申请人:Bayer MaterialScience LLC
公开号:EP1650245A1
公开(公告)日:2006-04-26
The present invention is directed to blocked biuret group-containing polyisocyanate compositions, wherein the blocking agent is selected from the group consisting of a blocking agent of the formula:
wherein R1, R2, R3 may be identical or different and represent a moiety selected from the group consisting of hydrogen, C1-C4-alkyl and C3-C6-cycloalkyl, R4 represents a moiety selected from the group consisting of C1-C4-alkyl, C6-C10-cycloalkyl or C7-C14-aralkyl, and x represents a number of from 1 to 5 , and
a blocking agent of the formula:
wherein R1, R2, R3 and R4 may be the same or different and represent a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl, R5 represents a moiety selected from the group consisting of C1-C10-alkyl and C3-C10-cycloalkyl, and B is a group according to one of the following structural formulas
wherein each occurrence of R6, R7, and R8 may be the same or different and represent a moiety selected from the group consisting of C1-C6-alkyl and C3-C6-cycloalkyl and R9 is a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl.
本发明涉及封端含双脲基团的聚异氰酸酯组合物,其中封端剂选自由式如下的封端剂组成的组:
其中 R1、R2、R3 可以相同或不同,并代表选自氢、C1-C4-烷基和 C3-C6-Cycloalkyl 组成的组的分子,R4 代表选自 C1-C4-烷基、C6-C10-cycloalkyl 或 C7-C14-aralkyl 组成的组的分子,x 代表 1 至 5 的数字,以及
式中的封端剂:
其中 R1、R2、R3 和 R4 可以相同或不同,并代表选自氢、C1-C6-烷基和 C3-C6-Cycloalkyl 组成的组的分子,R5 代表选自 C1-C10- 烷基和 C3-C10-Cycloalkyl 组成的组的分子,B 是符合以下结构式之一的基团
其中 R6、R7 和 R8 的每次出现可以相同或不同,并代表选自由 C1-C6 烷基和 C3-C6 环烷基组成的组的分子,R9 是选自由氢、C1-C6-烷基和 C3-C6 环烷基组成的组的分子。