ALKOXYLATED PHOSPHATE ESTERS FOR USE AS INTERNAL MOLD RELEASE AGENTS AND VISCOSITY MODIFIERS

摘要

The present invention relates to the use of alkoxylated phosphate esters as internal mold release agents and/or viscosity modifiers in polyester resin compositions, plastic parts comprising such resin compositions and methods of manufacturing said plastic parts. The alkoxylated phosphate esters disclosed herein are virtually free of acid and are capable of functioning as both internal mold release agents and viscosity modifiers in filled polyester resin systems. Additionally, the use of the alkoxylated phosphate esters in accordance with the instant invention provides for dramatically reduced corrosion of metal parts (e.g., a metal mold) which come in contact with the resin compositions during production of thermoset composites. The instant invention further relates to a process for preparing pultruded parts utilizing said alkoxylated phosphate esters. The alkoxylated phosphate esters generally display excellent viscosity reduction properties without the use of chlorinated solvents or styrene diluents associated with conventional polyester resin viscosity reducing agents.