US 4,785,040 A · Phenolic molding materials and processes

Abstract

Novel phenolic molding compositions comprise (1) a resole phenolic resin, (2) an alkaline earth metal hydroxide or oxide, and/or a silane compound, and (3) a mixture of clay and talc fillers and/or microballoons. The composition also generally contains a mold release agent, and a silane coupling agent. The alkaline earth metal hydroxide or oxide is preferably calcium and/or magnesium hydroxide or oxide. A mixture of the calcium and magnesium compounds is most preferred. The foregoing molding compositions are applied to glass fibers or filaments to provide compositions useful in sheet molding compound processes, pultrusion processes, filament winding, and continuous laminating processes, as well as in ram injection molding and transfer molding.

Claims39

Dependent claims

A phenolic molding composition comprising

(1) a resole pheolic resin,
(2) an alkaline earth metal hydroxide or oxide, or a mixture of more than one alkaline earth metal hydroxide or oxide or a silane compound, and
(3) a mixture of clay and tac fillers, wherein component (3) is present in said molding composition in a proportion of at least about 20 parts by weight per 100 parts by weight of said pheolic resin.

Dependencies are inferred from the claim text.

Phenolic molding materials and processes

Life of this patent

Phenolic molding materials and processes

Life of this patent

Abstract

Claims39