Arakawa Kagaku Kogyo Kabushiki Kaisha

Toshiharu Okumichi

Kimio Kawatani

Osamu Oseto

Shigenori Thuzimoto

Keizo Matsumoto

Hisanari Sanda

This invention provides a process for preparing an aqueous dispersion of a rosin-base material by a so-called inversion method, the process being characterized in that the dispersant is at least one member selected from the group consisting of:

Process for preparing aqueous dispersion of rosin-base materials

This invention provides a sizing composition for cellulosic fiber sheets comprising water and finely divided solid particles dispersed in the water, said particles being a uniform mixture of about 40 to about 96% by weight of a ketene dimer and about 4 to about 60% by weight of a noncrystalline hydrocarbon resin; and a process for preparing the sizing composition. The sizing composition of this invention is excellent both in sizing effects and in stabilities.

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Suita, Japan

Toshiharu Okumichi