Patent ID: 6911501

Claim:
An aspartate of the formula: where x represents an m-valent organic residue obtained by removing the primary amino group or groups from a di- or polyamine containing primary amino groups and having a number average molecular weight of 60 to 6000, and which may contain further functional groups that either are reactive with isocyanate groups or are inert to isocyanate groups at temperatures of up to 100° C., R 3 and R 4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100° C. or less, R 1 and R 2 may be identical or different and represent organic groups which are inert towards isocyanate groups at a temperature of 100° C. or less, R 5 and R 6 may be the same or different and represent moieties selected from the group consisting of i) hydrogen, ii) straight or branched C 1 to C 8 alkyl groups, which may be substituted with up to three aryl groups containing from 6 to 10 carbon atoms, iii) C 6 to C 10 aryl groups, which may be substituted with up to three alkyl groups having from 1 to 3 carbon atoms, and iv) together form a six-membered cycloalkyl group, with said cycloalkyl group being substituted with from 0 to 3 alkyl groups having from 1 to 3 carbon atoms, R 7 represents a moiety selected from the group consisting of i) hydrogen, ii) straight or branched C 1 to C 8 alkyl groups, which may be substituted with up to three aryl groups containing from 6 to 10 carbon atoms, and iii) C 6 to C 10 aryl groups, which may be substituted with up to three alkyl groups having from 1 to 3 carbon atoms, a and b represent integers of from 1 to 5, provided that the sum of a and b is from 2 to 6.