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Copolycarbonate-based composition

A technology of copolycarbonate and composition, applied in the field of molded parts, thermoplastic polycarbonate composition

Inactive Publication Date: 2009-09-09
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has never been indicated in the prior art that such copolycarbonates can be advantageously used in polycarbonate blends while still maintaining their exceptionally good low temperature properties

Method used

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  • Copolycarbonate-based composition
  • Copolycarbonate-based composition
  • Copolycarbonate-based composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0160] Components:

[0161] A1 Copolycarbonate of 30mol% 4,4'-dihydroxybiphenyl (DOD) and 70mol% bisphenol A

[0162] Ester, average molecular weight 24970 (weight average), measure by gas permeation chromatography

[0163] set, based on polystyrene

[0164] A2Same copolycarbonate as A1, just is 25620

[0165] A3 Same copolycarbonate as A1, just is 25190

[0166] A4 Same copolycarbonate as A1, just is 25050

[0167] A5 Bisphenol A based polycarbonate ( 2600, Bayer Corporation,

[0168] Leverkusen, Germany)

[0169] B Graft polymer, by 40 parts by weight styrene and acrylonitrile according to the ratio of 73:27

[0170] Example of the copolymer, grafted to 60 parts by weight of granular cross-linked polybutadiene rubber

[0171] (d 50 =0.34μm), the rubber is prepared by emulsion polymerization

[0172] C Styrene / acrylonitrile copolymer with a styrene / acrylonitrile ratio of 72:28,

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Abstract

This invention relates to thermoplastic copolycarbonate compositions and shaped objects containing the same having improved stress crack resistance and thermal stability.

Description

technical field [0001] The present invention relates to thermoplastic polycarbonate compositions and moldings containing them having improved stress crack resistance and thermal stability. Background technique [0002] The stress-crack resistance of molded parts made of polymers is always an important indicator both in their production and in the use of the molded parts if they are to come into contact with oils, cleaning agents and alcohols. Particularly in automobile construction or other exterior applications, moldings with the highest possible chemical resistance and, on the one hand, stability at low temperatures and, on the other hand, high thermal stability on the other hand have been sought for a long time. The aim now was therefore to find a polycarbonate blend which, on the one hand, exhibits better performance than polycarbonate-containing polycarbonate prepared with pure 2,2-bis(4-hydroxyphenyl)propane as bisphenol The improved stress cracking resistance and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L51/04C08G64/06C08K5/49C08L25/02C08L33/06C08L101/00
CPCC08L69/00C08L25/02C08L51/04C08G64/06C08L33/06C08L2666/14C08L51/00C08L2666/02
Inventor H·瓦斯T·埃克尔D·维特曼S·克拉特施默
Owner COVESTRO DEUTSCHLAND AG