Abstract:
The present invention discloses superior fuel and lubricant additives prepared by the acylation of alkyl or alkenyl succinimides with the polyether half-esters of dicarboxylic acids. The polyether half-esters of dicarboxylic acids are grafted onto the polyamine moiety of alkyl or alkenyl succinimides by reacting the succinimide and the half-ester of the dicarboxylic acid under amidation conditions to form an amide group with an amino group of the polyamine. The process is carried out by first reacting a monofunctional polyalkylene ether with a dicarboxylic acid to produce a half-ester of the dicarboxylic acid. This product is then reacted with an alkyl or alkenyl succinimide polyamine ashless dispersant to product a multifunctional hydrocarbon fuel or lubricant additive that exhibits augmented dispersant properties.
Abstract:
Reaction products in which polyethers are connected to hydroxyalkylated polyamines using diisocyanates have been found to be effective ashless dispersants and detergents for various lubricants and fuels.
Abstract:
Reaction products in which polyethers are grown from substituted phenol-containing mannich bases have been found to be effective ashless dispersants and detergents for fuels and lubricants.
Abstract:
Additives comprising the reaction products of aminodiols and the products of benzophenone tetracarboxylic dianhydride and aminoalcohols and/or amines with long-chain hydrocarbyl groups attached improve the low-temperature properties of distillate fuels.
Abstract:
Disclosed herein is the reaction product of 5-amino-2-mercapto-1,3,4-thiadiazole with hydrocarbyl epoxides. The resulting reaction product finds use as an additive in lubricating oil compositions.
Abstract:
Reaction products of sulfurized olefins, e.g., isobutylene with a dialkyl hydrogen phosphite and an alkyl primary amine provide antiwear characteristics and improved retention of copper corrosion protection for lubricant compositions when incorporated therein.
Abstract:
Additives which improve the low-temperature properties of distillate fuels are the oligomeric/polymeric reaction products of aromatic anhydrides and epoxides (or their corresponding acid/diol equivalents), with optional termonomers.
Abstract:
Additives which improve the low-temperature properties of distillate fuels are the polymeric and/or oligomeric monomers selected from ester/urethane reaction products of a combination of anhydrides and epoxides (or their corresponding acid/diol equivalents), and a urethane precursor and optionally with various suitable reactive materials to provide optional termonomers.
Abstract:
Dialky and trialky phosphites are reacted with sulfur. The resulting product is the desired lubricant additive which is mixed with suitable lubricating oils.