CN1262315A - Lubricating greate for non-binding prestressed reinforcing bars - Google Patents
Lubricating greate for non-binding prestressed reinforcing bars Download PDFInfo
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- CN1262315A CN1262315A CN 99100355 CN99100355A CN1262315A CN 1262315 A CN1262315 A CN 1262315A CN 99100355 CN99100355 CN 99100355 CN 99100355 A CN99100355 A CN 99100355A CN 1262315 A CN1262315 A CN 1262315A
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Abstract
A lubricating grease for non-binding prestressed reinforcing bar contains basic oil (100 wt. portions), soap-based thickening agent (1-15), C20-50 ceresine (1-8), anti-oxidizing agent (0.1-2) and mineral oil, and features higher water-proof nature and long service life of prestressed reinforcing bar. The antirusting agent and inorganic calcium salt may also be used in it for higher anticorrosion, antirust and antiwear performance.
Description
The invention belongs to lubricant, exactly is a kind of lubricating grease that is used for the building trade no-cohesive prestressed reinforcement.
Non-cohesive Prestressing Force Technology is the advanced technology of building trade, originates from the fifties, and the eighties is greatly developed.The anticorrosion problem of no-cohesive prestressed reinforcement is to influence the prestressing without bondn building key factor in work-ing life, so anticorrosion, the antirust and extreme pressure and antiwear behavior of no-cohesive prestressed reinforcement lubricating grease is most important.At present, commercially available anticorrosion fat generally is made up of mineral oil, fatty acid lithium basis soap, sulfonated petro-leum and amine antioxidants, after this lubricating grease used through eight, nine years, just become dry, the oxidation stability variation, it is big that acid number becomes, and therefore can not satisfy the long-life service requirements of no-cohesive prestressed reinforcement.
Foreign literature JP03119097 report is made viscosifying agent with polyureas, preparation no-cohesive prestressed reinforcement lubricating grease, but, do not see extensive application because of cost is too high.
The object of the present invention is to provide a kind of with low costly, can satisfy the lubricating grease of no-cohesive prestressed reinforcement service requirements.
Lubricating grease provided by the invention has following composition, is benchmark with base oil weight, and soap base viscosifying agent content is 1～15 heavy %; The ground wax content of carbon number 20～50 is 1～8 heavy %; Antioxidant content is 0.1～2 heavy %; Surplus is a mineral oil.
Wherein the soap base viscosifying agent can be lithium basis soap or lithium calcium basis soap etc., as 12-oxystearic acid lithium soap, and lipid acid lithium soap or hydroxy fatty acid lithium calcium soap, preferred stearic acid or lipid acid lithium soap.The consumption of viscosifying agent is 1～15 heavy % of base oil weight, preferred 5～12 heavy %.
Described cereous carbonatoms is 20～50, and is preferred 30～45, as No. 70 and No. 80 ceresine.Cereous effect is the anti-water permeate that strengthens lubricating grease, thereby improves the antiseptic and rustproof ability of lubricating grease.Cereous content is 1～8 heavy % of base oil weight, preferred 3～6 heavy %.
Described oxidation inhibitor is the general oxidation inhibitor in this area, can be amine type oxidation inhibitor or phenol type antioxidant, also can be the mixture of amine type or phenol type.Wherein phenol type antioxidant mainly comprises 2,6-di-t-butyl-4-cresols, 2,4-dimethyl-6 tert-butyl phenol, 2,6-di-tert-butylphenol and tertiary butyl mixed phenol etc.Amine type oxidation inhibitor mainly is pentanoic and to di-iso-octyldiphenylamine.Preferred amines type oxidation inhibitor.The consumption of oxidation inhibitor is 0.1～2 heavy % of base oil weight, preferred 0.2～0.6 heavy %.
Described base oil is a mineral oil, paraffin base mineral oil preferably, and 100 ℃ of viscosity are 1～15mm
2/ S.
