Amine-borane adduct curing agents for epoxy/anhydride resins
AssigneeE. I. Du Pont de Nemours and Company
InventorAnthony J. Arduengo
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Abstract
An improved curing agent for use in coatings, laminates, moldings, castings and adhesives comprising the use of an amine-borane adduct along with a mixture of an anhydride polymer or copolymer having at least two anhydride groups and an epoxy polymer or copolymer having at least two epoxy groups. Also provided is an improved process for the preparation of tertiary amine borane curing agents.
Claims16
In a coating composition for finishing substrates wherein are mixed an anhydride polymer or copolymer having at least two anhydride groups, an epoxy polymer or copolymer having at least two epoxy groups and a curing agent, an improvement comprising the use of amine-borane adducts as the curing agent, and the coating composition is cured, without heating, at room temperature such that a primary reaction between the anhydride groups and epoxy groups occurs.
A coating composition comprising 20% to 80% of an anhydride a polymer or copolymer with a weight average molecular weight of less than or equal to 100,000, having at least two anhydride groups, 80% to 20% of an epoxy polymer or copolymer with a weight average molecular weight of equal to or less than 100,000 containing at least two epoxy groups and 1% to 6% by weight of a tertiary organic amine-borane adduct as a catalyst, wherein the composition is cured, without heating, at room temperature and a primary reaction occurs between the anhydride groups of the anhydride polymer or copolymer and the epoxy groups of the epoxy polymer or copolymer.
Dependencies are inferred from the claim text.