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AssigneeBayer Aktiengesellschaft
InventorsE. Haakan Jonsson, Douglas A. Wicks, Philip E. Yeske, Lyuba K. Gindin
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The present invention relates to hydroxy-functional polyhydantoin prepolymers 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, R.sub.2 represents an organic group which is 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.
A hydroxy-functional hydantoin prepolymer corresponding to the formula ##STR5## 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, wherein said NCO prepolymer is prepared by reacting a polyisocyanate with a polyaspartate at a minimum equivalent ratio of isocyanate groups to aspartate groups of 2.1:1,
A hydroxy-functional hydantoin prepolymer corresponding to the formula ##STR6## wherein R represents the residue obtained by removing the isocyanate groups from an organic monomeric diisocyanate or a polyisocyanate adduct,
Dependencies are inferred from the claim text.