Process for the preparation of microcapsules using a salt of a p

Details Process for the preparation of microcapsules using a salt of a p Process for the preparation of microcapsules using a salt of a p

1993-04-27

1994-05-10

Raymond, Richard L.

Plant protecting and regulating compositions

Plant growth regulating compositions

424408, 5147723, 71DIG1, A01N 2528

Patent

active

053107217

ABSTRACT:
This invention relates to a process for encapsulation and particularly for the preparation of microcapsules having a capsule wall of a solid polymeric substance enclosing a water-immiscible material, which process comprises preparing a solution of a first reactive component required to form the capsule wall in the water-immiscible material, then dispersing the mixture in an aqueous medium containing a surfactant which is a salt of a partial ester of a styrene-maleic anhydride copolymer, to form an oil-in-water emulsion, and subsequently adding a second reactive component required to form the capsule wall which is complementary to the first one and reacts with it under the mixing conditions, whereby a solid polymeric wall is formed about the dispersed water-immiscible material. The resulting stable aqueous suspension of microcapsules can either be used directly or after dilution with water, or the microcapsules can be separated from the aqueous phase.

REFERENCES:
patent: 3577515 (1971-05-01), Vandegaer
patent: 4233178 (1980-11-01), Fuchigami
patent: 4280833 (1981-07-01), Beestman
patent: 4417916 (1983-11-01), Beestman
patent: 4533599 (1985-08-01), Okumura
patent: 4563212 (1986-01-01), Becher
patent: 4601863 (1986-07-01), Shioi et al.
patent: 4630079 (1986-12-01), Kosaka
patent: 4640709 (1987-02-01), Beestman
patent: 4681806 (1987-07-01), Matkan et al.
patent: 4876290 (1989-10-01), Vivant
patent: 4938797 (1990-07-01), Hasslin et al.
patent: 5091280 (1992-02-01), Yamaguchi
JPA-60216839, Mitsubishi Seiki/Abstract, 1985.
SMA Resins General Bulletin Atochem N. America In (C1989).
SMA Resins as Dispersants Agricultural Appl. Atochem In (C1987).
SMA 1440H Resins as a Pigment Dispersant Acrylic Latex Semi Gloss Paint, Oct. 1990.
SMA 1440H Dispersed Semi-Gloss Latex Paint Formulation for Universal Tinting Systems, Oct. 1990.

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