Polyurethane polyester-polyol compositions modified with an alkylenimine

Claim 1

A COATING COMPOSITION COMPRISING THE REACTION PRODUCT OF: A. AN UNGELLED, CARBOXYL-HYDROXYL-CONTAINING URETHANE REACTION PRODUCT HAVING AN ACID VALUE OF AT LEAST ABOUT 1 AND HAVING AN INTRINSIC VISCOSITY OF 1.0 DECILITERS PER GRAM OR LESS, AND B. AN AKYLENIMINE, WHEREIN SAID ALKYLENIMINE HAS 2 OR 3 CARBON ATOMS PER ALKYLENIMINE RING, WHERBY AT LAST ABOUT 0.03 PERCENT BY WEIGHT OF ACIDIC GROUPS BASED ON TOTAL WEIGHT OF THE URETHANE REACTION PRODUCT ARE REACTED WITH THE ALKYLENIMINE.

Claim 8

The method of producing a coating composition of improved pigment wetting properties comprising: A. forming an ungelled, hydroxyl-containing urethane reaction product having an intrinsic viscosity of 1.0 deciliter per gram or less; B. reacting the urethane reaction product with an acidic carboxyl source material, with said source material being present in an amount sufficient to yield a carboxyl-hydroxyl-containing urethane reaction product containing at least 0.075 percent by weight of acidic carboxyl groups; and C. reacting the thus-formed carboxyl-hydroxyl-containing urethane reaction product with an alkylenimine, said alkylenimine having 2 or 3 carbon atoms per alkylenimine ring; whereby at least about 0.03 percent by weight of acidic groups, based on total weight of the carboxyl-hydroxyl-containing urethane reaction product are reacted with the imine.

Claim 9

The method of producing a coating composition of improved pigment wetting properties comprising: A. forming an ungelled, hydroxyl-containing urethane reaction product having an intrinsic viscosity of 1.0 deciliter per gram or less; B. reacting the urethane reaction product with an acidic carboxyl source material, with said source material being present in an amount sufficient to yield a carboxyl-hydroxyl-containing urethane reaction product containing at least 0.075 percent by weight of acidic carboxyl groups; and C. reacting the thus-formed carboxyl-hydroxyl-containing urethane reaction product with an alkylenimine, said alkylenimine having 2 or 3 carbon atoms per alkylenimine ring; whereby at least about 0.03 percent by weight of acidic groups, based on total weight of the carboxyl-hydroxyl-containing urethane reaction product are reacted with the imine.

Claim 14

The method of producing a coating composition oof improved pigment-wetting properties comprising: A. reacting an organic polyisocyanate with a polyhydric material, wherein the major portion of said polyhydric material is selected from the group consisting of polyether polyols, polyester polyols, and mixtures thereof, and wherein said polyhydric material contains no more than about 1 grammole of compounds having a functionality of 3 or more per 500 grams of polyhydric material; B. reacting an acidic carboxyl source material with the polyisocyanate and the polyhydric material with said source material being present in an amount sufficient to produce an acidic carboxyl group content of at least 0.075 percent by weight; C. terminating the reaction when the intrinsic viscosity is 1.0 deciliter per gram or less; and D. reacting the thus-formed carboxyl-hydroxyl-containing urethane reaction product with an alkylenimine said alkylenimine having 2 or 3 carbon atoms per alkylenimine ring; whereby at least 0.3 percent by weight of the acidic group based on total weight of the carboxyl-hydroxyl-containing reaction product reacted with the alkylenimine.

Claim 15

The method of producing a coating composition oof improved pigment-wetting properties comprising: A. reacting an organic polyisocyanate with a polyhydric material, wherein the major portion of said polyhydric material is selected from the group consisting of polyether polyols, polyester polyols, and mixtures thereof, and wherein said polyhydric material contains no more than about 1 grammole of compounds having a functionality of 3 or more per 500 grams of polyhydric material; B. reacting an acidic carboxyl source material with the polyisocyanate and the polyhydric material with said source material being present in an amount sufficient to produce an acidic carboxyl group content of at least 0.075 percent by weight; C. terminating the reaction when the intrinsic viscosity is 1.0 deciliter per gram or less; and D. reacting the thus-formed carboxyl-hydroxyl-containing urethane reaction product with an alkylenimine said alkylenimine having 2 or 3 carbon atoms per alkylenimine ring; whereby at least 0.3 percent by weight of the acidic group based on total weight of the carboxyl-hydroxyl-containing reaction product reacted with the alkylenimine.