John M Kirkpatrick

US Patent:

41982240, Apr 15, 1980

Filed:

Aug 16, 1978

Appl. No.:

5/934186

Inventors:

John D. Kirkpatrick - Trafford PA

Assignee:

Pittsburgh Corning Corporation - Pittsburgh PA

International Classification:

C03B 1908

US Classification:

65 22

Abstract:

Where a formulated glass cullet is utilized as a portion of the pulverulent batch material, the cellular material is prepared by first grinding the glass cullet in a ball mill with a cellulating agent such as carbon black until the pulverulent material attains an average particle size of about 4 or 5 microns. The pulverulent batch containing the glass cullet and cellulating agent is then sintered at a sintering temperature for a sufficient period of time to permit the glass cullet material to soften and coalesce and increase in density without, however, cellulating the glass batch. The sintering process is then interrupted and the sintered material may be cooled and crushed to a size that passes through a United States 10 mesh screen. The crushed and screened sintered material is then positioned in a suitable mold and subjected to a cellulating temperature of between about 1600. degree. F. (870. degree. C. ) and 1650. degree. F. (899. degree. C.

US Patent:

40563995, Nov 1, 1977

Filed:

May 6, 1976

Appl. No.:

5/683754

Inventors:

John Kirkpatrick - Trafford PA
John Kijowski - Bradford PA

Assignee:

Pittsburgh Corning Corporation - Pittsburgh PA

International Classification:

C04B 3514

US Classification:

106 69

Abstract:

A mortar composition for use in bonding cellular glass bodies includes a mixture, as expressed by percentage weight, of finely powdered reactive glass, such as cellular glass powder, in the range of between about 26 to 48 percent, inert aggregate filler in the range of between about 26 and 61 percent, and a silica sol binder in the range of between about 13 and 26 percent. The cellular glass powder has substantially the same composition as the cellular glass bodies being bonded. The inert aggregate filler preferably comprises round grained silica sand having a particle size wherein substantially all of the particles pass through a U. S. Standard #35 Screen and coarse cellular glass particles wherein substantially all the particles pass through a U. S. Standard #35 Screen. The ratio of finely powdered reactive glass to sol binder is maintained between about 1.