VERFAHREN ZUR HERSTELLUNG VON MEHRSCHICHTIGEN KUNSTSTOFFTAFELN

Multilayer plastic sheets comprising a core layer and at least one outer layer containing 1 to 15 wt. % UV absorbers are produced by coextrusion of branched Si-free polycarbonates of 2,2-bis-(4-hydroxy)-propane, the branched polycarbonate having a weight average molecular weight of 27,000 to 29,500.

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Bibliographic Details
Main Authors LOEWER HARTMUT, ANDERS SIEGFRIED, KIRSCH JUERGEN, VERHOEVEN WERNER, KUEHLING STEFFEN
Format Patent
LanguageGerman
Published 15.05.1996
Edition6
Subjects
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
CHEMISTRY
COMPOSITIONS BASED THEREON
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS
LAYERED PRODUCTS
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Summary:Multilayer plastic sheets comprising a core layer and at least one outer layer containing 1 to 15 wt. % UV absorbers are produced by coextrusion of branched Si-free polycarbonates of 2,2-bis-(4-hydroxy)-propane, the branched polycarbonate having a weight average molecular weight of 27,000 to 29,500.
Bibliography:Application Number: AT53395