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. 29, 2025
Filed:
Nov. 12, 2020
Dow Toray Co., Ltd., Tokyo, JP;
DOW TORAY CO., LTD., Tokyo, JP;
Abstract
A manufacturing method for a polyether polysiloxane block copolymer composition that can avoid the use and incorporation of aromatic hydrocarbon-based solvents is provided. The manufacturing method is generally easy on an industrial production scale. The manufacturing method includes a step of obtaining a polyether polysiloxane block copolymer (A) by a specific reaction in the presence of a saturated hydrocarbon solvent (C) having an average number of carbon atoms in a range of 6 to 11, and a step of replacing the solvent (C) used in the reaction with (B) a (poly)glycol or a polyglycol derivative diluent, either during or after the aforementioned step. Also provided is a method of manufacturing a foam stabilizer or the like using the composition obtained by the aforementioned manufacturing method.