DEFOAMING AGENT, WATER-SOLUBLE RESIN COMPOSITION CONTAINING THE SAME, AND WATER-SOLUBLE RESIN AQUEOUS SOLUTION

摘要

PROBLEM TO BE SOLVED: To provide a defoaming agent excellent in defoaming property, capable of showing excellent defoaming property, especially regardless of a service temperature.;SOLUTION: A defoaming agent to be used contains a nonionic surfactant (A) whose cloud point in 1 wt% ion-exchange aqueous solution is 10-50°C and a nonionic surfactant (B) whose cloud point in 1 wt% ion-exchange aqueous solution is 0°C or lower which is out of a measurement limit, and further, preferably contains at least one kind of a nucleus agent (C) selected from a group comprising hydrophobic silica (Ca), fatty amide (Cb) and wax (Cc);SELECTED DRAWING: None;COPYRIGHT: (C)2017,JPO&INPIT