Amorphous Precipitated Silica Having A Low Proportion Of Small Pores
US Patent:
5911963, Jun 15, 1999
Filed:
May 12, 1995
Appl. No.:
8/439731
Inventors:
Thomas G. Krivak - Harrison City PA Larry E. Jones - Pittsburgh PA
Assignee:
PPG Industries Ohio, Inc. - Cleveland OH
International Classification:
C01B 33143, C01B 3314
US Classification:
423335
Abstract:
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.