| abstract |
The invention relates to plastic moldings, in particular transparent plastic moldings which are equipped with a coating of three successively burned-in, chemically different layers, and to a method for producing the equipment. The special equipment significantly improves the scratch, abrasion, weathering and yellowing resistance of the plastic surfaces and maintains the transparency of the molded plastic body. The first layer (primer layer) is made from a hardenable acrylic resin and an aminoplast resin, the second layer from a thermoplastic acrylic resin, a plasticizer and a masked polyisocyanate, and the third layer (top layer) from at least one partially hydrolyzed organosilane, an a.ω-dihydroxy-polydimethyl - siloxane, a silica sol. and at least one masked polvisocyanate as a binder in the presence of a water-soluble organic or inorganic acid. The three-layer coating contains UV absorbers, light stabilizers and, if necessary, conventional auxiliaries. |