Hot melt magnetic sealant, method of making and method of using same
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United States of America Patent
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-
Feb 9, 1988
Grant Date -
N/A
app pub date -
Dec 29, 1986
filing date -
Dec 29, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hot melt magnetic sealant that exhibits improved adhesion to oil covered galvanized ferrometallic substrates and to epoxy electrodeposition coated ferrometallic substrates is disclosed. The sealant comprises magnetic filler particles, a hydrocarbon resin, a tackifier resin, a plasticizer, an epoxy resin and an epoxy curing agent. A method for making a hot melt sealant tape comprising mixing a formulation of magnetizable particles, a hydrocarbon resin, a tackifier resin, a plasticizer, an epoxy resin and an epoxy curing agent, extruding the mixture to form a tape and exposing the tape to an electromagnetic field is also disclosed. Methods for using the magnetic sealant tape to seal a joint between ferrometallic members having oil covered galvanized surfaces or epoxy electrodeposition coated ferrometallic members comprising disposing the tape to cover the joint and heating the tape are also disclosed.
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