(19)
(11) EP 0 100 665 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.03.1984 Bulletin 1984/13

(43) Date of publication A2:
15.02.1984 Bulletin 1984/07

(21) Application number: 83304397

(22) Date of filing: 29.07.1983
(84) Designated Contracting States:
DE FR GB

(30) Priority: 30.07.1982 US 403607

(71) Applicant: CHEVRON RESEARCH COMPANY
 ()

(72) Inventor:
  • Campbell, Curtis B.
     ()

   


(54) Deposit control additives for hydrocarbon fuels and lubricants for use in internal combustion engines


(57) Additives for use in internal combustion engines are provided which particularly in unleaded fuels maintain cleanliness of the intake system without contributing to combustion chamber deposits. The additives are hydrocarbyl-terminated poly(oxyalkylene) polyamine ethanes comprising a hydrocarbyl-terminated poly(oxyalkylene) chain formed from 1 to 30 2-5 carbon oxyalkylene units bonded to an ethane or branched ethane chain containing from 2 to 8 carbon atoms in turn bonded to a nitrogen atom of a polyamine having from 2 to 12 amine nitrogens and from 2 to 40 carbon atoms with a carbon:nitrogen ratio between 1:1 and 10:1. The terminal hydrocarbyl group contains from 1 to 30 carbon atoms and the additive has a molecular weight in the range from 300 to 2500. The additive may be formulated as a concentrate in an inert oleophilic organic solvent or may be formulated as a lubricant composition for use in an internal combustion engine by incorporation in a lubricating oil.





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