Accession Number:

AD0656191

Title:

SOME RECENT STUDIES OF ELECTRICAL GRADE FILLERS IN BUTYL RUBBER AND OTHER INSULATION MATERIALS,

Descriptive Note:

Corporate Author:

ENJAY LABS LINDEN N J

Personal Author(s):

• Fischer,W. F.

Report Date:

1967-01-01

Pagination or Media Count:

39.0

Abstract:

Talc imparts a smooth surface to extruded articles, increases resistance to flow of uncured compounds, and may be of use in nonelectric molded and proofed goods where resistance to permeation by gases or liquids is desired. Promotion of the filler with a chemical agent like Elastopar improves uncured properties and increases cured modulus 20-30 per cent. Overall processing and physical property data on platy talc compounds detailed in the paper show no significant deficiencies in comparisons with calcined clay, calcium carbonate and other types of talc fillers in butyl rubber. A one-step mixing procedure for butyl-platy talc compounds is described. Comparisons of dielectric strength of platy talc with other fillers in polyethylene, polypropylene and polyvinyl chloride plastics indicate the platy talc sustains the high dielectric strength of the plastics at 1800-2000 volts per mil. Nonplaty mineral fillers tend to decrease resistance to electrical failure. Author

Descriptors:

• *BUTYL RUBBER
• *TALC
• *ADDITIVES
• *ELECTRICAL INSULATION
• CLAY MINERALS
• DIELECTRIC PROPERTIES
• PHYSICAL PROPERTIES
• POLYETHYLENE PLASTICS
• POLYVINYL CHLORIDE

Subject Categories:

• Geology, Geochemistry and Mineralogy
• Miscellaneous Materials
• Elastomers and Rubber

Distribution Statement:

APPROVED FOR PUBLIC RELEASE