High solids cb printing ink

Details High solids cb printing ink High solids cb printing ink

C - Chemistry, Metallurgy

09

D

42/15, 6/26, 400

C09D 11/00 (2006.01) B41M 5/165 (2006.01)

Patent

CA 2008875

HIGH SOLIDS CB PRINTING INK Abstract of the Disclosure A high solids content, aqueous, microcapsule- containing printing ink is prepared by forming microcapsules in situ in a printing ink vehicle. The microcapsules are preferably prepared by interfacial polymerization or interfacial crosslinking between a reactant, such as a polyisocyanate dissolved in an oily solution and a coreactant such as a polysalt of casein and diethylene triamine present in an aqueous solution into which the oily solution is dispensed. The aqueous solution contains water and a non-volatile diluent such as a non-reducing sugar, for example methyl glucoside. The printing ink preferably has a 60-70% by weight solids content and may be used as a low-coat-weight CB coating for preparing carbonless copy paper.

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