Pigments treated with organosulfonic compounds
AssigneeMillennium Inorganic Chemicals, Inc.
InventorsModasser El-Shoubary, Robert Kostelnik, Charles Wheddon
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Abstract
A treatment for pigments is provided. This treatment, which uses certain organosulfonic compounds, imparts improved physical and chemical qualities including lacing resistance, improved dispersion and decreased chemical reactivity when these treated pigments are incorporated into polymeric matrices. The addition of organosulfonic compounds may flexibly be incorporated into known processes at varying points, and are preferably added downstream of any filtering steps.
Claims20
A pigment comprising:
- a. a pigmentary base, wherein said pigmentary base is not activated by a metal ion;
- and
- b. an organosulfonic compound having the formula:
- (R—SO3)xMx+
- wherein x=1, 2, 3 or 4
- M is selected from the group consisting of hydrogen, ammonium, organoammonium ions or metal ions with a valence of +1, +2, +3 or +4, and
- R is an organic group having from 2 to 22 carbon atoms.
A method for preparing a pigment, comprising:(i) filtering a slurry, said slurry comprising a pigmentary base;
- and (ii) combining said pigmentary base after said filtering with an organosulfonic compound, wherein said organosulfonic compound has a formula of:
- (R—SO3)xMx+
- wherein x=1, 2, 3 or 4
- M is selected from the group consisting of hydrogen, ammonium, organoammonium ions or metal ions with a valence of +1, +2, +3 or +4 and R is an organic group having from 2 to 22 carbon atoms.
A method for preparing a pigment, comprising combining a dry pigmentary base and an organosulfonic compound, wherein said organosulfonic compound has a formula of:
- (R—SO3)xMx+
- wherein x=1, 2, 3 or 4
- M is selected from the group consisting of hydrogen, ammonium, organoammonium ions or metal ions with a valence of +1, +2, +3 or +4 and R is an organic group having from 2 to 22 carbon atoms.
Dependencies are inferred from the claim text.