Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1982-04-05
1983-11-01
Gallagher, John J.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
1563315, 4284735, 526262, 528322, 528367, 528423, C09J 502
Patent
active
044128843
ABSTRACT:
A moisture resistant polyimide adhesive is disclosed comprising a polymer having repeating units of the formula: ##STR1## where n is equal to about 8 to about 20. The improved moisture resistance of the polymers according to the present invention is indicated by a moisture pick-up of less than about 0.6% by weight after 24 hour immersion in room temperature water. The polymer also exhibits a tensile strength greater than about 1800 psi (1.24.times.10.sup.7 NT/M.sup.2). In addition to their improved adhesive and moisture resistant properties, the polymers according to the present invention exhibited such properties with cure times of less than about one hour at temperatures up to about 320.degree. C.
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Gallagher John J.
Gwinnell Harry J.
United Technologies Corporation
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