Post-treatment of polyurea microcapsules

Details Post-treatment of polyurea microcapsules Post-treatment of polyurea microcapsules

B - Operations, Transporting

01

J

117/45.4

B01J 13/02 (2006.01) B01J 13/20 (2006.01) C08G 18/10 (2006.01) C08G 18/30 (2006.01)

Patent

CA 1085238

° IN THE UNITED STATES PATENT AND TRADEMARK OFFICE POST-TREATMENT OF POLYUREA MICROCAPSULES Abstract of the Disclosure Post-treatment of microcapsules having polyurea walls with ammonia or amines to reduce the residual isocyanate level and modify permeability of the microcapsule wall. Flowable formulations of the polyurea micro- capsules then can be stored at pH values below 8 without generating carbon dioxide from the reaction of residual isocyanate groups with water.

271853

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