SPHERICAL MATERIAL CONSISTING OF CROSS-LINKED POLYMER AND PRODUCTION THEREOF

摘要

PROBLEM TO BE SOLVED: To obtain spherical materials composed of a cross-linked polymer and having a small limitation of the particle diameter of joined cross linked polymer particles, less detrimental to the original function of the particle, since the surface of the particles has parts not coated with an organic binder, capable of reusing the cross-linked polymer particles and also easy for production. SOLUTION: The spherical particles consisting of a cross-linked polymer are the spherical material having 1μm-100 mm particle diameter composed of cross linked polymer particles having 0.1μm-10 mm particle diameter and <=100% of the mean particle diameter of the standard deviation in the particle diameter distribution, and satisfy the following (A) to (C). (A) The cross-linked polymer particles are joined each other mediated by an organic binder. (B) There exist exposed parts without covered by the organic binder in the surface of the cross-linked polymer particles. (C) There exist spaces among the joined cross-linked polymer particles each other.