Method of reducing the viscosity of polyester-alumina _trihydrate dispersions by slight dehydration of trihydrate

摘要

An improved process for dispersing alumina trihydrate in a polyester resin is disclosed wherein the improvement comprises lowering the viscosity of the polyester-trihydrate dispersion by dehydrating the alumina trihydrate to a reduction in the initial loss on ignition in a range of from 0.2 to 5.0 percent prior to adding the trihydrate to the polyester resin.