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A kind of preparation method of acrylonitrile/methacrylic acid copolymer foamed plastics

A technology of methacrylic acid and foamed plastics, which is applied in the field of foamed plastics preparation, can solve problems such as low production efficiency, unstable performance, and low product yield, and achieve the effects of increased output, uniform performance, and increased polymerization reaction temperature

Active Publication Date: 2016-02-17
HAOBO FUJIAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to overcome the shortcomings of complex operation, low production efficiency, low product yield and unstable performance in the prior art, the present invention provides a kind of product with high production efficiency and yield, stable product performance, easy operation and environmental friendliness The preparation method of the polymethacrylimide foamed plastic

Method used

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  • A kind of preparation method of acrylonitrile/methacrylic acid copolymer foamed plastics
  • A kind of preparation method of acrylonitrile/methacrylic acid copolymer foamed plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of acrylonitrile / methacrylic acid copolymer foamed plastics of the present invention, it can be obtained by following component mixing reaction:

[0040] The mass ratio of monomer: acrylonitrile to methacrylic acid is 40:60.

[0041] Dispersion medium: The ratio of the mass of deionized water to the total mass of the monomer is 2:1; the amount of suspending agent PVA1788 is 0.1% of the mass of deionized water.

[0042] Aqueous phase polymerization inhibitor: methylene blue, the dosage is 0.001% of the total mass of monomers.

[0043] Initiator: azobisisobutyronitrile (AIBN), the dosage is 1% of the total mass of monomers.

[0044] Foaming agent: carbonamide, the dosage is 6% of the total mass of monomers.

[0045] Cross-linking agent: BMI, the dosage is 1% of the total mass of monomers.

[0046] The preparation method of above-mentioned acrylonitrile / methacrylic acid copolymer foamed plastics, it adopts following steps to carry out successively:

[0047] (1) ...

Embodiment 2

[0053] A kind of acrylonitrile / methacrylic acid copolymer foamed plastics of the present invention, it can be obtained by following component mixing reaction:

[0054] The mass ratio of monomer: acrylonitrile to methacrylic acid is 45:55.

[0055] Dispersion medium: The ratio of the mass of deionized water to the total mass of the monomer is 2.5:1; the amount of suspending agent PVA1788 is 0.3% of the mass of deionized water.

[0056] Aqueous phase polymerization inhibitor: tin chloride, the dosage is 0.003% of the total mass of monomers.

[0057] Initiator: azobisisoheptanonitrile (ADVN), the dosage is 2% of the total mass of monomers.

[0058] Foaming agent: carbonamide, the dosage is 7% of the total mass of monomers.

[0059] Cross-linking agent: BMI, the dosage is 2% of the total mass of monomers.

[0060] The preparation method of above-mentioned acrylonitrile / methacrylic acid copolymer foamed plastics, it adopts following steps to carry out successively:

[0061] (1)...

Embodiment 3

[0067] A kind of acrylonitrile / methacrylic acid copolymer foamed plastics of the present invention, it can be obtained by following component mixing reaction:

[0068] The mass ratio of monomer: acrylonitrile to methacrylic acid is 50:50.

[0069] Dispersion medium: The ratio of the mass of deionized water to the total mass of the monomer is 3:1; the amount of suspending agent PVA1788 is 0.5% of the mass of deionized water.

[0070] Aqueous phase polymerization inhibitor: hydroquinone, the dosage is 0.05% of the total mass of monomers.

[0071] Initiator: benzoyl peroxide (BPO), the dosage is 3% of the total mass of monomers.

[0072] Foaming agent: carbonamide, the dosage is 8% of the total mass of monomers.

[0073] Cross-linking agent: BMI, the dosage is 3% of the total mass of monomers.

[0074] The preparation method of above-mentioned acrylonitrile / methacrylic acid copolymer foamed plastics, it adopts following steps to carry out successively:

[0075] (1) Add deioni...

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Abstract

The invention discloses a method for preparing an acrylonitrile / methacrylic acid copolymer foam plastic, which comprises the following steps: adding deionized water, a suspending agent and a water-phase polymerization inhibitor into a reaction vessel, and stirring evenly; After the nitrile, methacrylic acid and initiator are mixed evenly, add to the reaction vessel, and stir at room temperature to obtain a stable suspension, heat up to the reaction temperature, and carry out free radical suspension polymerization reaction under the condition of stirring again; the slurry obtained after the reaction The mixture is dried; after drying, the obtained copolymer powder, carbonamide foaming agent, and bismaleimide (BMI) crosslinking agent are mixed evenly; the obtained mixture is hot-pressed and foamed, and heat-treated to obtain polymethacrylic Amine foam. The technical scheme of the invention has high production efficiency, high yield, stable product performance, simple and convenient operation, and environmental friendliness, thereby obtaining beneficial implementation effects.

Description

technical field [0001] The invention relates to a method for preparing foamed plastics, in particular to a method for preparing acrylonitrile / methacrylic acid copolymer foamed plastics. Background technique [0002] Polymethacrylimide (PMI) foam is a high-performance foam with acrylonitrile / methacrylic acid or methacrylonitrile / methacrylic acid copolymer as the matrix resin. Since the price of methacrylonitrile is more than 10 times that of acrylonitrile, various manufacturers are currently developing industrial production methods for acrylonitrile / methacrylic acid copolymers. Under the same density, PMI foam is currently the foam with the highest strength and stiffness, and it also has excellent heat resistance and creep resistance. PMI foam was first successfully developed by German company Degussa in 1972, and has developed a number of product series with different uses and performances. High-performance sandwich structure composites prepared with high-performance PMI f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/08C08J3/24C08F220/06C08F220/46
Inventor 张竞徐体寿吴毅炳邹俊汤继俊朱治愿
Owner HAOBO FUJIAN NEW MATERIAL TECH
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