POLYCARBONATE HAVING A LOW SHEAR THINNING RATIO

The invention relates to a polycarbonate which is polymerised by fusion and has a shear thinning ratio (y) defined by the limiting values of the following equation: (Q) c + axb > y > -c+ax b provided that y >= 1; a, b and c are constants; c = 0.3 to 0. 1; b = 14.831 ± 0.05 to 0.02; a = 0.12...

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Bibliographic Details
Main Authors KUEHLING STEFFEN, HUCKS UWE, MASON JAMES, KRATSCHMER SILKE, KAUTH HERMANN
Format Patent
LanguageEnglish
Published 09.05.2008
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:The invention relates to a polycarbonate which is polymerised by fusion and has a shear thinning ratio (y) defined by the limiting values of the following equation: (Q) c + axb > y > -c+ax b provided that y >= 1; a, b and c are constants; c = 0.3 to 0. 1; b = 14.831 ± 0.05 to 0.02; a = 0.1262 ± 0.005 to 0.003; and x represents the relative viscosity of the polycarbonate. Said polycarbonate has the same flow behaviour as a linear polycarbonate of comparable molecular weight, obtained according to the interfacial method.
Bibliography:Application Number: KR20087010030