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:
Jan. 06, 2026
Filed:
Sep. 20, 2021
Polystyrene-based polyampholyte having upper critical solution temperature, and application for same
Tosoh Finechem Corporation, Shunan, JP;
Shinichi Yusa, Himeji, JP;
Kanta Sharker Komol, Himeji, JP;
Yuki Ohara, Himeji, JP;
Yusuke Shigeta, Shunan, JP;
Shinji Ozoe, Shunan, JP;
TOSOH FINECHEM Corporation, Shunan, JP;
Abstract
Provided is a novel polystyrene-based polyampholyte having upper critical solution temperature (UCST)-type thermoresponsiveness and a method for producing the same. When monomers having halogenated vinylbenzyl trialkyl ammonium and p-styrenesulfonate as main components are radically polymerized in an aqueous solvent, a polyampholyte having an upper critical solution temperature is produced by optimizing the mole ratio between cationic groups and anionic groups and the amount of a radical initiator and a chain transfer agent to be added to thereby control the copolymer composition and the molecular weight.