A preparation method of expanded particles and the prepared expanded particles and application thereof

A technology of foaming particles and foaming agent, which is applied in the field of polymer material preparation, can solve the problems of no industrial application, complex process, and difficulty in controlling the production of foamed particles with stable quality.

Active Publication Date: 2019-04-23
江苏欧瑞达新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Among the above three methods, although the first method is currently the only method that has entered mature industrial production, it needs to be combined with several other materials in the production. The process is complicated, the cost is high, and it is exclusively owned. It is easy to form a monopoly situation in the market, which is not conducive to the production, application and promotion of this material
[0010] The second method is theoretically feasible, but in actual production, the final product has extremely strict process requirements, and it is difficult to control the production of foamed particles with stable quality. So far, it only stays on paper and has no actual industrial application;
[0011] Although the third method is better than the second method, it involves high temperature and high pressure in production, which buys hidden dangers for production safety in actual production. Moreover, it is intermittent production, and the output is affected, so it needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] The ratio is made according to the following mass percentage composition: thermoplastic polyurethane elastomer (AH-650 from Taiwan Xinshun), pellets, 95.5%; manganese dioxide 0.5%; foaming agent selected water, acetone, propylene glycol (all commercially available analysis Pure) mixture, the mass ratio between the three is 4:1:0.25, the foaming agent mixture is 3%; the foaming enhancer is a mixture of butyl acetate and ethyl acetate (the mixing ratio is 1:2 by mass ), foam penetration enhancer mixture 0.3%; talc (commercially available), 0.1%, glycerol monoglyceride 0.1%; zinc stearate 0.2%; antioxidant 168 0.3%.

[0093] Kneading the components other than the foaming agent and the foaming penetration enhancer in the above formula through a twin-screw extruder, extruding and granulating, and fully drying to obtain pretreated particles;

[0094] Mix the pretreated particles with the foaming agent and the foaming penetration enhancer, fully stir, place in a closed container, a...

Embodiment 2

[0097] The ratio is made according to the following mass percentage composition: thermoplastic polyurethane elastomer (Taiwan Baoxuan A853), pellets, 92.5%; manganese dioxide 0.01%; foaming agent selected water, acetone, propylene glycol (all commercially available analytically pure) The mass ratio between the three is 4:1:0.25, and the foaming agent mixture is 5%; the foaming penetration enhancer is a mixture of butyl acetate and ethyl acetate (the mixing ratio is 3:1 by mass), Foam penetration enhancer mixture 0.5%; Talc (commercially available), 0.8%, glycerol monoglyceride 0.49%; Calcium stearate 0.2%, Zinc stearate 0.2%; Antioxidant 168 0.3%.

[0098] Kneading and granulating the components other than the foaming agent and foaming penetration enhancer in the above formula through an internal mixer, and fully air-dry to obtain pretreated particles;

[0099] Mix the pretreated particles with the foaming agent and the foaming penetration enhancer, fully stir, place in a closed co...

Embodiment 3

[0102] The ratio is made according to the following mass percentage composition: thermoplastic polyurethane elastomer (KT-890 of Bayer, Germany), pellets, 96%; manganese dioxide 2%; foaming agent selected water, acetone, propylene glycol (all commercially available analysis Pure) mixture, the mass ratio between the three is 4:1:0.25, and the foaming agent mixture is 1%; the foaming penetration enhancer is a mixture of butyl acetate and ethyl acetate (mixing ratio is 1:1), Foaming penetration enhancer mixture 0.3%; Talc (commercially available) 0.1%; Glycerin monoglyceride 0.1%; Zinc stearate 0.2%; Antioxidant 168 0.3%.

[0103] Except for the foaming agent and the foaming penetration enhancer, the components in the above formula are smelted and granulated by a two-roller, and fully dried to obtain pretreated particles;

[0104] Mix the pretreated particles with the foaming agent and the foaming penetration enhancer, fully stir, place in a closed container, and stand for 24 hours to...

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Abstract

The invention relates to a preparation method of foam particles. The preparation method of the foam particles comprises the following steps: S1, a microwave sensitizer is embedded into an expandable base material in a mass ratio of the microwave sensitizer to expandable base material being 0.01-2:92.5-98, and preprocessed particles are obtained; S2, the preprocessed particles obtained in the step 1 are mixed with a foaming agent and a foaming penetration enhancer, the mixture is placed in a closed container and left to stand to enable the foaming agent to penetrate the preprocessed particles sufficiently, and a foamed pre-expanded body is obtained; S3, the foamed pre-expanded body obtained in the step 2 is subjected to microwave heating and subjected to surface cooling anti-sticking processing, foaming is performed, and the foam particles are obtained. The method can be applied to foaming of various polymer elastomers, the process is simple, and requirements for conditions are low. Various thermoplastic polyurethane foam particles prepared with the method have excellent performance.

Description

Technical field [0001] The present invention relates to the field of polymer material preparation, and more specifically, to a method for preparing expanded particles, expanded particles prepared therefrom, and applications of the expanded particles. Background technique [0002] Polymer expanded particles are a gas / solid two-phase composite material composed of an expandable matrix material and gas molecules. In this two-phase composite material, the bubbles can be the dispersed phase and the polymer is the continuous phase; or the bubbles and the polymer are both continuous phases. The bubbles dispersed in the expandable matrix material can significantly change the shape, structure and properties of the polymer, so that the polymer foamed particles have certain unique properties. They are widely used in household daily necessities, transportation, insulation materials, packaging materials, electrical appliances, sports facilities, electronic products and chemical and textile i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/18C08J9/224C08J9/08C08J9/12C08L75/04C08L23/08C08L53/02C08K13/02
CPCC08J9/08C08J9/122C08J9/18C08J9/224C08J2203/20C08J2323/08C08J2353/02C08J2375/04C08K13/02
Inventor 闵拥军
Owner 江苏欧瑞达新材料科技有限公司
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