The present invention relates to hydroxy-functional prepolymers containing urea groups and corresponding to the formula ##STR1## wherein R represents the residue obtained by removing the isocyanate groups from an organic monomeric diisocyanate, a polyisocyanate adduct or an NCO prepolymer containing hydantoin groups or hydantoin group precursors, R.sub.1 and R.sub.2 may be identical or different and represent organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less, R.sub.3 and R.sub.4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less, R.sub.5 represents the hydrocarbon radical obtained by removing the amino and hydroxyl groups from an amino alcohol, n has a value of 1 to 3 and m has a value of 2 to 6. The present invention is also directed to compositions suitable for the production of coatings, adhesives or elastomers containing these polyhydantoin prepolymers in combination with optionally blocked polyisocyanates or aminoplast resins.
本发明涉及含有
尿素基团的羟基功能预聚合物,其符合以下式:其中R代表从有机单体二
异氰酸酯、多异
氰酸盐加成物或含有海因酮基团或海因酮基团前体的NCO预聚合物中去除异
氰酸基团后得到的残基,R.sub.1和R.sub.2可以相同也可以不同,代表在100摄氏度或更低温度下对异
氰酸基团惰性的有机基团,R.sub.3和R.sub.4可以相同也可以不同,代表氢或在100摄氏度或更低温度下对异
氰酸基团惰性的有机基团,R.sub.5代表从
氨基醇中去除
氨基和羟基得到的碳氢基团,n的值为1至3,m的值为2至6。本发明还涉及适用于生产含有这些多海因酮预聚合物的涂料、粘合剂或弹性体的组合物,其与可选择的阻化多
异氰酸酯或
氨基
酚醛
树脂结合使用。