Pigments treated with organo-phosphoric acids and their salts
AssigneeMillennium Inorganic Chemicals, Inc.
InventorsModasser El-Shoubary, Robert J. Kostelnik
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Abstract
A unique treatment for pigments is provided. This treatment, which uses certain organo-phosphoric acids and/or their salts, imparts improved physical and chemical qualities including lacing resistance, improved dispersion and decreased chemical reactivity when these treated pigments are incorporated into polymeric matrices.
Claims22
A pigment comprising a pigmentary base that has been treated with an organo-phosphoric acid compound having the formula:
- R′n—P(n−2)O4+[3(n−3)]
- wherein n=4-14;
- and each R′ is an organic group having from 2 to 22 carbon atoms or hydrogen and within any one molecule, any two or more R′ groups may be the same provided that at least one of the R′ groups is not hydrogen;
- and
- wherein the organo-phosphoric acid compound is present in an amount from about 0.01 percent to about 5 percent by weight based on the weight of the pigmentary base.
A pigment comprising a pigmentary base that has been treated with an organometaphosphate compound having the formula:
- (R″PO3)m
- wherein m=1-14, and each R″ is an organic group having from 2 to 22 carbon atoms or hydrogen and within any one molecule, any two or more R″ groups may be the same provided that at least one of the R″ groups is not hydrogen;
- and
- wherein the organometaphosphate compound is present in an amount from about 0.01 percent to about 5 percent by weight based on the weight of the pigmentary base.
A method for preparing a pigment, comprising combining a pigmentary base and an organo-phosphoric acid compound, wherein the organo-phosphoric acid compound has the formula:
- R′n—P(n−2)O4+[3(n−3)]
- wherein n=4-14;
- and each R′ is an organic group having from 2 to 22 carbon atoms or hydrogen and within any one molecule, any two or more R′ groups may be the same provided that at least one of the R′ groups is not hydrogen;
- and
- wherein the organo-phosphoric acid compound is present in an amount from about 0.01 percent to about 5 percent by weight of the pigmentary base, based on the weight of the pigmentary base.
A method for preparing a pigment, comprising combining a pigmentary base and an organometaphosphate compound, wherein the organometaphosphate compound has the formula:
- (R″PO3)m
- wherein m=1-14, and each R″ is an organic group having from 2 to 22 carbon atoms or hydrogen and within any one molecule, any two or more R″ groups may be the same provided that at least one of the R″ groups is not hydrogen;
- and
- wherein the organometaphosphate compound is present in an amount from about 0.01 percent to about 5 percent by weight of the pigmentary base, based on the weight of the pigmentary base.
Dependencies are inferred from the claim text.