Process for hardening microcapsules

Details Process for hardening microcapsules Process for hardening microcapsules

1979-06-05

1981-04-07

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

282 275, 427340, 428307, 428914, B01J 1302

Patent

active

042605156

ABSTRACT:
A process for hardening microcapsules having walls of synthetic polymers containing groups reactive toward aldehyde groups, wherein hardening is effected by means of a methylolmelamine or an ether thereof at a slightly acidic to slightly alkaline pH.
Very impermeable microcapsules are obtained, which are suitable for the manufacture of colorless no-carbon papers.

REFERENCES:
patent: 2800457 (1957-07-01), Green et al.
patent: 2800458 (1957-07-01), Green
patent: 2886445 (1959-05-01), Rosenthal et al.
patent: 3677813 (1972-07-01), Eckert et al.
patent: 3778383 (1973-12-01), Schibler et al.
patent: 3872023 (1975-03-01), Baum et al.

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