| 摘要 |
Sulphur-contg. reaction prods. of a mixt. of (I) >=1 olefin of formula cis-R1-CR2=CR3-R4, (in which R1 and R2 are 1-10C alkyl; R3 and R4 are H or 1-10C alkyl), and >=1 unsat. fatty acid ester and/or cpd. (II) of formula R5-CH=CH-R6, (in which R5 and R6 are 1-10C alkyl substd. with >=1 phophate ester gps. or their salts), with sulphur, to give molar ratio f (II) to (I) in the prod. of 0.2-3.7. Used as additives to lubricants. The raw materials are readily available (in contrast to sperm oil), no dark red prods. contg. 1,2-thiol 3-thiones are obtd. as arise from sulphurisn. of iso-olefines alone, and he prods. show a reduced tendency to sludge formation, with better results by the 4-ball wear test. |
