Extended pot-life for low temperature curing polyuretdione resins
AssigneeCovestro LLC
InventorsAlan Ekin, David P. Zielinski
Life of this patent
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Abstract
The present invention provides a reaction mixture comprising a polyuretdione resin, a neutralized polyol, an acid-blocked tertiary amine catalyst, and optionally, an additive package selected from the group consisting of flow control additives, and wetting agents, and solvents, wherein the acid has a pKa of greater than 4.82. Compositions made from the reaction mixture of the present invention may be catalyzed at temperatures from room temperature to 130° C. and are particularly applicable in or as coatings, adhesives, castings, composites, and sealants with good performance and extended pot-life.
Claims29
A reaction mixture comprising:
- a polyuretdione resin;
- a neutralized polyol;
- and
- an acid-blocked tertiary amine catalyst;
- and
- optionally,
- an additive package selected from the group consisting of flow control additives, wetting agents, and solvents,
- wherein the acid has a pKa of greater than 4.82.
A method of making a composition comprising:
- reacting a polyuretdione resin and a neutralized polyol, and optionally an additive package selected from the group consisting of flow control additives, wetting agents, and solvents, in the presence of an acid-blocked tertiary amine catalyst, wherein the acid has a pKa of greater than 4.82.
Dependencies are inferred from the claim text.