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US 12,686,739 B2Granted
Epoxy-amine adduct
AssigneeEvonik Operations GmbH
InventorQiubai Peng
Life of this patent
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Abstract
Disclosed herein is an epoxy-amine adduct comprising a reaction product of a heterocyclic amine comprising a reaction product of a polyethylene polyamine having 3 to 10 nitrogen atoms and an aldehyde having 1 to 8 carbon atoms; and at least one epoxide having one or more epoxy groups, wherein the heterocyclic amine has at least two nitrogen atoms in at least one ring, and the epoxide is essentially free of polyether modification. A curing agent comprising the epoxy-amine adduct and a method for preparing the epoxy-amine adduct are provided.
Claims16
An epoxy-amine adduct comprising a reaction product of:
- a) a heterocyclic amine comprising a reaction product of a polyethylene polyamine having 3 to 10 nitrogen atoms and an aldehyde having 1 to 8 carbon atoms;
- and
- b) at least one epoxide having one or more epoxy groups, wherein the heterocyclic amine has at least two nitrogen atoms in at least one ring, and the epoxide has no alkoxylate repeating units, and wherein the stoichiometric ratio as the ratio of the equivalent number of active amine hydrogens of the heterocyclic polyamine to the equivalent number of epoxy groups of the epoxides is in the range of 3 to 100.
Dependencies are inferred from the claim text.