Preparation method for self-cleaning polyurethane elastomer film

A polyurethane elasticity and self-cleaning technology is applied in the field of preparation of self-cleaning polyurethane elastomer films, which can solve the problems of poor application experience, restricting popularization and application, affecting aesthetics, etc., so as to improve the surface self-cleaning function and the process is simple. , The effect of not easy to fall ash

Active Publication Date: 2018-09-28
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the TPU structure contains a large number of polar groups, its surface energy is extremely large, and it is easy to fall ash, making its surface polluted, affecting its appearance, making its application experience poor, and limiting its further promotion and application.
At present, there is no relevant report on the preparation of self-cleaning TPU by blending modification

Method used

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  • Preparation method for self-cleaning polyurethane elastomer film
  • Preparation method for self-cleaning polyurethane elastomer film
  • Preparation method for self-cleaning polyurethane elastomer film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Mix TPU powder and polydodecafluoroheptyl methacrylate in a mixer at high speed for 5 minutes, and the mass ratio of TPU to polydodecafluoroheptyl methacrylate is 10:1.

[0020] 2) The molecular weight of polydodecafluoroheptyl methacrylate used in step 1 is 1×10 3 .

[0021] 3) Put the mixture obtained in step 1 into a screw machine to extrude and cast to form a film. The temperature range of the screw is 60°C-180°C, and the temperature of the roller of the calender is 40°C.

[0022] 4) Place the blended TPU film obtained in step 3 in an environment of 40°C for 72 hours, and anneal to set it.

[0023] The surface contact angle of the blended modified TPU film prepared in this implementation case is 102°, and it is difficult to write with an oily water pen. The traces can be directly wiped clean with a wet towel. There is no obvious dust on the surface after being placed indoors for 7 days. A small amount of dust can be cleaned directly with water.

[0024] figur...

Embodiment 2

[0027] 1) Put TPU powder and tetrafluoroethylene-perfluoro-n-propyl vinyl ether copolymer in a mixer and mix at high speed for 5 minutes. The mass ratio of TPU to tetrafluoroethylene-perfluoro-n-propyl vinyl ether copolymer is 50: 1.

[0028] 2) The molecular weight of tetrafluoroethylene-perfluoron-propyl vinyl ether copolymer used in step 1 is 1×10 5 .

[0029] 3) Put the mixture obtained in step 1 into a screw machine for extrusion casting to form a film. The temperature range of the screw is 60°C-180°C, and the temperature of the roller of the calender is 80°C.

[0030] 4) Place the blended TPU film obtained in step 3 in an environment of 80°C for 24 hours, and then anneal and set it.

[0031] The surface contact angle of the blended modified TPU film prepared in this implementation case is 95°, which is difficult to write with an oil-based pen, and its traces can be directly wiped clean with a wet towel. There is no obvious dust on the surface after being placed indoo...

Embodiment 3

[0033] 1) Put TPU powder and chlorotrifluoroethylene copolymer in a mixer and mix them at high speed for 5 minutes. The mass ratio of TPU to chlorotrifluoroethylene copolymer is 25:1.

[0034] 2) The molecular weight of the chlorotrifluoroethylene copolymer used in step 1 is 1×10 4 .

[0035] 3) Put the mixture obtained in step 1 into a screw machine for extrusion casting to form a film. The temperature range of the screw is 60°C-180°C, and the temperature of the roller of the calender is 60°C.

[0036] 4) Place the blended TPU film obtained in step 3 in an environment at 60°C for 48 hours, and anneal to set it.

[0037] The surface contact angle of the blended modified TPU film prepared in this implementation case is 97°, which is difficult to write with an oil-based pen, and its traces can be directly wiped clean with a wet towel. There is no obvious dust on the surface after being placed indoors for 7 days, and there is a small amount of dust on the surface after being p...

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Abstract

The invention discloses a preparation method for a self-cleaning polyurethane elastomer film. The method comprises the following steps: uniformly mixing a fluorine-containing polymer and TPU resin, and performing film casting by using an extruder. According to the preparation method disclosed by the invention, the blended TPU film prepared by the method has low surface energy, ash is not easy to fall, and pollutants are easily washed by water, so that the film has antifouling and self-cleaning functions; the actual use effect is improved, and applications of the film in the fields of packagingmaterials, vehicle covers, garment fabrics and the like are further expended; and the preparation method for the blended film has a simple process, is easy to operate, and has larger market prospects.

Description

technical field [0001] The invention belongs to the technical field of high-performance membrane materials, and in particular relates to a preparation method of a self-cleaning polyurethane elastomer membrane which is simple to prepare, has low surface energy, is self-cleaning, and can better maintain material properties. Background technique [0002] Polyurethane elastomer (referred to as TPU elastomer, the same below) film is gradually becoming It is used to replace traditional rubber and plastic, and is widely used in clothing fabrics, shoe materials, auto parts, electronic products, optical products, outdoor products, medical supplies, and industrial products. [0003] TPU elastomer film can replace the widely used polyvinyl chloride film at present, and its performance is more superior. In addition, the TPU elastomer film is recyclable, non-toxic, environmentally friendly and degradable. It can be naturally decomposed after being buried in the soil for a few years, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L33/16C08L27/18C08L27/12C08J5/18
CPCC08J5/18C08J2375/04C08J2427/12C08J2427/18C08J2433/16
Inventor 费正东应颂颂范萍陈枫钟明强
Owner ZHEJIANG UNIV OF TECH
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