Unsaturated polyester reaction products, copolymers thereof, and process of producing same

Claim 1

AS A PRODUCT OF MANUFACTURE, AN UNSATURATED POLYESTER HAVILNG AN AVERAGE OF MORE THAN TWO CENTERS OF OLEFINIC UNSATURATION REACTIVITY CAPABLE OF FREE-RADICAL COPOLYMERIZATION PER MOLECULE FORMED BY HEATING TO A TEMPERATURE BETWEEN ABOUT 100*C. AND ABOUT 150*C. AND IN THE PRESENCE OF AN ACID CONDENSATION CATALYST SELECTED FROM THE GROUP CONSISTILNG OF SULVURIC ACID, ORTHOPHOSPHORIC ACID, P-TOLUENE-SULFONIC ACID AND ZINC CHLORIDE, A MIXTURE CONSISTING ESSENTIALLY OF A CYCLIC COMPOUND SELECTED FROM THE GROUP CONSISTILNG OF XYLENE, TOLUENE, ANISOLE, O-DICHLOROBENZENE, TETRALIN, ETHYL-BENZENE, CYCLOHEXANONE, DIPHENYL, DIPHENYL OXIDE AND ACETOPHENONE, AN OLEFINC CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ACID ANHYDRIDE, FUMARIC ACID, ACONITIC ACID, CROTONIC ACID AND ITACONIC ACID, AND AND ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND PARAFORMALDEHYDE, AND DISTILLING THE RESIDUAL POLYESTER SOLUTION AT A TEMPERATURE BELOW 200*C. TO REMOVE THE SOLVENT AND UNREACTED VOLATILE STARTING MATERIALS AND TO PRESERVE THE OLEFINIC UNSATURATION IN SAID POLYESTER.