Spray drying of microcapsule dispersions

Details Spray drying of microcapsule dispersions Spray drying of microcapsule dispersions

1983-07-12

1984-12-18

Lovering, Richard D.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

252194, 252385, 42840221, B01J 1302

Patent

active

044890176

ABSTRACT:
A process for spray drying aqueous suspensions of microcapsules having walls of polyurea which have been formed in known manner from polyisocyanate and polyamine by interface polyaddition, in which from 1 to 10 parts by weight, based on the microcapsules, of a water-soluble silicate and/or a water-soluble alkaline earth metal salt or hydroxide are added to the aqueous reaction mixture of polyisocyanate and polyamine.

REFERENCES:
patent: 1883024 (1932-10-01), Smith
patent: 2033934 (1936-03-01), Grebe et al.
patent: 3575882 (1971-04-01), Vandegaer et al.
patent: 3796669 (1974-03-01), Kiritani et al.
patent: 3836383 (1974-09-01), Kiritani et al.
patent: 3954678 (1976-05-01), Marquisee

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