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Title:
METHOD FOR PRODUCING MICROCAPSULES HAVING IMPROVED WALL CHARACTERISTICS
Document Type and Number:
WIPO Patent Application WO2001070385
Kind Code:
A3
Abstract:
A process for forming microcapsules having substantially impermeable microcapsule walls comprising the steps of: forming an emulsion of an internal phase in a continuous aqueous phase, the internal phase including a photosensitive composition and a polyvalent isocyanate, the continuous aqueous phase including a sulfonated polystyrene, at least one of the internal phase or the continuous aqueous phase further including a hydrophilic polymer; and enwrapping particles of the internal phase in an amine-formaldehyde condensation product produced by in situ condensation of an amine and formaldehyde is disclosed.

Inventors:
CAMILLUS JOSEPH
KATAMPE IBRAHIM
Application Number:
PCT/US2001/007394
Publication Date:
May 23, 2002
Filing Date:
March 08, 2001
Export Citation:
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Assignee:
CYCOLOR INC (US)
International Classes:
G03F7/004; B01J13/10; B01J13/16; B01J13/18; G03F7/00; (IPC1-7): B01J13/18; B01J13/10; G03F7/00
Foreign References:
EP0433094A11991-06-19
US5011885A1991-04-30
US6037094A2000-03-14
US4962010A1990-10-09
US5283015A1994-02-01
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