High-temperature grease composition and preparation method thereof

A technology of high temperature resistant grease and composition, applied in the direction of lubricating composition, etc., can solve the problems of stuck running parts, difficulty of grease to meet the lubrication requirements of heavy-duty equipment, lubrication failure, etc.

Inactive Publication Date: 2015-02-25
WUXI FEITIAN GREASE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the general-purpose high-temperature greases usually include composite aluminum-based greases and urea-based greases, among which the composite aluminum-based greases tend to soften and lose at high temperatures (generally, the softening is obvious above 120°C, and loss occurs), causing equipment lubrication Ineffective; and urea-based grease, hardening at high temperature (according to different urea-based greases, the hardening temperature is different, generally hardening occurs at 120 ~ 150 ° C), and as the temperature increases, the hardening phenomenon becomes more obvious , often causes the moving parts to be stuck during high temperature operation, and even causes the moving parts to sinter together, resulting in the shutdown of the equipment
General lubricating grease is difficult to meet the lubrication requirements of heavy-duty equipment, and it is easy to cause lubrication failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In this embodiment, a high temperature resistant grease composition is made of the following raw materials in parts by weight: 80 parts of a mixture of tallow and sheep oil, 5 parts of polyurea, 5 parts of organic dyes, 0.5 parts of sulfurized isobutylene, two 2 parts of molybdenum sulfide, 0.2 parts of phenylenediamine, 0.5 parts of hexadecylamine, 0.2 parts of calcium oxide and 0.7 parts of phosphorodithioate.

[0016] Wherein, the weight ratio of tallow and suet is 2:1; the purity of the calcium oxide is more than 99%.

[0017] The preparation method of the lubricating grease composition: put the mixture of tallow and sheep oil in a reaction vessel, heat up to 50°C, add polyurea, organic dyes and sulfurized isobutylene, stir for 30 minutes, heat up to 75°C again, and add two Molybdenum sulfide, phenylenediamine, hexadecylamine, calcium oxide and phosphorodithioate were stirred for 50 minutes, and finally a grease composition was obtained through homogenization.

[0...

Embodiment 2

[0020] In this embodiment, a high temperature resistant grease composition is made of the following raw materials in parts by weight: 100 parts of lard, 8 parts of polyurea, 8 parts of organic dyes, 0.8 parts of isobutylene sulfur, 1 part of molybdenum disulfide, 0.4 parts of phenylenediamine, 0.8 parts of hexadecylamine, 0.4 parts of calcium oxide and 0.3 parts of phosphorodithioate.

[0021] Wherein, the purity of the calcium oxide is above 99%.

[0022] The preparation method of the lubricating grease composition: put lard in a reaction container, heat up to 40°C, add polyurea, organic dyes and sulfurized isobutylene, stir for 30 minutes, heat up to 75°C again, add molybdenum disulfide, benzene Amine, hexadecylamine, calcium oxide and phosphorodithioate, stirred for 50 minutes, and finally a grease composition was obtained by homogenization.

[0023] In this example, the viscosity of the grease at 100°C is 840Pa*S, the penetration (0.1mm) is 70, the copper piece is placed ...

Embodiment 3

[0025] In this embodiment, a high temperature resistant grease composition is made of the following raw materials in parts by weight: 94 parts of lard and sheep oil mixture, 6 parts of polyurea, 6 parts of organic dye, 0.7 part of sulfurized isobutylene, disulfide 1.4 parts of molybdenum, 0.3 parts of phenylenediamine, 0.7 parts of hexadecylamine, 0.3 parts of calcium oxide and 0.6 parts of phosphorodithioate.

[0026] Wherein, the weight ratio of sheep oil and lard is 1:3; the purity of the calcium oxide is more than 99%.

[0027] The preparation method of the lubricating grease composition: put the mixture of lard and mutton oil in a reaction vessel, heat up to 50°C, add polyurea, organic dyes and sulfurized isobutylene, stir for 50 minutes, heat up to 65°C again, and add disulfide in turn Molybdenum, phenylenediamine, hexadecylamine, calcium oxide and phosphorodithioate were stirred for 60 minutes, and finally a grease composition was obtained by homogenization.

[0028] I...

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Abstract

The invention relates to a high-temperature grease composition and a preparation method thereof. The composition comprises animal grease, polyurea, organic dye, sulfurized isobutylene, molybdenum disulfide, phenylenediamine, hexadecylamine, calcium oxide and phosphorodithioate. The preparation method of the grease composition provided by the invention has the advantages of simpleness and reasonable ratio of raw materials; the composition has good high temperature performance. Polyurea, organic dye and sulfurized isobutylene are used as thickeners to make little change of grease under the condition of temperature change, so as to meet the usage requirement in high temperature; the addition of molybdenum disulfide, phenylenediamine, hexadecylamine, calcium oxide and dithiophosphate improves the work performance of the grease under high temperature conditions, so that the grease is not easy to soften under high temperature condition.

Description

technical field [0001] The invention relates to a high-temperature-resistant lubricating grease composition, which belongs to the technical field of industrial chemicals. Background technique [0002] Grease is a kind of lubricant with non-Newtonian fluid characteristics between semi-fluid and solid, which is obtained by dispersing one or more thickeners in one or more liquid lubricants. The basic characteristics of grease are that it has a certain shape, is easy to adhere, and has lower fluidity than the corresponding base oil. Grease is used in the friction parts of machinery to lubricate and seal. [0003] The characteristic of the grease itself is that the consistency of the grease changes greatly with the change of temperature, especially the high-temperature grease, although it has a high dropping point (dropping point greater than 300°C), the grease becomes soft and loses as the temperature rises Or harden and coke, and have lost their lubricating effect. At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06
Inventor 张群敏许华平
Owner WUXI FEITIAN GREASE
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