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:
May. 27, 2025
Filed:
Oct. 13, 2020
Akzo Nobel Coatings International B.v., Amsterdam, NL;
Zheng Shi, Shanghai, CN;
Quan James Huang, Zhejiang, CN;
Puxin Fang, Zhejiang, CN;
Hong Lin, Guangdong, CN;
Junbiao Lu, Shanghai, CN;
Akzo Nobel Coatings International B.V., Amsterdam, NL;
Abstract
The invention relates to the synthesis of a carboxyl-functional, unsaturated polyurethane containing a perfluoropolyether block, which can be used as an easy clean additive in preparation of a waterborne, UV curable coating composition. The polyurethane can be prepared by a method comprising the following steps: a) subjecting a hydroxy-terminated perfluoropolyether A to a reaction with a molar excess of polyisocyanate B to obtain an isocyanate-functional urethane C, b) adding a carboxyl-functional polyol D to the reaction mixture, c) adding OH— functional (meth)acrylate monomer E to the reaction mixture, wherein steps (b) and (c) can be performed in any order, and d) neutralizing the reaction product with a neutralizer F. The resulting coating has easy clean and anti-stain properties.