| 摘要 |
<p>1398359 Coated products BAYER AG 25 May 1973 [26 May 1972] 25137/73 Addition to 1370480 Heading B2E A laminate comprising a substrate of an impact-resistant clear first plastics material coated on one or both sides with a second plastics material having a coefficient of static friction not more than 0.5, a modulus of elasticity between 200 and 2,000 Kp/cm<SP>2</SP>, a maximum tolerated surface-limiting work in the linear region of the stress-strain diagram, determined from a high-speed tear test at 10 m/sec on a test rod according to Buchmann of less than 2500 m.Kp . 1 and a speed of s cm<SP>2</SP> recovery after being stressed of 1-10 m/sec, is produced by applying to the first plastics material a solution of the second plastics material to which a solution of a cellulose ester, e.g. cellulose acetobutyrate, or a silicone oil has been admixed. The first plastics material is a polycarbonate, polyethylene glycol terephthalate, an unsaturated polyester, polyether, e.g. polyphenylene oxide, polysulphone, polyamide, plasticised or unplasticised cellulose ester, polymethyl methacrylate methyl methacrylate copolymer, polymethyl pentene-1, polydiethylene glycol-bis-allyl carbonate or epoxide resin. The cellulose ester may be used as a 5-40% by weight solution and the silicone oil as a 0.1-10% by weight solution in ethyl acetate, methylene chloride, acetone or mixture thereof. 0.5-5% by weight of cellulose ester or 0.01-2% by weight of silicone oil may be used based on the weight of the second plastics material. The coating solution which may also contain orthoformic acid triethyl ester and/or 2-cyclohexyl-6-tert.- butyl-p-cresol, is preferably applied by casting. The second plastics material is preferably a polyurethane used in admixture with dibutyl tin dilaurate.</p> |
