B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1072
B29C 43/56 (2006.01) B29C 51/16 (2006.01) B29C 67/24 (2006.01) C08J 5/18 (2006.01) B29C 51/10 (2006.01)
Patent
CA 2040055
Mo-3540 LeA 27,593 A PROCESS FOR THE PRODUCTION OF FILMS FOR INTERNALLY LINING PLASTIC MOLDS AND THE USE OF THE MOLDS THUS LINED ABSTRACT OF THE DISCLOSURE The present invention is directed to a process for the production of films for internally lining molds for the production of film-clad plastic moldings by vacuum forming at temperatures above 20°C using quasi-thermoplastic films having a maximum thickness of 1 mm. The quasi-thermoplastic films used is based on a polyisocyanate polyadduct having a density of at least 0.6 g/cm3 which has been obtained by reaction of organic polyisocyanates, compounds having molecular weights of 1,800 to 12,000 which contain a statistical average of at least 2.5 isocyanate-reactive groups, and at least 5% by weight of one or more compounds selected from the group consisting of 1) diamines containing two primary and/or secondary aromatically bound amino groups and having molecular weights in the range from 108 to 400, 2) aliphatic polyols, which may contain ether groups and which have molecular weights of from 60 to 1799, 3) cycloaliphatic polyols, which may contain ether groups and which have molecular weights of from 60 to 1799, 4) aliphatic polyamines, which may contain ether groups and which have molecular weights of from 60 to 1799, 5) cycloaliphatic polyamines, which may contain ether groups and which have molecular weights in the range from 60 to 1,799 at an isocyanate index of 60 to 140 by reaction injection molding using closed sheet molds having a maximum height of 1 mm. Mo-3540
Dorner Karl H.
Rasshofer Werner
Wagner Joachim
Aktiengesellschaft Bayer
Dorner Karl H.
Rasshofer Werner
Swabey Ogilvy Renault
Wagner Joachim
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