Tosoh Finechem Corporation

Tosoh Corporation

Yusuke Shigeta

Shinji Ozoe

Makoto Watanabe

Norihisa Kondo

Shohei Yumino

Tomoya Shimono

Hideki Miyauchi

Daisuke Inoue

Shota Nishida

Shinichi Yusa

Akihiro Fuji

Kanta Sharker Komol

Yuki Ohara

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.

Polystyrene-based polyampholyte having upper critical solution temperature, and application for same

A method of stabilizing perfluoro(2-methylene-4-methyl-1,3-dioxolane) (hereinafter simply referred to as a 'stabilization method'), including incorporating at least one selected from the group consisting of a hydroxy group-containing fluoroaromatic compound represented by General Formula (1) below and a hydroxy group-containing fluoroaromatic compound represented by General Formula (2) below into a composition containing perfluoro(2-methylene-4-methyl-1,3-dioxolane): (in the formula, Rto Reach independently represent one selected from the group consisting of a fluorine atom, a perfluoroalkyl group and a hydroxy group, and at least one of Rto Ris a hydroxy group); (in the formula, Rto Reach independently represent one selected from the group consisting of a fluorine atom, a perfluoroalkyl group and a hydroxy group, and at least one of Rto Ris a hydroxy group).

Method of stabilizing perfluoro(2-methylene-4-methyl-1,3-dioxolane) and composition containing stabilized perfluoro(2-methylene-4-methyl-1,3-dioxolane)

The present invention provides a high-purity arylsulfonic acid amine salt vinyl monomer which is an extremely industrially useful arylsulfonic acid monomer with excellent storage stability and amphiphilic solubility in both water and organic solvents, a simple and practical method for producing the same, a polyarylsulfonic acid amine salt which is a polymer thereof, and a method for producing the same. In the arylsulfonic acid amine salt vinyl monomer, a tertiary amine having 2 or 3 different substituents that each have 1 to 7 carbon atoms and also containing at least one or more of tertiary carbon or quaternary carbon or cyclic skeleton in the structure is applied to an amine moiety thereof, and in addition, a polyarylsulfonic acid amine salt having high purity in terms of sulfonation rate and polymerization conversion rate and a polymer thereof are used.

High-purity amphipathic arylsulfonic acid amine salt vinyl monomer and copolymer thereof

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Shunan, Japan

Yusuke Shigeta