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A technology of improver and lubricating oil, applied in the field of lubricating oil, can solve the problems of poor dispersibility, uncontrollable process, unstable product quality, etc., and achieve the effect of changing viscosity-temperature performance, changing viscosity-temperature characteristics, and preventing further growth.
Inactive Publication Date: 2017-12-22
如皋市康利化工有限公司
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Problems solved by technology
If the dry dosage is increased and the temperature is increased, the process cannot be controlled, so the product qualit
Method used
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Embodiment 1
[0013] Add 18 tons of solvent hexane into a 90m3 polymerization vessel, add it to 10°C, and continuously feed ethylene, propylene, styrene and hydrogen into the reactor, and the molar ratio of hydrogen, ethylene, propylene and styrene is 0.1:0.45 : 1: 0.8, stirred and reacted for 1 hour, added 1.8kg main catalyst benzoyl peroxide and 3.6kg cocatalyst triethylaluminum, stopped stirring after the reaction, added methanol to terminate, washed with NaOH alkali solution, and vacuum dried to obtain The product is ethylene propylene styrene copolymer.
Embodiment 2
[0015] Add 20 tons of solvent hexane into a 90m3 polymerization vessel, add it to 20°C, and continuously feed ethylene, propylene, styrene and hydrogen into the reactor, and the molar ratio of hydrogen, ethylene, propylene and styrene is 0.3:0.5 : 1: 1, stirred and reacted for 2 hours, added 20kg main catalyst benzoyl peroxide and 80kg cocatalyst triethylaluminum, stopped stirring after the end of the reaction, added methanol to terminate, washed with NaOH alkaline solution, and vacuum dried to obtain the product ethylene Propylene styrene copolymer.
Embodiment 3
[0017] Add 25 tons of solvent hexane in a 90m3 polymerization vessel, heat to 30°C, and continuously feed ethylene, propylene, styrene and hydrogen into the reactor, and the molar ratio of hydrogen, ethylene, propylene and styrene is 0.2: 1:1:0.8, stirred for 2.5 hours, added 125kg of main catalyst benzoyl peroxide and 875kg of cocatalyst triethylaluminum, stopped stirring after the reaction, added methanol to terminate, washed with NaOH alkali solution, and vacuum dried to obtain the product Ethylene Propylene Styrene Copolymer.
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Abstract
The invention belongs to the field of lubricants and particularly relates to a viscosity-temperature improver for a lubricant. The viscosity-temperature improver is prepared by the following steps: adding a solvent (hexane) into a polymerization reaction vessel till the temperature is 10-50 DEG C; continually adding ethylene, propylene, styrene and hydrogen into the reaction vessel, wherein the molar ratio of hydrogen to ethylene to propylene to styrene is (0.1-0.3):(0.45-1):1:(0.8-1); performing stirring for a reaction for 1-3 h; adding a main catalyst (benzoyl peroxide) and an auxiliary catalyst (triethyl aluminum), wherein the addition of the main catalyst is 0.01-1% (by weight) of that of the solvent, and the weight of the auxiliary catalyst is 2-10 times of that of the main catalyst; stopping stirring after finish of the reaction; adding methyl alcohol for termination; washing with an alkaline solution; and performing vacuum drying to obtain a product (an ethylene, propylene and styrene copolymer). The viscosity-temperature improver for the lubricant can change such aggregative indicators as the viscosity-temperature performance, the thickening capability, the low-temperature performance and the dispersity of the lubricant, and ensures that the aggregative indicators are remarkably superior to like products at present.
Description
technical field [0001] The invention belongs to the field of lubricating oil, in particular to a viscosity-temperature improver for lubricating oil. Background technique [0002] Viscosity temperature improver is one of the indispensable additives of multi-grade engine oil, and its proportion is second only to detergent and dispersant. Statistics in the United States show that the amount of viscosity index improver is increasing at a rate of 12% per year. The essence of the viscosity-temperature improver is to improve the viscosity-temperature performance of the oil, so that the oil has a higher viscosity index, so as to ensure that the engine can start smoothly at low temperature, and the oil has sufficient viscosity at high temperature to ensure good lubrication . At the same time, it is required that the viscosity-temperature improver does not have obvious harmful effects on the oxidation stability and detergency of the oil, and the multi-grade engine oil has less viscos...
Claims
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Application Information
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