| 摘要 |
Uretdione-functional polyaddition compounds of the formula: <IMAGE> (UD-DA) <IMAGE> <IMAGE> <IMAGE> Y and Y' are O, NH, or NR5; n is 1-20; R is <IMAGE> R1 is a divalent hydrocarbon radical of 2-16 carbon atoms; R2 is H, identical or different hydrocarbon radicals of 1-14 carbon atoms; R3, R4 and R5 are identical or different hydrocarbon radicals of 1-14 carbon atoms, by reacting IPDI uretdione with at least one reactant selected from the group consisting of diols, amino alcohols and diamines in a solution (L1) thereby forming the product (UD-DA) polyaddition compound, and adding the solution (L1) to a second solvent (L2) in which the uretdione polyaddition compound is insoluble, thereby precipitating said polyaddition compound (UD-DA).
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