Hot melt magnetic sealant, method of making and method of using

Details Hot melt magnetic sealant, method of making and method of using Hot melt magnetic sealant, method of making and method of using

1986-12-29

1988-02-09

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523437, 523438, 264174, 26421112, C08K 318, C08L 6300

Patent

active

047242434

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.

REFERENCES:
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patent: 3987122 (1976-10-01), Bartz et al.
patent: 4133796 (1979-01-01), Bullman
patent: 4427481 (1984-01-01), Smith et al.
patent: 4576726 (1986-03-01), Watanabe et al.

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