The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 1990
Filed:
Mar. 23, 1989
Nippon Oil Co., Ltd., Tokyo, JP;
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.