Patent ID: 9463584
Filing Date: 2016-10-11
CPC Classification: B29C

Claim Text:
1. A process for molding a thermoset sheet molding composition comprising: applying a silsesquioxane monomer of RSi(OH) curing via condensation silanol functionality in said silsesquioxane monomer to form Si—O—Si bonds and form a silsesquioxane polymer mold release coating on the mold surface that is stable to SMC molding conditions; introducing the thermoset sheet molding composition into the mold, the thermoset sheet molding composition containing monomers and fibers, and into contact with said mold release coating under conditions to cure the thermoset sheet molding composition to form a molded article, the fibers being glass, carbon, or a combination thereof; removing the molded article from the mold and introducing another thermoset sheet molding composition into the mold to form another article without the addition of more silsesquioxane monomer to the mold surface; wherein said silsesquioxane monomer is a mixture of 5 to 40 percent by weight of silsesquioxane monomers having an average molecular weight of between 55 and 700 and a remainder of coating precursors have a molecular weight in the range of between 200 and 4000.