Process for producing microcapsules

Details Process for producing microcapsules Process for producing microcapsules

1986-06-12

1988-05-24

Lovering, Richard D.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

42840221, 428914, 503215, B01J 1302

Patent

active

047464674

ABSTRACT:
The process for producing microcapsules comprises forming capsules having a wall film composed of an amine-aldehyde polycondensate in a system in which a hydrophobic core substance is dispersed or emulsified in an acid aqueous solution containing an anionic colloidal substance, said anionic colloidal substance being an anionic water-soluble copolymer composed of acrylic acid, styrenesulfonic acid, and alkyl acrylate or alkyl methacrylate. The present invention decreases the large particles present in the capsule slurry, and provides microcapsule which are excellent in emulsification power, emulsification stability, particle size distribution, impermeability of capsule-wall film and workability.

REFERENCES:
patent: 4251386 (1981-02-01), Saeki et al.
patent: 4353809 (1982-10-01), Hoshi et al.
patent: 4409156 (1983-10-01), Hoshi et al.
patent: 4450123 (1984-05-01), Egawa et al.

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