Urethane coatings from hydroxyl terminated polyesters prepared from dimer acids

Claim 1

A PACKAGE MADE OF SEPARATE COMPONENTS, A AND B, WHICH ON BEING MIXED TOGETHER CURE TO FORM A PROTECTIVE COATING WHEN CAST IN A FILM-FORM ON A SUBSTRATE, SAID COMPONENT A BEING AN ORGANIC SOLUTION OF A POLYFUNCTIONAL COMPOUND CONTAINING A PLURALITY OF AVAILABLE ISOCYANATE GROUPS, AND COMPONENT B BEING A HYDROXYL-TERMINATED POLYESTER FORMED FROM A POLYOL AND A MIXTURE OF CARBOXYLIC ACIDS AMDE OF 10 TO 70 MOL PERCENT DIMER ACIDS, FROM 20 TO 80 MOL PERCENT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, PHTHALIC ACID, ISOPHTHALIC ACID, FUMARIC ACID, SUCCINIC ACID, MALEIC ANHYDRIDE, PHTHALIC ANHYDRIDE, SUCCINIC ANHYDRIDE, AND MIXTURES OF SAID ACIDS AND SAID ANHYDRIDES, AND FROM 10 TO 70 MOL PERCENT OF AN ALIPHATIC, MONOBASIC ACID CONTAINING FROM 9 TO 22 CARBON ATOMS, SAID POLYESTER HAVING A HYDROXYL FUNCTIONALITY OF AT LEAST 2, AN ACID VALUE BELOW ABOUT 5, A HYDROXYL VALUE OF AT LEAST 50, AND AMOLECULAR WEIGHT OF FROM ABOUT 300 TO 3000.