Arakawa Chemical Industries, Ltd.

Naoyuki Kawashima

Akihisa Inoue

Taichi Maruyama

Shinji Tonsho

Naoyuki Makiuchi

An emulsion composition according to the present invention includes: a polymerizable compound comprising two or more (meth)acryloyl groups; a surfactant; and a dispersion medium including water as a principal component, in which an oil droplet diameter Dcorresponding to a diameter at cumulative 90% by volume in the oil droplet size distribution of oil droplets comprising the polymerizable compound and the surfactant, measured according to a laser diffraction and scattering measurement process is less than 1.8 &#x3bc;m. A maximum oil droplet diameter Dof the oil droplets, measured according to the laser diffraction and scattering measurement process is preferably less than 4.0 &#x3bc;m. A content of the polymerizable compound in the composition with respect to 100 parts by mass of a total of components other than the dispersion medium is preferably no less than 40 parts by mass. The oil droplets may further comprise an inorganic particle.

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Tokyo, Japan

Naoyuki Kawashima