EP0046558A2
Expired / Lapsed
EP
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Flame retardant alkylated aromatic polycarbonate compositions
Assignee: Bayer Corp
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Filing: 1981-08-17
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Granted: —
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Expires: 2001-08-17
Abstract
Abstract A flame resistant polycarbonate blend comprising an alkylated aromatic polycarbonate and a sulfur-bearing compound characterized in exhibiting V-0 flame resistance classification, according to UL-94, is provided. Further provided is a process for the preparation of such blend.
Inventors
- 👤 Sivaram Krishnan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 04:30
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
Mixtures of A) polycarbonates consisting of structural units of formula I wherein R is CH 3 , C 2 H 5 or C 3 H 7 and wherein X is and n is at least 15 and B) halogenfree copolycarbonates (II) from bis-(4-hydroxyphenyl)-sulfide, bis-(4-hydroxyphenyl)-sulfoxide or bis-(4-hydroxyphenyl)-sulfone with other diphenols of structural formula (III) where Y is C 1 - C 5 , alkylene or C 2 - C 5 alkylidene or a single bond or -CO- and whereby the diphenol of formula (III) in 97 - 40 mol-% , based on the total amount of bisphenol of formula (III) and the sulfur- containing bisphenols, reacted into the polycarbonate backbone, so that the sulfur content of the final blend from (I) and (II) lies in between 0,1 and 5 weight percent.
Claim 2
Dependent Claim
130 words
Mixtures of A) polycarbonates consisting of structural units of formula I wherein R is CH 3 , C 2 H 5 or C 3 H 7 and wherein X is and n is at least 15 and B) halogenfree copolycarbonates (II) from bis-(4-hydroxyphenyl)-sulfide, bis-(4-hydroxyphenyl)-sulfoxide or bis-(4-hydroxyphenyl)-sulfone with other diphenols of structural formula (III) where Y is C 1 - C 5 , alkylene or C 2 - C 5 alkylidene or a single bond or -CO- and whereby the diphenol of formula (III) in 97 - 40 mol-% , based on the total amount of bisphenol of formula (III) and the sulfur- containing bisphenols, reacted into the polycarbonate backbone, so that the sulfur content of the final blend from (I) and (II) lies in between 0,1 and 5 weight percent.
Claim 3
Dependent Claim
25 words
Mixtures according to claim 1 wherein the sulfur content in the final blend lies between 0,25 and 5 weight percent, based on the total mixtures.
References Cited (Backward Citations)
No citation records indexed.
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