Preparation method and application of high-tenacity foam material

A foam material and high toughness technology, applied in the field of preparation of foam core materials, can solve problems such as brittle large surface pulverization, affecting the application range, etc., achieve the effect of reducing thermal deformation temperature and increasing elongation at break

Active Publication Date: 2015-09-30
句容市育达实业投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, although polymethacrylimide foam has the above-mentioned advantages, it still has high brittleness and surface pulverization, which affects its application range.

Method used

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  • Preparation method and application of high-tenacity foam material
  • Preparation method and application of high-tenacity foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Raw material ratio is:

[0019] 50g of methacrylic acid, 50g of methacrylonitrile, 10g of silicone rubber core-shell toughened CSR composite resin, 7g of magnesium oxide, 10g of mixed blowing agent (isopropanol:formamide=1:1), initiator mixture (peroxide Benzoyl: talc = 1:3) 0.7g, maleimide 3g, carboxamide 5g.

[0020] The operation steps are:

[0021] Step 1, the two glass plates are sealed with a rubber strip to form a mold cavity;

[0022] Step 2, according to the above formula, mix methacrylic acid, methacrylonitrile and silicone rubber core-shell toughened CSR composite resin, and add magnesium oxide to it to completely dissolve the magnesium oxide;

[0023] Step 3, then add the mixed foaming agent, initiator mixture, maleimide and carbonamide, stir, mix evenly, and inject into the mold cavity;

[0024] Step 4, polymerizing for 50 hours at a temperature of 45°C in a water bath to form a foam precursor copolymerized plate;

[0025] Step 5: Preheat the foam precu...

Embodiment 2

[0029] The ratio of raw materials is: 40g of methacrylic acid, 40g of methacrylonitrile, 1g of silicone rubber core-shell toughened CSR composite resin, 3g of magnesium oxide, 5g of mixed foaming agent (isopropanol: formamide = 1:1), initiator Agent mixture (benzoyl peroxide: talc = 1:3) 0.1 g, maleimide 0.5 g, carboxamide 0.3 g.

[0030] Operation steps are identical with embodiment 1.

[0031] Test result: the high tenacity polymethacrylimide foam material that this embodiment makes, density 65Kg / m 3 , the tensile strength is 2.5MPa, the elongation at break is 5%, and the heat distortion temperature is 189°C.

Embodiment 3

[0033] 60g of methacrylic acid, 60g of methacrylonitrile, 20g of silicone rubber core-shell toughened CSR composite resin, 7g of magnesium oxide, 16g of mixed blowing agent (isopropanol:formamide=1:1), initiator mixture (peroxide Benzoyl: talc = 1:3) 1g, maleimide 3g, carboxamide 10g.

[0034] Operation steps are identical with embodiment 1.

[0035] Test result: the high tenacity polymethacrylimide foam material that this embodiment makes, density 60Kg / m 3 , the tensile strength is 2.2MPa, the elongation at break is 4.5%, and the heat distortion temperature is 189°C.

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Abstract

The invention discloses a preparation method of a high-tenacity foam material. The method includes the steps that 1, two glass plates are sealed through rubber strips to form a mold cavity; 2, methacrylic acid, methacrylonitrile and core-shell rubber are mixed, and magnesium oxide is added into the mixture and completely dissolved; 3, a mixed foaming agent, an initiating agent mixture, maleimide and carbamide are added, stirred and mixed evenly to be injected into the mold cavity; 4, a polymerization reaction is performed for 40 h-60 h under the bath temperature of 30 DEG C-50 DEG C to form a foam presoma copolymer board; 5, the foam presoma copolymer board is placed under the temperature of 130 DEG C-180 DEG C to be preheated for 2 h-5 h, foamed for 30 min-90 min under the temperature of 180 DEG C-230 DEG C and then subjected to heat treatment for 1 h-3 h under the temperature of 130 DEG C-180 DEG C, and then the high-tenacity foam material can be obtained. By the adoption of the core-shell rubber tenacity-increasing PMI foam material, the breaking elongation of PMI foams can be effectively increased, but the heat deformation temperature is not obviously decreased. A new means is provided for studying the PMI foam material and improving performance.

Description

technical field [0001] The invention relates to a preparation method of a foam core material, in particular to a preparation method and application of a high-toughness foam material Background technique [0002] Polymethacrylimide (PMI) foam is a cross-linked rigid structural foam material with 100% closed-cell structure, and its uniform cross-linked cell wall structure can endow it with outstanding structural stability and excellent mechanical properties. Under the condition of the same density, PMI foam has higher compressive strength and rigidity than other polymer foam materials, more excellent high temperature and humidity resistance, and better high temperature creep resistance and dimensional stability. Outstanding heat resistance and excellent creep resistance at high temperatures enable it to withstand the high temperature curing process conditions of carbon fiber / epoxy, carbon fiber / Shuangma and other resin composite materials, and can realize the one-time co-curi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/50C08J9/10C08J9/04C08L33/02C08L33/22C08L83/04
Inventor 鲁平才焦自保赵钎
Owner 句容市育达实业投资有限公司
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