Mitsubishi Chemical Corporation

Teruhiko Ohara

Takayuki Aoshima

Naoki Suzuki

Yasuko Nakajima

Takanao Matsumoto

Hiroto Itou

Naoki Sugai

Masanori Yamamoto

Hiroto Ito

Haruhiko Kusaka

Kazunao Kusano

Kazuki Wakabayashi

Takashi Komaya

Haruo Iiduka

Kentaro Uchino

A novel polycarbonate diol is useful as a raw material for producing a polycarbonate diol-based polyurethane with a high degree of hardness, superior abrasion resistance, and superior hydrophilicity. The polyurethane is useful in paints, coating agents, synthetic leathers, artificial leathers, and highly-functional elastomers, or the like. The polycarbonate diol is also useful for producing an active-energy radiation curable polymer composition giving a cured film having superior contamination resistance and high degree of hardness. The curable polymer composition contains a urethane(meth)acrylate oligomer obtained from the polycarbonate diol. The polycarbonate diol is obtained, for example, by reacting two specific types of diols with diester carbonate in the presence of a transesterification catalyst. The catalyst has a metal of Group 1 or 2 on the periodic table. A metal content of the transesterification catalyst is 100 weight ppm or less.

Polycarbonate diol and producing method thereof, and polyurethane and active energy ray-curable polymer composition both formed using same

The invention relates to a method for producing a biomass-resource-derived polyurethane, which comprises: reacting a dicarboxylic acid and an aliphatic diol to produce a polyester polyol; and reacting the polyester polyol and a polyisocyanate compound, wherein the dicarboxylic acid contains at least one component derived from biomass resources, a content of an organic acid in the dicarboxylic acid is more than 0 ppm and not more than 1,000 ppm relative to the dicarboxylic acid, and a pKa value of the organic acid at 25&#xb0; C. is not more than 3.7.

Biomass-resource-derived polyurethane, method for producing same, and biomass-resource-derived polyester polyol

Growing community of inventors

Tokyo, Japan

Teruhiko Ohara