Robert W Christie

US Patent:

6455158, Sep 24, 2002

Filed:

Jun 16, 2000

Appl. No.:

09/596113

Inventors:

Henry L. Mei - New City NY
Louis M. Panzer - Ridgefield CT
Herbert E. Petty - Bethel CT
Philbert E. Ramdatt - New York NY
Robert E. Christie - North Salem NY
Juan Alfonso - Hopewell Jct. NY

Assignee:

Crompton Corporation - Middlebury CT

International Classification:

B32B 1502

US Classification:

428403, 428404, 428405, 428407, 523212, 524265, 524267, 524269

Abstract:

The present invention relates to the silanization or surface treatment of minerals with alkylsilanes and alkylsilane copolymers. More specifically, the present invention relates to alkylsilane copolymers useful for surface treating pigments or fillers. The alkylsilane copolymers comprise at least two different monomers. The copolymers find particular utility for the surface treatment of white pigments, such as titanium dioxide, for improving the dispersibility and processibility of the pigments when compounded with a polymeric material, in particular, when compounded with polyolefins.

US Patent:

6894089, May 17, 2005

Filed:

Sep 9, 2003

Appl. No.:

10/658576

Inventors:

Henry L. Mei - New City NY, US
Louis M. Panzer - Ridgefield CT, US
Eric R. Pohl - Mount Kisco NY, US
Robert E. Christie - North Salem NY, US
Philbert E. Ramdatt - New York NY, US

Assignee:

General Electric Company - Pittsfield MA

International Classification:

C08K009/06
C08K003/22

US Classification:

523212, 523231, 524431, 524837

Abstract:

The present invention is directed to a composition comprising a white pigment or extended white pigment surface treated with a silane having at least one functional group capable of reacting with acids and anhydrides, at least one polymeric material and a compatibilizer. Once treated, the pigment has improved processability and dispersibility in polymeric materials. Silanizing the pigment also enhances the brightness (increase whiteness and reduce yellowness) of the pigment.

US Patent:

20030027897, Feb 6, 2003

Filed:

Apr 26, 2001

Appl. No.:

09/843603

Inventors:

Henry Mei - New City NY, US
Louis Panzer - Ridgefield CT, US
Eric Pohl - Mount Kisco NY, US
Robert Christie - North Salem NY, US
Philbert Ramdatt - New York NY, US

International Classification:

C08K003/34
C08K005/24
C08K009/00

US Classification:

523/216000, 524/261000, 524/445000

Abstract:

The present invention is directed to a composition comprising a white pigment or extended white pigment surface treated with a silane having at least one functional group capable of reacting with acids and anhydrides, at least one polymeric material and a compatibilizer. Once treated, the pigment has improved processability and dispersibility in polymeric materials. Silanizing the pigment also enhances the brightness (increase whiteness and reduce yellowness) of the pigment.