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:
Feb. 17, 2026
Filed:
Oct. 15, 2019
Coatex, Genay, FR;
COATEX, Genay, FR;
Abstract
Associative thickeners, and more particularly to associative thickeners of the HEUR type, may be used in aqueous formulations. In particular, a method for continuous preparation of HEUR-type associative thickeners may include reactive extrusion. These products are suitable to be used in aqueous formulations. Such a method may include: continuously preparing a hydrophilic polymer (P) by a reactive extrusion of precursors including a water-soluble polyalkylene glycol (A) and a product (B); and mixing the hydrophilic polymer (P) in a medium including a solvent. The water-soluble polyalkylene glycol (A) may include a polyethylene glycol, a polyethylene glycol-polypropylene glycol copolymer with at most 40% by weight of polypropylene glycol, and/or a polyethylene glycol-polybutylene glycol copolymer comprising at most 20% by weight of polybutylene glycol. The product (B) may include an associative group and an isocyanate group.