Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-05-24
1999-09-07
Reddick, Judy M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524474, 524484, 524490, 524513, 524508, 5251355, 5253277, C08L 9100
Patent
active
059488433
ABSTRACT:
A lithographic printing ink contains an ester-modified carboxyl-containing copolymer as a pigment dispersant. The ester-modified carboxyl-containing copolymer is the reaction product of a long chain alcohol and a styrene maleic anhydride copolymer, wherein at least 35% of the carboxyl groups of the styrene maleic anhydride copolymer are esterified. The ink further includes a liquid carrier resin; a pigment; and a solvent selected from the group consisting of aliphatic hydrocarbons, aromatic hydrocarbons, and mixtures thereof and/or a modifying oil. The pigment dispersants improve color development when incorporated into the ink during the grinding stage.
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Boutier Robert H.
Heilman Michael F.
McEuen Bruce K.
Elf Atochem North America Inc.
Reddick Judy M.
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