Impact resistant laminate

Claim 2

Impact or shock resistant laminate comprising a plurality of impact or shock receiving layers selected from the group consisting of polycarbonates, glasses, and solid resinous materials other than polycarbonates, including a back polycarbonate lamina opposite the direction of impact or shock, said back polycarbonate lamina having a mar-resistant coating 0.05 to 1 mils thick and which is harder and relatively more brittle than the underlying polycarbonate layer opposite the direction of impact, said back polycarbonate lamina having a thickness from about 30 mils to about 220 mils, the laminae being bonded together by a compatible adhesive.

Claim 3

A laminate according to claim 1 wherein at least the back polycarbonate lamina is bonded to the adjacent lamina with an adhesive of block polysiloxanepolycarbonate copolymer prepared by reacting (A) a halogen chain-stopped polydiorganosiloxane composed of from about 5 to 200 chemically combined diorganosiloxy units consisting essentially of dialkylsiloxy units which are connected to each other by silicon-oxygen-silicon, linkages wherein each of the silicon atoms has two organo radicals attached through a carbon-silicon bond, and (B) a dihydric phenol having the formula ##STR6## where Z is a member selected from the class consisting of hydrogen, lower alkyl radicals and halogen radicals and combinations thereof, and R is a member selected from the class consisting of hydrogen, hydrocarbon and halogenated radicals, and phosphenating the purified reaction product.

Claim 4

A laminate as in claim 1 wherein the solid resinous material is acrylic based.

Claim 5

A laminate as in claim 1 wherein the mar-resistant coating is limited to the outer or exposed laminate surfaces.

Claim 6

A laminate as in claim 1 which is symmetrical having outer plies of polycarbonate of controlled thickness coated with mar-resistant coating.

Claim 7

Impact shock resistant laminate comprising a front or impact shock resistant layer selected from the group consisting of glass and polycarbonate and a plurality of polycarbonate laminae including a back polycarbonate lamina opposite the direction of impact or shock, said back polycarbonate lamina having a 0.05 to 1 mils thick mar-resistant coating harder and relatively more brittle than the underlying polycarbonate layer opposite the direction of impact, said back polycarbonate lamina having a thickness of from about 30 mils to about 220 mils, the laminae of said laminate being adhered together with interlayers of a block polysiloxane-polycarbonate copolymer prepared by reacting (A) a halogen chain-stopped polydiorganosiloxane composed of from about 5 to 200 chemically combined diorganosiloxy units consisting essentially of dialkylsiloxy units which are connected to each other by silicon-oxygen-silicon linkages wherein each of the silicon atoms has two organo radicals attached through a carbon-silicon bond, and (B) a dihydric phenol having the formula ##STR7## where Z is a member selected from the class consisting of hydrogen, lower alkyl radicals and halogen radicals and combinations thereof, and R is a member selected from the class consisting of hydrogen, hydrocarbon and halogenated hydrocarbon radicals, and phosgenating the purified reaction product.

Claim 8

Impact shock resistant laminate comprising a front or impact shock resistant layer selected from the group consisting of glass and polycarbonate and a plurality of polycarbonate laminae including a back polycarbonate lamina opposite the direction of impact or shock, said back polycarbonate lamina having a 0.05 to 1 mils thick mar-resistant coating harder and relatively more brittle than the underlying polycarbonate layer opposite the direction of impact, said back polycarbonate lamina having a thickness of from about 30 mils to about 220 mils, the laminae of said laminate being adhered together with interlayers of a block polysiloxane-polycarbonate copolymer prepared by reacting (A) a halogen chain-stopped polydiorganosiloxane composed of from about 5 to 200 chemically combined diorganosiloxy units consisting essentially of dialkylsiloxy units which are connected to each other by silicon-oxygen-silicon linkages wherein each of the silicon atoms has two organo radicals attached through a carbon-silicon bond, and (B) a dihydric phenol having the formula ##STR7## where Z is a member selected from the class consisting of hydrogen, lower alkyl radicals and halogen radicals and combinations thereof, and R is a member selected from the class consisting of hydrogen, hydrocarbon and halogenated hydrocarbon radicals, and phosgenating the purified reaction product.

Claim 9

A laminate as in claim 6 wherein said back polycarbonate layer is from about 30 mils to about 150 mils thick.

Claim 10

A laminate as in claim 6 wherein said impact shock receiving layer is glass.

Claim 11

A laminate as in claim 6 wherein the impact shock receiving layer is a polycarbonate.

Claim 12

A laminate as in claim 6 wherein said back polycarbonate layer is coated on both sides with said mar-resistant coating.