Attenuation of polymer substrate degradation due to ultraviolet radiation
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United States of America Patent
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Nov 5, 1996
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app pub date -
May 26, 1995
filing date -
Sep 27, 1991
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Abstract
Improved methods and polymer compositions are provided whereby ultraviolet radiation degradation of substrates formed of the compositions is attenuated.In accordance with the invention, ultraviolet scattering and absorbing particles having a particle size in the range of from about 0.001 micrometer to about 0.20 micrometer in diameter are dispersed in at least a surface layer of a polymer substrate.
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