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Nanometer bismuth vanadate antifouling self-cleaning surface finishing aid for PVC

A surface finishing and self-cleaning technology, used in antifouling/underwater coatings, paints containing biocides, coatings, etc. High strength, strong adhesion and good dispersion stability

Inactive Publication Date: 2020-05-01
南通吉美装饰材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The self-cleaning coating is mainly super-hydrophilic. In the actual process, oily pollutants tend to cover the hydrophilic substances on the surface of the coating, which greatly reduces the self-cleaning function of the coating, or even loses the self-cleaning effect.

Method used

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  • Nanometer bismuth vanadate antifouling self-cleaning surface finishing aid for PVC
  • Nanometer bismuth vanadate antifouling self-cleaning surface finishing aid for PVC

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1, adjust the pH of nano-BiVO4 particles, appropriate amount of absolute ethanol, NaOH and oxalic acid to 6, and use a high-speed emulsifier and ultrasonic instrument to disperse them for 10 minutes to prepare a 10% nano-BiVO4 dispersion.

[0029] Take an appropriate amount of nano-BiVO4 dispersion emulsion, add a certain amount of titanate coupling agent TM-P, adjust the pH to 6, reflux at 80°C for 2 hours, centrifuge the product, wash it to no ethanol, and dry it for 8 hours to obtain the modified BiVO4 particles.

[0030] Take an appropriate amount of modified BiVO4 particles, DMF, and 0.5% sodium hexametaphosphate, of which the content of modified BiVO4 particles is 5%, and use a high-speed emulsifier and an ultrasonic instrument to disperse them for 10 minutes, stir and react at 80 ° C for 2 hours, and obtain photocatalytic self-cleaning Finishing agent.

[0031] Use a coating machine to coat a 0.05 mm protective layer on the dry PVC film, pre-bake at 80°C...

Embodiment 2

[0032] Example 2, adjust the pH of nano-BiVO4 particles, appropriate amount of absolute ethanol, NaOH and oxalic acid to 6, and use a high-speed emulsifier and ultrasonic instrument to disperse them for 10 minutes to prepare a 12% nano-BiVO4 dispersion.

[0033] Take an appropriate amount of nano-BiVO4 dispersion emulsion, add a certain amount of titanate coupling agent TM-P, adjust the pH to 6, reflux at 80°C for 2 hours, centrifuge the product, wash it to no ethanol, and dry it for 10 hours to obtain the modified BiVO4 particles.

[0034] Take an appropriate amount of modified BiVO4 particles, DMF, and 0.5% sodium hexametaphosphate, of which the content of modified BiVO4 particles is 4%, disperse them with a high-speed emulsifier and an ultrasonic instrument for 10 minutes, stir and react at 80°C for 2 hours, and obtain photocatalytic self-cleaning Finishing agent.

[0035] Use a coating machine to coat a 0.05 mm protective layer on the dry PVC film, pre-bake at 80°C for 3 ...

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Abstract

The invention discloses a nanometer bismuth vanadate antifouling self-cleaning surface finishing aid for PVC. A preparation method for the surface finishing aid comprises the following steps: A, preparation of a nanometer BiVO4 dispersion liquid: regulating the pH value of nanometer BiVO4 particles, a proper amount of absolute ethyl alcohol, NaOH and oxalic acid until weak acidity is obtained, andcarrying out dispersing to obtain the nanometer BiVO4 dispersion liquid; B, preparation of modified nanometer BiVO4 particles: weighing a proper amount of the nanometer BiVO4 dispersion liquid, adding a hydrolysate of a coupling agent, and adjusting a pH value until weak acidity is obtained so as to obtain the modified BiVO4 particles; C, preparation of a photocatalytic self-cleaning finishing agent: weighing the modified BiVO4 particles, DMF and 0.5% sodium hexametaphosphate to obtain the photocatalytic self-cleaning finishing agent; and D, PVC film coating: coating a dried PVC film materialwith a protective layer having a thickness of 0.04-0.06 mm by adopting a coating machine, then coating the PVC film material with the photocatalytic self-cleaning finishing agent containing the modified nanometer BiVO4 particles, and carrying out drying to obtain the self-cleaning PVC film material. The surface finishing aid is high in lipophilicity and good in dispersion stability; and a coatingformed by the surface finishing aid is high in adhesive force with the PVC membrane material, the surface of the PVC film material is endowed with the self-cleaning characteristic, and the value increasing space of the PVC film material is enlarged.

Description

technical field [0001] The invention relates to the technical field of nano-bismuth vanadate anti-fouling self-cleaning surface finishing additives for PVC, in particular to a nano-bismuth vanadate anti-fouling self-cleaning surface finishing additive for PVC. Background technique [0002] In nature, lotus leaves and butterfly wings have a good surface self-cleaning function, so that pollutants, dust, etc. can fall off or degrade by themselves under the action of natural external forces, so as to achieve the surface self-cleaning effect. At present, surface self-cleaning coating processing technology is mainly used in glass and metal processing, which greatly saves the cost of cleaning and maintenance of these materials during later use. [0003] The self-cleaning coating is mainly super-hydrophilic. In the actual process, oily pollutants tend to cover the hydrophilic substances on the surface of the coating, which greatly reduces the self-cleaning function of the coating, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/16C09D7/61C08J7/04C08L27/06
CPCC08J7/06C08J2327/06C09D1/00C09D5/1656C09D5/1687
Inventor 夏登明周瑾王向锋张陈成
Owner 南通吉美装饰材料有限公司
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