Micro-capsules and method for their production

Details Micro-capsules and method for their production Micro-capsules and method for their production

1978-09-27

1980-11-11

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

428307, 428914, B01J 1302

Patent

active

042331781

ABSTRACT:
A hydrophobic material such as an oil solution of a dye is dispersed by the aid of a styrene-maleic anhydride copolymer to form an aqueous dispersion, then a melamine-formaldehyde precondensate is added into said dispersion and the mixture is heated and hardened to produce micro-capsules. These micro-capsules are proof against leakage or oozing of the hydrophobic material and uniform in shape and can serve excellently, for example, as dye capsules used for non-carbon paper.

REFERENCES:
patent: 3069370 (1962-12-01), Jensen et al.
patent: 3594328 (1971-07-01), Schibler
patent: 4100103 (1978-07-01), Foris et al.

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