A kind of chemical foaming type polyamide elastomer foaming material and preparation method thereof

A polyamide elastomer and foaming material technology, which is applied in the field of chemical foaming polyamide elastomer foaming material and its preparation, can solve the problem of low viscosity materials that cannot wrap bubbles, bubbles merging or breaking, and difficulties in foaming and molding, etc. problems, achieve the effect of improving melt viscosity and strength, short foaming time and low cost

Active Publication Date: 2021-08-03
THE QUARTERMASTER RES INST OF THE GENERAL LOGISTICS DEPT OF THE CPLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity and strength of polyamide elastomer after melting are relatively poor, and the viscosity of the material is too low to wrap the growing air bubbles, which may easily cause the air bubbles to merge or rupture, resulting in difficulty in foam molding. Therefore, it is necessary to solve this problem when preparing polyamide elastomer foaming materials. a question

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  • A kind of chemical foaming type polyamide elastomer foaming material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1000g polyamide elastomer (polyamide 1010 and polytetrahydrofuran ether glycol copolymerized elastomer, the mass ratio of the two is 30:70), 50g acrylonitrile-butadiene-styrene, 5g nano calcium carbonate, 10g antioxidant 1010 , 30g of stearic acid are mixed evenly, and then added to the twin-screw extruder, the screw speed of the extruder is controlled to be 100 rpm, the working temperature of the extruder is controlled at 220 ° C, extruded and granulated to prepare the required hair. Small bubbles with a diameter of 1mm.

[0035] The small foaming particles prepared above were added to the autoclave together with 5g of sodium lauryl sulfate and 50g of azodicarbonamide, and the air in the kettle was replaced with nitrogen. The temperature was raised to 130°C and started to stir, and the stirring rate was controlled to be 170 rpm, heat preservation for 25 minutes, then heat up to 190°C for 50 minutes, and finally discharge to obtain a polyamide elastomer foamed material ...

Embodiment 2

[0037] Mix 1000g polyamide elastomer (polyamide 6 and polycaprolactone diol copolymer elastomer, the mass ratio of the two is 80:20), 500g polyamide 66, 50g nano-montmorillonite, 1g antioxidant 1010, 1g unsaturated The fatty acid zinc is mixed evenly, and then added to the twin-screw extruder. , the diameter is 5mm.

[0038] The small foaming particles prepared above were added to the autoclave together with 30g of sodium dodecylbenzenesulfonate and 200g of 2,2'-azobisisobutyronitrile, filled with nitrogen to replace the air in the kettle, and the temperature was raised to Start stirring at 150 °C, control the stirring speed to 200 rpm, keep the temperature for 30 minutes, then heat up to 180 °C for 60 minutes, and finally discharge to obtain a polyamide elastomer foam that meets the requirements. The properties are shown in Table 1. .

Embodiment 3

[0040] 1000g polyamide elastomer (polyamide 1012 and polypropylene glycol copolymerized elastomer, its mass ratio is 20:80), 300g ethylene-vinyl acetate copolymer, 30g nano-silica, 15g antioxidant 1098, 15g stearic acid Mix evenly, then add it to the twin-screw extruder, control the screw speed of the extruder to be 150 rpm, control the working temperature of the extruder to be 200 °C, extrude and granulate, and prepare small foamed particles that meet the requirements, diameter is 3mm.

[0041] The foamed small particles prepared above, 20g of peregal 0, 80g of 4,4-oxobisbenzenesulfonyl hydrazide and 40g of 2,2'-azobisisobutyronitrile were added to the autoclave, filled with nitrogen. Replace the air in the kettle, heat up to 120 ° C and start stirring, control the stirring speed to 150 rpm, keep the temperature for 20 minutes, then heat up to 200 ° C for 30 minutes, and finally discharge the material to obtain the required polyamide elastomer foamed material, The performanc...

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Abstract

The invention discloses a chemically foamed polyamide elastomer foam material and a preparation method thereof. The preparation method comprises the following steps: (1) extruding the mixture of polyamide elastomer, melt viscosity regulator, cell nucleating agent and foaming auxiliary agent through an extruder to obtain foamed particles; (2) foaming Granules, surfactants and chemical foaming agent are mixed in a reaction kettle, stirred and kept warm after heating up in an inert atmosphere; foaming is obtained after continuing to heat up. The polyamide elastomer foaming material provided by the invention has the advantages of good resilience, uniform cell size, low foaming material density, good foaming effect, etc., and at the same time has low melt viscosity and melt strength for polyamide elastomer , The characteristics of difficult foaming, the introduction of melt viscosity modifier to improve the viscosity and strength of the melt is conducive to foaming, suitable for popularization and use; the chemical foaming agent used has low raw material cost, short foaming time, large gas generation, and the introduction of surface activity The agent can promote foaming, control the cell diameter and cell dispersion uniformity, etc.

Description

technical field [0001] The invention relates to a chemical foaming type polyamide elastomer foaming material and a preparation method thereof, belonging to the technical field of polymer foaming materials. Background technique [0002] Foam-like material is a composite material formed by introducing a large number of air bubbles into the polymer matrix. This material is light in weight, large in specific surface area, high in specific strength, low in thermal conductivity, good in heat and sound insulation, and absorbable. Impact load and other characteristics can be used in cushioning materials, packaging and transportation, shock absorption and damping, shoe soles, automotive decorative parts and other fields, occupying an important position in real life. With the development of science and technology and the deepening of research, there are more and more types of commonly used foam materials. Among them, foam materials based on polystyrene, polyethylene, polypropylene, po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/10C08L77/06C08L55/02C08L77/12C08L23/08
CPCC08J9/102C08J9/103C08J9/105C08J2203/04C08J2377/06C08J2377/12C08J2423/08C08J2455/02C08J2477/06
Inventor 冯新星王修行潘凯
Owner THE QUARTERMASTER RES INST OF THE GENERAL LOGISTICS DEPT OF THE CPLA
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