Polyol compositions
AssigneeImperial Chemical Industries PLC
InventorDiana M. F. Daems
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Abstract
Polyol blends containing HCFC-22 and basic catalyst, stabilized by the presence of an acid-ended polyester having a molecular weight in the range 300 to 3000 and an acid value in the range 5 to 100 mg KOH/g.
Claims11
Polyol composition comprising a basic catalyst and chlorodifluoromethane, characterised in that the polyol composition further comprises an acid-ended polyester having a molecular weight in the range 300 to 3000 and an acid value in the range 5 to 100 mg KOH/g.
Process for the preparation of a polyurethane or urethane-modified polyisocyanurate foam which comprises reaction of a polyol composition and a polyisocyanate under foam-forming conditions, wherein the polyol composition comprises a basic catalyst and chlorodifluoromethane, characterised in that the polyol composition further comprises an acid-ended polyester having a molecular weight in the range 300 to 3000 and an acid value in the range 5 to 100 mg KOH/g.
Dependencies are inferred from the claim text.