The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 2016
Filed:
Apr. 26, 2013
Teruhiko Ohara, Tokyo, JP;
Naoki Suzuki, Niigata, JP;
Yasuko Nakajima, Kanagawa, JP;
Hiroto Itou, Mie, JP;
Takayuki Aoshima, Kanagawa, JP;
Naoki Sugai, Kanagawa, JP;
Takanao Matsumoto, Kanagawa, JP;
Teruhiko Ohara, Tokyo, JP;
Naoki Suzuki, Niigata, JP;
Yasuko Nakajima, Kanagawa, JP;
Hiroto Itou, Mie, JP;
Takayuki Aoshima, Kanagawa, JP;
Naoki Sugai, Kanagawa, JP;
Takanao Matsumoto, Kanagawa, JP;
MITSUBISHI CHEMICAL CORPORATION, Tokyo, JP;
Abstract
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° C. is not more than 3.7.