Pigments of improved dispersibility in thermoplastic resins
AssigneeKerr-McGee Chemical Corporation
InventorRodney D. Stramel
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Abstract
A pigment composition of improved dispersibility in thermoplastic resins and concentrates of the pigment composition in thermoplastic resin are provided. The pigment composition is comprised of an inorganic pigment such as titanium dioxide having an organophosphate ester treating agent deposited thereon.
Claims12
A pigment composition of improved dispersibility in thermoplastic resins comprising an inorganic pigment having deposited thereon an organophosphate ester treating agent corresponding to the general formula [RO(R'O).sub.x ].sub.3 PO wherein R is a monovalent lower alkyl radical containing from about 2 to 4 carbon atoms, R' is a divalent hydrocarbon radical selected from the group consisting of ethylene and propylene radicals, and x is a number of from about 1 to about 15, said organophosphate treating agent being deposited upon said pigment in an amount of at least about 0.1 percent by weight based upon the weight of said pigment.
A process for preparing a pigment composition comprising:
- providing an inorganic pigment;
- and
- depositing an organophosphate ester treating agent corresponding to the general formula [RO(R'O).sub.x ].sub.3 PO wherein R is a monovalent lower alkyl radical containing from 2 to 4 carbon atoms, R' is a divalent hydrocarbon radical selected from the group consisting of ethylene and propylene radicals, and x is a number of from about 1 to about 15 directly on said inorganic pigment, said organophosphate treating agent being deposited upon said inorganic pigment in an amount of at least about 0.1 percent by weight based upon the weight of said pigment.
Dependencies are inferred from the claim text.