| 摘要 |
PROBLEM TO BE SOLVED: To obtain a hyperchromic agent capable of obtaining a high hyperchromic effect, excellent color fastness to rubbing and whitening preventive property, comprising an aqueous dispersion containing a specific fine particle, a specific acrylic resin and a silicone compound. SOLUTION: This hyperchromic agent is composed of an aqueous dispersion containing (A) preferably 5-55 wt.% of positively charged metal oxide-type fine particles (preferably produced by covering a silica fine particle with alumina, especially an alumina-covered silica-based compound obtained by treating the silica fine uartiele with basic aluminum chloride), (B) preferably 5-80 wt.% or a cationic acrylic resin having <=1.50, preferably <=1.48 refractive index and <=110 deg.C, preferably <=50 deg.C, more preferably <=20 deg.C glass transition point and (C) preferably 15-85 wt.% of a silicone compound (e.g. dimethylpolysiloxane). Preferably, the hyperchromic agent is attached on a fiber structural material and heat-treated. |
