Dainippon Ink and Chemicals, Incorporated

Nippon Soda Co., Ltd.

Takashi Hirokawa

Nagao Ariga

Ichirou Urihara

Yasuyuki Watanabe

Shoji Imamura

Takashi Gotou

Kazuaki Tsukuda

An object of the present invention is to provide an agricultural and horticultural water dispersible granule, which shows excellent properties of disintegrating and dispersing after being put into water, and which does not cause phytotoxicity, even in the case wherein an agricultural chemical technical product having a melting or softening point of 70&#xb0; C. or below, the formulation of which into water dispersible granules was difficult in the prior art, is used. The agricultural and horticultural water dispersible granule is produced by granulating a mixture containing an agricultural chemical technical product having a melting or softening point of 70&#xb0; C. or below, a salt of N-acylamino acid, and an adsorbent carrier. The agricultural and horticultural water dispersible granules as described above which further contain at least one of a formaldehyde condensate of aromatic sulfonate and a lignosulfonate. The agricultural and horticultural water dispersible granules as described above which further contain N-acylmethyltaurate.

Agricultural and horticultural water dispersible granule

A self-water dispersible particle made of a biodegradable polyester and a process for the preparation of an aqueous dispersion of self-water dispersible particles made of a biodegradable polyester containing a hydrophobic core material, which comprises reacting a biodegradable polyester containing hydroxyl group with a polyvalent carboxylic acid or anhydride or chloride thereof, dissolving or dispersing the biodegradable polyester having acid groups thus obtained and a hydrophobic core material in an organic solvent, adding a base to the solution with stirring to neutralize to form the salt of the biodegradable polyester, and then adding water to the solution or dispersion to undergo phase inversion emulsification are disclosed. According to the present invention, a self-water dispersible particle made of a biodegradable polyester having varied average particle diameters of the order of nanometer free of urethane bond and excellent in biodegradability, an aqueous dispersion thereof, a self-water dispersible particle made of a biodegradable polyester comprising a hydrophobic core material encapsulated therein excellent in gradual releasability such as pesticide, and a process for the simple preparation of these products without using any auxiliary stabilizing material such as emulsifying agent or any high speed agitator can be provided.

Self-water dispersible particle made of biodegradable polyester and process for the preparation thereof

Growing community of inventors

Sakura, Japan

Takashi Hirokawa