Taisei Chemical Industries, Ltd.

Kazuo Yanauchi

Takashi Sunamori

Kiyoshi Shingae

Takayoshi Yamazaki

A process for producing a solid dispersion comprising a resin and a functional compound dispersed therein, which comprises: kneading a powdery functional compound together with deionized water while gradually introducing the deionized water; adding a resin and, according to need, an additive to the mixture; subsequently heating and kneading the resultant mixture in a vessel which has an atmosphere causing the resin to soften at a temperature not higher than the boiling point of the deionized water and which has been tightly closed according to need so as to function like a pressure cooker to thereby disperse the functional compound into the softened resin; and kneading the resultant dispersion with heating at ordinary pressure or a reduced pressure to remove the water by vaporization.

Process for producing solid dispersion of finely particulate functional compound

Provided is a paint having ultraviolet absorbability and curing function comprising as an essential component an isocyanate compound (A) which has a functional group having ultraviolet absorbability on a side chain and contains residual isocyanate group and which is obtained by reacting a part of isocyanate groups of an isocyanate prepolymer and/or monomer having at least two free isocyanate groups with an ultraviolet absorber having active hydrogen, and, if necessary, additionally comprising an optional isocyanate prepolymer (B) other than (A), and further provided is a paint superior in weather resistance obtained by reacting said paint with a polymeric compound having active hydrogen. Thus, there can be provided a paint excellent in long-term weather resistances such as gloss retention and discoloration resistance in long-term outdoor use.

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Funabashi, Japan

Kazuo Yanauchi