Polymethacrylimide foam plastic and preparation method thereof

A polymethacrylimide and foamed plastic technology, which is applied in the chemical industry and can solve the problems such as the inability of the polymethacrylimide foamed plastic to degrade.

Inactive Publication Date: 2017-12-01
株洲觅渔渔具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a polymethacrylimide foam and its preparation method, aiming to solve the problem that the existing polymethacrylimide foam cannot be degraded

Method used

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Examples

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preparation example Construction

[0040] In addition, the present invention also provides a kind of preparation method of above-mentioned polymethacrylimide foamed plastics, comprises steps:

[0041] S1. Mix the raw materials to obtain initial materials.

[0042] The main ingredients in this embodiment are methacrylic acid and methacrylonitrile. During the production process, the main ingredients are fully mixed with other various additives. It should be understood that in this example, the various raw materials should be fully mixed to make them evenly distributed, so that the reaction can be more complete, which can be achieved by prolonging the mixing time or increasing the stirring speed. It should be understood that the specific equipment used and For the mixing method, reference can be made to the existing and improved mixing equipment and methods, which are not the invention point of the present invention, so details are not repeated here.

[0043] S2. Pour the initial material into a closed container,...

Embodiment 1

[0050] Main ingredients: 55 parts of methacrylic acid, 25 parts of methacrylonitrile;

[0051] Foaming agent: AC, 0.5 part;

[0052] Initiator: benzoyl peroxide, 0.8 part;

[0053] Nucleating agent: sodium phenylphosphate, 0.02 parts;

[0054] Coupling agent: KH-550, 0.01 parts;

[0055] Pre-recovery agent: CPE, 1 part;

[0056] Concrete preparation steps include:

[0057] Step 1, weighing the above-mentioned raw materials according to the above-mentioned ratio, mixing, and stirring evenly to obtain the initial material;

[0058] Step 2, inject the initial material obtained in step 1 into a closed container, and then place the closed container in a water bath for polymerization to obtain a foam matrix, wherein the temperature of the water bath is controlled at 32 degrees Celsius, and the polymerization reaction time is 20 hours;

[0059] Step 3. Preheat the foam base prepared in step 2 in an air oven at 160 degrees Celsius for 0.5 hours, then foam at 200 degrees Celsius f...

Embodiment 2

[0061] Main ingredients: 75 parts of methacrylic acid, 45 parts of methacrylonitrile;

[0062] Foaming agent: DPT, 3 parts;

[0063] Initiator: dicyclohexyl peroxydicarbonate, 2 parts;

[0064] Nucleating agent: sodium phenylphosphate, 1 part;

[0065] Coupling agent: A-172, 2 parts;

[0066] Pre-recovery agent: EEP, 2 parts;

[0067] Concrete preparation steps include:

[0068] Step 1, weighing the above-mentioned raw materials according to the above-mentioned ratio, mixing, and stirring evenly to obtain the initial material;

[0069] Step 2, inject the initial material obtained in step 1 into a closed container, and then place the closed container in an oil bath for polymerization to obtain a foam matrix, wherein the temperature of the oil bath is controlled at 47 degrees Celsius, and the polymerization reaction time is 55 hours;

[0070] Step 3. Preheat the foam base prepared in step 2 in an air oven at 190 degrees Celsius for 5 hours, then foam at 240 degrees Celsius fo...

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PUM

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Abstract

The invention provides a polymethacrylimide foam plastic which comprises methacrylic acid, methacrylonitrile, a foaming agent, an initiator, a nucleating agent, a coupling reagent and a pre-recovery agent, wherein the pre-recovery agent is selected from at least one of chlorinated polyethylene and ethyl3-ethoxypropionate. The invention further provides a preparation method of polymethacrylimide foam plastic. According to polymethacrylimide foam plastic provided by the embodiment of the invention, chlorinated polyethylene and ethyl 3-ethoxypropionate are added in the raw materials as the pre-recover agent, and due to existence of the pre-recover agent during production process, free radicals are formed nearby amino (-C-NH-C-) of the polymethacrylimide foam plastic during the reaction. During the recovering of the polymethacrylimide foam plastic, amino can be hydrolyzed into -CN and -COOH, so that high-molecule chain of the polymethacrylimide foam plastic can be broken into small molecules, so that the degradation of the material can be realized.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a polymethacrylimide foam plastic and a preparation method thereof. Background technique [0002] Polymethacrylimide (PMI) foam is a commonly used foam. However, like other plastics, when polymethacrylimide foam is used and discarded, it is difficult to degrade naturally and eventually forms white pollution. pollute the environment. Contents of the invention [0003] The main purpose of the present invention is to provide a polymethacrylimide foam and its preparation method, aiming to solve the problem that the existing polymethacrylimide foam cannot be degraded. [0004] In order to achieve the above object, the polymethacrylimide foam that the present invention proposes comprises the following raw materials in parts by weight: [0005] 55-75 parts of methacrylic acid; [0006] 25-45 parts of methacrylonitrile; [0007] 0.5-3 parts of foaming agent; [0008] 0.8-2 parts o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/46C08L33/02C08L23/28C08K5/101
CPCC08F220/06C08K5/101C08L33/02C08L2203/14C08F220/46C08L23/286
Inventor 陈小龙崔科何建平
Owner 株洲觅渔渔具有限公司
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