Polyurea/urethane optical material and method for making it
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United States of America Patent
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app pub date -
Nov 11, 2004
filing date -
Feb 24, 2003
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Abandoned
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Abstract
A polyurea/urethane material and method for making it provides for improved optical parts. The material allows for ease of manufacture of parts having good optical properties, high hardness, low density, and good impact resistance. The method provides for related manufacturing advantages.
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