Hydroxy-functional polyhydantoin prepolymers and their use in coating compositions

摘要

The present invention relates to hydroxy-functional polyhydantoin prepolymers corresponding to the formula <CHEM> 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, R2 represents an organic group which is inert towards isocyanate groups at a temperature of 100 DEG C or less, R3 and R4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100 DEG C or less, R5 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.