Improved method for making mat-molded rim parts.

摘要

Disclosed is a process for the preparation of molded high strength composites comprising fibrous reinforcing material impregnated with a reaction injection molded polyisocyanurate resin. The novel process comprises first evacuating a mold containing the fibrous reinforcing material said mold equipped with means for accepting an overflow volume of the resin. The mold system is pressurized prior to gelation causing the overflow volume to be forced into a final volume. The molded composites are characterised by high flexural moduli, good physical properties, surprisingly low void contents and smooth surfaces. The parts find utility in automotive, appliance, and building construction parts.