A simplified process for preparing uretdione-functional polyaddition compounds

Abstract From the Canadian patent

Disclosed is a process for preparing a uretdione-functional polyaddition compound from isophorone diisocyanate uretdione and at least one active hydrogen-containing compound selected from a diol, an amino alcohol and a diamine of the following formula:, (see fig. I), in which X is, - N=C=O or (see fig. II);, B is, (see fig. III) OR4 , or (see fig. IV);, Y and Y1 are each O NH or NR5;, n is a number of 1 to 20;, R is (see fig. V) ;, R1 is a divalent hydrocarbon radical of 2-16 carbon atoms;, R2 is H, or a hydrocarbon radical of 1-14 carbon atoms; and, R3, R4, and R5 are each a hydrocarbon radical of 1-14 carbon atoms, by first preparing the uretdione-functional polyaddition compounds (UD-DA) …