Process for making multilayered, formable laminates
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United States of America Patent
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Jan 9, 1990
Grant Date -
N/A
app pub date -
Oct 7, 1987
filing date -
Oct 7, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for making a multilayered formable plastic composite laminate and a process for its manufacture which includes preparing an acrylic composition which includes the reaction product of a mixture of predominantly an acrylic monomer and a substantially lesser amount of a polymer thereof, at least one free radical reaction initiating reaction catalyst, and optionally, 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 composition in several successive stages so as to substantially polymerize the acrylic monomer and to permit penetration of the acrylic composition preferably to a depth of between about 0.001-0.1 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.
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