| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a new compound which can have an excellent preventing effect on deposits on engines, especially on inlet valves, when used as a fuel additive in fuel compositions. SOLUTION: A compound of formula I [R1 is a polyalkyl having an average mol.wt. of about 500 to 5,000; R2 is an about 2 to 6C alkylene; R3 is H or CH3; (x) is about 0 to 4], for example, a compound of formula II. The compound of formula I can be produced, for example, by a method comprising reacting (A) a polyalkenylsuccinic acid anhydride of formula III R4 is a polyalkenyl [derived from a polyolefin which is the (co)polymer of a mono-olefin, especially a 1-mono-olefin, such as ethylene, propylene or butylene]} with (B) (i) ammonia, (ii) ammonium hydroxide, (iii) methylamine or (iv) a polyamine, preferably ethylene diamine, at about 80 to 200 deg.C, and then reducing the obtained polyalkenylsuccinimde of formula IV.</p> |
