Half-ester adducts and polymer-polyols useful in the preparation of improved plastics, including polyurethane foams, elastomers and the like
AssigneeUnion Carbide Corporation
InventorPaul Stamberger
Life of this patent
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Abstract
Half-ester adducts and improved polymer-polyols, both useful in the production of polyurethane foams and other synthetic materials are provided, as well as synthetic end products. The half-ester adducts are produced by reaction between polyols and polycarboxylic compounds including dibasic carboxylic acids and dibasic carboxylic anhydrides.
Claims11
A polyurethane which is the reaction product of a mixture comprising an organic polyisocyanate and the polymer-polyol comprising a mixture of:
- (A) a minor percentage by weight of a half-ester adduct formed by reaction of a first polyol with a co-reactant selected from the group consisting of dibasic carboxylic acids, dibasic carboxylic anhydrides and mixtures thereof,
- in which a substantial percentage of the carboxylic carbon atoms of the co-reactant remain unreacted after reaction with the polyol, the KOH equivalent of the half-ester adduct being in the range from about 4 to about 16 milligrams per gram;
- (B) a second polyol;
- and
- (C) at least one ethylenically unsaturated monomer which is reactive with free hydroxyl groups of the first and second polyols,
- in which (C) has been polymerized in (A) and (B) by free radical addition polymerization to a substantially linear polymer having a molecular weight of at least about 5,000 to provide a liquid, stable dispersion of polymer-polyol.
A method of producing a polyurethane comprising copolymerizing a mixture comprising an organic polyisocyanate and the polymer-polyol comprising a mixture of:
- (A) a minor percentage by weight of a half-ester adduct formed by reaction of a first polyol with a co-reactant selected from the group consisting of dibasic carboxylic acids, dibasic carboxylic anhydrides and mixtures thereof,
- in which a substantial percentage of the carboxylic carbon atoms of the co-reactant remain unreacted after reaction with the polyol, the KOH equivalent of the half-ester adduct being in the range from about 4 to about 16 milligrams per gram;
- (B) a second polyol;
- and
- (C) at least one ethylenically unsaturated monomer which is reactive with free hydroxyl groups of the first and second polyols,
- in which (C) has been polymerized in (A) and (B) by free radical addition polymerization to a substantially linear polymer having a molecular weight of at least about 5,000 to provide a liquid, stable dispersion of polymerpolyol.
Dependencies are inferred from the claim text.