A kind of benzoxazine nitrile-based resin sandwich structure foam and preparation method thereof

A benzoxazine nitrile-based resin technology, applied in the field of polymer foam, can solve the problems such as the preparation method of nitrile-based resin sandwich structure foam, and achieve the effects of broad industrial application prospect, convenient equipment and wide application range

Active Publication Date: 2022-03-29
CHENGDU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the preparation method of the polymer foam of the nitrile-based resin, and there is no preparation method of the sandwich structure foam of the nitrile-based resin containing a benzoxazine ring.

Method used

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  • A kind of benzoxazine nitrile-based resin sandwich structure foam and preparation method thereof
  • A kind of benzoxazine nitrile-based resin sandwich structure foam and preparation method thereof
  • A kind of benzoxazine nitrile-based resin sandwich structure foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Bisphenol A type nitrile resin sandwich structure foam containing benzoxazine ring: (1) mixing and drying: at room temperature, Tween-80 (2.5g) was added to deionized water (20g), and then added Azodicarbonamide (0.25g) and bisphenol A type nitrile resin (22.5g) containing benzoxazine rings were mixed for 30min under mechanical stirring (200r / min) and ultrasonic (100W) to obtain a viscous The liquid was then transferred to a watch glass and dried at 80°C / 12h to obtain a golden yellow powder. (2) Overturning and foaming: put the above powder in a mold and foam at 150°C for 2 hours. During the foaming process, turn the mold up and down once every 2 minutes. (3) Static curing: 200°C / 1h; 250°C / 1h for curing; after cooling and demoulding, a bisphenol A-type nitrile resin sandwich structure foam containing a benzoxazine ring is obtained.

Embodiment 2

[0046] Bisphenol A type nitrile resin sandwich structure foam containing benzoxazine ring: (1) mixing and drying: at room temperature, Tween-60 (0.2g) was added to deionized water / ethanol (5g / 5g) Add azodicarbonamide (0.1g) and bisphenol A-type nitrile resin (9.8g) containing benzoxazine rings, place in a ball mill and grind and mix for 8 hours to obtain a paste-like liquid, then transfer Transfer to a watch glass and dry at 60°C / 12h to obtain a golden yellow powder. (2) Overturning and foaming: the above powder is placed in a cylindrical mold and foamed at 200°C for 0.5h. During the foaming process, the mold is turned over once every 3 minutes. (3) Static solidification: solidify at 240° C. / 1 h; after cooling and demolding, a bisphenol A-type nitrile-based resin sandwich structure foam containing a benzoxazine ring is obtained.

Embodiment 3

[0048] Bisphenol A type nitrile resin sandwich structure foam containing benzoxazine ring: (1) mixing and drying: at room temperature, Tween-40 (1.2g) was added to deionized water (20g), and then added Azodicarbonamide (1.0g) and bisphenol A type nitrile-based resin (18.8g) containing benzoxazine ring were mixed in ball milling for 8h to obtain a viscous liquid, which was then transferred to a watch glass and kept at 80°C / Dry for 12 hours to obtain a golden yellow powder. (2) Flip foaming: put the above powder in a mold and foam at 140°C for 6 hours. During the foaming process, flip the mold up and down once every 3 minutes. (3) Static curing: 200°C / 1h; 250°C / 1h; 300°C / 1h for curing; after cooling and demolding, a bisphenol A-type nitrile resin sandwich structure foam containing benzoxazine rings is obtained.

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Abstract

The invention relates to a nitrile-based resin sandwich structure foam containing a benzoxazine ring and a preparation method thereof. The sandwich structure foam of the present invention is composed of nitrile-based resin containing benzoxazine ring, foaming agent and stabilizer, and is prepared through certain flipping foaming process and curing conditions. The obtained sandwich structure foam inherits the good processability of benzoxazine and the temperature resistance of nitrile resin, has uniform cell distribution, high strength, good temperature resistance and adjustable performance. Moreover, the sandwich structure foam of the present invention is integrally formed, the preparation process is simple and controllable, and products of different sizes and shapes can be formed, which matches with current industrial equipment and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of polymer foams, and in particular relates to a nitrile-based resin sandwich structure foam containing a benzoxazine ring and a preparation method thereof. Background technique [0002] Polymer foam is a porous material formed by gas-phase dispersion in solid-phase polymers. It has the characteristics of light weight, heat insulation, sound insulation, and damping. Using polymer foam as an interlayer and other materials as skins, composite materials with a sandwich structure can be prepared, commonly known as sandwich composite materials, which are widely used in thermal protection, shock absorption and damping, buoyancy and weight reduction, wave penetration and other fields. [0003] As a new type of nitrogen-containing phenolic formaldehyde, benzoxazine not only has good curing performance, but also has excellent processing performance. Moreover, the melt viscosity of benzoxazine resin is relatively hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/10C08L61/34
CPCC08J9/103C08J2203/04C08J2361/34
Inventor 杨旭林雷文武何建忠王登宇曹亚萍冯威李颖王盼李逵
Owner CHENGDU UNIV
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