SE7407768L

1467414 Laminates GENERAL ELECTRIC CO 2 May 1974 [13 June 1973] 19357/74 Heading B5N [Also in Division H5] A laminate comprises, as adhesive interlayer, a block polysiloxane-polycarbonate copolymer made by reacting (A) a halogen chain-stopped polydiorganosiloxane composed of from 5 to 200 chemically combined diorganosiloxy units consisting essentially of dialkylsiloxy units which are connected to each other by silicon-oxygensilicon linkages wherein each of the silicon atoms has two organo radicals attached thereto by a carbon-silicon bond, and (B) a hydric phenol where Z is one or more of hydrogen, a C 1-5 alkyl radical or a halogen radical, and each R is hydrogen, a monovalent hydrocarbon or a halogenated monovalent hydrocarbon radical, and phosgenating the purified reaction product. Preferred block copolymers have the average formula where n is an integer of from 1 to 1000, a is 1 to 200, b is 5 to 200, the ratio of a to b is from 0À05 to 3, d is at least 1, Y is A is hydrogen or R1 si C 1-5 alkyl and R11 is a monovalent hydrocarbon radical or a halogenated hydrocarbon radical. Exemplified laminates consist of: (a) glass, the block copolymer and a polycarbonate, (b) glass, the block copolymer, polycarbonate, the block copolymer and glass; (c) polycarbonate, the block copolymer, polycarbonate, the block copolymer and polycarbonate and (d) glass, the block copolymer, polycarbonate, the block copolymer and polycarbonate. In a preferred embodiment, electrically conducting wires for connection to an alarm or heating system are embedded on the block copolymer. The laminates may be made using an autoclave or a vacuum bag.