US3966619A
Expired / Lapsed
US
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Lubricants for cold working of aluminium
Assignee: Alcan Research and Development Ltd
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Filing: 1975-10-28
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Granted: 1976-06-29
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Expires: 1995-10-28
Abstract
Abstract A lubricant for working aluminium comprising essentially an aqueous solution of A. a secondary alkylamine, in which at least one of the alkyl groups includes a chain of at least 8 carbon atoms, the secondary alkylamine including a carboxylic acid group as a substituent at a carbon atom not more than 3 atoms distant from the amino group and B. an acid phosphate mono- or di- ester of a polyalkylene oxide surface active agent, Said alkylamine and said acid phosphate ester each having a solubility of at least 1/2% by weight in water and said solution including at least 1/2% by weight of said alkylamine and said acid phosphate ester.
Inventors
- 👤 Gordon Frederick Smith
- 👤 Michael Keith Budd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:21
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; C10M2201/00; C10M2201/02; C10M2209/00; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/24; C10M2215/26; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/043; C10M2225/00; C10M2225/02; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/20; C10N2040/22; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
A lubricant for working aluminium comprising essentially an aqueous solution of a. a secondary alkylamine, in which at least one of the alkyl groups includes a chain of at least 8 carbon atoms, the secondary alkylamine including a carboxylic acid group as a substituent at a carbon atom not more than 3 atoms distant from the amino group and b. an acid phosphate mono- or di-ester of a polyalkylene oxide surface active agent, said alkylamine and said acid phosphate ester each having a solubility of at least 1/2% by weight in water and said solution including at least 1/2% by weight of said alkylamine and said acid phosphate ester.
Claim 2
Dependent Claim
109 words
A lubricant for working aluminium comprising essentially an aqueous solution of a. a secondary alkylamine, in which at least one of the alkyl groups includes a chain of at least 8 carbon atoms, the secondary alkylamine including a carboxylic acid group as a substituent at a carbon atom not more than 3 atoms distant from the amino group and b. an acid phosphate mono- or di-ester of a polyalkylene oxide surface active agent, said alkylamine and said acid phosphate ester each having a solubility of at least 1/2% by weight in water and said solution including at least 1/2% by weight of said alkylamine and said acid phosphate ester.
Claim 3
Dependent Claim
49 words
A lubricant according to claim 1, in which the secondary alkylamine is an amino-acid of the general formula R 1 --NN -- R 2 COOH wherein R 1 is an alkyl group containing at least 8 carbon atoms and R 2 is an alkyl group containing 1-5 carbon atoms.
Claim 4
Dependent Claim
26 words
A lubricant according to claim 2 in which R 1 is an alkyl group containing one or more hydroxyl groups and/or one or more alkoxy groups.
Claim 5
Dependent Claim
13 words
A lubricant according to claim 2 in which the amino-acid is a N-alkyl-β-amino-acid.
Claim 6
Dependent Claim
19 words
A lubricant according to claim 4 in which the amino-acid is N-lauryl-β-amino-butyric acid, N-lauryl-β-amino-propionic acid or N-decyl-β-amino butyric acid.
Claim 7
Dependent Claim
55 words
A lubricant according to claim 2 in which the ester radical of the acid phosphate mono- or di-ester is in the form R 3 --O(CH 2 CH 2 O) n --, R 3 being an alkyl, aryl, aralkyl, alkaryl, alkenyl, alkenaryl, aralkenyl, acyl, aroyl, aralkoyl, alkanoyl, alkenoyl, alkenaroyl or aralkenoyl group and n is 5-250.
Claim 8
Dependent Claim
22 words
A lubricant according to claim 6 in which R 3 is a nonylphenyl group or a lauryl group and n is 5-30.
Claim 9
Dependent Claim
14 words
A lubricant according to claim 7 further characterised in that n is about 9.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |