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Accession Number:
AD0656272
Title:
BUTYL POLYMER COMPOUNDING FOR INSULATIONS,
Corporate Author:
SOUTHERN CLAYS INC NEW YORK
Report Date:
1954-01-01
Abstract:
High temperature mixing aids not only in a very high degree of dispersion, but gives dense well cured stocks. High temperature mixes extrude smoothly. In Butyl stocks you can make or destroy electrical properties in your internal mixer. It is not so much to consider what you put into the compound, as to how you put your materials together. This is an old, old basic philosophy in insulation compounding, but in the system just discussed the best possible dispersion obtainable is a must. We know of no rapid method of incorporating the Quinones or Red Lead so that uniform cures and stable electrical results can be obtained. This is the reason we use master batches of these materials. The Quinone - Red Lead system is extremely sensitive to variations in pH. The usual antioxidant type of amines retard the cures in open steam. This is the main reason we use FT Black, pH 8.5 or FF Black, pH 9.3. This type of high pH Black, while a mild retarder to prevent scorch, is more advantageous for CV cures than the amines. The use of sulfur with the Quinones seems to aid and smooth the cure in open steam, but in the GMF system it raises the water absorption with resultant progressive degradation of insulation resistance values. This does not apparently happen with DiBenzo GMF - Red Lead system. Author
Supplementary Note:
Annual Wire and Cable Symposium (3rd), Asbury Park, N. J., December 7,8,9, 1954.
Pages:
0013
File Size:
0.00MB
