The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
Jul. 10, 2020
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventor:
Qiubai Peng, Shanghai, CN;
Assignee:
Evonik Operations GmbH, Essen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G 59/18 (2006.01); C09D 163/00 (2006.01);
U.S. Cl.
CPC ...
C08G 59/184 (2013.01);
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.