Abstract: Novel sytrene resin compositions, especially styrene-acrylonitrile resin and styrene-acrylonitrile-butadiene resin compositions, are provided, which comprise a styrene resin having blended therein as lubricant at least one of the compounds represented by the following general formula: ##EQU1## wherein R and R' each represent hydrogen or a straight chain, saturated alkyl radical, the sum of the carbon atoms in both radicals R and R', being 14-42.This application is a division of application Serial No. 376,318, filed July 5, 1973, now U.S. Pat. No. 3,883,464, which in turn is a continuation-in-part of application Ser. No. 212,787, filed Dec. 27, 1971, now U.S. Pat. No. 3,817,900.