Flame retardant slabstock polyurethane foam composition

Abstract

A flame retardant slabstock polyurethane foam composition includes polyol and polyisocyanate as main ingredients and an ordinary additive, excluding a flame retardant, for forming polyurethane foams. The polyol is bio-polyetherpolyol derived from vegetable oil and comprises 50% to 90% by weight of polyetherpolyol (A) having a weight average molecular weight of 3,000 to 6,000 g/mol and 10% to 50% by weight of polyetherpolyol (B) having a weight average molecular weight of 500 to 1,000 g/mol. An isocyanate index of the polyol defined by the following Equation 1 is 70 to 95 Isocyanate   Index = Number   of   moles   of   iscocyanate   groups   ( NCO ) Number   of   moles   of   hydroxyl   ( OH )   groups × 100. [ Equation   1 ]

Dependencies are inferred from the claim text.