US4404828A
Expired / Lapsed
US
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Method of drawing a metal wire and lubricant composition therefor
Assignee: HL Blachford Ltd
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Filing: 1980-08-01
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Granted: 1983-09-20
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Expires: 2000-08-01
Abstract
Abstract A lubricant composition for drawing metal wire comprises a lubricant which may be particulate, liquid or semi-liquid and discrete microcapsules having a liquid core, which enhances the wire drawing agent; in particular the liquid core may be an extreme pressure additive or an anti-wear additive; the liquid is released by rupture of the microcapsules in the die so that the liquid is released at the site where it is required.
Inventors
- 👤 John Blachford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:10
CPC Classifications
C; C10; C10M; C10M177/00; F; F16; F16N; F16N15/00; C10M2201/00; C10M2201/02; C10M2201/08; C10M2201/082; C10M2201/083; C10M2201/087; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/282; C10M2207/34; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2211/00; C10M2211/02; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/043; C10M2223/045; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/14; C10N2010/16; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
39 words
A lubricant composition for use in a wire drawing operation, comprising a wire drawing particulate lubricant intimately admixed with an additive comprising a microencapsulated liquid, said liquid being a load carrying additive effective to enhance the wire drawing operation.
Claim 2
Dependent Claim
39 words
A lubricant composition for use in a wire drawing operation, comprising a wire drawing particulate lubricant intimately admixed with an additive comprising a microencapsulated liquid, said liquid being a load carrying additive effective to enhance the wire drawing operation.
Claim 3
Dependent Claim
32 words
A composition according to claim 1, in which said microencapsulated liquid comprises discrete pressure rupturable microcapsules in a concentration of 0.01 to 10%, by weight, based on the weight of the lubricant.
Claim 4
Dependent Claim
77 words
A composition according to claim 2, wherein said liquid is selected from the group consisting of metal dialkyldithiophosphates, in which the alkyl groups, which may be the same or different, are straight chain or branched groups of 1 to 6 carbon atoms, which decompose at elevated temperatures up to about 250° C.; triaryl phosphates in which the aryl groups, which may be the same or different are unsubstituted or substituted phenyl groups; chlorinated oils and mixtures thereof.
Claim 5
Dependent Claim
47 words
A composition according to claim 2, wherein said liquid is selected from the group consisting of zinc dialkyldithiophosphate, in which each alkyl group, which may be the same or different, straight or branched, has 4 to 6 carbon atoms, tricresyl phosphate, chlorinated mineral oils, and mixtures thereof.
Claim 6
Dependent Claim
81 words
A composition according to claim 2, wherein said microcapsules are substantially spherical having a diameter of 1 to 200 microns, the liquid being encapsulated in a microcapsule shell having a thickness of 0.01 to 50 microns, the shell comprising a non-atmospherically-degradable polymeric material, impermeable to the liquid and having a smooth, slippery outer surface, having a high resistance to abrasion by the particulate lubricant, and being rupturable when subjected to pressure exerted at the die-wire interface during the wire drawing operation.
Claim 7
Dependent Claim
20 words
A composition according to claim 5, wherein said load carrying additive comprises 50 to 90%, by weight, of the microcapsules.
Claim 8
Dependent Claim
24 words
A composition according to claim 2, wherein said liquid is selected from the group consisting of extreme pressure additives, anti-wear additives, and mixtures thereof.
Claim 9
Dependent Claim
21 words
A composition according to claim 2, wherein said liquid comprises a mixture of zinc dihexyldithiophosphate, tricresyl phosphate and chlorinated mineral oil.
Claim 10
Dependent Claim
19 words
A composition according to claim 1, wherein said liquid is effective to reduce wear at a wire drawing die.
Claim 11
Independent Claim
81 words
A method of drawing a metal wire comprising feeding a metal wire through a lubricant composition comprising a particulate lubricant and discrete pressure rupturable microcapsules having a liquid core, to form a coating of the composition on the wire, drawing the coated wire through a die effective to reduce the diameter of the wire, and allowing the microcapsules to rupture to release said liquid at the die, said liquid being a load carrying additive effective to enhance the wire drawing operation.
Claim 12
Independent Claim
81 words
A method of drawing a metal wire comprising feeding a metal wire through a lubricant composition comprising a particulate lubricant and discrete pressure rupturable microcapsules having a liquid core, to form a coating of the composition on the wire, drawing the coated wire through a die effective to reduce the diameter of the wire, and allowing the microcapsules to rupture to release said liquid at the die, said liquid being a load carrying additive effective to enhance the wire drawing operation.
Claim 13
Dependent Claim
24 words
A method according to claim 1, wherein said liquid is selected from the group consisting of extreme pressure additives, anti-wear additives, and mixtures thereof.
Claim 14
Dependent Claim
32 words
A method according to claim 10, in which said microencapsulated liquid comprises discrete pressure rupturable microcapsules in a concentration of 0.01 to 10%, by weight, based on the weight of the lubricant.
Claim 15
Dependent Claim
77 words
A method according to claim 12, wherein said liquid is selected from the group consisting of metal dialkyldithiophosphates, in which the alkyl groups, which may be the same or different, are straight chain or branched groups of 1 to 6 carbon atoms, which decompose at elevated temperatures up to about 250° C., triaryl phosphates in which the aryl groups, which may be the same or different, are unsubstituted or substituted phenyl groups, chlorinated oils and mixtures thereof.
Claim 16
Dependent Claim
20 words
A method according to claim 12, wherein said load carrying additive comprises 50 to 90%, by weight, of the microcapsules.
Claim 17
Dependent Claim
48 words
A method according to claim 12, wherein said liqiuid core is selected from the group consisting of zinc dialkyldithiophosphate in which each alkyl which may be the same or different, straight or branched chain, contains 4 to 6 carbon atoms, tricresyl phosphate, chlorinated mineral oils and mixtures thereof.
Claim 18
Dependent Claim
81 words
A method according to claim 10, wherein said capsules are substantially spherical having a diameter of 1 to 200 microns, the liquid being encapsulated in a microcapsule shell having a thickness of 0.01 to 50 microns, the shell comprising a non-atmospherically-degradable polymeric material, impermeable to the liquid and having a smooth, slippery outer surface, having a high resistance to abrasion by the particulate lubricant, and being rupturable when subjected to pressure exerted at the die-wire interface during the wire drawing operation.
Claim 19
Dependent Claim
19 words
A method according to claim 16, wherein said liquid is effective to reduce wear at the wire drawing die.
Claim 20
Dependent Claim
18 words
A method according to claim 10, wherein said liquid is effective to enhance lubrication at the die-wire interface.
Claim 21
Dependent Claim
17 words
A method according to claim 10, wherein said liquid is effective to reduce wear at the die.
Claim 22
Dependent Claim
18 words
A method according to claim 10, wherein said liquid is effective to reduce dust generation subsequent to drawing.
Claim 23
Dependent Claim
21 words
A method according to claim 10, wherein said liquid comprises a mixture of zinc dihexyldithiophosphate, tricresyl phosphate and chlorinated mineral oil.
Claim 24
Dependent Claim
51 words
A method according to claim 10, wherein said microcapsules are substantially spherical having a diameter of 1 to 200 microns and said liquid comprises 50 to 90%, by weight, of the microcapsules, the liquid being selected from the group consisting of zinc dihexyldithiophosphate, tricresyl phosphate, chlorinated mineral oils and mixtures thereof.
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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |