| abstract |
: The invention relates to an additivenmultifunctional and to a production processnof it: the additive consists of 20 ...n70% zinc dialkyl or diaryldithiophosphate havingncontents of 5 ... 20% zinc, 5 ... 40% sulfur,n5 ... 20% phosphorus, possibly up to 60%nisobutene sulfurized, and 80 ... 30% oilnrefined mineral. The process consists of dispersionnphosphorus pentasulfide in mineral oilnrefined, then dosing the mixturenalcohols, neutralize the product obtained withnzinc oxide; is purified by filtration under vacuumnpressure and ultimately the raw product itselfnmixed with isobutene sulfurized. |