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Whisker modified polymethacrylimide foamed plastic and preparation method thereof

A technology of polymethacrylimide and foamed plastics, which is applied in the field of whisker-modified polymethacrylimide foamed plastics and its preparation, can solve the problems of difficulty in realizing enlarged production, loss of performance, etc., and achieves a reduction in flammability The effect of reducing smoke density and improving mechanical properties

Inactive Publication Date: 2011-05-11
湖南兆恒材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the above-mentioned modification methods for polymethacrylimide foam are difficult to realize large-scale production, and although some have obvious improvements to their single performance, they lose other performances

Method used

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  • Whisker modified polymethacrylimide foamed plastic and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] Whisker modified polymethacrylimide foamed plastics of the present invention, it is to adopt following raw materials to make by weight ratio:

[0046] 60 parts of methacrylic acid

[0047] 40 parts of methacrylonitrile

[0048] 1 part magnesium salt whiskers

[0049] Thixotropic agent polymethyl methacrylate 2 parts

[0050] Nucleating agent silicon dioxide 0.1 part

[0051] Initiator dibenzoyl peroxide 0.1 parts

[0052] Initiator peroxy-2-ethyl-hexanoic acid tert-butyl ester 0.05 parts

[0053] Foaming agent formamide 0.1 part

[0054] Cross-linking agent allyl acrylate 0.1 parts

[0055] Retarder benzoquinone 0.01 parts

[0056] The preparation method of whisker modified polymethacrylimide foam plastic of the present invention, comprises the steps:

[0057] (1) The above-mentioned raw materials are weighed according to the above-mentioned specific gravity, mixed at a high speed at normal temperature, and the dispersion of the magnesium salt whiskers is streng...

Embodiment 2

[0062] Whisker modified polymethacrylimide foamed plastics of the present invention, it is to adopt following raw materials to make by weight ratio:

[0063] Acrylic 30 parts

[0064] 70 parts of methacrylonitrile

[0065] Silicon carbide whiskers 0.1 parts

[0066] Thixotropic polyamide wax 2 parts

[0067] Nucleating agent tert-butyl acrylate 1 part

[0068] Initiator azobisisobutyronitrile (AIBN) 0.05 parts

[0069] Foaming agent isopropyl alcohol 2 parts

[0070] Cross-linking agent allyl methacrylamide 1 part

[0071] 0.07 part of retarder anisole peroxide

[0072] The preparation method of whisker modified polymethacrylimide foam plastic of the present invention, comprises the steps:

[0073] (1) The above-mentioned raw materials are weighed according to measurement, mixed at a high speed at room temperature, and the dispersion of the whisker material is strengthened by power ultrasonic waves, and the whisker material is surface-activated by a titanate coupling ag...

Embodiment 3

[0078] Whisker modified polymethacrylimide foamed plastics of the present invention, it is to adopt following raw materials to make by weight ratio:

[0079] 70 parts of methacrylic acid

[0080] Acrylonitrile 30 parts

[0081] Calcium Sulfate Whiskers 10 parts

[0082] Thixotropic agent hydrogenated castor oil 0.1 parts

[0083] Nucleating agent zinc sulfide 2 parts

[0084] Initiator peroxy-2-ethyl-hexanoic acid tert-butyl ester 2 parts

[0085] Foaming agent oxalic acid 4 parts

[0086] Cross-linking agent magnesium oxide 0.01 parts

[0087] Retarder hydroquinone 0.04 parts

[0088] The preparation method of whisker modified polymethacrylimide foam plastic of the present invention, comprises the steps:

[0089] (1) The above-mentioned raw materials are weighed according to measurement, mixed at a high speed at normal temperature, and the dispersion of the whisker material is strengthened by power ultrasonic waves, and the whisker material is surface-activated by an a...

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Abstract

The invention relates to whisker modified polymethacrylimide foamed plastic, which is prepared from the following raw materials in part by weight: 30 to 70 parts of acrylic acid or methacrylic acid, 30 to 70 parts of acrylonitrile or methacrylonitrile, 0.1 to 20 parts of whisker material, 0.1 to 5 parts of thixotropic agent, 0.1 to 6 parts of nucleating agent, 0.05 to 2 parts of initiator, 0.1 to 15 parts of foaming agent, 0.01 to 2 parts of cross-linking agent and 0.01 to 0.7 part of retarding agent. The invention also relates to a preparation method of the foamed plastic, which comprises the following steps of: (1) mixing the raw materials; (2) performing polymerization reaction on the materials obtained in the step (1); (3) heating a plate prepared in the step (2), and preheating and foaming; and (4) heating the foamed plate prepared in the step (3). The combustibility and smoke density of the foamed plastic are reduced, and the foamed plastic is a plastic material with high performance.

Description

technical field [0001] The invention relates to a high-performance polymer foam and a preparation method thereof, in particular to a whisker-modified polymethacrylimide foam and a preparation method thereof. Background technique [0002] Polymethacrylimide (PMI) foam was first invented by Dr. Schrder in Germany in 1961 and produced by Rhm and Hass GmbH in Darmstadt, Germany. PMI foam is a cross-linked, 100% closed-cell foam with uniform pore size distribution, which has excellent structural stability and high mechanical strength. PMI foam processing is very convenient. Wood cutting tools can be used for cutting and planing, and PMI foam can also be thermoformed into complex shapes to meet the requirements of complex workpieces for foam shapes. At the same time, PMI has excellent solvent resistance. Among all foams, PMI foam has the highest strength and stiffness when compared under the same density conditions. Therefore, PMI foam has clear advantages in weight design and o...

Claims

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Application Information

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IPC IPC(8): C08L33/02C08L33/20C08L33/22C08K13/06C08K9/06C08K9/04C08K7/08C08K7/10C08K7/06C08J9/04C08F220/06C08F220/46C08F220/50C08F2/44
Inventor 杨勇马晓雄何斌
Owner 湖南兆恒材料科技有限公司
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