B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
154/111, 204/91.
B29C 35/10 (2006.01) B29C 33/00 (2006.01) B29C 39/20 (2006.01) B32B 17/10 (2006.01) B29C 35/08 (2006.01)
Patent
CA 1272981
ABSTRACT A method of producing safety glass, comprising the steps of polymerizing, in the form of a continuous ribbon, a mixture of polymerizable monomers including a composition of polymerizable monomers, a plasticizer and an effective amount of a catalyst of the azo or peroxy series, between a pair of transparent films of plastic material which is inert to the polymerization reaction and transparent to visible infrared and ultraviolet light, by exposing said polymerizable mixture between said films to a first irradiation with light in the ultraviolet and infrared spectrum range and then subsequently exposing said polymerizable mixture between said films to a second irradiaiton with light in the infrared spectrum range but absent light in said ultraviolet range, the ultraviolet irradiation to which said polymerizable mixture is exposed being no more than about 10% of the total irradiation, the mixture of polymerizable monomers being irradiated for a total of 45 minutes to 3 hours, so as to form a covered elastomeric polymerized resin sheet. Both of the films are removed from the covered elastomeric polymerized resin sheet to form an uncovered elastomeric polymerized resin sheet. The uncovered elastomeric polymerized resin is bonded between two sheets of glass adjacent top and bottom surfaces of said uncovered polymerized resin sheet to form a safety glass.
487495
Fetherstonhaugh & Co.
Meoni Massimo
Polivar S.p.a.
LandOfFree
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