US4945147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polyester-siloxane block copolymers and method for making
Assignee: General Electric Co
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Filing: 1989-03-06
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Granted: 1990-07-31
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Expires: 2009-03-06
Abstract
Abstract There is provided by the present invention aromatic polyester-siloxane block copolymers which can be made by effecting the condensation between tetramethyldisiloxane bisbenzoic acid or acid chloride with a dihydric phenol such as bisphenol A or in combination with a mixture of such tetramethyldisiloxane bisbenzoic acid and aromatic acids, such as terephthalic acid or isophthalic acid. The aromatic polyester-siloxane block copolymers can be used as molding compounds, extruded films, in making composite matrix materials and as flame retardants for aromatic polycarbonates.
Inventors
- 👤 Peter P. Policastro
- 👤 Pamela K. Hernandez
- 👤 Sandra A. Swint
- 👤 Gary C. Davis
- 👤 Jonathan D. Rich
- 👤 Philip J. McDermott
- 👤 Thomas L. Guggenheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:50
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/445; C08G63/00; C08G63/68; C08G63/695; C08G63/6954; C08G63/6956
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
An aromatic polyester-siloxane block copolymer comprising chemically combined aromatic polyester units selected from the class consisting of dihydric phenol units, aromatic diacid units and condensed mixtures thereof, and 0.1 to 100 mole percent of condensed siloxane units based on the total moles of condensed polyester units and siloxane condensed units in the aromatic polyester-siloxane block copolymer, where the condensed siloxane units have the formula, ##STR10## Q is a member selected from the class consisting of ##STR11## and mixtures thereof, R-R 3 are selected from C.sub.(1-13) monovalent hydrocarbon radicals and C.sub.(1-13) monovalent hydrocarbon radicals substituted with radicals inert during condensation reaction, R 4 is a C.sub.(6-13) divalent aromatic organic radical and n is an integer having a value of from 1 to 200 inclusive.
Claim 2
Dependent Claim
123 words
An aromatic polyester-siloxane block copolymer comprising chemically combined aromatic polyester units selected from the class consisting of dihydric phenol units, aromatic diacid units and condensed mixtures thereof, and 0.1 to 100 mole percent of condensed siloxane units based on the total moles of condensed polyester units and siloxane condensed units in the aromatic polyester-siloxane block copolymer, where the condensed siloxane units have the formula, ##STR10## Q is a member selected from the class consisting of ##STR11## and mixtures thereof, R-R 3 are selected from C.sub.(1-13) monovalent hydrocarbon radicals and C.sub.(1-13) monovalent hydrocarbon radicals substituted with radicals inert during condensation reaction, R 4 is a C.sub.(6-13) divalent aromatic organic radical and n is an integer having a value of from 1 to 200 inclusive.
Claim 3
Dependent Claim
21 words
An aromatic polyester-siloxane block copolymer of claim 1, where Q is ##STR12## and R 4 is as defined in claim 1.
Claim 4
Dependent Claim
12 words
An aromatic polyester-siloxane block copolymer of claim 1, where Q is ##STR13##
Claim 5
Dependent Claim
30 words
An aromatic polyester-siloxane block copolymer of claim 1 where the aromatic polyester block is formed by condensing bisphenol A and terephthaloyl chloride, or a mixture of terephthaloyl and isophthaloyl chloride.
Claim 6
Dependent Claim
20 words
An aromatic polyester siloxane block copolymer of claim 1, where the aromatic polyester block results from the condensation of dihydroxybiphenyl.
Claim 7
Dependent Claim
14 words
An aromatic-siloxane block copolymer in accordance with claim 1, where R 4 is phenylene.
Claim 8
Dependent Claim
18 words
An aromatic polyester-siloxane block copolymer of claim 1 where the dihydric phenol unit is a bisphenol A unit.
Claim 9
Dependent Claim
18 words
An aromatic polyester-siloxane block copolymer of claim 1 where the dihydric phenol unit is a 4,4'-dihydroxy-3,3',5,5'-tetramethyl biphenol unit.
Claim 10
Dependent Claim
19 words
An aromatic polyester-siloxane block copolymer of claim 1 where the dihydric phenol unit is a tetramethyl bisphenol A unit.
Claim 11
Dependent Claim
18 words
An aromatic polyester-siloxane block copolymer of claim 1 where the dihydric phenol unit is a tetramethyldiphenylsulfone diol unit.
References Cited (Backward Citations)
US4794153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |