Unimatec Co., Ltd

Nippon Mektron Limited

Sunao Ikeda

Akira Endo

Satoru Saito

Katsuyuki Sato

Keisuke Kokin

Takehiro Sonoi

Yusuke Takahashi

Kimihiko Urata

Hiroaki Murata

Takuhiro Miyamura

Yuta Ogawa

Keisuke Kokinn

Provided are a fluorine-containing monomer soluble in a hydrocarbon-based solvent as well as excellent in water and oil repellence, and a manufacturing method therefor. The fluorine-containing monomer is a carboxylic acid ester/carbamate compound having a polymerizable functional group and a fluorine atom group, and represented by the following general formula: CFO&#x2014;(CFO)&#x2014;CFCOO&#x2014;Z&#x2014;(CONHR). The method for manufacturing the carboxylic acid ester/carbamate compound is comprised of the steps of making an isocyanate compound having a polymerizable functional group react with an alcohol such as a polyalkylene glycol, a cycloalkane dimethanol, or a polyhydric alcohol to produce a hydroxycarbamate, and subsequently making the resulting hydroxycarbamate react with a perfluoropolyether carboxylic acid halide.

Carboxylic acid ester/carbamate compound with polymerizable functional group and fluorine atom group, and manufacturing method therefor

Hexafluoroacetone or a hydrate thereof is produced with a high yield by subjecting a 1-fluoro-4,4-bis(trifluoromethyl)-2,3,5-trioxolanyl ether compound represented by the general formula: wherein R is an alkyl group having 1 to 8 carbon atoms, an aryl group, or a benzyl group, which has been obtained by ozone oxidation of a heptafluoroisobutenyl ether compound, to a reduction reaction in the presence of a reducing agent selected from dialkyl sulfide containing an alkyl group having 3 or 4 carbon atoms, diaryl sulfide, diaryl disulfide, and diaralkyl sulfide.

Method for producing hexafluoroacetone or hydrate thereof

Perfluoropolyether carboxylic acid fluoride having the following general formula:F(CFCFCFO)CFCFCOF

Process for producing perfluoropolyether carboxylic acid fluoride

In the production of 2,2,3,3-tetrafluorooxethane by reaction of tetrafluoroethylene with a compound of formaldehyde generation source in anhydrous hydrogen fluoride, the reaction is carried out in the presence of polyfluoroalkylcarboxylic acid or polyfluoroalkyl ester thereof, represented by the following general formula RfCOORf' (where Rf is a polyfluoroalkyl group having 1-5 carbon atoms, and Rf&#x2032; is a hydrogen atom or a polyfluoroalkyl group having 1-5 carbon atoms), preferably CFCOOH, CFCOOCHCFCF, or CFCOOCHCF, whereby a high reaction yield can be attained.

Process for producing 2,2,3,3,-tetrafluorooxetane

A polyfluoroalkyl ester of unsaturated carboxylic acid is produced in high yield in a more simple reactor and with much more reduction in the waste than the conventional process based on esterification reaction by subjecting a polyfluoroalkanol represented by the following general formula:Rf&#x2014;R&#x2014;OHwhere Rf is a polyfluoroalkyl group having 1&#x2013;6 carbon atoms and R is an alkylene group having 1&#x2013;6 carbon atoms, and an unsaturated carboxylic acid to dehydration reaction in a fluorine-containing solvent in the presence of an acid catalyst and a polymerization inhibitor.

Process for producing polyfluoroalkyl ester of unsaturated carboxylic acid

Process for producing monoester from dicarboxylic acid fluoride

Growing community of inventors

Ibaraki, Japan

Sunao Ikeda