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A kind of synthetic method of fluorosilicone antifoam agent for engine oil

A technology of engine oil and synthesis method, which is applied in the direction of additives, petroleum industry, lubricating composition, etc., can solve the problems of no application of engine oil anti-foaming technology, complicated process, high cost, etc., and achieves high cost performance, simple operation method, and equipment less demanding effect

Active Publication Date: 2018-02-09
JINZHOU DPF TH CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the raw materials of fluorine in fluorosilicon antifoaming agent mainly come from fluorine-containing intermediates obtained by telomerization, oligomerization, hexafluoroalkoxypropane and its polymers, and electrolysis of fluoroolefins. The process is complex, costly, and polluting.
Fluorosilicone oil and antifoaming agent can be obtained by using trifluoropropylcyclotrisiloxane as a polymer, but it has not been applied in the field of antifoaming technology of high-grade engine oil

Method used

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  • A kind of synthetic method of fluorosilicone antifoam agent for engine oil
  • A kind of synthetic method of fluorosilicone antifoam agent for engine oil
  • A kind of synthetic method of fluorosilicone antifoam agent for engine oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]Add 95.7 g of octamethylcyclotetrasiloxane and 0.3 g of tetramethyldihydrodisiloxane end-capping agent into a 250 mL four-neck glass flask equipped with a digital display electric stirrer, thermocouple, cooler, and electric heating mantle and tetramethylammonium hydroxide 1g, stir and heat up to 55°C, add 3g of trifluoropropylmethylcyclotrisiloxane dropwise, complete the dropwise addition in 1 hour, keep the temperature at 75°C to 80°C for 6 hours, then heat up to 150°C, vacuum degree -0.098Mpa, after evacuating to remove low-molecular substances for 2 hours, filter to obtain 98.1g of fluorosilicone antifoaming agent for engine oil, the yield is 99%, and the kinematic viscosity at 100°C is 400mm 2 / s.

Embodiment 2

[0031] Add 10.1 g of octamethylcyclotetrasiloxane, 0.601 g of hexamethyldisiloxane end-capping agent and 98 wt. % Concentrated sulfuric acid catalyst 4g, stir and heat up to 75°C, add 185.6g of trifluoropropylmethylcyclotrisiloxane dropwise, complete the dropwise addition in 1.5h, keep the temperature at 80°C-95°C for 3h, add sodium bicarbonate The PH value of 7g was detected to be 9, the temperature was raised to 155°C, the vacuum degree was -0.095Mpa, and low-molecular substances were evacuated for 1 hour, and then filtered to obtain 193.4g of fluorosilicone antifoaming agent for engine oil, with a yield of 98.5%. Run at 100°C Viscosity is 305mm 2 / s.

Embodiment 3

[0033] (1) Add 90 g of octamethylcyclotetrasiloxane and 24.7 g of hexamethyldisiloxane end-capping agent into a 250 mL four-necked glass flask equipped with a digital display electric stirrer, thermocouple, cooler, and electric heating mantle , 0.35g of tetramethylammonium hydroxide, stirring and raising the temperature to 80°C-100°C, maintaining the temperature for 3h, and removing low-molecular substances at 100°C and a vacuum of -0.098Mpa for 2h to obtain a fluorine-free low-molecular-weight end-capping agent;

[0034] (2) In a 250mL four-necked glass flask equipped with a digital display electric stirrer, thermocouple, cooler, and electric heating mantle, add 35.5 g of octamethylcyclotetrasiloxane, the fluorine-free low molecular weight prepared in step (1) 10g of end-capping agent and 4.5g of 98wt% concentrated sulfuric acid catalyst, stir and heat up to 65°C, add 50g of trifluoropropylmethylcyclotrisiloxane dropwise, complete the dropwise addition in 1h, keep the temperat...

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Abstract

The invention provides a method for synthesizing a fluorine silicon antifoaming agent for engine oil. According to the method, organosilicone monomer hexamethyl cyclotrisiloxane or octamethylcyclotetrasiloxane serves as the main raw material, under the action of a catalyst, an end-capping reagent is added, a reaction with 1, 3, 5-tris (3, 3, 3-trifluoropropyl) methylcyclotrisiloxane is conducted, after the reaction is completed, low molecular substances are removed, and after filtering is conducted, the fluorine silicon antifoaming agent for engine oil is obtained. The fluorine silicon antifoaming agent has the advantages of being good in solubleness and good in high-temperature anti-foaming property and is low in production cost and free of pollution; the fluorine silicon antifoaming agent is mainly used for engine oil of the APISJ level, the ILSAC CF-4 level and above, the problem of high-temperature (150 DEG C) foaming resistance of oil is solved, and the engine oil is good in foam characteristic and ideal in high-low-temperature resistance performance.

Description

technical field [0001] The invention relates to a method for synthesizing a fluorosilicone antifoaming agent for engine oil, especially for engine oils above API SJ level formulated by American Society of Petroleum Engineering, and engines with specifications above ILSAC GF-4 formulated by International Lubricating Oil Standardization and Accreditation Committee Synthesis method of fluorosilicone antifoaming agent for oil. Background technique [0002] At present, there are mainly three types of antifoaming agents: non-silicon, organic silicon and fluorosilicon. Non-silicon products include esters and polyethers, silicone products are composed of dimethyl silicone oil, and fluorosilicon products are composed of fluorine-containing monomers and silicone materials, which are widely used in many fields. [0003] Antifoaming agents for lubricating oils are also composed of the above three types. Antifoaming agents for engine oils mainly include silicones, such as the domestic b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/385C08G77/24C08G77/12C08G77/16C08G77/08C08G77/06C10M155/02C10N30/18C10N40/25
CPCC08G77/06C08G77/08C08G77/12C08G77/16C08G77/24C08G77/385C10M155/02C10N2030/18C10N2040/25
Inventor 魏奇孙百开
Owner JINZHOU DPF TH CHEM CO LTD