 0.001 to 0.01 part by weight of trimethyl phosphate, and (D) 0.00001 to 0.002 part by weight, calculated as phosphorus atoms, of a phosphite ester having 9 to 60 carbon atoms.
Inventors
- 👤 Masayoshi Miyauchi
- 👤 Osamu Ohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103; C08K5/49; C08K5/51; C08K5/52; C08K5/521
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
A polycarbonate resin composition comprising a blended mixture of (A) 100 parts by weight of a polycarbonate resin having a viscosity average molecular weight of from about 13,000 to about 18,000, (B) 0.01 to 0.1 part by weight of a partial ester of a monobasic fatty acid having 10 to 22 carbon atoms with a polyhydric alcohol having 2 to 10 carbon atoms, (C) 0.001 to 0.01 part by weight of trimethyl phosphate, and (D) 0.00001 to 0.002 part by weight, calculated as phosphorus atoms, of a phosphite ester having 9 to 60 carbon atoms.
Claim 2
Dependent Claim
95 words
A polycarbonate resin composition comprising a blended mixture of (A) 100 parts by weight of a polycarbonate resin having a viscosity average molecular weight of from about 13,000 to about 18,000, (B) 0.01 to 0.1 part by weight of a partial ester of a monobasic fatty acid having 10 to 22 carbon atoms with a polyhydric alcohol having 2 to 10 carbon atoms, (C) 0.001 to 0.01 part by weight of trimethyl phosphate, and (D) 0.00001 to 0.002 part by weight, calculated as phosphorus atoms, of a phosphite ester having 9 to 60 carbon atoms.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein the polycarbonate resin (A) is a polycarbonate resin derived from a bis(hydroxyphenyl)alkane and a carbonate precursor.
Claim 4
Dependent Claim
23 words
The composition of claim 2 wherein the bis(hydroxyphenyl)alkane is at least one member selected from the group consisting of 2,2-bis(4-hydroxyphenyl)propane, 1,1-bis(4-hydroxyphenyl)ethane and 2,2-bis(4-hydroxyphenyl)hexafluoropropane.
Claim 5
Dependent Claim
24 words
The composition of claim 2 wherein the carbonate precursor is at least one member selected from the group consisting of phosgene and diphenyl carbonate.
Claim 6
Dependent Claim
72 words
The composition of claim 1 wherein the partial ester (B) is a partial ester derived from at least one monobasic fatty acid having 10 to 22 carbon atoms selected from the group consisting of myristic acid, palmitic acid, stearic acid, oleic acid and fatty acids of hardened fish oils and at least one polyhydric alcohol having 2 to 10 carbon atoms selected from the group consisting of ethylene glycol, glycerol and pentaerythritol.
Claim 7
Dependent Claim
14 words
The composition of claim 1 wherein the phosphite ester (D) is a phosphite tri-ester.
Claim 8
Dependent Claim
30 words
The composition of claim 6 wherein the phosphite tri-ester is at least one member selected from the group consisting of triphenyl phosphite, tris(nonylphenyl) phosphite, 2-ethylhexyl diphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite.
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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) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |