Method for modifying the surface of microcapsule

Details Method for modifying the surface of microcapsule Method for modifying the surface of microcapsule

1990-06-19

1992-05-12

Stoll, Robert L.

Compositions

Solids with solution or dispersion aids

264 433, 264 47, 42721331, 42721334, 42840221, 252357, C08L 6120, B01J 1320, C09D 1100, C07J 702

Patent

active

051125269

ABSTRACT:
A method for modifying the surface of the microcapsule consisting of an outer layer composed of a urea-formaldehyde copolymer, a melamine-formaldehyde copolymer or a urea-melamine-formaldehyde terpolymer and an inner phase composed of hydrophobic organic components, the method comprises contacting the microcapsule with a water-immiscible organic solvent and at least one member selected from the group of compound of general formula (I) ##STR1## wherein R is an alkyl group having 8 to 22 carbon atoms; x and y are each a whole number not less than 0 and their sum is a whole number of not more than 60, provided that x and y cannot be simultaneously equal to 0.

REFERENCES:
patent: 1923178 (1933-08-01), Ulrich et al.
patent: 2809948 (1957-10-01), Hunter et al.
patent: 4062799 (1977-12-01), Matsukawa et al.
patent: 4093556 (1978-06-01), Wojciak
patent: 4936916 (1990-06-01), Shinmitsu et al.

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