abstract |
The object of the invention are compounds of the formula (2) wherein R1 is H, methyl or ethyl, R2 C1- to C4 alkyl, A is a C2- to C4 alkylene group, m is a number from 1 to 400 n 1, 2, 3, 4, or 5, a method for their production and their use in the production of polyurethane prepolymers. |