Tosoh Corporation

Nitto-denko Corporation

Kota Sakaguchi

Toru Doi

Masao Tanabiki

Tomoya Shimono

Shohei Yumino

Tomonari Nagai

Kazunari Iwanaga

Takahiro Kitagawa

Tohru Doi

Yasuyoshi Fujii

Masayasu Ito

Akira Inui

A fluororesin including a residue unit of formula (1) and having a haze value equal to 2% or less of a heat-press molded product (thickness 1 mm) with a small haze value of a melt-molded product and a method for producing the same. Rf, Rf, Rfand Rfeach independently represent one of the groups consisting of a fluorine atom, a linear perfluoroalkyl group having 1 to 7 carbon atoms, a branched perfluoroalkyl group having 3 to 7 carbon atoms, and a cyclic perfluoroalkyl group having 3 to 7 carbon atoms, the perfluoroalkyl group may have an ethereal oxygen atom, Rf, Rf, Rfand Rfmay be linked to each other to form a ring having 4 or more and 8 or less carbon atoms, and the ring may include an ethereal oxygen atom.

Method for producing fluororesin particles

Resin particles including a unit of formula (1) and having a volume average particle diameter 5 to 2000 μm, a method for producing, and a fluororesin comprising a unit of formula (1) and having a weight average molecular weight 5×10to 3×10, and a yellow index of a heat-melted molded product (thickness 3 mm) after 24 h at 280° C. of 6 or less,

Fluororesin, fluororesin particles, and methods for producing these

The present invention relates to resin particles including a residue unit represented by the following general formula (1) and having a volume average particle diameter equal to or more than 5 &#x3bc;m and equal to or less than 2000 &#x3bc;m, and a method for producing thereof. Furthermore the present invention relates to a fluororesin comprising a residue unit represented by a general formula (1) and having a weight average molecular weight Mw in a range of 5&#xd7;10to 3&#xd7;10, and a yellow index of a heat-melted molded product (thickness 3 mm) after 24 h at 280&#xb0; C. of equal to or less than 6, and a method for producing thereof. In the formula (1), Rf, Rf, Rf, and Rfare each independently one of the groups consisting of a fluorine atom, a linear perfluoroalkyl group having 1 to 7 carbon atoms, a branched perfluoroalkyl group having 3 to 7 carbon atoms, or a cyclic perfluoroalkyl group having 3 to 7 carbon atoms. The perfluoroalkyl group may have an ethereal oxygen atom. Further, Rf, Rf, Rf, and Rfmay be linked to one another to form a ring having 4 or more and 8 or less carbon atoms, and the ring may include an ethereal oxygen atom.

To provide a novel fumaric acid diester-cinnamic acid ester-based copolymer having a high molecular weight, which is expected to maintain excellent strength or ensures excellent toughness even when formed into a film, a method for efficiently producing the copolymer, and a film using the same. The fumaric acid diester-cinnamic acid ester-based copolymer contains a fumaric acid diester residue unit, a cinnamic acid ester residue unit having an alkyl group with a carbon number of 1 to 6, and a residue unit of a polyfunctional monomer having two or more radical polymerizable functional groups.

Fumaric acid diester-cinnamic acid ester-based copolymer, production method thereof and film using the same

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Mie, Japan

Kota Sakaguchi