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Alkaline-water-resistant lubricating grease and preparation method thereof

A technology of lubricating grease and alkaline water, applied in the field of lubrication, can solve the problems of bearing rust damage, poor protection performance, bearing rust, etc., and achieve the effect of neat molecular composition of polyurea and good shear resistance.

Active Publication Date: 2020-04-28
辽宁海华科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foam is easy to be generated during use, which often causes the degreasing agent to overflow and flow into the idler bearing below, reducing the tension of the oil-water interface and increasing the contact area, resulting in the disappearance of the oil film, and finally the bearing is rusted and damaged when it encounters water
[0004] Ordinary lubricating grease is difficult to withstand the washing and immersion of a large amount of water, resulting in rust and damage to the bearing
Some special water-resistant greases or anti-rust greases can effectively improve the water-resistant and anti-rust properties, but when faced with such degreasing agents rich in a large amount of alkali agents and surfactants, their protective performance is still poor, and they will still be damaged. Conditions that cause bearings to rust and become damaged

Method used

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  • Alkaline-water-resistant lubricating grease and preparation method thereof
  • Alkaline-water-resistant lubricating grease and preparation method thereof
  • Alkaline-water-resistant lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] An alkaline water-resistant grease consisting of the following components: naphthenic oil: 257.6kg; paraffinic base oil: 601.1kg; 4.4`-diphenylmethane diisocyanate: 61.3kg; aniline: 12.8kg; cyclohexylamine : 36.2kg; Nonyl diphenylamine: 3kg; Maleic anhydride grafted polyethylene wax: 2kg; Sodium petroleum sulfonate: 5kg; Sorbitan monooleate: 5kg; Calcium bicarbonate: 8kg; Polyaluminum chloride: 3kg; zinc carbamate: 5kg.

[0065] The preparation method of anti-alkali water lubricating grease is as follows:

[0066]Mix naphthenic oil and paraffin base oil with maleic anhydride grafted polyethylene wax, heat up to 40-50°C; half of the mixed oil is used to dissolve 4.4`-diphenylmethane diisocyanate, and the other half is used To dissolve aniline; after all the dissolution, 3 / 5 of the dissolved oil of 4.4`-diphenylmethane diisocyanate is mixed with the dissolved oil of aniline to carry out a one-step polymerization reaction for 1.5~2.0h; after the reaction, add cyclohexylam...

Embodiment 2

[0068] An alkaline water-resistant lubricating grease, consisting of the following components: naphthenic oil: 254.1kg; second-class hydrogenated oil: 592.8kg; 4.4`-diphenylmethane diisocyanate: 71.9kg; aniline: 15.9kg; Hexylamine: 42.3kg; phenyl α-naphthylamine: 4kg; maleic anhydride grafted polyethylene wax: 2.5kg; petroleum calcium sulfonate: 5kg; magnesium bicarbonate: 4kg; polyaluminum chloride: 3.5kg; 4kg.

[0069] The preparation method of anti-alkali water lubricating grease is as follows:

[0070] Mix naphthenic oil and type II hydrogenated oil with maleic anhydride grafted polyethylene wax, heat up to 40-50°C, half of the mixed oil is used to dissolve 4.4`-diphenylmethane diisocyanate, and the other Half of it is used to dissolve aniline; after all of it is dissolved, 2 / 3 of the dissolved oil of 4.4`-diphenylmethane diisocyanate is mixed with the dissolved oil of aniline for one-step polymerization reaction for 1.5-2.0 hours; after the reaction, add cyclohexylamine ...

Embodiment 3

[0072] An alkaline water-resistant grease consisting of the following components: naphthenic oil: 289.1kg; paraffinic base oil: 289.2kg; polyalphaolefin: 247.9kg; 2.4-tolyl diisocyanate: 77.6kg; aniline: 16.9kg ; Cyclohexylamine: 46.3kg; Methylene bis-dibutyldithiocarbamate: 10kg; Maleic anhydride grafted polyethylene wax: 3kg; Petroleum calcium sulfonate: 10kg; Magnesium bicarbonate: 4kg; Aluminum chloride: 2.5kg; dimercaptothiadiazole dimer: 3.5kg.

[0073] The preparation method of anti-alkali water lubricating grease is as follows:

[0074] Mix naphthenic oil, paraffin base oil and polyalphaolefin with maleic anhydride grafted polyethylene wax, heat up to 40-50°C, half of the mixed oil is used to dissolve 2.4-tolyl diisocyanate, and the other half It is used to dissolve aniline; after it is completely dissolved, 3 / 5 of the dissolved oil of 2.4-tolyl diisocyanate is mixed with the dissolved oil of aniline for one-step polymerization reaction for 1.5-2.0 hours; after the re...

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Abstract

The invention relates to an alkaline-water-resistant lubricating grease, which comprises the following raw materials in parts by weight: 75.0-90.0 parts of base oil; 2.0 to 7.0 parts by weight of isocyanate; 2.2 to 7.5 parts by weight of organic amine; 0.2 to 1.0 part by weight of an antioxidant; 0.1 to 2.0 parts by weight of a tackifier; 0.3 to 2.0 parts by weight of an antirust agent; 0.1 to 5.0parts by weight of an emulsification inhibitor; 0.1 to 5.0 parts by weight of a coagulant; 0.3 to 1.5 parts by weight of an anti-wear agent; wherein the organic amine is aniline and cyclohexylamine,and the weight ratio of the aniline to the cyclohexylamine is 0.2-0.6. The basic grease of the alkaline-water-resistant lubricating grease is polyurea lubricating grease, and the polarity of the basicgrease is weaker than that of metallic soap, so that the soap fiber structure is not easily damaged by the influence of a strong-basicity degreasing agent; the alkaline-water-resistant lubricating grease can be used for preventing various degreasing agents such as an organic solvent, an alkaline agent and a surfactant from damaging lubrication.

Description

technical field [0001] The invention relates to the technical field of lubrication, in particular to an alkali-water-resistant lubricating grease and a preparation method thereof. Background technique [0002] During the production process of cold-rolled sheets, pollutants such as dust, iron powder, rolling oil and emulsion are easily attached to the surface. Such pollutants will form solid particles and carbides when they enter the annealing furnace together with the cold-rolled sheets. Causes indentation and scratches on the surface of the strip, which in turn affects the quality and surface finish of the strip. Therefore, in the process of cold rolling and continuous annealing and galvanizing, the cleaning of the strip surface in the cleaning section is a very critical step. [0003] The cleaning agent mainly used in the cold rolling cleaning section is a degreasing agent (4% diluted aqueous solution), and its main components are alkaline agents and surfactants. The clea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M177/00C10N50/10C10N30/06C10N30/12
CPCC10M169/00C10M177/00C10M2217/0456C10M2203/045C10M2205/163C10M2215/064C10M2215/065C10M2205/14C10M2207/123C10M2219/044C10M2207/289C10M2215/10C10M2201/062C10M2201/042C10M2223/04C10M2205/0206C10M2219/066C10M2219/106
Inventor 高宇航王庆日高鹰王佳李元鸿李明慧
Owner 辽宁海华科技股份有限公司
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