Modified polycarbonate resin
AssigneeGTE Sylvania Incorporated
InventorJohn W. Shaffer
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Abstract
A polycarbonate resin having an acidic additive for providing improved resistance to stress cracking under humid conditions while retaining tensile and impact strength at elevated temperatures.
Claims6
A polycarbonate resin modified to counteract any alkali-catalyzed hydrolysis of the resin to thereby prolong the time to failure of said resin under conditions of high humidity and high mechanical stress, said modified resin consisting essentially of a homogeneous mixture of from about 70 to 99.9 percent by weight of a polycarbonate resin and from about 0.1 to 30 percent by weight of a compatible acidifying agent consisting of an organic carboxylic acid having a first ionization pKa value in a range of from about 1.0 to 6.5 or an anhydride thereof.
Dependencies are inferred from the claim text.