B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
117/143
B32B 27/08 (2006.01) B05D 1/38 (2006.01) C08G 18/61 (2006.01) C08J 7/04 (2006.01)
Patent
CA 1205695
PLASTICS MOULDINGS FINISHED WITH A THREE-LAYER COATING AND A PROCESS FOR PRODUCING THE FINISH Abstract of the Disclosure The invention relates to plastics mouldings, more particularly transparent plastics mouldings, which are finished with a coating of three successively stored, chemically different layers, and to a process for producing the finish. The special finish considerably improves the scratch resistance, abrasion resistance, weathering resistance and yellowing resistance of the plastics surfaces without affecting the transparency of the plastics moulding. The first layer (primer layer) is produced from a hardenable acrylic resin and an aminoplast resin, the second layer from a thermoplastic acrylic resin, a plasticiser and a masked polyisocyanate and the thid layer (cover layer) from at least one partially hydrolysed organosilane, an .alpha.,.omega.-dihydroxy polydimethyl siloxane, a silica sol and at least one masked polyisocyanate as binder in the presence of a water-soluble organic or inorganic acid. The three- layer coating contains UV-absorbers, light stabilisers and, optionally, standard auxiliaries.
418392
Schmid Helmut
Schonfelder Manfred
Steinberger Helmut
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
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