Ronnie L Hoskins

US Patent:

20030029358, Feb 13, 2003

Filed:

Jan 26, 2001

Appl. No.:

09/771050

Inventors:

Bruce Roberts - Norman OK, US
Jeffrey Elliott - Oklahoma City OK, US
Ronnie Hoskins - Yukon OK, US
Bruce Palmer - Edmond OK, US

International Classification:

C08K005/04
C09C001/36

US Classification:

106/499000, 106/436000

Abstract:

A process for preparing an improved pigment which is readily dispersible in paints and plastics concentrates is provided. In accordance with the process, a particulate pigment is mixed with water to form a slurry thereof, and a surface active agent is mixed with the slurry so that the pigment therein is coated therewith. A preferred surface active agent is a mixture of ethoxylated sorbitan derivatives, non-ethoxylated mono and diglycerides and ethoxylated mono and diglycerides. After the pigment has been coated with the surface active agent, the coated pigment is dried.

US Patent:

20080022900, Jan 31, 2008

Filed:

Jul 25, 2006

Appl. No.:

11/492587

Inventors:

Venkata Rama Rao Goparaju - Edmond OK, US
Ronnie Hoskins - Yukon OK, US
Darci N. Pillars - Oklahoma City OK, US

International Classification:

C09C 1/36

US Classification:

106436, 106447

Abstract:

A process is described for manufacturing a titanium dioxide pigment, comprising the steps of a) preparing an aqueous, high solids slurry by gathering materials including crude titanium dioxide from the oxidation of titanium tetrachloride, a dispersant and water and then mixing the gathered materials to form the slurry, b) diluting the aqueous, high solids slurry by adding a further amount of water to the high solids slurry with mixing, c) media-milling the resultant aqueous, lesser solids slurry, d) recovering the media-milled, crude titanium dioxide product and e) finishing the media-milled, crude titanium dioxide product to produce a finished titanium dioxide pigment product.

US Patent:

20080110373, May 15, 2008

Filed:

Nov 8, 2007

Appl. No.:

11/983345

Inventors:

Venkata Goparaju - Edmond OK, US
Ronnie Hoskins - Yukon OK, US
Darci Pillars - Moore OK, US

International Classification:

C09C 1/36

US Classification:

106437000, 106436000

Abstract:

A process is described for manufacturing a titanium dioxide pigment, comprising the steps of a) preparing an aqueous, high solids slurry by gathering materials including crude titanium dioxide from the oxidation of titanium tetrachloride, a dispersant and water and then mixing the gathered materials to form an about 50 to about 70 weight percent slurry of the crude titanium dioxide solids in water, b) diluting the aqueous, high solids slurry by adding a further amount of water to the high solids slurry with mixing, the resultant, lesser solids slurry still containing at least about 50 percent by weight of crude titanium dioxide solids, c) media-milling the resultant aqueous, lesser solids slurry, d) recovering the media-milled, crude titanium dioxide product and e) finishing the media-milled, crude titanium dioxide product to produce a finished titanium dioxide pigment product.