SPHERICAL RESIN FINE PARTICLES, PROCESS FOR PRODUCING SPHERICAL RESIN FINE PARTICLES, AND SPACER FOR LIQUID CRYSTAL DISPLAY ELEMENT

摘要

The invention process for producing a seed polymerization method, even if the surface is smooth spherical resin fine particles, the spherical resin fine particles , and using the spherical resin fine particles, the surface is smooth and provides a spacer for a liquid crystal display device after the movement is difficult to occur, and scattering in the liquid crystal panel. ; is the spherical resin particles obtained by seed polymerization, by observing the surface with FE-SEM electron microscope, the surface protrusions appearing on the projection surface of the spherical resin fine particles in the tablet when the compartment as a single region, spherical resin particles having a diameter of the area appearing in the number of one-half of the diameter is equal to or less than 10 concentric spherical resin fine particles, and after dispersing the polymerizable unsaturated monomer and a polymerization initiator in water, having a weight average molecular weight of 2,000 to 15,000 while the weight average molecular weight / number average molecular weight is 1.6 or less seed particles and the degree of swelling of 10 to 100 times on absorbent, polymeric production method of the spherical resin fine particles to obtain a polymer by polymerizing an unsaturated monomer.