Patent ID: 7767014

Claim:
A mold composition, comprising: a) an amount of alpha gypsum of between about 60% and about 75% (wt./wt.); b) an amount of melamine formaldehyde resin of between about 5% and about 7% (wt./wt.); c) an amount of ammonium chloride of between about 0.1% and about 1.0% (wt./wt.); d) an amount of acrylic copolymer of between about 20% and about 35% (wt./wt.), wherein said acrylic copolymer includes a mixture of acrylic copolymer and water (50:50 wt./wt.); e) and an amount of reinforcement elements stable at temperatures in the range of about 175° F. and about 600° F. of about 0.5% to about 5% (wt./wt.).