04444699 is referenced by 40 patents and cites 6 patents.

A process is disclosed for performing encapsulation, en masse, by an in situ polymerization reaction to yield capsule wall material. The polymerization comprises a reaction between melamine and formaldehyde and/or polycondensation of monomeric methylol melamine or etherified methylol melamine, or a low molecular weight polymer thereof, in an aqueous vehicle and the reaction is conducted in the presence of negatively-charged, carboxyl-substituted polyelectrolyte material and certain salts, both dissolved in the vehicle. The disclosed encapsulation process permits the manufacture of microcapsules with more impermeable walls and/or lower capsule batch viscosities.

Title
Capsule manufacture
Application Number
6/370323
Publication Number
4444699
Application Date
April 20, 1982
Publication Date
April 24, 1984
Inventor
Donald E Hayford
Appleton
WI, US
Agent
Paul S Phillips Jr
E Frank McKinney
Assignee
Appleton Papers
WI, US
IPC
B01J 13/02
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