Coil impregnant with modified asphaltite base
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United States of America Patent
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-
Aug 4, 1981
Issued Date -
N/A
app pub date -
Oct 18, 1976
filing date -
Sep 17, 1975
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A modified gilsonite based coil impregnant having improved sound suppression properties and rheologically controlled characteristics. In one form of the preferred embodiment, the gilsonite is modified by thermal depolymerization. In another form of the preferred embodiment, the gilsonite is modified by the addition of a process oil having a viscosity gravity constant of 0.97 and a viscosity in SSU at 100.degree. C. of 48.4 and comprising 29-36% by weight of the oil-gilsonite composition. To approximately 75-80% of modified gilsonite is added about 20-25% by weight of ethylenediamine bisstearamide to produce a mixture having a softening point of from 125.degree.-130.degree. C. and a viscosity at 170.degree. C. of from 78 to 118 centipoise.
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