| abstract |
1,162,436. Lubricants; fuels. OROBIS Ltd. 8 March, 1968 [18 March, 1967], No. 12815/67. Headings C5F and C5G. [Also in Division C3] Lubricant and fuel compositions comprise as detergent additive the reaction product of a compound having one of the formulµ with a compound having one of the formulµ where n and m are 0 or integers, R is hydrogen or alkyl, and R<SP>1</SP> and R<SP>2</SP> are substantially aliphatic hydrocarbon radicals in which either R<SP>1</SP> or R<SP>2</SP> has a chain length of less than 50 carbon atoms and the arithmetic mean of the chain lengths of R<SP>1</SP> and R<SP>2</SP> is greater than 50. The hydrocarbon chains may be derived from polyethylene, polypropylene or polybutylene, and the additives may be prepared by reacting a polyalkenyl succinic acid or anhydride with an alkylene polyamine, e,g. ethylene diamine, propylene diamines, diethylene triamine, triethylene tetramine, tetraethylene pentamine, tripropylene tetramines and octaethylene non- amine, and further reacting the product with a polyalkenyl succinic acid or anhydride. Convention additives may be present and an example describes a composition of a mineral lubricating oil, calcium phenate, zinc dialkyl dithiophosphate and the product obtained by reacting a 47 C polyisobutenyl succinic anhydride with tetraethylene pentamine and reacting the product with 78 C polyisobutenyl succinic anhydride. |