In the lubricating grease provided by the invention, can also add rust-preventive agent with its rustless property of further raising.Said rust-preventive agent can be sulfonated petro-leum, nonyl naphthalene barium sulfonate, alkenyl succinic acid or petroleum oxidate wax barium soap etc.The consumption of rust-preventive agent can be 0.5～5 heavy % of base oil weight, preferred 1～3 heavy %.
Can also add inorganic calcium salt in the lubricating grease provided by the invention,, overcome no-cohesive prestressed reinforcement in the life-time service process, because the etching problem that fretting wear causes to strengthen its extreme pressure and antiwear behavior.Described inorganic calcium salt is selected from lime carbonate, calcium phosphate, secondary calcium phosphate, monocalcium phosphate or lime borate, also can be to be selected from the wherein mixture of two or more material arbitrary proportion, preferred lime carbonate, calcium phosphate, secondary calcium phosphate and monocalcium phosphate, most preferably lime carbonate.The consumption of inorganic calcium salt is 1～10 heavy % of base oil weight, preferred 5～8 heavy %.
Lubricating grease provided by the invention prepares according to a conventional method, promptly earlier viscosifying agent, part base oil are mixed, be warming up to 70～90 ℃, add alkaline solution and carry out saponification reaction, be warming up to 190～210 ℃ again and stop heating, add the surplus base oil, add various additives in the temperature-fall period, stirring gets final product.
Owing to added ceresine, the rustless property of lubricating grease is significantly improved in the lubricating grease provided by the invention, satisfied long-life service requirements of no-cohesive prestressed reinforcement with anti-water permeate.For example, adopt lubricating grease of the present invention after, the salt fog cabinet test-results rises to the B level from the D level of common fat, the humidity cabinet test result rises to 0 grade from 1 grade of common fat.
If add rust-preventive agent in lubricating grease provided by the invention, then antiseptic and rustproof performance further improves, and salt-fog test can reach the A level.If add inorganic calcium salt again, then extreme pressure and antiwear behavior can improve greatly, P
BValue can increase 500～800N, and fraze can reduce 0.15～0.4mm.
The invention will be further described below by embodiment.Example 1
227 gram 500SN mineral oil and 40 gram 12-oxystearic acids are mixed in cup, be warming up to 85 ℃, add lithium hydroxide aqueous solution and carry out saponification, dehydration, be warming up to 200 ℃, stop heating, add 113 gram mineral oil, be cooled to 100 ℃, adding 10 gram carbon numbers are 30～38 No. 75 ceresine (Jingmen refinery product), pentanoic 0.8 gram, stir evenly the back and grind three times, obtain the lubricating grease sample.Physicochemical property sees Table 1.Example 2
227 gram 650SN mineral oil and 30 gram 12-oxystearic acids are mixed in cup, be warming up to 85 ℃, add lithium hydroxide aqueous solution and carry out saponification, dehydration, be warming up to 200 ℃, stop heating, add 113 gram mineral oil, be cooled to 100 ℃, the adding carbon number is 35～45 No. 80 ceresine (Jingmen refinery product) 18 grams, to di-iso-octyldiphenylamine 1.7 grams, calcium carbonate powders 27.2 grams stir evenly the back and grind three times, obtain the lubricating grease sample.Physicochemical property sees Table 1.Example 3
227 gram 500SN mineral oil and 25 gram stearic acid are mixed in cup, be warming up to 85 ℃, add lithium hydroxide aqueous solution and calcium hydroxide emulsion and carry out saponification, dehydration, be warming up to 200 ℃, stop heating, add 113 gram mineral oil, be cooled to 100 ℃, add barium mahogany sulfonate 3.4 grams, No. 80 ceresine 20.4 grams, 2,6-di-tert-butylphenol 0.68 gram, calcium phosphate 17 grams stir evenly the back and grind three times, obtain the lubricating grease sample.Physicochemical property sees Table 1.Example 4
227 gram 500SN mineral oil and 40 gram 12-oxystearic acids are mixed in cup, be warming up to 85 ℃, add lithium hydroxide aqueous solution and carry out saponification, dehydration, be warming up to 200 ℃, stop heating, add 113 gram mineral oil, be cooled to 100 ℃, add nonyl naphthalene barium sulfonate 10.2 grams, No. 75 ceresine 20 grams, each 13.6 gram of lime carbonate and secondary calcium phosphate, pentanoic 0.68 gram, 2,6-di-t-butyl-4-cresols 1.02 grams, stir evenly the back and grind three times, obtain the lubricating grease sample.Physicochemical property sees Table 1.Comparative Examples
The anti-corrosion grease of this Comparative Examples for making according to conventional formulation.
