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US 6,165,950 AGranted
Phosphate lubricant compositions and metal forming use
AssigneePABU Services, Inc.
InventorsArvind M. Rao, Douglas G. Placek
Life of this patent
Estimating the term…
Abstract
Concentrated lubricant compositions, dilutable for use in high temperature metal forming processes and containing a triaryl phosphate ester; a non-ionic and/or amphoteric surfactant, an organic sulfur-containing extreme pressure additive, an amine salt of an organic acid, and, optionally, sodium thiosulfate, exhibit improved performance in forming operations and produce parts with less part to part variation.
Claims25
A concentrated lubricant composition for metal forming, the composition comprising:
- (a) about 1% to about 50% by weight of at least one triaryl phosphate ester;
- (b) about 5% to about 35% by weight of a non-ionic surfactant, an amphoteric surfactant or a mixture thereof;
- (c) about 2% to about 15% by weight of an organic sulfur-containing extreme pressure additive that reduces the force required for the forming process;
- (d) an amine salt selected from the group consisting of amine salts of carboxylic acids, amine salts of polyacrylic acids, and amine salts of partially neutralized esters of phosphoric acid and ethoxylated alcohols;
- and
- (e) sodium thiosulfate;
- in which:
- the ratio of triaryl phosphate esters to amine salts is about 0.50:1 to about 10:1, and wherein said composition is an emulsion that has a room temperature shelf life of at least 20 days.
5 more elements
A diluted lubricant composition for metal forming, the composition comprising:
- (a) about 0.01% to about 5% by weight of a mixture of alkylated triaryl phosphate esters comprising from 1.0% to 20.0% by weight of tri(butylphenyl) phosphate;
- from 10.0% to 50.0% by weight of di(butylphenyl)monophenyl phosphate;
- from 15% to 60% by weight of mono(butylphenyl)diphenyl phosphate and less than 5.0% by weight of triphenyl phosphate;
- (b) about 0.05% to about 3.5% by weight of a non-ionic surfactant, an amphoteric surfactant or a mixture thereof;
- (c) about 0.02% to about 1.5% by weight of an organic sulfur-containing extreme pressure additive that reduces the force required for the forming process;
- and
- (d) an amine salt selected from the group consisting of amine salts of carboxylic acids, amine salts of polyacrylic acids, and amine salts of partially neutralized esters of phosphoric acid and ethoxylated alcohols;
- in which:
- the ratio of alkylated triaryl phosphate esters to amine salts is about 0.50:1 to about 10:1.
6 more elements
A method for forming metal, the method comprising:
- (1) contacting a working surface of a die with a diluted lubricant composition;
- (2) forming a metal workpiece preheated to at least 800.degree. C. in the die preheated to at least 250.degree. C. to form a formed workpiece;
- and
- (3) removing the formed workpiece from the die;
- in which the diluted lubricant composition comprises:
- (a) about 0.01% to about 5% by weight of at least one alkylated triaryl phosphate ester;
- (b) about 0.05% to about 3.5% by weight of at least one non-ionic surfactant selected from the group consisting of:
- ethoxylated alkyl phenols containing at least six moles of ethylene oxide per mole of alkyl phenol and ethoxylated castor oil;
- (c) about 0.02% to about 1.5% by weight of an organic sulfur-containing extreme pressure additive selected from the group consisting of:
- sulfurized olefins, phosphinothio(thio)propanoic acid alkyl esters, phosphorthionate esters, and alkylated phenyl phosphorthionates, said extreme pressure additives reducing the force required for the forming process;
- and
- (d) an amine salt selected from the group consisting of:
- amine salts of aliphatic mono- and poly-carboxylic acids comprising at least 6 carbon atoms, amine salts of aromatic mono- and poly-carboxylic acids comprising at least 6 carbon atoms, amine salts of polyacrylic acids crosslinked with polyalkenyl polyether, and amine salts of ethoxylated phosphoric acids;
- in which the ratio of alkylated triaryl phosphate esters to amine salts is about 0.50:1 to about 10:1.
11 more elements
Dependencies are inferred from the claim text.