Mct oil-coated titanium dioxide pigment for use in plastics
AssigneeTronox LLC
InventorsQuan Su, Venkata Rama Rao Goparaju, Keven Stone, Charles Stewart Christ, JR.
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Abstract
A process for producing a treated, titanium dioxide pigment for use in a polymer composition is provided. The process comprises providing a plurality of titanium dioxide pigment particles, each of the particles having a surface, and depositing an organic treating agent on the surfaces of the pigment particles in an amount in the range of from about 0.2% to about 2% by weight, based on the weight of the pigment particles. The organic treating agent includes at least one medium-chain triglyceride. A treated, titanium dioxide pigment for use in a polymer composition, and a polymer composition, are also provided.
Claims25
A process for producing a treated, titanium dioxide pigment for use in a polymer composition, comprising:
- providing a plurality of titanium dioxide pigment particles, each of said particles having a surface;
- and
- depositing an organic treating agent on said surfaces of said pigment particles in an amount in the range of from about 0.2% to about 2% by weight, based on the weight of said pigment particles, wherein said organic treating agent includes at least one medium-chain triglyceride.
A process for producing a treated, titanium dioxide pigment for use in a polymer composition, comprising:
- (a) providing a plurality of titanium dioxide pigment particles;
- (b) after step (a), forming an aqueous slurry of said titanium dioxide pigment particles;
- (c) after step (b), reducing the particle size of said titanium dioxide particles in the aqueous slurry to a desired particle size;
- (d) after step (c), depositing at least one inorganic treating agent onto the surfaces of the titanium dioxide pigment particles in said aqueous slurry;
- (e) after step (d), filtering said treated titanium dioxide pigment particles to form a filter cake that includes the treated, titanium dioxide pigment particles;
- (f) after step (e), mixing an organic treating agent with said filter cake to deposit said organic treating agent on said titanium dioxide particles, wherein said organic treating agent includes at least one medium-chain triglyceride;
- (g) after step (e), drying said filter cake;
- and
- (h) after step (g), reducing the particle size of said treated, titanium dioxide particles forming the filter cake to a desired particle size.
The process of claim 14, wherein said organic treating agent is a second organic treating agent, and said process further comprises:
- depositing a first organic treating agent on said surfaces of said pigment particles.
A treated, titanium dioxide pigment for use in a polymer composition, comprising:
- a plurality of titanium dioxide pigment particles, each of said particles having a surface;
- an inorganic treating agent deposited on said surfaces of said pigment particles;
- and
- an organic treating agent deposited on said surfaces of said pigment particles on top of said inorganic treating agent in an amount in the range of from about 0.2% to about 2% by weight, based on the weight of said pigment particles, wherein said organic treating agent includes at least one medium-chain triglyceride.
A polymer composition, comprising:
- at least one polymer;
- and
- a treated, titanium dioxide pigment, said pigment including:
- a plurality of titanium dioxide particles, each of said particles having a surface;
- and
- in the range of from about 0.2% to about 2% by weight, based on the weight of said titanium dioxide particles, of an organic treating agent deposited on the surfaces of said titanium dioxide particles, wherein said organic treating agent includes at least one medium-chain triglyceride.
Dependencies are inferred from the claim text.