Preparation of lithium-calcium grease compositions

Details Preparation of lithium-calcium grease compositions Preparation of lithium-calcium grease compositions

1990-03-23

1991-05-14

Howard, Jacqueline V.

Compositions

Electrolytes for electrical devices

252 17, C10M11702

Patent

active

050154036

ABSTRACT:
A process for the preparation of a lubricating grease which comprises (a) dispersing in a major amount of a lubricating oil at about 180.degree. F. to about 200.degree. F. an effective amount of a saponifiable fatty material and lithium base to neutralize the fatty material, (b) then heating the resulting mixture from (a) to about 385.degree. F. to about 410.degree. F. at about ambient pressure to dissolve said fatty material, (c) homogenizing the resulting mixture from (b) at about 80 to about 200 psi while maintaining the temperature, (d) cooling the resulting mixture to a temperature below about 370.degree. F., (e) adding calcium base to the resulting mixture to saponify the remaining (unsaponified) fatty material at about 290.degree. F. to about 360.degree. F. and about ambient pressure, and (f) homogenizing the resulting mixture at about 100 to about 150 psi while maintaining the temperature to obtain a lubricating grease composition. Preferably, the calcium bae in step (e) is substantially dry and is added at a temperature of from about 310.degree. F. to about 360.degree. F.

REFERENCES:
patent: 2641577 (1953-06-01), O'Halloran
patent: 2704363 (1955-03-01), Armstrong
patent: 2888402 (1959-05-01), Nelson
patent: 2908645 (1959-10-01), Morway
patent: 2929780 (1960-03-01), O'Halloran
patent: 2929781 (1960-03-01), Beerbower et al.
patent: 2959548 (1960-11-01), O'Halloran et al.
patent: 3891564 (1975-06-01), Carley et al.

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