Urea grease composition and preparation method thereof

A urea-based grease and grease technology, applied in the field of grease, can solve the problems of harsh lubrication conditions and impurity intrusion, and achieve the effects of good oxidation resistance, not easy to coke, and improving comprehensive performance.

Active Publication Date: 2009-02-18
杭州得润宝油脂股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the lubricating grease used in these mechanical equipment is in a rough environment, that is, high temperature, contact with water, there may be some impurities such as iron scale intrusion, and it will work continuously under harsh conditions day and night, so the lubrication conditions are harsh.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of the present invention is:

[0026] 1. Add diisocyanate to 50%-70% base oil of grease base oil by weight, and dissolve at 70-80°C;

[0027] 2. Add long-chain aliphatic amine to the base oil accounting for 20-40% by weight of grease base oil and dissolve it at 70-80°C, then add naphthenic amine and stir evenly;

[0028] 3. Mix and react the above two groups of solutions, raise the temperature to 110-120°C, add the remaining base oil, continue to heat up to 140-180°C for high-temperature refining, and keep warm for 20-60 minutes;

[0029] 4. Cool to 110°C, add the above-mentioned additive combination, stir and mix for a certain period of time, continue to cool to 80-90°C, homogeneous, finished product.

[0030] The specific embodiments of the present invention can be combined arbitrarily within the scope indicated in the above methods.

Embodiment 1

[0032] Add 300Kg of 500SN base oil to the grease reaction kettle, add 19.76kg of MDI (diphenylmethane-4,4'-diisocyanate), heat to 75°C, dissolve, and quickly Add 7.06Kg of dodecylamine and 11.9kg of cyclohexylamine dissolved in 200Kg of base oil at the speed of 120°C, add 100Kg of 150BS base oil, continue to heat up to 150°C, keep warm for 20 minutes, cool down to 110°C, add 2.8 % T361A borate anti-wear extreme pressure additive, 1.2% T202, 0.5% diphenylamine, stirred for 30 minutes, cooled to 80-90°C, discharged from the kettle, homogenized, and finished.

[0033] Table 1 Test data of Example 1

[0034] Test items Urea grease method Consistency grade 25℃ NLGI mm / 10 2# GB / T269 Dropping point ℃ 270 GB / T3498 Steel mesh oil separation 25℃ 24hrs 0.19 SH / T0324 Anti-corrosion (T 2 Copper, 100℃, 24h) qualified GB / T7326 Water shower resistance (38℃, 1h)% 0.68 SH / T0109 Four Ball Test P D kg 100 GB / T3142 ...

Embodiment 2

[0036] Add 180Kg600SN base oil into the grease reactor, add 8.37kg TDI (2,4-toluene diisocyanate), heat to 75°C, after dissolving, add the dissolved 120Kg750SN base oil at a faster speed under rapid stirring 7.34kg hexadecylamine and 6.52kg cyclohexylamine, heat up to 115°C, add 160Kg base oil, continue to heat up to 150°C, keep warm for 20 minutes, cool down to 110°C, add 3% T361A borate anti-wear electrode Pressure additives, 1% of T202, 0.5% of N-phenyl-α-naphthylamine, stirred for 30 minutes, cooled to 80-90 ° C, out of the kettle, homogeneous, finished product.

[0037] The detection data of table 1 example 2

[0038] Test items Urea grease method Consistency grade 25℃ NLGI mm / 10 1# GB / T269 Dropping point ℃ 265 GB / T3498 Steel mesh oil separation 25℃ 24hrs 0.24 SH / T0324 Anti-corrosion (T 2 Copper, 100℃, 24h) qualified GB / T7326 Water shower resistance (38℃, 1h)% 0.87 SH / T0109 Four Ball Test P D kg 100 ...

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PUM

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Abstract

The invention relates to a urea grease composition and a preparation method thereof; the urea grease composition consists of base oil, thickener and additive; wherein, the base oil is various mineral base oil, synthetic oil or the mixture of the mineral base oil and the synthetic oil, and the base oil accounts for 85 percent to 95 percent of the total amount of the grease; the thickener is composed of diurea compound and the amount of the thickener accounts for 4 percent to 15 percent of the total amount of the grease; the additive consists of T361A borate extreme pressure and antiwear additive, anti-oxidant and anti-corrosion additive and anti-oxidant; wherein, the addition amount of the borate extreme pressure and antiwear additive accounts for 1 percent to 3 percent of the total amount of the grease, the addition amount of the anti-oxidant and anti-corrosion additive accounts for 0.5 percent to 2 percent of the total amount of the grease and the addition amount of the anti-oxidant accounts for 0.3 percent to 1 percent of the total amount of the grease; the invention combines the advantages of the borate and the traditional sulfur-phosphorous additive and the urea grease added with the borate extreme pressure and antiwear additive still has excellent water resistance, thus improving the comprehensive performance of the product and reducing the cost.

Description

technical field [0001] The invention relates to a lubricating grease, in particular to a urea-based lubricating grease composition widely used in bearings of continuous casting machines in iron and steel plants and a preparation method thereof. Background technique [0002] With the innovation of machinery and equipment in industries such as iron and steel, the requirements for improving product quality, improving production capacity and ensuring the reliability of equipment have become stronger. Since the lubricating grease used in these mechanical equipment is in a rough environment, that is, high temperature, contact with water, there may be intrusion of some impurities such as iron scale, and it will work continuously under harsh conditions day and night, so the lubrication conditions are harsh. This requires that the grease has excellent sealing resistance and can reduce friction and wear to prolong the life of machine components and avoid sudden failure as much as poss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C10M115/08C10M125/26C10N30/06C10N30/12C10N30/10
Inventor 李元正张连惠
Owner 杭州得润宝油脂股份有限公司
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