Ashless dispersants formed from substituted acylating agents...

C - Chemistry – Metallurgy – 07 – D

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C07D 207/412 (2006.01) C07D 401/14 (2006.01) C07D 403/14 (2006.01) C07D 405/14 (2006.01) C08F 8/32 (2006.01) C08F 8/46 (2006.01) C10L 1/22 (2006.01) C10M 133/16 (2006.01) C10M 133/52 (2006.01) C10M 137/10 (2006.01) C10M 141/08 (2006.01) C10M 141/10 (2006.01) C10M 163/00 (2006.01)

Patent

CA 2083547

Succinic ester-amides are formed by (A) reacting (i) at least one substantially aliphatic polymer of at least one lower olefin, and (ii) an acidic reactant or a mixture of two or more acidic reactants represented by the general formula R-CO-CH=CH-CO-R' wherein R and R' are independently -OH, -o-lower alkyl, a halogen atom, or taken together are a single oxygen atom; the process being characterized in that: a) the substantially aliphatic polymer is comprised predomi- nantly or entirely of polyisobutene, at least 50% of the polyisobutene content of such polymer having an end group represented by the formula (see formula I) b) the mole ratio of said acidic reactant(s): said poly- mer(s) is at least 1 : 1; c) the reaction mixture is maintained under superatmospheric pressure during at least a substantial portion of the re- action period; and d) said acylating agent is characterized by having an average total tar rating as determined by the method described in the specification hereof that is at least 25% lower than the average total tar rating of a corres- ponding product made in the same way under the same reaction conditions using a polyisobutene containing up to 10% of the above-depicted end group; and (B) reacting such acylating agent with at least one alcohol (pre- ferably a polyhydric alcohol) and amine (preferably a polyamine having at least one primary amino group). Combinations of succinimides, succinic esters, and succinic ester-amides formed using such acylating agents are used in combination with other additives in forming lubricant compositions.

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