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US 5,633,389 AGranted
Thermoreversible coating and a process for its manufacture
AssigneeBayer Aktiengesellschaft
InventorsErik H. Jonsson, Philip E. Yeske, Douglas A. Wicks, Harald Pielartzik
Life of this patent
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Abstract
The invention relates to a thermoreversible process for the preparation of a hydantoin comprisng (a) reacting an unsaturated polyester with a monofunctional amine to yield a poly(ester aspartate), and (b) reacting said poly(ester aspartate) with an isocyanate to produce a poly(ester urea), and (c) heating said poly(ester urea) to form a hydantoin compound. The process is useful for the preparation of coatings.
Claims10
A thermoreversible process for the preparation of a hydantoin comprising
- (a) reacting an unsaturated polyester with a monofunctional amine to yield a poly(ester aspartate), and
- (b) reacting said poly(ester aspartate) with an isocyanate to produce a poly(ester urea), and
- (c) heating said poly(ester urea) to form a hydantoin compound,
- wherein said unsaturated polyester is the product of a reaction of a compound containing a structural unit conforming to ##STR6## and at least one diol.
1 more element
A thermoreversible coating comprising poly(ester urea) prepared by
- (a) reacting an unsaturated polyester with a monofunctional amine to yield a poly(ester aspartate), and
- (b) reacting said poly(ester aspartate) with an isocyanate to produce a poly(ester urea),
- wherein said unsaturated polyester is the product of a reaction of a compound containing a structural unit conforming to ##STR7## and at least one diol.
Dependencies are inferred from the claim text.