Oil additive concentrates and lubricants of enhanced performance capabilities
AssigneeEthyl Petroleum Additives, Inc.
InventorGregory S. Conary
Life of this patent
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Abstract
Haze formation in additive concentrates containing boron-containing ashless dispersants is inhibited, and improvements in performance capabilities can be realized, by suitably controlling the pH of the concentrate as produced. Not only does such pH control result in no sacrifice in wear and corrosion inhibition, but it has been found possible by suitable adjustment and control of pH to actually improve the effectiveness of the concentrate in its ability to inhibit wear and corrosion. Moreover, such pH control makes possible the provision of compositions having enhanced extreme pressure properties as seen in the standard L-42 test, and improved antirust performance as seen in the standard L-33 test.
Claims48
In the formation of an additive concentrate comprising (i) at least one oil-soluble, acidic organic additive selected from the group consisting of (a) one or more hydrocarbyl phosphoric acids, (b) one or more carboxylic acids, and (c) a combination of (a) and (b), and (ii) at least one oil-soluble ashless boronated dispersant, and wherein said additive concentrate would have a pH below 6, the improvement which comprises including in said concentrate one or more oil-soluble amines in an amount such that the pH of the finished concentrate as formed falls in the range of about 6.0 to about 7.0, and introducing the boronated dispersant into the concentrate when the pH of the concentrate being formed is at least about 6.0, each said pH being determined in accordance with the method described in the specification hereof.
In an additive concentrate comprising at least one oil-soluble amine salt of a dihydrocarbyl monothiophosphoric acid, at least one oil-soluble active-sulfur-containing antiwear or extreme pressure agent, and a complement of oil-soluble acidic organic additives at least one of which is a hydrocarbyl phosphoric acid such that said additive concentrate would have a pH below 6, the improvement wherein said concentrate contains a sufficient amount of oil-soluble primary amine to provide a concentrate having a pH in the range of about 6.0 to about 7.0, the determination of the aforesaid pH values being in accordance with the method described in the specification hereof.
An ashless additive concentrate formed from at least the following:
- (a) at least one oil-soluble sulfur-containing antiwear and/or extreme pressure agent, (b) at least one oil-soluble phosphorus-containing antiwear and/or extreme pressure agent, (c) at least one oil-soluble acidic organic additive, (d) at least one oil-soluble amine, and (e) at least one oil-soluble boronated ashless dispersant;
- said concentrate being further characterized in that (i) in the absence of component (d) the pH of the concentrate is 6.0 or below, (ii) component (d) is employed in an amount sufficient to cause the pH of the concentrate to be in the range of about 6.0 to about 7.0, and (iii) component (e) is introduced into the concentrate when the pH thereof is at least about 6.0, the determination of the aforesaid pH values being in accordance with the method described in the specification hereof.
In the method of forming an additive concentrate from a plurality of oil-soluble components which include at least one acidic organic component and at least one boronated ashless dispersant by blending the components of the concentrate concurrently or sequentially and individually or in one or more subcombinations such that said additive concentrate would have a pH below 6, the improvement which comprises (a) including as at least one component in such blending operation a sufficient amount of oil-soluble amine to adjust the pH of the concentrate to at lest 6.0, and (b) blending such one or more boronated ashless dispersants into the concentrate such that at no point in the blending is such at least one boronated ashless dispersant exposed to a pH below 6.0, the determination of the aforesaid pH values being in accordance with the method described in the specification hereof.
In an additive concentrate comprising at least one oil-soluble amine salt of a dihydrocarbyl monothiophosphoric acid, at least one oil-soluble active-sulfur-containing antiwear or extreme pressure agent, and a complement of oil-soluble acidic organic additives at least one of which is carboxylic acid, and wherein said additive concentrate would have a pH below 6, the improvement wherein said concentrate contains a sufficient amount of oil-soluble primary amine to provide a concentrate having a pH in the range of about 6.0 to about 7.0, the determination of the aforesaid pH values being in accordance with the method described in the specification hereof.
In the formation of an additive concentrate comprising (i) at least one oil-soluble, carboxylic acid organic additive and (ii) at least one oil-soluble ashless boronated dispersant, and wherein said additive concentrate would have a pH below 6, the improvement which comprises including in said concentrate one or more oil-soluble amines in an amount such that the pH of the finished concentrate as formed falls in the range of 6.0 to about 7.0, and introducing the boronated dispersant into the concentrate when the pH of the concentrate being formed is at least 6.0, each said pH being determined in accordance with the method described in the Specification hereof.
In an additive concentrate comprising at least one oil-soluble amine salt of a dihydrocarbyl monothiophosphoric acid, at least one oil-soluble active-sulfur-containing antiwear or extreme pressure agent, and a complement of oil-soluble acid organic additives at least one of which is a carboxylic acid such that said additive concentrate would have a pH below 6, the improvement wherein said concentrate contains a sufficient amount of oil-soluble primary amine to provide a concentrate having a pH in the range of 6.0 to about 7.0,the determination of the aforesaid pH values being in accordance with the method described in the Specification hereof.
A concentrate as claimed in claim 43 wherein said complement of oil-soluble acidic organic additives additionally comprises (a) at least one aliphatic monocarboxylic acid, (b) at least one aliphatic polycarboxylic acid, or (c) a combination of (a) and (b).
Dependencies are inferred from the claim text.