US5025074A
Expired / Lapsed
US
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Flame retardant organopolysiloxane-polycarbonate triblock copolymers
Assignee: General Electric Co
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Filing: 1990-08-27
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Granted: 1991-06-18
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Expires: 2010-08-27
Abstract
Abstract Phenol-organopolysiloxane chainstoppers are phosgenated in combination with a bisphenol to make flame retardant organopolysiloxane-polycarbonate triblock copolymers. The phenol-organopolysiloxane chainstoppers can be made by effecting addition between an aliphatically unsaturated phenol and a silicon-hydride organopolysiloxane.
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 20:52
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G64/00; C08G64/18; C08G64/186; C08G77/42; C08G77/448
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
75 words
A flame retardant organopolysiloxanepolycarbonate triblock copolymer comprising an aromatic polycarbonate having terminal groups of the formula, ##STR6## where R is a C.sub.(6-20) divalent aromatic organic radical, R 1 is a C.sub.(2-8) aliphatic organic radical, R 2 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibrium or condensation, R 3 is a C.sub.(1-13) monovalent organic radical and n is an integer equal to 0 to 100 inclusive.
Claim 2
Dependent Claim
75 words
A flame retardant organopolysiloxanepolycarbonate triblock copolymer comprising an aromatic polycarbonate having terminal groups of the formula, ##STR6## where R is a C.sub.(6-20) divalent aromatic organic radical, R 1 is a C.sub.(2-8) aliphatic organic radical, R 2 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibrium or condensation, R 3 is a C.sub.(1-13) monovalent organic radical and n is an integer equal to 0 to 100 inclusive.
Claim 3
Dependent Claim
16 words
A flame retardant organopolysiloxane-polycarbonate triblock copolymer ion accordance with claim 1, where R 2 is methyl.
Claim 4
Dependent Claim
15 words
A flame retardant organopolysiloxane-polycarbonate triblock copolymer in accordance with claim 1, where R is ##STR7##
Claim 5
Dependent Claim
21 words
A flame retardant organopolysiloxane-polycarbonate triblock copolymer in accordance with claim 1, where R 1 is trimethylene and R 3 is methyl.
Claim 6
Independent Claim
110 words
A method for making a flame retardant organopolysiloxane-polycarbonate triblock copolymer which comprises phosgenating under interfacial reaction conditions using water, an organic solvent and base and a mixture of a phenolorganopolysiloxane chainstopper having the formula, ##STR8## and a bisphenol having the formula, HO-R.sup.4 -OH, where R is a C.sub.(6-20) divalent aromatic organic radical, R 1 is a C.sub.(2-8) aliphatic organic radical, R 2 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibrium or condensation, R 3 is a C.sub.(1-13) monovalent organic radical, R 4 is a C.sub.(6-30) divalent aromatic organic radical and n is an integer equal to 0 to 100 inclusive.
Claim 7
Independent Claim
110 words
A method for making a flame retardant organopolysiloxane-polycarbonate triblock copolymer which comprises phosgenating under interfacial reaction conditions using water, an organic solvent and base and a mixture of a phenolorganopolysiloxane chainstopper having the formula, ##STR8## and a bisphenol having the formula, HO-R.sup.4 -OH, where R is a C.sub.(6-20) divalent aromatic organic radical, R 1 is a C.sub.(2-8) aliphatic organic radical, R 2 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibrium or condensation, R 3 is a C.sub.(1-13) monovalent organic radical, R 4 is a C.sub.(6-30) divalent aromatic organic radical and n is an integer equal to 0 to 100 inclusive.
Claim 8
Dependent Claim
13 words
A method in accordance with claim 5 where the bisphenol is bisphenol A.
Claim 9
Dependent Claim
15 words
A method in accordance with claim 5, where the phenol-organopolysiloxane chainstopper is a methylpolysiloxane chainstopper.
Claim 10
Dependent Claim
84 words
A phenol-organopolysiloxane chainstopper having the formula ##STR9## where R 1 is a C.sub.(2-8) aliphatic organic radical, R 2 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibrium or condensation, R 3 is a C.sub.(1-13) monovalent organic radical, R 6 is a polyvalent aromatic radical selected from ##STR10## R 7 is a C.sub.(1-8) alkyl radical, n is an integer equal to 0 to 100 inclusive and b is a whole number equal to 0 or 1.
Claim 11
Dependent Claim
84 words
A phenol-organopolysiloxane chainstopper having the formula ##STR9## where R 1 is a C.sub.(2-8) aliphatic organic radical, R 2 is a C.sub.(1-13) monovalent hydrocarbon radical or a C.sub.(1-13) monovalent hydrocarbon radical substituted with radicals inert during equilibrium or condensation, R 3 is a C.sub.(1-13) monovalent organic radical, R 6 is a polyvalent aromatic radical selected from ##STR10## R 7 is a C.sub.(1-8) alkyl radical, n is an integer equal to 0 to 100 inclusive and b is a whole number equal to 0 or 1.
Claim 12
Dependent Claim
18 words
A phenol-organopolysiloxane chainstopper which is made by effecting a platinum catalyzed addition between 2-methoxy-4-allylphenol and a hydride polydiorganosiloxane.
Claim 13
Dependent Claim
18 words
A phenol-organopolysiloxane chainstopper which is made by effecting a platinum catalyzed addition between 2-methoxy-4-allylphenol and a hydride polydiorganosiloxane.
Claim 14
Dependent Claim
18 words
A phenol-organopolysiloxane chainstopper which is made by effecting a platinum catalyzed addition between 2-allylphenol and a hydride polydiorganosiloxane.
Claim 15
Dependent Claim
18 words
A phenol-organopolysiloxane chainstopper which is made by effecting a platinum catalyzed addition between 2-allylphenol and a hydride polydiorganosiloxane.
Claim 16
Dependent Claim
35 words
A phenol-organopolysiloxane chainstopper which is made by effecting a platinum catalyzed addition between 4-acetoxystyrene and a hydride polydiorganosiloxane followed by the hydrolysis of the resulting adduct utilizing an alcohol solvent, water and an alkali carbonate.
Claim 17
Dependent Claim
35 words
A phenol-organopolysiloxane chainstopper which is made by effecting a platinum catalyzed addition between 4-acetoxystyrene and a hydride polydiorganosiloxane followed by the hydrolysis of the resulting adduct utilizing an alcohol solvent, water and an alkali carbonate.
References Cited (Backward Citations)
US4695597A
Cited
US4895919A
Cited
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