Production method of porous spherical particles of vinyl polymer
AssigneeNitto Denko Corporation
InventorsTatsuya Konishi, Takeo Matsumura, Kenjiro Mori
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Abstract
The present invention provides a method of producing porous spherical particles, which includes suspension polymerization of a multifunctional monomer having two or more vinyl groups and a vinyl monomer having one vinyl group in an aqueous medium in the presence of a porogen and a distribution stabilizer, wherein the distribution stabilizer is polyvinyl alcohol having a saponification degree of 75 to 85 mol %. According to the method of the present invention, generation of particle agglomerates and large particles can be suppressed and porous spherical particles having a desired average particle size and a narrow particle size distribution can be conveniently produced.
Claims7
A method of producing porous spherical particles, which comprises suspension polymerization of a reaction system consisting essentially of:
- a multifunctional monomer having two or more vinyl groups and a styrene-based monomer,
- an aqueous medium,
- a porogen, and
- a distribution stabilizer,
- wherein the distribution stabilizer is polyvinyl alcohol having a saponification degree of 75 to 85 mol %, and the porous spherical particles have an average particle size of 20 to 150μm.
Dependencies are inferred from the claim text.