Preparation method of vinyl silicone oil

A technology of vinyl silicone oil and tetramethylammonium hydroxide, which is applied in the field of vinyl silicone oil, can solve the problems of high cost and low yield, and achieve the effects of increasing yield, promoting catalytic activity, and good stability

Pending Publication Date: 2022-07-12
广东新硅源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, synthetic vinyl silicone oil is generally made of methyl cyclosiloxane and methyl vinyl cyclosiloxane as raw materials, and vinyl siloxane is used as an end-capping agent. As a result, the product prepared in this way is not only low in yield, but also high in cost

Method used

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  • Preparation method of vinyl silicone oil
  • Preparation method of vinyl silicone oil

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Experimental program
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Embodiment 1

[0038] The present embodiment discloses a preparation method of vinyl silicone oil, comprising the following steps:

[0039] (1) Dehydration section: put DMC (see Table 2 for consumption) into the reactor, then heat up to 65°C, turn on the vacuum, keep the vacuum at -0.08Mpa, and dehydrate for 1h;

[0040] (2) Preparation of alkaline glue: add octamethylcyclotetrasiloxane (see Table 2 for the amount) to the flask, cool the system to 0°C, turn on the vacuum, and introduce dry nitrogen for 0.5h; hydrogen tetramethyl pentahydrate Ammonium (see Table 2 for the amount) was added to the flask, continued to open the vacuum, introduced dry nitrogen for 1 h, then reduced the nitrogen ventilation speed and vacuum strength, slowly heated up, and dehydrated to obtain an alkaline glue;

[0041] (3) Equilibrium chemical section: put the alkali glue, vinyl double end caps and vinyl ring body (see Table 2 for the amount) into the reaction kettle, heat up to 95°C, stir and polymerize at a rota...

Embodiment 2

[0046] A preparation method of vinyl silicone oil, comprising the following steps:

[0047] (1) Dehydration section: put DMC (see Table 2 for consumption) into the reaction kettle, then heat up to 70°C, turn on the vacuum, keep the vacuum at -0.15Mpa, and dehydrate for 2h;

[0048] (2) Preparation of alkaline glue: add octamethylcyclotetrasiloxane (see Table 2 for the amount) to the flask, cool the system to 5°C, turn on the vacuum, and feed dry nitrogen for 1 h; tetramethylammonium hydroxide pentahydrate (consumption is shown in Table 2) add in the flask, continue to open the vacuum, feed dry nitrogen for 2h, then reduce the nitrogen ventilation speed and vacuum strength, slowly heat up, and dehydrate to obtain alkali glue;

[0049](3) Equilibrium chemical section: put the alkali glue, vinyl double end caps and vinyl ring bodies (see Table 2 for the amount) into the reaction kettle, heat up to 105°C, and stir and polymerize at a rotational speed of 120r / min for 3h to obtain a...

Embodiment 3

[0054] A preparation method of vinyl silicone oil, comprising the following steps:

[0055] (1) Dehydration section: put DMC (see Table 2 for the amount) into the reaction kettle, then heat up to 68°C, turn on the vacuum, keep the degree of vacuum at -0.10Mpa, and dehydrate for 1.5h;

[0056] (2) Preparation of alkaline glue: add octamethylcyclotetrasiloxane (see Table 2 for the amount) to the flask, cool the system to 4°C, turn on the vacuum, and feed dry nitrogen for 0.5h; tetramethyl pentahydrate is hydrogenated Ammonium (see Table 2 for consumption) was added to the flask, the vacuum was continued to be opened, and dry nitrogen was introduced for 2h, and then the nitrogen ventilation speed and vacuum strength were reduced, the temperature was slowly heated, and dehydrated to obtain alkaline glue;

[0057] (3) Equilibrium chemical section: put the alkali glue, vinyl double end cap and vinyl ring body (see Table 2 for the amount) into the reaction kettle, heat up to 100 ° C,...

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Abstract

The invention relates to the field of vinyl silicone oil, and particularly discloses a preparation method of vinyl silicone oil, which comprises the following steps: (1) dehydration section; (2) preparing alkali glue; (3) a balancing section; (4) a medium breaking section; (5) vacuum section; and (6) discharging. The method has the effects of reducing the production cost of the vinyl silicone oil and improving the yield of the prepared vinyl silicone oil.

Description

technical field [0001] The present application relates to the field of vinyl silicone oil, more specifically, it relates to a preparation method of vinyl silicone oil. Background technique [0002] Vinyl silicone oil mainly includes vinyl-terminated polydimethylsiloxane (Vi-PDMS) and vinyl-terminated polymethylvinylsiloxane (Vi-PMVS), and can provide products with different viscosities and vinyl content according to needs . Vinyl silicone oil is mainly used as an additive for addition-type silicone rubber to enhance the strength and hardness of silicone rubber; it can also be used to make liquid silicone rubber; and it can react with various organic materials such as polyurethane and acrylic to make better performance. new material. [0003] At present, the synthetic vinyl silicone oil generally uses methyl cyclosiloxane and methyl vinyl cyclosiloxane as raw materials, and vinyl siloxane as the end-capping agent. The product obtained in this way not only has a low yield, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/20C08G77/08
CPCC08G77/20C08G77/08
Inventor 王海平
Owner 广东新硅源新材料科技有限公司
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