Patent ID: 9469825
Filing Date: 2016-10-18
CPC Classification: C10M,C10N,F16H

Claim Text:
1. A transmission lubricant composition comprising: a major amount of a lubricating oil; 4.5 to 23 weight percent of a boronated and phosphorylated N-substituted polyisobutylene succinimide dispersant having a number average molecular weight of the polyisobutylene substituent greater than 1300 to 2300 as determined by gel permeation chromatography using polystyrene as the reference and a viscosity of the polyisobutylene at 100° C. of 2100 to 2700 cSt, a ratio of boron to phosphorus of 0.21 to 0.46, and a ratio of boron to nitrogen of 0.09 to 0.19, and an amount of boron to provide 58 to 371 ppm boron to the transmission lubricant composition; and a metal containing detergent providing metal at greater than 0 ppm and up to 281 ppm to the transmission lubricant composition and delivering a soap content of 0.02 to 0.15 weight percent to the transmission lubricant composition.