Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1979-02-08
1980-10-07
Nielsen, Earl A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528104, 528111, 528407, 525507, 156330, C08G 5950, C08G 5964
Patent
active
042269695
ABSTRACT:
A threadlocking composition for mating threaded fasteners utilizes an epoxy resin system with a component adapted to effect dispersion of lubricants or other organic films on the mating threaded surfaces to thereby improve the threadlocking capabilities thereof without requiring pretreatment. The threadlocking composition comprises an epoxy resin, an amine hardener therefor and 1-25 percent of an aminoalcohol compound which is soluble in the resin/hardener system and wherein the amine and hydroxyl groups are disposed on a carbon chain and on different carbon atoms of that chain. In using the composition, it is placed upon the threads of at least one of the cooperating members which are then assembled and allowed to remain so assembled to produce curing of the epoxy composition. Pretreatment of the fastener surfaces is not required. At the end of three hours, this results in an increase in the torque required for disassembly to a level equal to at least 75 percent of the torque required for assembly. However, the epoxy composition remains substantially free from bonding to the threaded members so as to permit the disassembly when required. Further increases in disassembly torque result from further curing.
REFERENCES:
patent: 2907748 (1959-10-01), Lieb
patent: 3059697 (1962-10-01), Pitts
Bruins, "Epoxy Resin Technology," Interscience, 1968, New York, pp. 74, 75, 115, 116, & 117.
Eichner Mary A.
Watson, Jr. Charles R.
Allied Products Corporation
Nielsen Earl A.
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