Shear resistant printing ink vehicles
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United States of America Patent
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Mar 22, 2011
Grant Date -
May 8, 2008
app pub date -
Oct 14, 2006
filing date -
Oct 18, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The specification describes a process for making gelled ink resins which exhibit improved properties such as lower viscosity under low shear and less viscosity decrease with increasing shear. In a preferred embodiment, a rosin-based or hydrocarbon-based resin is mixed with an organic solvent and reacted with a polyamine reactant, such as melamine-formaldehyde resin or hexamethylene diamine, under conditions sufficient to produce a substantially covalently cross-link gelled resin. The resulting gelled resin resists viscosity breakdown under high shear conditions and may be used directly for making ink compositions, obviating the need for further gelation and avoiding the use of conventional organo-metallic gelling agents.
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International Classification(s)
- C08G:MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN B....
- C08F:MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONL....
- C09F:NATURAL RESINS; FRENCH POLISH; DRYING-OILS; DRIERS....
- C08C:TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C09D:COATING COMPOSITIONS, e.g. PAINTS, VARNISHES, LACQ....
- C08L:COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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