Title:
METHOD FOR PRODUCING POLYURETHANE CONTAINING CELLULOSE NANOFIBERS
Document Type and Number:
WIPO Patent Application WO/2019/172058
Kind Code:
A1
Abstract:
[Problem] The purpose of the present invention is to provide a method for producing a polyurethane containing cellulose nanofibers, which does not require crushing of cellulose in a polyol, use of water, and a surface treatment of cellulose for the purpose of enhancing the dispersibility in resins, and which is suitable as a starting material for artificial leathers, synthetic leathers, adhesives, painting materials, coating agents and the like.
[Solution] A method for producing a polyurethane containing cellulose nanofibers, which comprises the following steps (a)-(c).
(a) A step for obtaining a carbonic acid ester dispersion of cellulose nanofibers by dispersing cellulose nanofibers in a carbonic acid ester.
(b) A step for obtaining a cellulose nanofiber-containing polycarbonate diol dispersion by having the carbonic acid ester dispersion react with a diol compound.
(c) A step for obtaining a polyurethane containing cellulose nanofibers by having the polycarbonate diol dispersion react with an isocyanate compound.
Inventors:
TAGUCHI HIROMU (JP)
ISHIKAWA KOUJI (JP)
ISHIKAWA KOUJI (JP)
Application Number:
PCT/JP2019/007720
Publication Date:
September 12, 2019
Filing Date:
February 28, 2019
Export Citation:
Assignee:
TOAGOSEI CO LTD (JP)
International Classes:
C08G18/08; C08G18/44; C08G64/20; C08L69/00; C08L75/04
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