METHOD FOR PRODUCING A POLYCARBONATE LAYERED COMPOSITE

European Patent Office Patent

PATENT NO 2205436
APP PUB NO EP-2205436-A1
SERIAL NO

08843351

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Abstract

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The invention relates to a method for making a structure with at least a first polymer layer and a second polymer layer, each made from a polycarbonate polymer based on bisphenol A, and in between the first polymer layer and the second polymer layer an intermediate layer being arranged, comprising the following steps: a) the intermediate layer is applied at least on a partial region of the first polymer layer, b) optionally the intermediate layer is dried, c) the first polymer layer is coated on the side, on which the intermediate layer is arranged, with a liquid preparation comprising a solvent or a mixture of solvents and a polycarbonate derivative based on a geminally disubstituted dihydroxydiphenyl cycloalkane, the preparation covering the intermediate layer, d) optionally a drying step is made after step c), e) after step c) or step d), the second polymer layer is placed on the first polymer layer, covering the intermediate layer, f) the first polymer layer and the second polymer layer are laminated with each other under pressure, at a temperature from 120° C. to 230° C. and for a defined time.

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Patent Owner(s)

Patent OwnerAddress
BUNDESDRUCKEREI GMBHDE10969 BERLIN

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Inventor(s)

Inventor Name Address
KNEBEL MICHAEL 13086 BERLIN
MUTH OLIVER 12277 BERLIN
PUDLEINER HEINZ KREFELD
MEYER KLAUS DORMAGEN
EHREKE JENS BERLIN
LEOPOLD ANDRÉ BERLIN
SEIDEL RAINER 13467 BERLIN
PAESCHKE MANFRED WANDLITZ
YESILDAG CENGIZ 51377 LEVERKUSEN

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