THERMOPLASTIC LOW-PROFILE ADDITIVES AND USE THEREOF IN POLYESTER RESIN COMPOSITIONS

摘要

23020A - 33 THERMOPLASTIC LOW-PROFILE ADDITIVES AND USE THEREOF IN UNSATURATED POLYESTER RESIN COMPOSITIONS A low-profile additive composition is disclosed which comprises ethylene glycol, at least one nonpolar diol, adipic acid and trimellitic anhydride. The low-profile additive, when included in an unsaturated polyester resin systems, for use in making sheet molding compositions, provides improved processing characteristics such as viscosity thickening plateau, paste viscosity and phase separation during maturation when the unsaturated polyester.