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Light-resistant and anti-aging water-based acrylate coating and preparation method thereof

A water-based acrylic, anti-aging technology, applied in the direction of coating, etc., can solve the problems of easy reunion and compounding, rapid aging, poor anti-ultraviolet performance, etc., achieve good ultraviolet shielding effect, improve absorption capacity, and reduce surface drying time.

Inactive Publication Date: 2021-10-12
上海库曜新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the currently developed water-based acrylic resins have disadvantages such as poor heat resistance, unsatisfactory bond strength, and poor UV resistance, which lead to frequent problems such as easy peeling and separation of the water-based coatings made from the substrate, and rapid aging after long-term exposure to ultraviolet rays. out
Modification with nano-materials is currently an effective means to improve the light resistance and anti-aging performance of coatings. However, due to the obvious shortcomings of nano-materials such as easy agglomeration and rapid electron-hole pair recombination, on the one hand, the manufactured coatings will be damaged. Gloss and transparency are affected to a certain extent, on the other hand, poor UV absorption and reflection cannot effectively slow down the speed of aging degradation

Method used

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  • Light-resistant and anti-aging water-based acrylate coating and preparation method thereof
  • Light-resistant and anti-aging water-based acrylate coating and preparation method thereof
  • Light-resistant and anti-aging water-based acrylate coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of lightfast, anti-aging water-based acrylic paint, the steps are as follows:

[0027] (1) First add 10g nano-TiO to 910g deionized water 2 and 10g nano-SiO 2 , add 10g of 3-aminopropyltriethoxysilane at room temperature and stir for 8h, then add 5g of phosphotungstic acid, continue stirring for 4h, add 40g of fatty alcohol polyoxyethylene ether and 15g of octylphenol polyoxyethylene ether, ultrasonic conditions Under emulsification for 1 hour, the composite nanoparticle emulsion modified by phosphotungstic acid was obtained;

[0028] (2) In a stirred tank, add 235g deionized water, 50g acrylic acid, 80g polymer polyol (polycarbonate diol), and stir for 30min at 40°C; after the temperature rises to 70°C, add 250g methyl methacrylate ester, 200g butyl acrylate, 50g hydroxyethyl acrylate, 20g styrene, 7g potassium persulfate was added dropwise, and the reaction was continued for 30min after the dropwise addition; 100g of the phosphotungstic ...

Embodiment 2

[0030] A preparation method of a lightfast, anti-aging water-based acrylic paint, the steps are as follows:

[0031] (1) First add 10g nano-TiO to 912g deionized water 2 and 10g nanometer ZrO 2 , add 10g of 3-aminopropyltriethoxysilane at room temperature and stir for 10h, then add 8g of silicotungstic acid, continue stirring for 5h, add 30g of fatty alcohol polyoxyethylene ether and 20g of octylphenol polyoxyethylene ether, ultrasonic conditions Emulsified for 1 hour to obtain a composite nanoparticle emulsion modified by silicotungstic acid;

[0032] (2) In the stirred tank, add 152g deionized water, 70g acrylic acid, 90g polymer polyol (polytetrahydrofuran ether glycol), and stir for 30min at 40°C; after the temperature rises to 70°C, add 300g methyl methacrylate ester, 170g butyl acrylate, 80g hydroxyethyl acrylate, 20g styrene, dropwise add 10g potassium persulfate, and continue the reaction for 30min after the dropwise addition; continue to dropwise add 100g of the sil...

Embodiment 3

[0034] A preparation method of a lightfast, anti-aging water-based acrylic paint, the steps are as follows:

[0035] (1) First add 30g nano-TiO to 830g deionized water 2 and 20g nano-Al 2 o 3 At room temperature, add 20g of 3-aminopropyltriethoxysilane and stir for 10h, then add 20g of phosphotungstic acid, continue stirring for 6h, add 60g of sodium polyacrylate and 20g of alkyl polyoxyethylene ether, and emulsify for 1h under ultrasonic conditions. Obtain the composite nanoparticle emulsion modified by phosphotungstic acid;

[0036] (2) In the stirred tank, add 120g deionized water, 80g acrylic acid, 60g polymer polyol (polytetrahydrofuran ether glycol), and stir for 30min at 40°C; after the temperature rises to 70°C, add 250g methyl methacrylate ester, 230g butyl acrylate, 100g hydroxyethyl acrylate, 40g styrene, 12g potassium persulfate was added dropwise, and the reaction was continued for 30min after the dropwise addition; 100g of the phosphotungstic acid modified com...

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Abstract

The invention discloses a light-resistant and anti-aging water-based acrylate coating and a preparation method thereof. The preparation method of the water-based acrylate coating comprises the following steps that: 1) in the presence of organosilane, heteropolyacid and composite nanoparticles can be effectively combined, and the heteropolyacid, the composite nanoparticles, an emulsifier and a wetting agent jointly prepare a nanoparticle emulsion with a better dispersion effect; and 2) in the presence of an initiator, the nanoparticle emulsion is mixed with a comonomer and a cross-linking agent, and neutralizing is performed with alkali liquor, the required coating can be obtained. The water-based acrylic resin is modified by adopting multiple monomers, so that the bonding strength of the coating and a substrate can be remarkably improved; and in addition, the light resistance and the aging resistance of the composite nanoparticles modified by the heteropolyacid are enhanced, and the strict requirements of long-term outdoor environment work can be met.

Description

technical field [0001] The invention belongs to the technical field of water-based acrylic resin coatings, and in particular relates to a light-resistant and anti-aging water-based acrylic coating and a preparation method thereof. Background technique [0002] With the gradual improvement of people's quality of life and environmental awareness, the Chinese government has put forward strict restrictions on the release standards of volatile organic compounds (VOC) in coating applications. The development of green and environmentally friendly water-based coatings will replace traditional solvent-based coatings. The inevitable trend of the future development of the coatings industry. [0003] Due to the advantages of low price, safety and environmental protection, and simple synthesis and processing, water-based acrylic coatings have important applications in the fields of consumer goods such as indoor and outdoor decoration, leather decoration, automobiles and electronics indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/06C09D4/02C09D7/62C09D7/65
CPCC09D4/06C09D7/62C09D7/65C09D7/70
Inventor 姚下银
Owner 上海库曜新材料有限公司
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