B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/08 (2006.01) B29C 35/02 (2006.01) B29C 69/00 (2006.01) C08J 7/04 (2006.01) C09D 169/00 (2006.01) B32B 31/26 (1990.01)
Patent
CA 2138163
According to the present invention there are obtained improved laminate structures comprising a substrate layer of a thermoplastic resin and a layer of cross-linked carbonate polymer on one or more surface areas. These structures have an excel- lent combination of properties, particulary in the areas of abrasion resistance, adhesion of the layers, weatherability (resistance to UV radiation, humidity, temperature), solvent resistance, hardness, impact strength, color, thermoformability, ignition resistance and recyclability of the article and scrap formed. In a preferred embodiment, the cross-linking in the cross-linked carbonate po- lymer layer is provided by cross-linking moieties, preferably arylcyclobutene moieties, which are terminally located relative to the precross-linked carbonate polymer molecule chains. In general, the cross-linked carbonate polymer layer is required to have a sufficiently high degree of cross-linking and to have sufficiently stable cross-links to provide the necessary abrasion resistance and other properties. The cross-link density of the cross-linked carbonate polymer layer should be such that the percent increase in the polymer Tg after cross-linking (%.DELTA.Tg) is greater than 17 percent.
Logan Jane A,
Marks Maurice J.
Smart & Biggar
The Dow Chemical Company
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