Patent ID: 11873443
Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
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.