Urea-urethane grease composition

Details Urea-urethane grease composition Urea-urethane grease composition

1989-03-23

1990-04-10

Dixon, Jr., William R.

Compositions

Electrolytes for electrical devices

252 515A, C10M11508

Patent

active

049158600

ABSTRACT:
A urea-urethane grease composition contains, as essential ingredients, a thickener and a lubricant base oil. The thickener contains a urea-urethane mixture having a composition including 20 to 99, mol. % of a diurea compound represented by the general formula (I) of ##STR1## 4 to 30 mol. % of a urea-urethane compound represented by the general formula (II) of ##STR2## and 1 to 50 mol. % of a diurethane compound represented by the general formula (III) of ##STR3## wherein R.sub.1 represents a difunctional aromatic hydrocarbon residue having 6 to 15 carbon atoms, R.sub.2 a cyclohexyl group or a group derived from cyclohexyl and having 7 to 12 carbon atoms and R.sub.3 an alkyl group or an alkenyl group having 8 to 20 carbon atoms. The ratio of the numbers of amino groups R.sub.2 --NH-- to those of alkoxy groups R.sub.3 --O-- in the mixture being 95/5 to 40/60. The thickener is contained in an amount of 2 to 25 wt. % based on the total weight of the grease composition.

REFERENCES:
patent: 2710840 (1955-06-01), Swakon et al.
patent: 3096285 (1963-07-01), Huttenlocher et al.
patent: 3689413 (1972-09-01), Loeffler
patent: 4065395 (1977-12-01), Bailey
patent: 4102797 (1978-07-01), Schadenberg
patent: 4115284 (1978-09-01), Kinoshita et al.

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