227 gram 500SN mineral oil and 40 gram 12-oxystearic acids are mixed in cup, be warming up to 85 ℃, add lithium hydroxide aqueous solution and carry out saponification, dehydration, be warming up to 200 ℃, stop heating, add 113 gram mineral oil, be cooled to 100 ℃, add barium mahogany sulfonate 10.2 grams, pentanoic 1.7 grams, stir evenly the back and grind three times, obtain the lubricating grease sample.Physicochemical property sees Table 1.
As can be seen from Table 1, lubricating grease provided by the invention has good antiseptic property, if add rust-preventive agent in lubricating grease provided by the invention, then antiseptic and rustproof performance can further improve; If add inorganic calcium salt again, then extreme pressure and antiwear behavior can improve greatly.Table 1
| Lubricating grease | Example 1 | Example 2 | Example 3 | Example 4 | Comparative Examples | Building standard JG3007-93 | Test method |
| Cone penetration, 1/10mm | 312 | ?318 | ?321 | ?297 | ?299 | 296～325 | ?GB/T?269 |
| Dropping point, ℃ | 191 | ?182 | ?175 | ?190 | ?181 | ≮160 | ?GB/T?4929 |
| Moisture, % | Do not have | Do not have | Do not have | Do not have | Do not have | ≯0.1 | ?GB/T?512 |
| The Stencil oil-dividing amount (100 ℃, 24h), % | 2.9?? | ?2.6 | ?2.5 | ?3.0 | ?3.2 | ≯8.0 | ?SH/T?0324 |
| Corrosion (the 45# steel disc, 100 ℃, 24h) | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | ?SH/T?0331 |
| Steam output (99 ℃, 22h), % | 0.61 | ?0.32 | ?0.47 | ?0.37 | ?0.53 | ≯2.0 | ?GB/T?7325 |
| Low-temperature performance (40 ℃, 30min) | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | The SH0387 appendix |
| Humid heat test (the 45# steel disc, 30d), level | 0 | ?0 | ?0 | ?0 | ?1 | ≯1 | ?GB/T?2361 |
| Salt-fog test (the 45# steel disc, 30d), level | B | ?B | ?A | ?A | ?D | ≯B | ?GB/T?0081 |
| Oxidation stability pressure fall (99 ℃, 100h), Mpa | 0.017 | ?0.014 | ?0.021 | ?0.011 | ?0.015 | ≯0.147 | ?SH/T?0325 |
| Extreme pressure property (four balls) PB, N PD, N ZMZ, N | ? 320 1600 230 | ? ?1200 ?4500 ?600 | ? ?735 ?2600 ?400 | ? ?882 ?4300 ?580 | ? ?320 ?1600 ?240 | ? -- -- -- | ? ?SH/T?0202 |
| Abrasion resistance (four balls) d, mm | 0.68 | ?0.38 | ?0.48 | ?0.32 | ?0.66 | -- | ?SH/T?0204 |
Claims (10)
1. a lubricating grease that is used for no-cohesive prestressed reinforcement is characterized in that having following composition, is benchmark with base oil weight, and soap base viscosifying agent content is 1～15 heavy %; The ground wax content of carbon number 20～50 is 1～8 heavy %; Antioxidant content is 0.1～2 heavy %; Surplus is a mineral oil.
