| 摘要 |
A curable composition comprising (A) constituents containing carbamate groups I: -O-C(O)-NHR (I) in which R=a hydrogen atom or an alkyl, cycloalkyl or aryl group, (B) constituents containing carbamate-reactive groups, the equivalents ratio of carbamate-reactive groups in (B) to carbamate groups in (A) being >0.2, (C) adducts preparable from (c1) polyisocyanates and (c2) compounds II containing isocyanate-reactive functional groups: in which R<1 >and R<2>: independently of one another are hydrogen atoms or alkyl radicals; X and Y: oxygen atom, sulfur atom or a radical >N-R<6>, in which R<6>=aliphatic radical; R<3>: is an alkylene radical; R<4 >and R<5>: are hydrogen atoms, isocyanate-reactive functional groups or R<6>; with the proviso that one group R<4>, R<5 >or R<6 >contains an isocyanate-reactive functional group or R<4 >or R<5 >is an isocyanate-reactive functional group and the other radicals R<4>, R<5 >or R<6>-where present-contain no isocyanate-reactive groups; the molar ratio of (c1) to (c2) being chosen such that the adducts (C) contain in the molecule isocyanate groups; process for its preparation, and its use.
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