High solids interactive coating composition, ink jet...

Details High solids interactive coating composition, ink jet... High solids interactive coating composition, ink jet...

B - Operations, Transporting

41

M

B41M 5/00 (2006.01) B41M 5/52 (2006.01) C09D 129/04 (2006.01) C09D 131/04 (2006.01)

Patent

CA 2308685

A coating composition for an ink jet recording medium comprises an aqueous suspension of absorptive pigment, a binder, a sizing agent, and a cationic fixing agent. The coating composition combines solids content of greater than 30% with good runnability. The composition may preferably be dispersed at pH values in the range of 4.5 to 7Ø The pigment is preferably a mixture of 75% or more silica gel having a pore volume of 0.5-2.0 cc/g, and 10% or more alumina or alumina hydrate. A method for making down the coating composition includes the sequential steps of dispersing a polyvinyl alcohol binder in water, cooling the binder dispersion, dispersing a sizing agent, and mixing the suspension thoroughly before addition of a cationic fixing agent and pigment.

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