| 摘要 |
PURPOSE:To obtain the a lubricating oil composition for a two cycle engine slightly generating an exhaust smoke, having excellent start of an engine, cleanability and load resistance by blending a polyoxyalkylene glycol derivative as a base oil with a specific nitrogen-containing compound and its boride. CONSTITUTION:(A) A polyoxyalkylene glycol derivative of formula I (R<1> and R<2> are each H, a 1-4C alkyl, a 6-20C aryl, an alkylaryl or an arylalkyl and either R<1> or R<2> or both are each a 6-20C aryl, an alkylaryl or an arylalkyl; R<3> to R<6> are each H, methyl or ethyl and the number of total carbon atoms of R<3> to R<6> is 1 or 2; (a) is an integer of 1-200) as a base oil is blended with (B) 0.5-30 pts.wt. based on the total amount of a composition of a nitrogen- containing compound of formula II (X and Y<1> to Y<11> are H or a 6-30C acyl derived from a fatty acid; R<7> is a 2-4C alkylene; r1 to r11 are each 0 or 1 with the proviso that one or more acyl groups are contained in one molecule) and/or its boride to give the objective lubricating oil composition for a two cycle engine. |