2. according to the described lubricating grease of claim 1, it is characterized in that the soap base viscosifying agent is selected from lithium basis soap or lithium calcium basis soap.
3. according to claim 1 or 2 described lubricating grease, it is characterized in that the soap base viscosifying agent is selected from 12-oxystearic acid lithium soap, lipid acid lithium soap or hydroxy fatty acid lithium calcium soap.
4. according to the described lubricating grease of claim 1, the consumption that it is characterized in that the soap base viscosifying agent is 5～12 heavy % of base oil weight.
5. according to the described lubricating grease of claim 1, it is characterized in that described cereous carbonatoms is 30～45.
6. according to the described lubricating grease of claim 1, it is characterized in that cereous consumption is 3～6 heavy % of base oil weight.
7. according to the described lubricating grease of claim 1, the consumption that it is characterized in that oxidation inhibitor is 0.2～0.6 heavy % of base oil weight.
8. according to the described lubricating grease of claim 1, it is characterized in that also containing inorganic calcium salt, consumption is 1～10 heavy % of base oil weight.
9. according to the described lubricating grease of claim 8, it is characterized in that described inorganic calcium salt is selected from lime carbonate, calcium phosphate, secondary calcium phosphate or monocalcium phosphate, or the mixture of two or more material wherein, consumption is 5～8 heavy % of base oil weight.
10. according to the described lubricating grease of claim 1, it is characterized in that also containing and be selected from sulfonated petro-leum, nonyl naphthalene barium sulfonate, the rust-preventive agent of alkenyl succinic acid or petroleum oxidate wax barium soap, the consumption of rust-preventive agent can be 0.5～5 heavy % of base oil weight
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99100355A CN1086197C (en) | 1999-01-25 | 1999-01-25 | Lubricating greate for non-binding prestressed reinforcing bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99100355A CN1086197C (en) | 1999-01-25 | 1999-01-25 | Lubricating greate for non-binding prestressed reinforcing bars |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1262315A true CN1262315A (en) | 2000-08-09 |
| CN1086197C CN1086197C (en) | 2002-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99100355A Expired - Lifetime CN1086197C (en) | 1999-01-25 | 1999-01-25 | Lubricating greate for non-binding prestressed reinforcing bars |
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|---|---|
| CN (1) | CN1086197C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847376B (en) * | 2006-05-10 | 2010-05-12 | 王宇远 | Antiwear and antirust grease for chain and its preparation process |
| CN101955839A (en) * | 2010-10-13 | 2011-01-26 | 中国石油化工股份有限公司 | Lithium-based lubricating grease composition with low friction coefficient and preparation method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2942287B2 (en) * | 1989-10-02 | 1999-08-30 | 住友電気工業株式会社 | Anti-corrosive lubricant for unbonded PC steel strands |
| CN1100750A (en) * | 1993-09-21 | 1995-03-29 | 宝山钢铁(集团)公司 | Lubricating powder used for thermoplastic processing of metals |
| EP0690121A3 (en) * | 1994-06-27 | 1996-07-31 | Carrier Corp | Metal forming lubricant |
| JP3119097B2 (en) * | 1994-10-25 | 2000-12-18 | 国産電機株式会社 | Capacitor discharge type internal combustion engine ignition device |
-
1999
- 1999-01-25 CN CN99100355A patent/CN1086197C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847376B (en) * | 2006-05-10 | 2010-05-12 | 王宇远 | Antiwear and antirust grease for chain and its preparation process |
| CN101955839A (en) * | 2010-10-13 | 2011-01-26 | 中国石油化工股份有限公司 | Lithium-based lubricating grease composition with low friction coefficient and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1086197C (en) | 2002-06-12 |
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