Patent ID: 9133414
Filing Date: 2015-09-15
Classification: C10M,C10N

Abstract:
1. A lubricating composition comprising: (a) from 60 to 90% by weight of one or more base oils, of mineral, synthetic or natural origin, comprising: (b) at least one anti-wear and extreme pressure phosphorus or sulfur-phosphorus additive selected from the group consisting of alkyl phosphates, alkyl phosphonate, thiophosphoric acid, thiophosphorus acid, esters of these acids, their salts and alkyl dithiophosphates, (c) from 0.1 to 2% by weight of at least one anti-wear and extreme pressure sulfur-containing additive selected from one or more sulfurized olefins fitting the general formula R1-S the ratio of the elementary sulfur mass content, as measured according to the ASTM D2622 standard, to the elementary phosphorus mass content, as measured according to the ASTM D5185 standard (S/P) in the lubricating composition is between 25 and 35; the ratio of the active sulfur mass content at 150° C., as measured according to the ASTM D1662 standard, to the elementary sulfur mass content, as measured according to the ASTM D5185 standard (S the total of sulfur-phosphorus, phosphorus and sulfur-containing additives is between 10% and30% by weight in the lubricating composition.