Title:
WATER DISPERSION AND COATING AGENT
Document Type and Number:
Japanese Patent JP2019085530
Kind Code:
A
Abstract:
To provide a water dispersion which has low viscosity and has good physical properties and solvent resistance of the obtained film.SOLUTION: A water dispersion of a cellulose fine fiber (A) and a polyurethane resin (B) that satisfies the following conditions is obtained by mixing at least a water dispersion of an urethane prepolymer (b) solution and a cellulose fine fiber (A), and further chain elongating the urethane prepolymer (b) to obtain a polyurethane resin (B). (A-1) having a cellulose I type crystal structure. (A-2) an average fiber width of 3 nm or more and 5 μm or less. (A-3) a part of a hydroxyl group of cellulose is substituted with a substituent group represented by formula (1). In formula (1), Arepresents a linear or branched alkylene group having 3 or 4 carbon atoms, and Amay be the same or different. n represents an addition molar number of Aand an integer of 1 or more, and an average value of n is 1.00 or more and 5.00 or less.SELECTED DRAWING: None
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Inventors:
WATANABE SATOYA
KITANO YUKA
KITANO YUKA
Application Number:
JP2017216967A
Publication Date:
June 06, 2019
Filing Date:
November 10, 2017
Export Citation:
Assignee:
DAI ICHI KOGYO SEIYAKU CO LTD
International Classes:
C08L75/04; C08L1/02; C09D5/02; C09D101/02; C09D175/04