Acrylic sheet having uniform distribution of coloring and mineral filler before and after thermoforming
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United States of America Patent
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May 5, 1998
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N/A
app pub date -
Mar 22, 1996
filing date -
Nov 26, 1993
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Abstract
Ranges of chain-transfer agents, thixotropic agents, and alumina trihydrate content are balanced to minimize migration or maldistribution of coloring matter and alumina trihydrate during curing of methyl methacrylate in a syrup including polymethylmethacrylate and also during subsequent heating and deformation in thermoforming, to achieve constancy of impact resistance and improve stability of patterns even in deformed portions of formed sheets.
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