Locking compound for locking fasteners in place

Compositions: coating or plastic – Coating or plastic compositions – Inorganic materials only containing at least one metal atom

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Details

106 84, 10628717, 10628734, C09D 100, C09D 102

Patent

active

046682970

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 72.3% to 77.7% by weight of a first mixture of inorganic polysilicates. Preferably, the first mixture of inorganic polysilicates is substantially 51.7% AlSiO.sub.3, 34.1% [NaSiO.sub.3 ] Na.sub.2 SiO.sub.3, and 13.2% MgSiO.sub.3, all on a weight [bases] basis. Added to the first mixture is 2.3% to 2.7% 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 [bases] basis. Added to the first and second mixtures is 20% to 25% by weight H.sub.2 O. When used in an oxygen rich environment, 0.2% to 0.3% by weight of an inorganic pigment of a green color is added. The compound when mixed has a 45 minute pot life and cures at room temperature in four to six hours.

REFERENCES:
patent: 3069277 (1962-12-01), Teja
patent: 3873334 (1975-05-01), Lee et al.
Advanced Inorganic Chemistry, Cotton F. A., p. 321, 1972.
Chem. Abstract, vol. 84: 110,638f.

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