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US 11,274,261 B2Granted
Lubricant additives for metal working
AssigneeLamberti SPA
InventorsAlessandro D'Aloia, Dario Fornara, Gabriele Greco, Alessandro Lugari, Giovanni Floridi, Giuseppe Li Bassi
Life of this patent
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Abstract
Method for increasing lubrication in metal working processes by the use of phosphate esters of propoxylated and ethoxylated alcohols.
Claims10
A method for increasing lubrication in metal working processes comprising the step of adding to a metal working fluid one or more phosphate esters of formula I:
- wherein R is the residue of one or more linear or branched C12-C18 aliphatic alcohols and at least 70% by weight of said aliphatic alcohols is made up of one or more linear or branched C14-C16 aliphatic alcohols;
- x is the average number of propoxy groups and ranges from 3 to 6.5;
- y is the average number of ethoxy groups and ranges from 3 to 8;
- R1 is hydrogen, an alkali metal, an ammonium ion, a protonated amine, a quaternary organic ammonium or an alkaline earth metal;
- R2 is like R1 or is a radical of formula:
- wherein R, x and y have the same meaning as reported above, and wherein R1 and R2 are not both hydrogen.
3 more elements
Dependencies are inferred from the claim text.