Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1987-03-19
1988-01-26
Morris, Theodore
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
1062865, C04B 1400, C09D 100
Patent
active
047215283
ABSTRACT:
The invention is a compound for locking a fastener in place after it has been torqued and also for providing an indication that it has remained properly torqued. The compound includes 72.5% to 77.5% by weight of a first mixture of substantially 18.3% Al.sub.2 O.sub.3, 29.5% Al.sub.2 SiO.sub.3 and 41.4% Na.sub.2 SiO.sub.3 particles on a weight basis. Added to the first mixture is 1.3% to 1.7% by weight of a second mixture of substantially 80% Al.sub.2 O.sub.3 fiber and 20% SiO.sub.2 particles, all on a weight basis. A third constituent is 0.4% to 0.6% by weight of a third mixture of substantially 88% Zr.sub.2 O.sub.3 and 12% Y.sub.2 O.sub.3 powder. Finally, the fourth constitutent is 20% to 23% by weight H.sub.2 O. When used in an oxygen-rich environment, 0.2% to 0.4% by weight of an inorganic pigment of a green color is addded. When the constituents are mixed into a paste, the compound has a one-hour pot life and cures at room temperature in three to four hours. This time can be considerably decreased by raising the temperature. For example, the compound will cure in one to two minutes if heated to 600.degree. to 625.degree. F. by use of a heat gun.
REFERENCES:
patent: 3069277 (1962-12-01), Teja
patent: 3873334 (1975-03-01), Lee et al.
Chem Abst., vol. 84: 110638f.
Dachs Louis L.
Lockheed Corporation
Morris Theodore
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