Microcapsules with reduced shell wall permeability

Details Microcapsules with reduced shell wall permeability Microcapsules with reduced shell wall permeability

1996-01-11

1998-09-08

Nakarani, D. S.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

4283215, 428331, 4284022, 42840221, B32B 516

Patent

active

058042989

ABSTRACT:
Incorporation of inorganic colloidal particles into an encapsulation dispersion results in microcapsules having polymer shell walls further comprising colloidal inorganic particles. Capsules prepared in this manner have been found to be smaller in size, have a narrower size distribution, and exhibit decreased shell wall permeability. Capsules prepared using these colloidal particle dispersions are particularly useful in carbonless imaging constructions such as those containing a fill solution of a color precursor in a hydrophobic solvent and form deeply colored images when combined with a color developer.

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