Method of making a copolymer of a vinyl monomer and a polyester containing trivalent prosphorus incorporated therein by ester linkage

Claim 1

THE METHOD OF MAKING A COMBUSTION RESISTANT COPOLYMER CONTAINING AT LEAST 1.5 PERCENT BY WEIGHT OF PHOSPHORUS WHICH COMPRISES COPOLYMERIZING (A) A VINYL MONOMER, AND (B) AN OLEFINICALLY UNSATURATED POLYESTER CONTAINING TRIVALENT PHOSPHORUS INCORPORATED INTO THE MOLECULE BY ESTER LINKAGES AND OBTAINED BY HEATING, AT A TEMPERATURE BETWEEN ABOUT 90*C. AND ABOUT 200*C., A PHOSPHOROUS ACID ALKYL ESTER HAVING AT LEAST TWO ALKYL GROUPS OF FROM ONE TO FOUR CARBON ATOMS, A SATURATED POLYHYDRIC ALCOHOL, AND AN ESTER OF A MONOHYDRIC ALCOHOL AND, AN A,B-UNSATURATED POLYCARBOXYLIC ACID, SAID PHOSPHOROUS ACID ALKYL ESTER BEING PRESENT IN THE REACTION MIXTURE IN AN AMOUNT UP TO 90 MOL PERCENT OF THE HYDROXY GROUPS OF SAID POLYHYDRIC ALCOHOL SUCH THAT THE POLYESTER PRODUCT FORMED CONTAINS AT LEAST 1.5 PERCENT BY WEIGHT OF PHOSPHORUS.

Claim 2

THE METHOD OF MAKING A COMBUSTION RESISTANT COPOLYMER CONTAINING AT LEAST 1.5 PERCENT BY WEIGHT OF PHOSPHORUS WHICH COMPRISES COPOLYMERIZING (A) A VINYL MONOMER, AND (B) AN OLEFINICALLY UNSATURATED POLYESTER CONTAINING TRIVALENT PHOSPHORUS INCORPORATED INTO THE MOLECULE BY ESTER LINKAGES AND OBTAINED BY HEATING, AT A TEMPERATURE BETWEEN ABOUT 90*C. AND ABOUT 200*C., A PHOSPHOROUS ACID ALKYL ESTER HAVING AT LEAST TWO ALKYL GROUPS OF FROM ONE TO FOUR CARBON ATOMS, A SATURATED POLYHYDRIC ALCOHOL, AND AN ESTER OF A MONOHYDRIC ALCOHOL AND, AN A,B-UNSATURATED POLYCARBOXYLIC ACID, SAID PHOSPHOROUS ACID ALKYL ESTER BEING PRESENT IN THE REACTION MIXTURE IN AN AMOUNT UP TO 90 MOL PERCENT OF THE HYDROXY GROUPS OF SAID POLYHYDRIC ALCOHOL SUCH THAT THE POLYESTER PRODUCT FORMED CONTAINS AT LEAST 1.5 PERCENT BY WEIGHT OF PHOSPHORUS.