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A kind of thiadiazole dimer lubricating grease additive and its preparation and application

A technology of grease additive and thiadiazole dimer, which is applied in the field of chemical substances in grease and its preparation, can solve the problems of metal corrosion, environmental protection, heavy odor, etc., and achieve easy reconciliation, easy addition, good resistance Effects of Oxidation Performance and Anticorrosion Performance

Active Publication Date: 2015-09-16
太平洋联合(北京)石油化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the current technical conditions, the extreme pressure additives in lubricating grease are still mainly additives containing active S, P elements and heavy metal elements, such as chlorinated paraffin, sulfurized olefin, sulfurized lard, phosphate ester, phosphate, ZDDP, etc., with Heavy smell, not environmentally friendly, and severe corrosion to metal

Method used

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  • A kind of thiadiazole dimer lubricating grease additive and its preparation and application
  • A kind of thiadiazole dimer lubricating grease additive and its preparation and application
  • A kind of thiadiazole dimer lubricating grease additive and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 0.5mol (75.1g) DMTD into a reaction vessel containing 400ml water and stir for 0.5 hours, then add 0.5mol sodium hydroxide, that is, 80.1g of 25% aqueous sodium hydroxide solution, stir at room temperature for 1 hour, then add 0.125mol Hydrogen peroxide, i.e. 12.1g of 35% aqueous solution and 0.5mol hydrochloric acid, i.e. 57.1g of 32% aqueous hydrochloric acid solution, continue to react for 3 hours, then wash and filter until the filtrate is neutral, then heat up to 100°C, distill off the water, and dry Dry to light yellow powder, cool down to 80°C, add 47.4g ether solvent triethylene glycol butyl ether and PAG (fatty alcohol polyoxyethylene ether), the mass ratio of the two is 8:3, mix and stir for 0.5 hours, cool down, The thiadiazole dimer grease additive (No. P6002-01) was obtained by filtration with a yield of 96.5%.

Embodiment 2

[0033] Add 0.5mol DMTD (75.1g) into a reaction vessel containing 400ml of water and stir for 0.6 hours, then add 0.525mol of a 25% aqueous solution of sodium hydroxide, stir at room temperature for 1.2 hours, then add 0.12mol of 35% hydrogen peroxide Aqueous solution and 0.5mol hydrochloric acid, that is, 57.1g of 32% hydrochloric acid aqueous solution, continue to react for 3.5 hours, then wash, filter until the filtrate is neutral, then heat up to 105°C, evaporate water, dry to obtain light yellow powder, cool to 75°C, add 47.4g ether solvent triethylene glycol butyl ether and PAG, the mass ratio is 8:2.5, mix and stir for 0.6 hours, cool down, filter to obtain thiadiazole dimer grease additive (number P6002-02) , and the yield was 96.9%.

Embodiment 3

[0035] Add 0.5mol DMTD (75.1g) into a reaction vessel containing 400ml of water and stir for 0.7 hours, then add 0.5mol of a 25% aqueous solution of sodium hydroxide and stir at room temperature for 1.4 hours, then add 0.13mol of a 35% aqueous solution of hydrogen peroxide Continue to react with 32% aqueous solution (57.1g) of 0.5mol hydrochloric acid for 4 hours, then wash and filter until the filtrate is neutral, then heat up to 110°C, evaporate water, dry to obtain a light yellow powder, and cool down to 70°C , add 47.4g of ether solvent triethylene glycol butyl ether and PAG, the mass ratio is 8:3.5, mix and stir for 0.7 hours, cool down, and filter to obtain thiadiazole dimer grease additive (number P6002-03), the product The rate is 97.1%.

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Abstract

The invention provides a thiadiazole dimer lubricating grease additive having a general structural formula as described in the specification. In the formula, X represents hydrogen or an alkali metal. According to the invention, a proper catalyst is selected to allow DMTD to undergo bridging and polymerization; a prepared product has superhigh sulfur content, which enables excellent extreme-pressure anti-abrasion performance to be presented in application; at the same time, a unique nitrogen heterocyclic ring structure in the invention enables free radicals generated by oxidation of the lubricating grease to be effectively chelated so as to form a compact protective film on a metal interface, so good oxidation resistance and corrosion protection performance are obtained. Because the additive is liquid, addition and blending of the additive in operation are easier, the additive does not contain metals and is easily biodegradable, so the thiadiazole dimer lubricating grease additive is an ashless environment-friendly additive.

Description

technical field [0001] The invention belongs to the field of lubricants, in particular to a chemical substance in lubricating grease and a preparation method thereof. Background technique [0002] Thiadiazole derivatives have a heterocyclic structure containing S and N atoms, so this type of compound has high activity and is widely used in production and life. It is used as a fungicide in agriculture and medicine, and in lubricating grease. Used as a metal deactivator. [0003] Extreme pressure additives can react with the metal surface in contact to form a high melting point inorganic film, which can form a protective film (adsorption or reaction film) on the friction surface to prevent fusing, seizure, scratches or scratches under high load additives. The extreme pressure agent should have four-ball anti-sintering performance and an appropriate Timken OK value. Under the current technical conditions, the extreme pressure additives in lubricating grease are still mainly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M135/36C07D285/125C10N30/10C10N30/12
Inventor 张桂林
Owner 太平洋联合(北京)石油化工有限公司
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