Color filter array

Claim 2

A color filter array comprising: a first layer having a first mordant of a first polarity and a color dye of a second, opposite polarity, and a second layer having a second mordant of a second polarity and a color dye of the first polarity to thereby prevent cross-dyeing.

Claim 3

A color filter array comprising: a first layer having an cationic mordant and an anionic color dye; and a second layer having anionic mordant and a cationic dye to thereby prevent cross-dyeing.

Claim 4

A color filter array comprising: a first layer having an cationic mordant and an anionic color dye; and a second layer having anionic mordant and a cationic dye to thereby prevent cross-dyeing.

Claim 5

The invention as set forth in claim 1 wherein the cationic mordant is: ##STR16## wherein: R 1 and R 2 are the same or different and are aryl, aralkyl, or alkaryl having from 6 to about 20 carbon atoms or an alkyl group having from 1 to about 10 carbon atoms; n is 0, 1, or 2; R 3 and R 4 are either both hydrogen or, together with the carbon atom to which they are attached, form a saturated, unsaturated, or aromatic ring or ring system containing from 5 to 10 carbon atoms such as cyclohexyl, cyclopentyl, phenyl, and naphthyl; X.sup.⊖ is an anion, such as halide; e.g. chloride, methosulfate, or p-toluenesulfonate and the anionic mordant is: ##STR17## wherein: R 1 is straight or branched chain alkylene containing 2 to 10 carbon atoms, such as ethylene, propylene, butylene, trimethylene, 2,2-dimethyl-1,3-propylene, or 1,10-decylene; a cycloalkylene group containing 5 or 6 carbon atoms, such as 1,4-cyclohexylene or 1,4-cyclohexylene-dimethylene; or an aliphatic ether group containing 3 to 12 carbon atoms in the aliphatic ether chain, such as oxydiethylene and ethylenebis(oxyethylene); R 2 is an aromatic group containing 6 to 12 carbon atoms, such as phenylene or naphthylene; R 3 is straight or branched chain alkylene containing 2 to 10 carbon atoms, such as ethylene, propylene, butylene, 2,2-dimethyl-1,3-propylene, and 1,10-decylene; and R 4 is an anionic group selected from those having the structures: ##STR18## wherein: M.sup.⊕ is an alkali metal or ammonium ion; x is 50 to 100 mole percent; v is 0 to 35 mole percent; w is 0 to 35 mole percent; y is 50 to 85 mole percent; and z is 15 to 40 mole percent.