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Preparation method for acrylonitrile/methacrylic acid copolymer foamed plastic

A technology of methacrylic acid and foamed plastics, applied in the field of foamed plastics preparation, can solve the problems of low production efficiency, unstable performance, low product yield and the like, and achieves the effects of improving output, uniform performance and increasing polymerization reaction temperature

Active Publication Date: 2013-12-04
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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  • Preparation method for acrylonitrile/methacrylic acid copolymer foamed plastic
  • Preparation method for acrylonitrile/methacrylic acid copolymer foamed plastic

Examples

Experimental program
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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 preparation method for acrylonitrile / methacrylic acid copolymer foamed plastic. The preparation method comprises the following steps: adding deionized water, a suspending agent and an aqueous phase inhibitor into a reactor, and uniformly agitating; uniformly mixing monosomic acrylonitrile, methacrylic acid and an initiator, adding the mixture into the reactor, agitating the mixture at the room temperature so as to obtain a stable suspension, rising the temperature to a reaction temperature, and performing free radical suspension polymerization under the condition of agitation; drying a slurry-shaped mixture obtained after the reaction; uniformly mixing copolymer powder, a carbamide foaming agent and a bismaleimide (BMI) crosslinking agent which are obtained after drying; performing hot-pressing foaming formation of the mixture, and otaining polymethacrylimide foamed plastic via heat treatment. The technical scheme provided by the invention is high in production efficiency and yield, can obtain a product with stable performance, is simple and convenient to operate and environmental-friendly, and realizes a beneficial implement effect.

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 ...

Claims

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Application Information

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Patent Type & Authority Applications(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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