Fully curable unsaturated polyesters treated with allyl alcohol

Claim 1

PROCESS FOR PREVENTING THE POLYMERIZATION-INHIBITING EFFECT OF AIR ON UNSATURATED POLYESTERS WHICH COMPRISES FORMING A MIXTURE OF ALLYL ALCOHOL AND PREFORMED UNSATURATED POLYESTER OF A DIHYDRIC ALCOHOL AND OF A CARBOXYLIC ACID ESTERIFYING MATERIAL AT LEAST 50 MOL PERCENT OF WHICH IS AN ETHYLENICALLY UNSATURATED ACID-REACTING COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALPHA UNSATURATED ALPHA,BETA POLYCARBOXYLIC ACIDS AND THEIR ANHYDRIDES, SAID DIHYDRIC ALCOHOL BEING USED IN A STOICHIOMETRIC EXCESS OF UP TO 5 MOL PER CENT OVER COMBINED ACID MATERIAL, THE ALLYL ALCOHOL BEING EMPLOYED IN AN AMOUNT RANGING FROM 0.25 MOL TO 1.2 MOLS PER MOL OF ETHYLENICALLY UNSATURATED COMPOUND, HEATING THE MIXTURE AT REFLUX TEMPERATURES TO EFFECT ADDITION OF SAID ALLYL ALCOHOL TO THE ETHYLENIC BOND OF SAID ETHYLENICALLY UNSATURATED ACID-REACTING COMPOUND, AND ADMIXING WITH THE ALLY ALCOHOL-MODIFIED UNSATURATED POLYESTER A MONOMER CONTAINING THE POLYMERIZABLE GROUP CH2=C< COPOLYMERIZABLE WITH THE RESIN TO A HARD, INFUSIBLE STATE.