COMPLEX HOLLOW POLYMER PARTICLE, ITS PRODUCTION, COMPLEX LOADING MATERIAL FOR PAPER COMPOSED OF THE COMPLEX HOLLOW POLYMER PARTICLE AND PAPER CONTAINING THE INTERNALLY ADDED LOADING MATERIAL

摘要

PROBLEM TO BE SOLVED: To obtain a complex loading material having excellent optical characteristics such as intensity characteristics in internal addition to paper, whiteness and opacity by preparing an aqueous dispersion of complex hollow polymer particle to which a polymer electrolyte is connected and which has a positive zeta potential. SOLUTION: A polymer electrolyte such as an amphoteric polyacrylamide in an amount of >=0.1 pt.wt., preferably 0.5-50 pts.wt., more preferably 1-20 pts.wt. is connected to 100 pts.wt. of a hollow polymer particle composed of a polystyrene-based polymer and/or a poly(meth)acrylate-based polymer to give a complex hollow polymer particle. An aqueous dispersion of the complex hollow polymer particle having a positive zeta potential is prepared to give a complex loading material for paper. The complex loading material for paper is internally added to a pulp slurry to make a paper.