Thomas C Krivak

7135429, Nov 14, 2006

May 24, 2002

10/155446

Narayan K. Raman - Monroeville PA, US
Thomas G. Krivak - Harrison City PA, US
Robert C. Dilmore - Jeannette PA, US
Paul A. Beauregard - Greensburg PA, US

PPG Industries Ohio, Inc. - Cleveland OH

B01J 21/08
B01J 21/12
B01J 21/14

502232, 502233, 502234, 502235, 502237, 502238, 502243, 502263

The present invention is directed to an attrition resistant carrier product such as silica. Further, this invention is directed to the use of a binder to improve the attrition resistance or reduce the friability of a carrier product such as silica. In an embodiment, the median particle size is from 125 to 300 microns. Selection of the binder is such that the presence and/or addition of the binder does not result in substantial modification of the physical properties of the silica. Suitable binders include Group I and Group II silicates, Group I and Group II aluminates, and mixtures thereof, as identified by the Period Table of Elements.

57470030, May 5, 1998

Mar 22, 1995

8/408327

Shantilal M. Mohnot - Murrysville PA
Harold E. Swift - Gibsonia PA
Thomas G. Krivak - Irwin PA
Robert H. Fear - Pittsburgh PA
Laura M. Randall - Pittsburgh PA
Laurence E. Jones - Pittsburgh PA

PPG Industries, Inc. - Pittsburgh PA

A61K 716
B01J 2300
C01B 3312

424 49

A statistically large population of particles of amorphous precipitated silica comprising pigmentary phase particles and glassy phase particles and having a glassy phase fraction in the range of from 0. 3 to 30 area percent is useful as an abrasive for dentifrice compositions, especially toothpaste.

59119632, Jun 15, 1999

May 12, 1995

8/439731

Thomas G. Krivak - Harrison City PA
Larry E. Jones - Pittsburgh PA

PPG Industries Ohio, Inc. - Cleveland OH

C01B 33143
C01B 3314

423335

Amorphous precipitated silica having a low proportion of small pores as evidenced by low Sears surface areas are useful as reinforcing pigments for various rubbers.

56055692, Feb 25, 1997

Nov 8, 1995

8/555552

James L. Boyer - Monroeville PA
Thomas G. Krivak - Harrison City PA
Harold E. Swift - Gibsonia PA
Robert C. Wang - Wexford PA

PPG Industries, Inc. - Pittsburgh PA

C04B 1404
C01B 3312

106482

Particles comprising particulate amorphous precipitated silica in association with from 5 to 10 percent by weight sodium sulfate and less than 10 percent by weight water, wherein the percentages are based on the weight of the silica, the sodium sulfate, and the water, which particles have a BET surface area of from 100 to 300 m. sup. 2 /g, a total intruded volume from 1. 8 to 3. 6 cm. sup. 3 /g, and a DBP oil absorption of from 180 to 320 cm. sup. 3 /100 g, may be employed in microporous battery separators to introduce all or a portion of the desired sodium sulfate to the battery electrolyte. Moreover the enhanced amount of sodium sulfate enhances silica characteristics and battery separator production.

59222980, Jul 13, 1999

Aug 8, 1997

8/909042

James L. Boyer - Monroeville PA
Thomas G. Krivak - Harrison City PA

PPG Industries Ohio, Inc. - Cleveland OH

C01B 3312

423335

Amorphous precipitated silica which may be used to form battery separators of very low shrinkage is characterized by (a) a BET surface area in the range of from 60 to 200 m. sup. 2 /g; (b) a CTAB surface area in the range of from 40 to 150 m. sup. 2 /g; (c) a DBP oil absorption in the range of from 180 to 300 cm. sup. 3 /100 g; (d) a mean ultimate particle size in the range of from 20 to 30 nm; (e) a total intruded volume in the range of from 2. 5 to 4 cm. sup. 3 /g; (f) an intruded volume in the range of from 0. 3 to 1. 2 cm. sup. 3 /g for pores having diameters in the range of from 20 to 100 nm; and (g) a pore diameter at the maximum of the volume pore size distribution function in the range of from 30 to 200 nm.

58884670, Mar 30, 1999

Oct 23, 1997

8/956504

Harold E. Swift - Gibsonia PA
Thomas G. Krivak - Harrison City PA
Laurence E. Jones - Monroeville PA

PPG Industries, Inc. - Pittsburgh PA

C01B 3312

423335

Amorphous precipitated silica is characterized by a standard white area of less than 0. 8 percent. The low standard white area is a characteristic of the silica which is indicative of high (i. e. , very effective) dispersion when the silica is incorporated into organic rubber compositions which are cured. Cured organic rubber compositions comprising amorphous precipitated silica exhibit low white areas which indicate high dispersion of the silica in the compositions.

56102216, Mar 11, 1997

Sep 26, 1995

8/533808

Walter H. Waddell - Pittsburgh PA
Larry R. Evans - Jeannette PA
Thomas G. Krivak - Irwin PA

PPG Industries, Inc. - Pittsburgh PA

C08K 300

524492

Cured tread rubber compositions of tires contain cured organic rubber, from 40 to 150 phr of reinforcing carbon black, and reinforcing reinforced amorphous precipitated silica wherein the silica has a surface area of from 160 to 340 m. sup. 2 /g and a pore diameter at the maximum of the volume pore size distribution function of from 5 to 19 nm. The presence of such reinforcing silica provides improved tire performance characteristics, especially improved paved highway performance, to tires having treads of the cured tread rubber compositions.

56059507, Feb 25, 1997

Sep 21, 1995

8/531680

Larry R. Evans - Jeannette PA
Walter H. Waddell - Pittsburgh PA
Thomas G. Krivak - Irwin PA

PPG Industries, Inc. - Pittsburgh PA

C08K 300

524492

Cured tread rubber compositions of tires contain cured organic rubber, from 0 to 20 phr of reinforcing carbon black, and from 40 to 120 phr of reinforcing reinforced amorphous precipitated silica wherein the silica has a surface area of from 160 to 340 m. sup. 2 /g and a pore diameter at the maximum of the volume pore size distribution function of from 5 to 19 nm. The presence of such reinforcing silica provides improved tire performance characteristics, especially improved paved highway performance, to tires having treads of the cured tread rubber compositions.