6028-51-9Relevant academic research and scientific papers
Molybdenum-containing thiadiazole derivative of phosphorothioate, and preparation method and application thereof
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Paragraph 0025, (2020/11/23)
The invention provides a molybdenum-containing thiadiazole derivative of phosphorothioate, belonging to the technical field of lubricating oil additives. The structural formula of the molybdenum-containing thiadiazole derivative of phosphorothioate is as shown in the specification. In the structural formula, R1 and R2 are straight-chain or branched-chain C4-C13 alkyl groups. The invention also provides a preparation method of the molybdenum-containing thiadiazole derivative of phosphorothioate. The molybdenum-containing thiadiazole derivative of phosphorothioate is used as a lubricating oil additive, has good lubricity, high extreme pressure performance and good thermal stability, and is an excellent antifriction additive for lubricating oil.
Characterization of Dialkyldithiophosphates as Slow Hydrogen Sulfide Releasing Chemicals and Their Effect on the Growth of Maize
Carter, Justin M.,Brown, Eric M.,Irish, Erin E.,Bowden, Ned B.
, (2019/11/03)
Hydrogen sulfide is a key gasotransmitter for plants and has been shown to greatly increase their growth and survival in the presence of environmental stressors. Current methods for slowly releasing hydrogen sulfide use chemicals, such as GYY-4137, but these result in the release of chemicals not found in the environment, and chemicals used may lack structures that can be readily tuned to affect the rate of release of hydrogen sulfide. In this article, we describe the synthesis and slow release of hydrogen sulfide from dialkyldithiophosphates, which are a new set of hydrogen sulfide releasing chemicals that can be used in agriculture. The rates of hydrolysis of dibutyldithiophosphate and GYY-4137 were measured in water at 85 °C and compared with each other to investigate their differences. GYY-4137 is widely used as a chemical that slowly releases H2S, but its rate of release was not previously quantified. The release of hydrogen sulfide in water at room temperature was measured for a series of dialkyldithiophosphates using a hydrogen sulfide electrode. It was shown that the structure of the dialkyldithiophosphate affected the amount of hydrogen sulfide released. The final degradation products of dibutyldithiophosphate were shown to be phosphoric acid and butanol, which are chemicals found in the environment. This result was notable because it demonstrated that dialkyldithiophosphates degrade to safe, natural chemicals that will not pollute the environment. To demonstrate that dialkyldithiophosphates have potential applications in agriculture, maize was grown for 4.5 weeks after exposure to 1-200 mg of dibutyldithiophosphate, and the weight of corn plants increased by up to 39% at low loadings of dibutyldithiophosphate.
Free-metal dicarboxylic acid derivatives and antiwear additives and lubricant compositions comprising the same
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Paragraph 0294; 0295, (2018/02/27)
The present invention relates to heavy-metal-free dicarboxylic acid derivatives and to a wear-resistant and lubricant composition comprising the same. The lubricant composition comprising a dicarboxylic acid derivative compound according to the present invention has superior abrasion resistance performance to abrasion resistance performance of a conventional lubricant oil composition, and even when used at a lower content than the conventional lubricant oil composition, more excellent effects are exhibited, wherein heavy metals are not used to be environment-friendly, thereby being usefully used as engine oil, lubricating oil for a transmission, gear-oil, turbine oil, operation oil, refrigerator oil, compressor oil, vacuum pump oil, bearing oil, sliding surface oil, crude oil, metal cutting oil, plastic working oil, heat-treated oil, lubricating oil or processed oil additives.COPYRIGHT KIPO 2017
Dicarboxylic acid derivatives containing dialkyldithiophosphate group and antiwear additives and lubricant compositions comprising the same
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Paragraph 0174; 0179-0180, (2018/02/22)
The present invention relates to dicarboxlic acid derivatives containing a dialkyl dithiophosphate group, and a wear-resistant additive and a lubricant composition comprising the same. According to the present invention, a lubricant composition comprising a dicarboxlic acid derivative compound having a dialkyl dithiophosphate group has excellent wear resistance compared to an existing lubricant composition, shows excellent effects even with a lower content than existing lubricating oil compositions, and is environment-friendly because heavy metals are not used. Accordingly, the lubricant composition can be usefully used as an additive of engine oil, lubricating oil for transmission, gear-oil, turbine oil, working oil, refrigerant oil, compressor oil, vacuum pump oil, bearing oil, sliding surface oil, metal cutting oil, plastic working oil, heat treatment oil, lubricating oil or processing oil.COPYRIGHT KIPO 2017
A composition of organic hetero compounds as an antioxidant and antiwear additive for mineral lubricating oils
Zolotov,Kuz'Mina,Zolotov,Bartko,Sipatrov,Parenago
, p. 262 - 266 (2013/08/23)
As a multifunctional additive exhibiting antioxidant and antiwear activity for mineral lubricating oil, a composition of ammonium dialkyldithiophosphate (ADTP) with tetraalkyl thiuram disulfide (TDS) has been proposed, which provides lower sulfated ash, phosphorus, and sulfur contents compared with the traditional additive zinc dialkyldithiophosphate used for the same functions. Ammonium dialkyldithiophosphates bearing various alkyl radicals have been synthesized using structurally different amines. The antioxidant efficiency of ADTP samples has been shown by monitoring the formation and degradation of hydroperoxides in a hexadecane medium as a model of mineral oil. The tribological parameters of these compounds have been determined under boundary lubrication conditions.
Multifunctional lubricant additives
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, (2008/06/13)
Novel compounds of the formula (I) STR1 in which X is oxygen or sulfur, R and R1 independently of one another are C3 -C30 alkyl, R2 is C4 -C18 alkyl and R3, R4, R5 and R6 independently of one another are H, C1 -C20 alkyl, C3 -C20 alkenyl, benzyl, phenyl or phenyl which is substituted by C1 -C12 alkyl, and in which R5 and R6 can also be a direct bond, or R3 and R4 together are trimethylene, tetramethylene, STR2 and R5 and R6 are a direct bond or H, or in each case R3 and R6 together are a group =CH2 and R4 and R5 are H, or R4 and R5 together are a group =CH2 and R3 and R6 are H, or R3, R4, R5 and R6 together are STR3 and salts of these compounds, are described. They can be employed as multipurpose additives, in particular as anticorrosion, high pressure and antiwear additives, and as antioxidants in the lubricants and hydraulic or metalworking fluids.
Process for reacting alcohols and/or phenols with phosphorus pentasulfide
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, (2008/06/13)
The invention relates to a process wherein an alcohol and/or phenol is reacted with phosphorus pentasulfide in the presence of a catalyst which is selected from (a) phosphonium salts of the general formula: STR1 (b) ammonium salts of the general formula: STR2 (c) phosphine oxides of the general formula: STR3 (d) phosphine sulfides of the general formula: STR4 (e) phosphinic acid derivatives of the general formula: STR5 In formulae I through V, the substituents R1, R2, R3 and R4 each stand for identical or different alkyl-, aryl-, alkaryl- or aralkyl- groups having from 1 to 22 carbon atoms. A stands for an inorganic or organic acid, and X and Y, respectively, stand for both oxygen and sulfur, and M stands for a monovalent metal or oxygen.
