US 11,873,443 B2
Composition and production method of same, and dispersing agent
Akihiko Nakamura, Tokyo (JP); Kanae Takahashi, Tokyo (JP); Takuma Nakamura, Tokyo (JP); Sumio Tamura, Tokyo (JP); and Tubasa Kanenaka, Tokyo (JP)
Assigned to NIPPON PAPER INDUSTRIES CO., LTD., Kita-ku (JP)
Appl. No. 17/265,399
Filed by NIPPON PAPER INDUSTRIES CO., LTD., Kita-ku (JP)
PCT Filed Aug. 8, 2019, PCT No. PCT/JP2019/031511
§ 371(c)(1), (2) Date Feb. 2, 2021,
PCT Pub. No. WO2020/032216, PCT Pub. Date Feb. 13, 2020.
Claims priority of application No. 2018-150844 (JP), filed on Aug. 9, 2018; application No. 2018-152860 (JP), filed on Aug. 15, 2018; and application No. 2018-154157 (JP), filed on Aug. 20, 2018.
Prior Publication US 2021/0292632 A1, Sep. 23, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 8/035 (2006.01); C04B 24/18 (2006.01); C04B 24/20 (2006.01); C04B 28/14 (2006.01); C08H 7/00 (2011.01); C09K 8/467 (2006.01); C04B 103/40 (2006.01)
CPC C09K 8/035 (2013.01) [C04B 24/18 (2013.01); C04B 24/20 (2013.01); C04B 28/14 (2013.01); C08H 6/00 (2013.01); C09K 8/467 (2013.01); C04B 2103/408 (2013.01)] 14 Claims
 
1. A liquid composition, comprising:
a lignin sulfonic acid-based compound;
an aromatic water-soluble compound; and
a reaction product of the lignin sulfonic acid-based compound with the aromatic water-soluble compound,
wherein a peak area ratio represented by the following formula is at least 70%,
([b]−[a])/[b],
wherein [b] is a gel permeation chromatography (GPC) peak area, at detection wavelength of 280 nm, of the aromatic water-soluble compound before the reaction and [a] is a GPC peak area of the aromatic water soluble compound after the reaction; and
when the liquid composition is dried using a fan dryer at 100° C. for 24 hours to obtain a nonvolatile content, and dissolving the nonvolatile content in water to obtain a first aqueous solution in which a concentration of the nonvolatile content is from 28 to 32% by mass, a B type viscosity of the first aqueous solution is from 30 to 100 mPa·s.