Preparation of Phosphorus - Containing Antiwear Composition for Use in Lubricant Compositions
AssigneeThe Lubrizol Corporation
InventorsDaniel J. Knapton, William R.S. Barton, David J. Aaserud
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Abstract
A process is provided for preparing a salt of a hydroxy-substituted di-ester of phosphoric acid, comprising: (a) reacting a phosphating agent with a monohydric alcohol and with an alkylene polyol, wherein the mole ratio of monohydric alcohol:alkylene polyol is about 0.2:0.8 to about 0.8:0.2 and wherein an excess of the phosphating agent is employed such that the product mixture formed thereby contains phosphorus acid functionality; and (b) reacting the product mixture of step (a) with an amine. The product is useful as an antiwear agent.
Claims23
A process for preparing a salt of a hydroxy-substituted diester of phosphoric acid, comprising:
- (a) reacting a phosphating agent comprising phosphorus pentoxide with a monohydric alcohol having about 4 to about 20 carbon atoms and with an alkylene diol, wherein the mole ratio of monohydric alcohol:alkylene diol is about 0.2:0.8 to about 0.8:0.2, whereby the product mixture formed thereby contains phosphorus acid functionality;
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- (b) reacting the product mixture of step (a) with an amine comprising at least one alkyl primary amine or at least one alkyl secondary amine.
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A composition comprising an alkyl primary amine salt or an alkyl secondary amine salt of a phosphorus-containing composition which comprises at least some molecules represented by the formulas
- where R is an alkyl group having about 4 to about 20 carbon atoms, each Q is independently hydrogen or an alkyl group of 1 to about 6 carbon atoms, and each X is independently R, or H, or a —R′OH group where R′ is an alkylene group of 2 to 6 carbon atoms, provided that at least one X is H, further provided that said composition is substantially free from species containing a dimeric or oligomeric moiety derived from the dimerization of oligomerization of an alkylene oxide.
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Dependencies are inferred from the claim text.