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An alkyl polyether co-modified polysiloxane and its continuous synthesis device and method

A technology of polysiloxane and alkyl polyether, applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physicochemical processes, etc. Low efficiency and other problems, to achieve the effect of preventing flying temperature, less by-products, and strong heat transfer capacity

Active Publication Date: 2022-04-08
JIANGSU MAYSTA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the synthesis process of the above-mentioned organosilicon copolymer, due to the low solubility between hydrogen-containing polysiloxane and olefin and allyl polyether in the actual reaction, the reactants in the initial reaction system are in a liquid-liquid heterogeneous state, and the mass transfer Poor effect, low reaction efficiency, many by-products
In addition, the heat release is severe during the reaction between long-chain olefins and hydrogen-containing polysiloxane, especially when there are more hydrogens on the main chain side of the polysiloxane.
The traditional tank-type stirred reactor has a small heat transfer area and low heat transfer capacity, which determines that its stable temperature control effect is poor, resulting in the phenomenon of "flying temperature" and poor safety.

Method used

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  • An alkyl polyether co-modified polysiloxane and its continuous synthesis device and method
  • An alkyl polyether co-modified polysiloxane and its continuous synthesis device and method
  • An alkyl polyether co-modified polysiloxane and its continuous synthesis device and method

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Embodiment 1

[0089] The application provides a method for continuous synthesis of polysiloxane co-modified by alkyl polyether, which adopts such as figure 2 The device 100 for the continuous synthesis of the polysiloxane co-modified by the alkyl polyether shown in the figure carries out the synthesis reaction, specifically:

[0090] (1) Add 281.52g of octamethylcyclotetrasiloxane, 138.75g of high hydrogen-containing silicone oil, 79.73g of hexamethyldisiloxane and 15g of acidic catalyst into a three-necked flask, heat up to 60°C, and wait for the temperature to stabilize Afterwards, heat-retain and react for 8 hours to obtain hydrogen-containing polysiloxane.

[0091] (2) With the microchannel system as the reactor, the channel structure is matched as (wherein, the structure of the preheating pipeline 131 is as follows image 3 As shown, the structure of the mixing pipeline 132 is as Figure 4 shown). Set the preheating temperature and reaction temperature to 110° C., and the reaction ...

Embodiment 2

[0093] The application provides a method for continuous synthesis of polysiloxane co-modified by alkyl polyether, which adopts such as figure 2 The device 100 for the continuous synthesis of the polysiloxane co-modified by the alkyl polyether shown in the figure carries out the synthesis reaction, specifically:

[0094] (1) Add 243.42g of octamethylcyclotetrasiloxane, 131.22g of high hydrogen-containing silicone oil, 125.36g of hexamethyldisiloxane and 20g of acidic catalyst into a three-necked flask, heat up to 60°C, and wait for the temperature to stabilize Afterwards, heat-retain and react for 8 hours to obtain hydrogen-containing polysiloxane.

[0095] (2) With the microchannel system as the reactor, the channel structure is matched as (wherein, the structure of the preheating pipeline 131 is as follows image 3 As shown, the structure of the mixing pipeline 132 is as Figure 5 shown). Set the preheating temperature and reaction temperature to 130° C., and the reaction...

Embodiment 3

[0099] The application provides a method for continuous synthesis of polysiloxane co-modified by alkyl polyether, which adopts such as figure 2 The device 100 for the continuous synthesis of the polysiloxane co-modified by the alkyl polyether shown in the figure carries out the synthesis reaction, specifically:

[0100] (1) Add 267.41g of octamethylcyclotetrasiloxane, 134.19g of high hydrogen-containing silicone oil, 98.4g of hexamethyldisiloxane and 16g of acidic catalyst into a three-necked flask, heat up to 60°C, and wait for the temperature to stabilize Afterwards, heat-retain and react for 8 hours to obtain hydrogen-containing polysiloxane.

[0101] (2) With the microchannel system as the reactor, the channel structure is matched as (wherein, the structure of the preheating pipeline 131 is as follows image 3 As shown, the structure of the mixing pipeline 132 is as Figure 6 shown). Set the preheating temperature and reaction temperature to 120° C., and the reaction p...

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Abstract

The invention discloses polysiloxane co-modified by alkyl polyether and its continuous synthesis device and method, and relates to the technical field of preparation technology of organosilicon polyether copolymer. The device includes a microchannel reactor and a tank reactor, wherein the microchannel reactor includes a preheating pipeline and a mixing pipeline communicated with the preheating pipeline, and the mixing pipeline communicates with the tank reactor. The device can effectively solve the mass transfer problem at the initial stage of the synthesis reaction of the alkyl polyether co-modified polysiloxane, so that the liquid-liquid heterogeneous reaction liquid is fully mixed, and the selectivity of the product is improved. At the same time, the reaction temperature and reaction time can be precisely controlled to prevent the occurrence of "flying temperature" phenomenon and the generation of by-products during the synthesis process, and improve the safety of production. The method provided by the present application uses the above-mentioned device for synthesis, which can realize continuous operation, effectively shorten the reaction time, shorten the production cycle, make the reaction process more stable, and significantly improve the reaction efficiency.

Description

technical field [0001] The invention relates to the technical field of preparation technology of silicone polyether copolymers, in particular to a polysiloxane co-modified by alkyl polyether and its continuous synthesis device and method. Background technique [0002] Polyether-modified polysiloxane is a kind of high-efficiency surfactant. It uses hydrophobic polysiloxane as the main chain, and the side chain is grafted and modified with hydrophilic polyether to endow polysiloxane with Being water-soluble, it not only maintains the properties of polysiloxane such as heat resistance, viscosity-temperature property, and low surface tension, but also has the advantages of smoothness, antistatic property, and emulsification stability. In the polysiloxane modification process, the hydrophilic and lipophilic properties can be effectively adjusted by adjusting the type, quantity and position of the polyether introduced; in addition, the emulsifier can be further improved by introdu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/18B01J19/00C08G77/46
CPCB01J19/18B01J19/006B01J19/0013C08G77/46B01J2219/00081
Inventor 王伟伟唐雄峰黄登登
Owner JIANGSU MAYSTA CHEM
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