Microcapsules with improved polyurea walls

Details Microcapsules with improved polyurea walls Microcapsules with improved polyurea walls

1987-10-07

1989-07-11

Terapane, John F.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

503215, 264 43, B01J 1302, B41M 522

Patent

active

048471526

ABSTRACT:
Improved microcapsules contain at least one wall which is the reaction product of at least one isocyanate-reactive group and an aromatic isocyanate which has
the formula: ##STR1## in which n=8 to 20. The microcapsules are useful in carbonless copy paper.

REFERENCES:
patent: 3577515 (1971-05-01), Vandegaer
patent: 3900669 (1975-08-01), Kiritani
patent: 4360376 (1981-04-01), Koestler
patent: 4428978 (1984-01-01), Jabs et al.
patent: 4465755 (1984-08-01), Kiritani et al.
patent: 4497793 (1985-02-01), Simkin
patent: 4592957 (1986-06-01), Dahm et al.
patent: 4599271 (1986-07-01), Chao
patent: 4668580 (1987-05-01), Dahm et al.
patent: 4729792 (1988-03-01), Seitz
patent: 4761255 (1988-08-01), Dahm et al.
patent: 4778781 (1988-10-01), Washizu et al.
Chemical Abstracts, p. 56, vol. 80, 1974.

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