Patent ID: 7928151
Filing Date: 2011-04-19
Classification: B22C

Abstract:
1. A resin composition for a shell mold comprising a phenolic resin and an aromatic condensed phosphate ester, wherein the phenolic resin includes a blend of a novolak phenolic resin and a resol phenolic resin, and the aromatic condensed phosphate ester is selected from the group consisting of α-diphenoxyphosphoryl-ω-phenoxypoly (n=1 to 3) [oxy-1,4-phenyleneisopropylidene-1,4-phenyleneoxy(phenoxyphosphoryl)], phenylenebis(phenylcresolphosphate), 2,2-bis{4-[bis((mono- or di-)methylphenoxy)phosphoryloxy]phenyl}propane, 1,3phenylenebis (dixylenyl)phosphate, a compound represented by a following formula (I): wherein R and mixtures thereof.