Preparation method of photocatalytic self-cleaning polyurethane material

A polyurethane material and self-cleaning technology, applied in the field of functionalized preparation and processing of polyurethane materials, can solve the problems of inability to play a catalytic role, poor compatibility, easy falling off of inorganic particles, etc., to save raw materials, good formability and plasticity, The effect of reducing energy consumption

Active Publication Date: 2012-05-09
HANGZHOU JUHESHUN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, nano-titanium dioxide has poor compatibility with polymers, the coated nano-titanium dioxide cannot play a catalytic role, and nano-scale titanium dioxide inorganic particles are easy to fall off. These problems have led to the inability of nano-titanium dioxide and other inorganic particles to achieve photocatalytic self-cleaning in the polyurethane field. function and industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] A preparation method of photocatalytic self-cleaning polyurethane material, the preparation method adopts the following steps:

[0029] A preparation of polyurethane solution

[0030] The selected polyurethane material refers to a polyurethane material mainly composed of polyisocyanate and oligomer polyol. The polyisocyanate in the polyurethane material is one of aliphatic and aromatic. Put the polyurethane in the organic solvent of N, N-dimethylformamide or N, N-dimethylacetamide, use mechanical stirring to completely dissolve the polyurethane material in the organic solvent, and pump it statically in a vacuum drying oven. The polyurethane solution with a solid content of 15-35% is obtained after vacuum defoaming until there are no bubbles in the mixed solution.

[0031] B Polyurethane material curing molding

[0032] The polyurethane solution obtained through A is separated from the polyurethane solution by heating and drying or liquid phase separation, wherein the...

Embodiment 1

[0039] The preparation steps are as follows: the polyurethane material is selected from the solution polyurethane TC-1925N with a solid content of 20% produced by Coating Chemical Co., Ltd.

[0040] APut 75g of TC-1925N in 25g of N, N-dimethylformamide, use mechanical stirring to completely dissolve TC-1925N, and then statically vacuumize and defoam in a vacuum oven to obtain TC with a solid content of 15%. -1925N solution.

[0041] B. Put the TC-1925N solution obtained in A into a dry oven to solidify TC-1925N. The temperature of the oven is 60°C. After drying for 5 hours, 15g of dense TC-1925N material is obtained.

[0042]C Dissolve 0.75 g of sodium anthraquinone-2-sulfonate in 1.5 L of water, and adjust the pH to 3 with sulfuric acid.

[0043] D Put 15g of the dense TC-1925N material obtained in B into the 1.5L modified solution prepared in C, raise the temperature of the modified solution to 80°C, and react for 1 hour, wash the dense TC-1925N material after the reaction ...

Embodiment 2

[0045] The preparation steps are as follows: the polyurethane material is a solution polyurethane WP-3015LE with a solid content of 30% produced by Coating Chemical Co., Ltd.

[0046] APut 66.67g of WP-3015LE in 33.33g of N,N-dimethylacetamide, and use mechanical stirring to completely dissolve the polyurethane. After static vacuum degassing in a vacuum drying oven, WP-3015LE with a solid content of 20% is obtained. solution.

[0047] B Put the WP-3015LE solution obtained in A into the coagulation water bath, and use the principle of liquid phase separation to separate N, N-dimethylacetamide from the WP-3015LE solution. The temperature of the coagulation water bath is 25 ° C, after 10 hours A porous 20 g WP-3015LE material was obtained.

[0048] C Dissolve 1.6 g of sodium anthraquinone-2,6-disulfonate in 1.6 L of water, and adjust the pH to 3 with hydrochloric acid.

[0049] D put 20g of the porous WP-3015LE material obtained in B into the 1.6L modified solution prepared in ...

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Abstract

The invention relates to a preparation method of a photocatalytic self-cleaning polyurethane material, which comprises the steps of: selecting a polyurethane material with isocyanate and oligomer polyol as main components, carrying out solution blending, curing and forming on the polyurethane material, and modifying the polyurethane material by using an organic catalytic activity organic moleculeto obtain the photocatalytic self-cleaning polyurethane material. The preparation method of the photocatalytic self-cleaning polyurethane material, provided by the invention, has the advantages of easiness of obtaining raw materials, low cost, simple process, convenience for operation control, easiness of realizing the industrialized production and no need of special equipment, and can be used for producing the photocatalytic self-cleaning polyurethane material on the conventional processing equipment. Because the photocatalytic self-cleaning polyurethane material prepared by using the preparation method provided by the invention can show stronger characteristic of decomposing organic pollutants under the irradiation of visible light, ultraviolet light and fluorescent light, has the characteristics of immediate pollutant discharging, wide application range and energy saving, and can be widely applied to the fields, such as clothes, cases, decorations, vehicles, aviation, medical treatment and the like.

Description

technical field [0001] The invention belongs to the field of preparation and processing of functionalized polyurethane materials, in particular to a preparation method of photocatalyzed self-cleaning polyurethane materials. Background technique [0002] Due to its excellent physical and chemical properties, polyurethane materials are favored by consumers. In daily life, polyurethane products are widely used in clothing, luggage, decoration, automobile, aviation and medical fields. In the process of use, polyurethane products will inevitably be invaded by organic stains, such as: various dyes, food and beverage stains, and various easy-to-growth bacteria, etc., and the washing and sterilization process of polyurethane is complicated and wastes energy. causing many troubles and troubles. With the deteriorating environment, especially the recent occurrence of major global pollution incidents, consumers have higher and higher requirements for polyurethane products, which has a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L75/06C08L75/08C08J9/28C08J7/12
Inventor 王栋刘欣徐卫林崔卫钢王凯
Owner HANGZHOU JUHESHUN NEW MATERIAL CO LTD
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