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Preparation technique of medium/high-viscosity dimethyl silicone oil

A technology of dimethyl silicone oil and preparation process, which is applied in the field of preparation technology of medium and high viscosity dimethyl silicone oil, can solve problems such as increasing product cost, and achieve the effects of reducing pollution, improving strength and good selectivity

Inactive Publication Date: 2014-10-01
广州市亿成有机硅有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When sodium hydroxide or potassium hydroxide is used as a catalyst, its consumption is small, but neutralization and filtration are still required in the later stage of production, which increases the cost of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Catalyst preparation:

[0023] Add 100Kg of chloromethylated polystyrene spheres, 300Kg of trimethylamine aqueous solution, and 30Kg of perfluorotertiary amine into a 1000L reactor; 300Kg of methanol was reacted at 40°C for 13 hours to prepare a perfluoroquaternary ammonium type strongly basic anion exchange resin loaded with potassium hydroxide.

[0024] (2) Synthetic reaction of simethicone oil:

[0025] In 1000L reactor, add octamethylcyclotetrasiloxane (D4) 100Kg, hexamethyldisiloxane (MM) 2Kg, the perfluorinated quaternary ammonium type strong base of the loaded potassium hydroxide that step (2) makes Reactive anion exchange resin 15Kg, react at a temperature of 60°C for 10 hours, and then extract low boilers under reduced pressure. Lower the temperature to obtain simethicone, the reaction yield and the viscosity of simethicone are shown in Table 1.

Embodiment 2

[0027] (1) Catalyst preparation:

[0028] Add 100Kg of chloromethylated polystyrene spheres, 200Kg of trimethylamine aqueous solution, and 10Kg of perfluorotertiary amine into a 1000L reactor; 100Kg of methanol was reacted at 20°C for 20 hours to prepare a perfluoroquaternary ammonium strongly basic anion exchange resin loaded with potassium hydroxide.

[0029] (2) Synthetic reaction of simethicone oil:

[0030] In 1000L reactor, add octamethylcyclotetrasiloxane (D4) 100Kg, hexamethyldisiloxane (MM) 0.2Kg, the perfluorinated quaternary ammonium type of the loaded potassium hydroxide that step (2) makes 15Kg of basic anion exchange resin was reacted at a temperature of 40°C for 15 hours, and then the low boilers were extracted under reduced pressure. Lower the temperature to obtain simethicone, the reaction yield and the viscosity of simethicone are shown in Table 1.

Embodiment 3

[0032] (1) Catalyst preparation:

[0033] Add 100Kg of chloromethylated polystyrene spheres, 500Kg of trimethylamine aqueous solution, and 50Kg of perfluorotertiary amine into a 1000L reactor; 500Kg of methanol was reacted at 50°C for 10 hours to prepare a perfluoroquaternary ammonium type strongly basic anion exchange resin loaded with potassium hydroxide.

[0034] (2) Synthetic reaction of simethicone oil:

[0035] Add octamethylcyclotetrasiloxane (D4) 100Kg in 1000L reactor, hexamethyldisiloxane (MM) 10Kg, the perfluorinated quaternary ammonium type strong base of the loaded potassium hydroxide that step (2) makes Reactive anion exchange resin 15Kg, react at a temperature of 80°C for 5 hours, and then extract low boilers under reduced pressure. Lower the temperature to obtain simethicone, the reaction yield and the viscosity of simethicone are shown in Table 1.

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PUM

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Abstract

The invention discloses a preparation technique of medium / high-viscosity dimethyl silicone oil, which comprises the following steps: swelling chloromethylated polystyrene balls in a trimethylamine water solution, and adding perfluoro tertiary amine; supporting potassium hydroxide to obtain a composite catalyst, and adding octamethylcyclotetrasiloxane (D4) and hexamethyl disiloxane (MM) into the reaction kettle; and after the reaction finishes, filtering to recover the catalyst, extracting under reduced pressure and recovering the low-boiling-point substances, thereby obtaining the methyl silicone oil product.

Description

technical field [0001] The invention relates to a method for preparing an organosilicon product, in particular to a method for preparing a medium-high viscosity dimethyl silicone oil. Background technique [0002] Simethicone is a colorless, odorless, transparent liquid with low surface tension, high surface activity, excellent defoaming and anti-foaming properties, and good film-forming properties. Simethicone is hydrophobic and insoluble in water. Simethicone oil has good isolation from other substances and has excellent lubricating performance. It has the function of blocking moisture without affecting the breathability. Simethicone has little change in viscosity over a wide temperature range. Excellent heat resistance and acid resistance. It has stable chemical properties, high boiling point, low freezing point, and a wide temperature range as a liquid. Simethicone oil has good electrical properties, especially in various frequency ranges, the rate factor is small, ...

Claims

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Application Information

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IPC IPC(8): C08G77/08
Inventor 王琪宇董建国
Owner 广州市亿成有机硅有限公司
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