Composite hollow particles

摘要

Disclosed is composite hollow particles which are excellent in solvent resistance and mechanical stability and have strong walls and which can be easily synthesized. The composite hollow particles are prepared by uniformly dispersing the following ingredients in an aqueous medium; (a) an ethylenically unsaturated monomer having at least two radical polymerizable double bonds in one molecule, (b) another polymerizable monomer which is different from the monomer (a), (c) organic particles having an average particle size of 0.01 to 5 micrometer, (d) a initiator, and (e) a dispersant, and then dispersion-polymerizing.