Abstract: Polyurethane which is reaction product of mixture comprising polyisocyanate and polymer-polyol comprising reaction product of polyol of average molecular weight of at least 500 and that is essentially free of ethylenic unsaturation, epoxy co-reactant essentially free of ethylenic unsaturation, and at least one ethylenically unsaturated monomer reactive with free hydroxyl groups of the polyol and which has been polymerized in the presence of said polyol and epoxy or of an adduct of the polyol and epoxy by free radical addition polymerization to a substantially linear polymer having a molecular weight of at least 5000.

Abstract: Adducts, improved polymer-polyols and improved polyurethane foams are provided. The adducts are produced by reacting suitable polyol and epoxy co-reactant to essentially eliminate all epoxy groups. The polymer-polyol is produced by polymerizing suitable ethylenically unsaturated monomer in the adduct or in the adduct forming mixture, in the later case the adduct forming reaction and the polymerization reaction occur simultaneously to produce the polymer-polyol. Polyurethane foams are produced by the usual method but employing the novel adduct or polymer-polyol of the present invention.

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.

Abstract: 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 adducts are produced by combining polyols and compounds having carboxylic carbon atoms and/or epoxy groups.

Abstract: Adducts, improved polymer-polyols and improved polyurethane foams are provided. The adducts are produced by reacting suitable polyol and epoxy co-reactant to essentially eliminate all epoxy groups. The polymer-polyol is produced by polymerizing suitable ethylenically unsaturated monomer in the adduct or in the adduct forming mixture; in the later case the adduct forming reaction and the polymerization reaction occur simultaneously to produce the polymer-polyol. Polyurethane foams are produced by the usual method but employing the novel adduct or polymer-polyol of the present invention.

Abstract: Bulk polymerized, water insoluble but water swellable polymer of monomers comprising water soluble monoester of acrylic or methacrylic acid with a polyhydric alcohol; and glycidyl methacrylate, and/or glycidyl acrylate, and/or glycidyl crotonate. The polymer may be swelled in aqueous solution to provide a transparent hydrogel having excellent physical properties, and suitable in an ophthalmic lens.

Abstract: A reactive, stable dispersion can be prepared by the in situ polymerization of an ethylenically unsaturated monomer in an appropriate reactive medium such as a polyol. The in situ polymerization produces a dispersed polymer containing reactive radicals. The stable dispersion can be employed in any of a number of reactions, e.g., polyurethane-forming reactions, to introduce into the resultant product, as an integral part thereof, both the polyol and dispersed polymer.

Abstract: .Iadd.This invention provides a method for preparing elastic polyurethanes from organic polyisocyanates and polymer-polyol mixtures, wherein the polymer is obtained by polymerizing an ethylenically unsaturated monomer in a polyol. This invention further provides a method for preparing cellular polyurethanes from organic polyisocyanates and polymer-polyol mixtures, wherein the polymer is obtained by polymerizing an ethylenically unsaturated monomer in a polyol. This invention still further provides polyurethanes produced by the aforementioned methods. .Iaddend.