Daikin Industries, Ltd.

Osaka University

Otsuka Pharmaceutical Factory, Inc.

Otsuka Packaging Industries Co., Ltd.

Eiji Masuda

Tetsuya Uehara

Masayuki Tsuji

Kazuya Kawahara

Kayo Kusumi

Michio Matsuda

Akira Shimodo

Fujio Inoue

Akihiro Oshima

Yasuhiro Nakano

Kensuke Mohara

Kazuki Sakami

Daichi Shibazaki

Jirou Hiromoto

Shigeki Santou

Chisato Higashi

Kenta Shimada

Chisato Iguchi

A method for producing low-molecular-weight polytetrafluoroethylene containing a reduced amount of C4-C16 perfluorocarboxylic acids and salts thereof, as well as a powder containing low-molecular weight polytetrafluoroethylene, the method including (1) irradiating polytetrafluoroethylene containing a C4-C16 perfluorocarboxylic acid or any salt thereof and having a heat-of-fusion reduction of 40% or lower between first heating and second heating in differential scanning calorimetry with radiation to a dose of 5 to 1000 kGy substantially in the absence of oxygen at a temperature of lower than 100° C. to provide low-molecular-weight polytetrafluoroethylene containing a reduced amount of the perfluorocarboxylic acid and any salt thereof and having a melt viscosity at 380° C. of 1.0×10to×10Pa·s.

Low-molecular-weight polytetrafluoroethylene production method and powder

A method for producing low-molecular-weight polytetrafluoroethylene which includes: (1) irradiating high-molecular-weight polytetrafluoroethylene with radiation to a dose of 250 kGy or higher substantially in the absence of oxygen to provide low-molecular-weight polytetrafluoroethylene having a melt viscosity at 380° C. of 1.0×10to 7.0×10Pa·s. Also disclosed is a powder containing the low-molecular-weight polytetrafluoroethylene, the powder being substantially free from any of perfluorooctanoic acid and salts thereof.

Method for producing low-molecular weight polytetrafluoroethylene, and powder

A laminate including a target, a coating film of a lubricant containing a paraffin wax and carbon fluoride formed on the target. The carbon fluoride is graphite fluoride having a proportion of 0.1 to 2.0% by mass relative to the paraffin wax. Further, an amount of the carbon fluoride in a vicinity of a target on which the coating film is formed is larger than an amount of the carbon fluoride on a surface opposite the target. Also disclosed is a method of coating a target as well as snow or ice sliding equipment.

Fluorocarbon, lubricant for use on ice and snow, and coating method

A coating film exhibiting excellent water and oil repellency is provided. The coating film comprises (a) calcium carbonate having an average particle diameter of 600-9,000 nm, (b) poly(vinyl alcohol), and (c) a copolymer including constituent units of a monomer having a C6 or lower perfluoroalkyl group.

Coating film, composition for coating film, film-forming agent, article having coating film, and method for forming coating film

Provided is a molded body of a resin composition, which has improved easy wiping-off properties and scratch resistance. This resin composition contains (1) a thermoplastic resin and (2) a fluorine-containing copolymer; and the fluorine-containing copolymer (2) is a copolymer which comprises (a) a repeating unit formed from a fluorine-containing monomer represented by formula CH&#x2550;C(&#x2014;X)&#x2014;C(&#x2550;O)&#x2014;Y&#x2014;Z&#x2014;Rf, and (b) a repeating unit formed from a non-fluorine monomer having a hydrocarbon group with 14 or more carbon atoms, and which has a weight average molecular weight of 2,500-20,000.

Resin composition and molded body

Disclosed is a water and oil resistant agent comprising a fluorine-containing copolymer obtained by copolymerizing a (meth)acrylate monomer having a polyfluoroalkyl group having 1-6 carbon atoms, hydrophilic monomer, and monomer having an anion-donating group, which agent affords a superior water and oil resistance to a paper. The invention also discloses a process for treating a paper by the water and oil resistant agent and a treated paper thereby.

Water and oil resistant agent for paper, treatment process and paper

Disclosed is a water and oil resistant agent comprising a fluorine-containing copolymer obtained by copolymerizing a (meth)acrylate monomer having a polyfluoroalkyl group having 1 to 6 carbon atoms, the agent being able to afford a superior water and oil resistance to a paper. The invention also discloses a composition comprising the water and oil resistant agent, a process for treating a paper thereby and a treated paper thereby.

Water and oil resistant agent for paper and paper treatment process

Growing community of inventors

Osaka, Japan

Eiji Masuda