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Method for reducing surface fusion and surface adhesion of high internal phase emulsion in polymerization process

A technology of surface adhesion and polymer materials, which is applied in the field of reducing surface fusion and surface adhesion of high internal phase emulsions during the polymerization process, and can solve problems such as uneven pore size of porous polymers and unqualified polymerization degree

Active Publication Date: 2022-03-25
苏州星日化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Further, the present invention deposits the HIPE on the conveying equipment, and applies the water phase containing the reducing agent before and after the HIPE deposition site; then polymerizes to obtain a foam material (porous polymer), due to the realization of preventing HIPE surface fusion and surface adhesion Attached, it solves the problems of non-uniform porous polymer pore size and non-conformity of polymerization degree existing in the prior art

Method used

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  • Method for reducing surface fusion and surface adhesion of high internal phase emulsion in polymerization process
  • Method for reducing surface fusion and surface adhesion of high internal phase emulsion in polymerization process
  • Method for reducing surface fusion and surface adhesion of high internal phase emulsion in polymerization process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: Preparation of HIPE and preparation of foam from HIPE

[0062] For the preparation of HIPE, the water phase, oil phase and initiator phase contained the components shown in Table 1 below.

[0063] Table I:

[0064]

[0065] HIPE preparation. Follow the attached figure 1 As shown in the process flow, start the HIPE emulsification equipment. Composed of static mixer A (static mixer type Model GX, element combination 35.5*24+26.4*36, that is, 24 elements with a diameter of 35.5mm and 36 elements with a diameter of 26.4mm in series) and pump A (Herold WK- Pumps, three-bladed helical rotor) and their supporting pipelines (the pipeline includes temperature measuring points, pressure measuring points, and flow measuring points) constitute the first circulation pipeline. The water phase was continuously pumped through the shell and tube heat exchanger at a flow rate of 8100 g / min, the temperature of the water phase was controlled at about 80 °C, and delivered t...

Embodiment 2~5

[0067] Embodiment 2~5 and comparative example 1~5:

[0068] The variables of each embodiment and comparative example are adjusted as described in Table 2, and the raw materials are the same as in Example 1; the implementation effects of Examples 1-5 and Comparative Examples 1-5 are shown in Table 3.

[0069] Table 2 Variable adjustment and implementation effect of Examples 1-5 and Comparative Examples 1-5

[0070]

[0071] Table 3 Implementation Effects of Embodiments 1 to 5 and Comparative Examples 1 to 5

[0072]

[0073] By comparing the examples with the comparative examples, it can be seen that the application of an aqueous reducing agent solution can effectively inhibit surface fusion and surface adhesion. In addition, the tensile strength of the polymer is routinely tested. In Examples 2 to 4, the polymer tensile strength obtained in Example 4 The tensile strength is the highest, being respectively 1.2 times of that of Example 2 and 1.35 times of that of Example ...

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Abstract

The invention relates to a method for reducing surface fusion and surface adhesion of HIPE (high internal phase emulsion) in a polymerization process during production of HIPE foam by a continuous method, which comprises the following steps: depositing HIPE on conveying equipment, and simultaneously applying a water phase containing a reducing agent before and after the HIPE deposition position; and then polymerization is carried out, so that HIPE surface fusion and surface adhesion are prevented. For the lower surface of the HIPE in the prior art, the temperature of the high internal phase emulsion is higher than that of a deposition area conveyor belt, so that the temperature of the lower surface of the high internal phase emulsion after deposition is rapidly reduced, the polymerization rate of the lower surface of the HIPE is greatly reduced, and the internal phase is fused to different degrees in a polymerization curing furnace, so that the problems are solved for the first time. The surface fusion and the surface adhesion of the HIPE in the polymerization process are reduced.

Description

technical field [0001] This application relates to a method for reducing the surface fusion and surface adhesion of HIPE during the polymerization process of high internal phase emulsion (HIPE) foam produced by continuous method. Background technique [0002] High internal phase emulsion refers to an emulsion in which the ratio (W / O ratio) of the water phase as the dispersed phase (internal phase) to the oil phase as the external phase is 3 / 1 or more, hereinafter referred to as HIPE. The use of such HIPE polymerizations to make porous polymers is well known. Compared with the porous polymer produced by using a blowing agent, the porous polymer produced by HIPE polymerization can obtain a continuous open-cell foam with fine pore size (hereinafter also referred to as HIPE method). After the HIPE is formed, the HIPE can be distributed on conveying equipment, such as a belt, by a distributor, and moved to a polymerization reactor to complete the polymerization reaction, thereby...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F222/14C08F2/22C08F2/30C08J9/00C08L33/08
CPCC08F220/1808C08F2/28C08F2/30C08J9/00C08J2333/08C08F220/1811C08F222/102
Inventor 顾子旭罗超苏卫卫杭渊刘旭
Owner 苏州星日化学有限公司
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