US5039772A
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Flame retardant organopolysiloxane-polycarbonate graft copolymers
Assignee: General Electric Co
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Filing: 1990-08-27
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Granted: 1991-08-13
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Expires: 2010-08-27
Abstract
Abstract Flame retardant graft organopolysiloxane-polycarbonate copolymers are provided which can be made by effecting addition between a silicon-hydride siloxane and an aliphatically unsaturated substituted bisphenol followed by phosgenation of the resulting adduct. Alternatively, direct addition of the silicon-hydride siloxane onto an aliphatically unsaturated substituted polycarbonate backbone also can be effected.
Inventors
- 👤 Gary C. Davis
- 👤 Barbara E. McGrath
- 👤 Kevin M. Snow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:38
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/18; C08G64/186; C08G77/00; C08G77/42; C08G77/448
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
Flame retardant organopolysiloxane-polycarbonate graft copolymers comprising chemically combined units of the formula, ##STR9## where Q is a monovalent radical having the formula, ##STR10## where R is a C(1-13) monovalent hydrocarbon radical, or a C(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration or condensation, R 1 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration and condensation, R 2 is a C.sub.(6-30) polyvalent aromatic organic radical, R 5 is a C.sub.(2-10) aliphatic organic radical, n is a whole number having a value of from 0 to 100 inclusive and a is an integer having a value of 1 to 4 inclusive.
Claim 2
Dependent Claim
111 words
Flame retardant organopolysiloxane-polycarbonate graft copolymers comprising chemically combined units of the formula, ##STR9## where Q is a monovalent radical having the formula, ##STR10## where R is a C(1-13) monovalent hydrocarbon radical, or a C(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration or condensation, R 1 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration and condensation, R 2 is a C.sub.(6-30) polyvalent aromatic organic radical, R 5 is a C.sub.(2-10) aliphatic organic radical, n is a whole number having a value of from 0 to 100 inclusive and a is an integer having a value of 1 to 4 inclusive.
Claim 3
Dependent Claim
125 words
A flame retardant organopolysiloxane-polycarbonate graft copolymer in accordance with claim 1, which is made by phosgenating a bisphenol comprising a bisphenol polydiorganosiloxane adduct of the formula, ##STR11## where Q is a monovalent radical having the formula, ##STR12## where R is a C.sub.(1-13) monovalent hydrocarbon radicals, or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration or condensation, R 1 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration and condensation, R 2 is a C.sub.(6-30) polyvalent aromatic organic radical, R 5 is a C.sub.(2-10) aliphatic organic radical, n is a whole number having a value of from 0 to 100 inclusive and a is an integer having a value of 1 to 4 inclusive.
Claim 4
Dependent Claim
45 words
A flame retardant organopolysiloxane-polycarbonate graft copolymer in accordance with claim 2, which is made by phosgenating a mixture of the bisphenol polydiorganosiloxane adduct of the formula ##STR13## and a bisphenol of the formula, HO--R.sup.4 --OH, where R 4 is a C.sub.(6-30) divalent aromatic organic radical.
Claim 5
Dependent Claim
129 words
A flame retardant organopolysiloxane-polycarbonate graft copolymer in accordance with claim 1 which is made by effecting the hydrosilylation of an aromatic polycarbonate having condensed aliphatically unsaturated units of the formula, ##STR14## with a silicon hydride polydiorganosiloxane of the formula, ##STR15## where R is a C.sub.(1-13) monovalent hydrocarbon radical, or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration or condensation, R 1 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration and condensation, R 2 is a C.sub.(6-30) polyvalent aromatic organic radical, R 3 is a C.sub.(2-10) aliphatically unsaturated organic radical, n is a whole number having a value of from 0 to 100 inclusive, and a is an integer having a value of 1 to 4 inclusive.
Claim 6
Dependent Claim
16 words
A flame retardant organopolysiloxane-polycarbonate graft copolymer in accordance with claim 1, where R 2 is ##STR16##
Claim 7
Dependent Claim
11 words
A flame retardant polydimethylpolysiloxanepolycarbonate graft copolymer in accordance with claim 1.
Claim 8
Dependent Claim
26 words
A flame retardant organopolysiloxane-polycarbonate graft copolymer in accordance with claim 1, where Q is ##STR17## where n is a whole number equal to 0 to 100.
Claim 9
Dependent Claim
106 words
A bisphenol polydiorganosiloxane adduct of the formula, ##STR18## where Q is a monovalent radical having the formula, ##STR19## where R is a C.sub.(1-13) monovalent hydrocarbon radical, or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration or condensation, R 1 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration and condensation, R 2 is a C.sub.(6-30) polyvalent aromatic organic radical, R 5 is a C.sub.(2-10) aliphatic organic radical, n is a whole number having a value of from 0 to 100 inclusive and a is an integer having a value of 1 to 4 inclusive.
Claim 10
Dependent Claim
106 words
A bisphenol polydiorganosiloxane adduct of the formula, ##STR18## where Q is a monovalent radical having the formula, ##STR19## where R is a C.sub.(1-13) monovalent hydrocarbon radical, or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration or condensation, R 1 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibration and condensation, R 2 is a C.sub.(6-30) polyvalent aromatic organic radical, R 5 is a C.sub.(2-10) aliphatic organic radical, n is a whole number having a value of from 0 to 100 inclusive and a is an integer having a value of 1 to 4 inclusive.
Claim 11
Dependent Claim
8 words
A bisphenol-polydimethylpolysiloxane adduct in accordance with claim 8.
Claim 12
Dependent Claim
13 words
A bisphenol-polydiorganosiloxane adduct in accordance with claim 8, where R 2 is ##STR20##
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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) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |