| 摘要 |
PURPOSE:To enable the use under high-temperature and high-shear conditions, by compounding specific diamide-dureas(DADU) as thickening agents, thereby improving heat resistance and mechanical stability. CONSTITUTION:The title lubricant compsn. is prepd. by compounding 25-50wt.% of DADU compds. of the formula R1CONHR2NHCONHR3NHCONHR4NHCOR5 (wherein R1, R5 are 1-22C aliphatic, alicyclic or aromatic hydrocarbon radicals; R2, R4 are 1-8C aliphatic, alicyclic or aromatic hydrocarbon radicals; R3 is an aliphatic, alicyclic or aromatic hydrocarbon radical) with base oils (pref. ester base oils or base oils wherein not less than 1/3 is ester oils). The DADU compd. is obtd. by polyaddition reaction of, e.g., 2mol of N-(4-aminophenyl) acetamide with 1mol of diphenylmethane-4,4'-diisocyanate. |
