Rod-shaped polymer latex, rod-shaped polymer fine powder and dispersion comprising the fine powder dispersed in non-aqueous medium

摘要

A finely powdered polymer latex in the rod-like form having a major axis of from 0.1 to 100 microns and a minor axis of below 1/3 times the major axis. When the particles are dispersed in water at a concentration of 15 wt %, the thixotropy index, eta 3/ eta 30 is not less than 1.5. The polymer powder of the above size and configuration is useful in various fields including paint binders, diagnostic means and cosmetics. The polymer latex is prepared by solubilizing a polymerizable monomer in rod-shaped micelles, and polymerizing the monomer while keeping the rod-shaped micelle structure.