Ernest A Cavicchio

US Patent:

43175759, Mar 2, 1982

Filed:

Jun 16, 1980

Appl. No.:

6/160145

Inventors:

Ernest A. Cavicchio - Erie PA

Assignee:

GAF Corporation - New York NY

International Classification:

F16J 1510
C08L 100

US Classification:

277227

Abstract:

An asbestos-free gasket is produced from a composition which comprises from about 5% to about 20% of an organic latex binder, from about 5% to about 35% of a cellulosic fibrous material, from about 0% to about 30% of mineral wool, at least about 50% of an inorganic filler, and from about 0 to about 5% of a coloring additive. The percentages being on a dry weight basis of the gasket. The organic materials are present in an amount no greater than 40% of the total dry weight of the gasket and preferably no greater than 30%. The inorganic filler is an inactive additive, stable at a temperature greater than 1700. degree. F. , such as Portland Cement, diatomaceous earth, silicates, carbonates, barytes and mixtures thereof. Preferably the inorganic filler is a mixture of barytes and talc in a ratio of from about 1 to 0, to 3 to 1.

US Patent:

43080707, Dec 29, 1981

Filed:

Jun 26, 1980

Appl. No.:

6/163259

Inventors:

Ernest A. Cavicchio - Erie PA

Assignee:

GAF Corporation - New York NY

International Classification:

C04B 7353

US Classification:

106 93

Abstract:

An asbestos-free millboard formulation is provided which includes from about 5 to 20% of a cellulosic fiber, from 40 to 15% barytes, from 10 to 50% cement and from 15 to 40% of an inorganic filler selected from the group consisting of talc, diatomaceous earth, silicates, carbonates and mixtures thereof. The formulation can be processed on conventional millboard manufacturing equipment.