04552811 is referenced by 48 patents and cites 10 patents.

A process is disclosed for performing encapsulation, en masse, by an in situ polymerization reaction to yield capsule wall material. The reaction comprises the polymerization of urea and formaldehyde, or monomeric or low molecular weight polymers of dimethylol urea or methylated dimethylol urea, melamine and formaldehyde, monomeric or low molecular weight polymers of methylol melamine or methylated methylol melamine, in an aqueous vehicle and the reaction is conducted in the presence of certain acrylic acid copolymers. The disclosed encapsulation process provides improved resistance of the emulsion of intended capsule core material to destabilization and permits the manufacture of microcapsules with improved drop size distribution, improved resistance to frictional smudge damage and enhanced impermeability.

Title
Capsule manufacture
Application Number
517296
Publication Number
4552811
Application Date
June 12, 1984
Publication Date
November 12, 1985
Inventor
Richard P Bowman
Appleton
WI, US
Robert W Brown
Appleton
WI, US
Agent
Paul S Phillips Jr
E Frank McKinney
Assignee
Appleton Papers
WI, US
IPC
B01J 13/02
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