| abstract |
POLYESTER RESINS CONTAINING URTHANE LINKAGES, COMPRISING: (A) THE REACTION PRODUCT OF (1) A POLYESTER PREPARED FROM AT LEAST ONE POLYCARBOXYLIC ACID AND AT LEAST ONE POLYHYDRIC ALCOHOL SUBSTANTIALLY FREE OF UNSATURATED REACTANTS AND NATURALLY OCCURRING OILS, AND (2) AN ORGANIC POLYISOCYANATE; THE RATION OF (1) AND (2) BEING SUCH THAT EQUIVALENTS OF HYDROXYL/EQUIVALENTS OF (CARBOXYL+ISOCYANATE) IS GREATER THAN 1 AND UP TO 0.5 TO 2.0 AND THE RATIO OF EQUIVALENTS OF CARBOXYL/ EQUIVALENTS OF ISOCYANATE IS GREATER THAN 1 AND UP TO ABOUT 30; OR (B) THE REACTION PRODUCT OF (1) A POLYESTER PREPARED FROM AT LEAST ONE ALPHA, BETA-ETHYLENICALLY UNSATURATED POLYCARBOXYLIC ACID AND AT LEAST ONE POLYHYDRIC ALCOHOL, AND (2) ORGANIC POLYISOCYANATE; THE RATIO OF (1) TO (2) BEING SUCH THAT THE RATIO OF EQUIVALENTS OF HYDROXYL/EQUIVALENTS OF (CARBOXYL+ISOCYANATE) IS 0.5 TO 2.0 AND THE RATIO OF EQUIVALENTS OF CARBOXYL/ EQUIVALENTS OF ISOCYANATE IS GREATER THAN 1 AND UP TO ABOUT 30. FILM FORMING COMPOSITIONS MADE BY BLENDING THE SATURATED RESIN (A), WHICH MAY BE WATER DISPERSIBLE, WITH 5% TO 50% OF AN AMINOPLAST RESIN IN WATER OR ORGANIC SOLVENT, OR WITH A FREE ISOCYANATE CONTAINING PREPOLYMER OR ADDUCT, OR BY BLENDING THE UNSATURATED RESIN (B) WITH AN ETHYLENICALLY UNSATURATED MONOMER AND EFFECTING ADDITION POLYMERIZATION. |