(C16-C18) and (C18) Unsaturated alkylcarboxylic acids, phthalic anhydride, pentaerythritol, ethylene glycol, maleic anhydride polymer 68952-28-3 Fatty acids, C16-18 and C18-unsatd, polymers with ethylene glycol,maleic anhydride, pentaerythritol and phthalic anhydride