Patent ID: 9586865
Date: 2017-03-07
CPC Classifications: C04B

Claim:
1. A method of manufacturing a molded article made from a MDF cementitious composition, the method comprising: preparing a hydrogel pre-polymer blend of saponified polyvinyl alcohol acetate (PVAA) with greater than or equal to about 85% saponified PVAA, and water; mixing the hydrogel pre-polymer blend with high alumina cement (HAC) using a high shear mixing process; mixing in a metallic coagent and a peroxide crosslinking initiator, wherein the metallic coagent is selected from the group comprising zinc diacrylate (ZDA), zinc monoacrylate (ZMA), zinc dimethacrylate (ZDMA), calcium diacrylate (CDA), aluminum triacrylate, magnesium diacrylate, and other metal-bound reactive monomers that may be reacted with peroxides; mixing in an organic acid retardant, wherein the organic acid retardant is selected from the group comprising acetic acid, citric acid, tartartic acid, succinic acid and polymeric acids; and hot press molding the mixture.