Methods of making oligomers, coating compositions containing them, and coated articles
An oligomer is made by capping a uretdione compound of structure with a compound (II) having an active hydrogen and a carbamate or cyclic carbonate group under conditions in which the isocyanate groups but not the uretdione group react. The product (III) is either reacted with a reactant having at l...
Saved in:
Main Authors | , , |
---|---|
Format | Patent |
Language | English |
Published |
14.01.2014
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | An oligomer is made by capping a uretdione compound of structure with a compound (II) having an active hydrogen and a carbamate or cyclic carbonate group under conditions in which the isocyanate groups but not the uretdione group react. The product (III) is either reacted with a reactant having at least two active hydrogens under reaction conditions that cleave the uretdione ring, after which any cyclic carbonate groups may be converted to carbamate groups, or a product (III) having cyclic carbonate groups is reacted with ammonia or primary amine to provide uretdione with a hydroxy carbamate group that is then self-condensed under uretdione ring-opening conditions. A curable coating composition comprises the oligomer; a coated article is prepared by applying a layer of the curable coating composition and curing the applied layer. |
---|---|
Bibliography: | Application Number: US20090469261 |