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US 5,264,005 AGranted
Two-cycle lubricants and methods of using the same
AssigneeThe Lubrizol Corporation
InventorGlen H. Blythe
Life of this patent
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Abstract
This invention relates to a two-cycle engine lubricant composition, comprising (A) at least one dispersant, (B) at least one reaction product of a fatty acid and a polyamine, and (C) at least about 25% by weight of the composition of at least one varnish dissolver selected from (a) keto-alcohols, (b) carboxylic esters having up to a total of 24 carbon atoms and (c) alkoxy alcohols, and (D) at least about 15% by weight of the composition of at least one fluidizing oil, and a method, comprising the steps of introducing into a two-cycle internal combustion engine a fuel-lubricant mixture comprising a major amount of a fuel and a minor amount sufficient to increase compression or release stuck piston rings, of the two-cycle engine lubricant composition.
Claims55
A method, comprising the steps of:
- introducing into a two-cycle internal combustion engine a fuel-lubricant mixture comprising a major amount of a fuel and a minor amount sufficient to increase compression of release stuck piston rings, of a lubricant composition comprising
- (A) from about 5% up to about 30% by weight of at least one dispersant,
- (B) from about 2% up to about 15% by weight of at least one reaction product of a fatty acid and a polyamine, further treated with an alkylene oxide,
- (C) from about 5% up to about 80% by weight of at least one varnish dissolver selected from (a) keto-alcohols, (b) carboxylic esters having up to a total of 24 carbon atoms, and (c) alkoxy alcohols, and
- (D) from about 15% up to about 70% by weight of at least one fluidizing oil.
2 more elements
A method, comprising the steps of:
- introducing into a two-cycle internal combustion engine a fuel-lubricant mixture comprising a major amount of a fuel and from about 0.2 to about 6 ounces per gallon of a composition comprising
- (A-1) from about 5% up to about 30% by weight of at least one aminophenol represented by the formula:
- ##STR13## wherein R is a hydrocarbyl group having an average of about 30 to about 400 aliphatic carbon atoms;
- R' is selected from the group consisting of lower alkyl, lower alkoxy, nitro, and halo;
- and z is 0 or 1;
- (B) from about 2% up to about 15% by weight of at least one reaction product of a fatty acid and a polyamine, further treated with an alkylene oxide;
- (C) from about 5% up to about 80% by weight of at least one varnish dissolver selected from (a) keto-alcohols, (b) carboxylic esters having up to a total of 24 carbon atoms, and (c) alkoxy alcohols, and
- (D) from about 15% up to about 70% by weight of the composition of at least one fluidizing oil.
5 more elements
A two-cycle engine lubricant composition, comprising
- (A) from about 5% up to about 30% by weight of at least one dispersant,
- (B) from about 2% up to about 15% by weight of the reaction product of a fatty acid and a polyamine, further treated with an alkylene oxide,
- (C) from about 5% up to about 80% by weight of at least one varnish dissolver selected from (a) keto-alcohols, (b) carboxylic esters having up to a total of 24 carbon atoms, and (c) alkoxy alcohols, and
- (D) from about 15% up to about 70% by weight of at least one fluidizing oil.
1 more element
A method, comprising the steps of:
- introducing into a two-cycle internal combustion engine a fuel-lubricant mixture comprising a major amount of a fuel and a minor amount sufficient to increase compression or release stuck piston rings, of a lubricant composition comprising
- (A) from about 5% up to about 30% by weight of at least one dispersant,
- (B) from about 2% up to about 15% by weight of at least one reaction product of a fatty acid and a polyamine,
- (C) from about 5% up to about 80% by weight of at least one varnish dissolver selected from (a) keto-alcohols selected from the group consisting of hydroxyacetone, diacetone alcohol, hydroxymethylpentanone and hydroxymethylbutanone, and (c) alkoxy alcohols selected from the group consisting of ethoxyethanol, ethoxypropanol, butoxyethanol and butoxypropanol, and
- (D) from about 15% up to about 70% by weight of at least one fluidizing oil.
2 more elements
A method, comprising the steps of:
- introducing into a two-cycle internal combustion engine a fuel-lubricant mixture comprising a major amount of a fuel and from about 0.2 to about 6 ounces per gallon of a composition comprising
- (A-1) from about 5% up to about 30% by weight of at least one aminophenol represented by the formula:
- ##STR16## wherein R is a hydrocarbyl group having an average of about 30 to about 400 aliphatic carbon atoms;
- R' is selected from the group consisting of lower alkyl, lower alkoxy, nitro, and halo;
- and z is 0 or 1;
- (B) from about 2% up to about 15% by weight of at least one reaction product of a fatty acid and a polyamine;
- and
- (C) from about 5% up to about 80% by weight of at least one varnish dissolver selected from (a) keto-alcohols, selected from the group consisting of hydroxyacetone, diacetone alcohol, hydroxymethylpentanone and hydroxymethylbutanone, and (c) alkoxy alcohols selected from the group consisting of ethoxyethanol, ethoxypropanol, butoxyethanol and butoxypropanol, and
- (D) from about 15% up to about 70% by weight of the composition of at least one fluidizing oil.
6 more elements
A two-cycle engine lubricant composition, comprising
- (A) from about 5% up to about 30% by weight of at least one dispersant,
- (B) from about 2% up to about 15% by weight of the reaction product of a fatty acid and a polyamine, and
- (C) from about 5% up to about 80% by weight of at least one varnish dissolver selected from (a) keto-alcohols selected from the group consisting of hydroxyacetone, diacetone alcohol, hydroxymethylpentanone and hydroxymethylbutanone, and (c) alkoxy alcohols selected from the group consisting of ethoxyethanol, ethoxypropanol, butoxyethanol and butoxypropanol, and
- (D) from about 15% up to about 70% by weight of at least one fluidizing oil.
1 more element
Dependencies are inferred from the claim text.