Low pressure acrylic molding composition with fiber reinforcement
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United States of America Patent
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May 5, 1998
Issued Date -
N/A
app pub date -
Mar 28, 1996
filing date -
Apr 26, 1995
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Abstract
A fiber reinforced acrylic molding composition is provided which can be molded under low pressures and temperatures to provide thermoset articles. The molding composition can be prepared before use and is shelf stable. The molding composition contains liquid reactive components and a high molecular weight solid acrylic resin which is amorphous and thermoplastic and in the form of large particles. These features enable the solid acrylic resin to slowly absorb the liquid reactive component. The acrylic resin functions as a thickener which delays the viscosity build allowing fiber reinforcement to be incorporated before molding. The molding composition is well suited for use in dentistry and other fields where small amounts or molding composition are used occasionally.
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