Patent ID: 7078451

Claim:
A two-part low viscosity sheet molding compound comprising: an A-side premix including: 40–100 parts per hundred resin of a thermosetting resin selected from the group consisting of a polyester thermosetting resin and a vinylester thermosetting resin; 0.25–10 parts per hundred resin of a free radical generating catalyst; 100–300 parts per hundred resin of a filler material; 0–20 parts per hundred resin of divinyl benzene; 0–60 parts per hundred resin of a thermoplastic low shrink additive; and a first portion of a mold release agent; and a B-side premix including: 0.1–10 parts per hundred resin of zinc oxide; 0.1–10 parts per hundred resin of calcium hydroxide; 0–20 parts per hundred resin of a pigment; 0–1 part per hundred resin of an inhibitor matched for storage and molding temperature; and a second portion of said mold release agent; wherein said A-side premix and said B-side premix are stored separately and are combined before compounding said sheet molding compound; and wherein said first and second portion of said mold release agent results in an addition of 1–20 parts per hundred resin of said mold release agent in said sheet molding compound.