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Foaming aid for foamed plastics

A technology of foam plastics and foaming aids, applied in the field of plastics, can solve problems such as poor heat resistance, high price, and damage to the dimensional stability of sandwich structures, and achieve excellent mechanical properties

Active Publication Date: 2017-07-14
JIANGSU HUAHONG INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, general-purpose foamed plastics (such as PE, / PP, etc.) have poor heat resistance, and high-temperature deformation destroys the dimensional stability of the sandwich structure, which cannot meet the requirements of the above fields.
At present, the foam plastics used in the above fields in China are mainly imported from Germany, which is expensive

Method used

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  • Foaming aid for foamed plastics
  • Foaming aid for foamed plastics
  • Foaming aid for foamed plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Weigh 500 kg of acrylonitrile, 350 kg of methacrylic acid, 30 kg of acrylamide, 25 kg of dibenzoyl peroxide, 60 kg of azodicarbonamide, 20 kg of foaming aid and 6 kg of methacrylamide. The foaming aid has the following structural formula:

[0013]

[0014] Mix the above-mentioned substances and stir them with a high-speed mixer for 5 hours until the mixture becomes wine red, pour it into the cavity of a glass mold and seal it, place it in a circulating water tank at 50°C for 72 hours, and then place it in a foaming tool, together with the foaming tooling Put them together in an electric constant temperature blast drying oven for foaming, the foaming temperature is controlled at 150°C, the foaming time is 25min, and then heat treatment is carried out at 160°C and 180°C for 2 hours respectively to obtain the foamed plastic.

Embodiment 2

[0016] A foam was prepared in the same manner as in Example 1 except that no foaming aid was used.

experiment example

[0018] Test the tensile strength according to GB / T 1040-2006, the sample size is 150mm×20mm×plate thickness (8mm), and the tensile rate is 5mm / min. After inspection, the tensile strength of the sample in Example 1 was 73.5Mpa, and the tensile strength of the sample in Example 2 was 43.5Mpa. The results were compared and the difference was statistically significant (P<0.05). It can be seen that the addition of foaming aids greatly improves the tensile hardness of the product.

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Abstract

The invention relates to a foaming auxiliary agent for foamed plastics, the foaming auxiliary agent has the following structural formula: The foaming aid for foamed plastics of the present invention can be used to prepare foamed plastics, has excellent mechanical properties, heat resistance and molding processability, and is an ideal core material for engineering structures.

Description

technical field [0001] The invention relates to the field of plastics, in particular to a foaming aid for foamed plastics. Background technique [0002] With the rapid development of special fields such as aerospace, the core material is required to have higher strength, stiffness and heat resistance. However, general-purpose foamed plastics (such as PE, / PP, etc.) have poor heat-resistant strength, and high-temperature deformation destroys the dimensional stability of the sandwich structure, which cannot meet the requirements of the above-mentioned fields. At present, the foam plastics used in the above fields in China are mainly imported from Germany, which are expensive. In order to break the long-term dependence on imports and reduce costs, it is of great strategic significance to develop foam plastics with independent intellectual property rights. Contents of the invention [0003] The object of the present invention is to provide a foaming aid for foamed plastics. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/3465C08L33/20C08J9/10
Inventor 李娜贾军生孙铁玲
Owner JIANGSU HUAHONG INDAL GROUP