Flame retardant resins prepared from unsaturated polyesters and dicyclopentadiene

Claim 1

A FIRE-RETARDANT POLYESTER RESIN (II) HAVING AN ACID VALUE OF NOT MORE THAN 70 AND COMPRISING THE ADDITION PRODUCT OF DICYCLOPENTADIENE TO THE FREE CARBOXYL AND HYDROXYL GROUPS OF POLYESTER RESIN (I) IN AN AMOUNT OF FROM 0.05 TO 0.6 MOL OF DICYCLOPENTADIENE PER MOL OF DICARBOXYLIC ACID COMPONENT IN SAID POLYESTER RESIN (I), SAID POLYESTER RESIN (I) HAVING AN ACID VALUE OF NOT MORE THAN 150 AND BEING OBTAINED BY REACTING A MIXTURE (III) OF (A) 0.4 TO 0.8 MOL OF AT LEAST ONE REACTANT SELECTED FROM THE GROUP CONSISTING OF (A1) DICARBOXYLIC ACIDS, (A2) ANHYDRIDES OF (A1), (A3) MIXTURES OF ANY ONE OF (A1) AND (A2) WITH MONOBASIC CARBOXYLIC ACIDS, (A4) MIXTURE OF ANY ONE OF (A1) WITH AT LEAST TRIBASIC CARBOXYLIC ACIDS, AND (A5) MIXTURES ANY ONE OF (A1) TO (A4) WITH CHLORINE-CONTAINING GROUPS OF COMPONENT (A) BEING DERIVED FROM DICARBOXYLIC ACIDS, (B) 0.05 TO 0.4 MOL OF AT LEAST ONE BROMINE-CONTINING CARBOXYLIC ACID, (C) 0.01 TO 0.2 MOL OF AT LEAST ONE CONDENSABLE PHOSPHORUS-CONTAINING COMPOUND AND (D) AT LEAST ONE REACTANT SELECTED FROM THE GROUP CONSISTING OF (D1) DIHYDRIC ALCOHOLS, (D2) MIXTURES OF (D1) WITH MONOHYDRIC ALCOHOLS, (D3) MIXTURES OF ANY ONE OF (D1) AND (D2) WITH AT LESST TRIHYDRIC ALCOHOLS, AND (D4) MIXTURES OF ANY ONE OF (D1) TO (D3) WITH HALOGENATED ALCOHOLS, AT LEAST 75% OF THE HYDROXY GROUPS OF COMPONENT (D) BEING DERIVED FROM DIHYDRIC ALCOHOLS. IN WHICH MIXTURE (III) AT LEAST 20% OF THE TOTAL AMOUNT OF EQUIVALENTS OF THE CARBOXYLIC ACID COMPONENT AND THE HYDROXY COMPONENT CONTAIN A COPOLYMERISABLE OLEFINIC BOND AND THE HYDROXY COMPONENT (D) IS PRESENT IN AN AMOUNT RANGING FROM 50 EQUIVALENT PERCENT HIGHER TO 50 EQUIVALENT PERCENT LOWER THAN THE EQUIVALENT AMOUNT OF ACID GROUPS OF COMPONENTS (A), (B) AND (C), SAID POLYESTER RESIN (II) CONTAINING BROMINE AND PHOSPHORUS IN AN AMOUNT TOGETHER EQUALING AT LEAST 2% BY WEIGHT.