B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
117/202
B32B 27/08 (2006.01) B29C 51/14 (2006.01) C08J 5/12 (2006.01)
Patent
CA 1332900
A multilayered formable plastic composite laminate and a process for its manufacture which comprises preparing an acrylic composition comprising the reaction product of a mixture of predominantly an acrylic monomer and a substan- tially lesser amount of a polymer thereof, at least one free radical reaction initiating reaction catalyst, and option- ally, a chain length regulating agent or a cross-linking agent; deaerating the acrylic composition; casting the deaerated acrylic composition upon a sheet or laminate of a thermoplastic material; and curing the cast acrylic composi- tion in several successive stages so as to substantially polymerize the acrylic monomer and to permit penetration of said acrylic composition preferably to a depth of between about 0.001-0.100 inch into thermoplastic material to form a laminate having a uniform and gradual acrylic/ thermoplastic interphase, rather than a sharp separation between the layers thereof, so as to prevent delamination during further processing operations. These laminates are then thermoformed into various shaped articles.
578573
Guerra Carlos
Johnson Mark
Lee John
Osler Hoskin & Harcourt Llp
Spartech Polycast Inc.
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