Method of preparing polyurethanes from liquid, stable, reactive, filmforming polymer/polyol mixtures formed by polymerizing an ethylenically unsaturated monomer in a polyol

Claim 1

A METHOD FOR PREPARING POLYURETHANES COMPRISING REACTING (A) A LIQUID, STABLE REACTIVE POLYMER-POLYOL MIXTURE HAVING A VISCOSITY OF LESS THAN ABOUT 40,000 CPS. AT 10% POLYMER CONCENTRATION AND HAVING A COMBINING WEIGHT IN A RANGE YIELDING ELASTIC-TO-RIGID POLYURETHANE PRODUCTS, THE ESSENTIAL COMPONENTS OF SAID REACTICE MIXTURE CONSISTING OF (1) A SUBSTANTIAL BUT MINOR AMOUNT OF FILM FORMING POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 5,000 AND HAVING A PLURALITY OF RADICALS CONTAINING ACTIVE HYDROGEN ATOMS WHICH ARE REACTIVE WITH THE -N=C=O RADICALS OF AN ORGANIC POLYISOCYANATE AND (2) A MAJOR AMOUNT OF A SOLVENT MEDIUM FOR SAID POLYMER CONSISTING ESSENTIALLY OF AT LEAST ONE NORMALLY LIQUID POLYOL ESSENTIALLY FREE FROM ETHYLENIC UNSATURATION AND HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 500, SAID POLYMER (1) BEING THE POLYMERIZATE OBTAINED BY POLYMERIZING, TO A MOLECULAR WEIGHT OF AT LEAST 5,000 AND TO A SOLIDS CONCENTRATION OF ABOUT 10% TO ABOUT 50% BY WEIGHT, AN ETHYLENICALLY UNSATURATED MONOMER IN SUCH POLYOL, WITH (B) AN ORGANIC POLYISOCYANATE TO FORM SUCH POLYURETHANE, THE RATIO OF THE -N=C=O EQUIVALENTS OF (B) TO THE EQUIVALENTS OF REACTIVE RADICALS OF (A) BEING IN THE RANGE OF ABOUT 1-5 TO 1.

Claim 2

A METHOD FOR PREPARING POLYURETHANES COMPRISING REACTING (A) A LIQUID, STABLE REACTIVE POLYMER-POLYOL MIXTURE HAVING A VISCOSITY OF LESS THAN ABOUT 40,000 CPS. AT 10% POLYMER CONCENTRATION AND HAVING A COMBINING WEIGHT IN A RANGE YIELDING ELASTIC-TO-RIGID POLYURETHANE PRODUCTS, THE ESSENTIAL COMPONENTS OF SAID REACTICE MIXTURE CONSISTING OF (1) A SUBSTANTIAL BUT MINOR AMOUNT OF FILM FORMING POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 5,000 AND HAVING A PLURALITY OF RADICALS CONTAINING ACTIVE HYDROGEN ATOMS WHICH ARE REACTIVE WITH THE -N=C=O RADICALS OF AN ORGANIC POLYISOCYANATE AND (2) A MAJOR AMOUNT OF A SOLVENT MEDIUM FOR SAID POLYMER CONSISTING ESSENTIALLY OF AT LEAST ONE NORMALLY LIQUID POLYOL ESSENTIALLY FREE FROM ETHYLENIC UNSATURATION AND HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 500, SAID POLYMER (1) BEING THE POLYMERIZATE OBTAINED BY POLYMERIZING, TO A MOLECULAR WEIGHT OF AT LEAST 5,000 AND TO A SOLIDS CONCENTRATION OF ABOUT 10% TO ABOUT 50% BY WEIGHT, AN ETHYLENICALLY UNSATURATED MONOMER IN SUCH POLYOL, WITH (B) AN ORGANIC POLYISOCYANATE TO FORM SUCH POLYURETHANE, THE RATIO OF THE -N=C=O EQUIVALENTS OF (B) TO THE EQUIVALENTS OF REACTIVE RADICALS OF (A) BEING IN THE RANGE OF ABOUT 1-5 TO 1.