Patent ID: 6140279
Filing Date: 2000-10-31
Classification: C10M,C10N

Abstract:
A process for preparing an oleaginous additive concentrate comprising:a diluent oil;an unborated ashless dispersant, wherein said ashless dispersant has a hydrodynamic radius of about 8 to 40 nm;an overbased metal detergent; andat least one other concentrate additive;said process comprising the steps of:adding said at least one other concentrate additive with either of said overbased metal detergent or said ashless dispersant in said diluent oil to form a blend; andadding to said blend either said overbased detergent or said ashless dispersant which was not added in the prior step;wherein the weight ratio of said ashless dispersant to said metal detergent is about 1:1 to 8:1, the sum of said ashless dispersant and said metal detergent on an active ingredient basis is about 25 to 50 wt. % based upon the total weight of said concentrate, and blending temperature is about 600.degree. to 120.degree. C.