Capsule manufacture

Details Capsule manufacture Capsule manufacture

B - Operations, Transporting

01

J

117/45.3

B01J 13/02 (2006.01) B01J 13/18 (2006.01) B41M 5/165 (2006.01) C08L 61/28 (2006.01)

Patent

CA 1188164

Abstract of the Disclosure 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 poly- condensation of monomeric methylol melamine or etherified methylol melamine, or a low molecular weight polymer thereof, in an aqueous vehicle and the reaction is con- ducted 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.

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