A kind of waterborne polyurethane anti-glare coating material and preparation method thereof

A technology of water-based polyurethane and coating materials, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of complex preparation process and industrialization to be improved, and achieve uniform distribution, increased dispersion and storage stability, and durability The effect of reducing polishability

Active Publication Date: 2019-01-15
QINGYUAN YAKOO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ding Xuejia etc. adopt DL-1000 and DL-400 two kinds of polyether polyols with different molecular weights in Chinese patent (CN104177951A), diphenylmethane diisocyanate, dimethylol propionic acid as raw material synthetic waterborne polyurethane; Polystyrene (PS), polymethyl methacrylate (PMMA), poly-n-butyl acrylate (PBA) / PS, PBA / PMMA, silicon dioxide (SiO 2 ) / PS five kinds of nano-microspheres, using water-based polyurethane as the film-forming system, nano-microspheres as anti-glare particles, prepared anti-glare water-based polyurethane coatings, but the preparation process is too complicated, and the industrialization needs to be improved
[0006] At present, there are few studies on the anti-glare effect of WPU film-forming resin body at home and abroad. Therefore, it is of great significance to develop new WPU film-forming resin anti-glare coatings with high light transmission and good diffusion properties.

Method used

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  • A kind of waterborne polyurethane anti-glare coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042](1) Put 94.08g of polytetrahydrofuran diol (PTMG-1000, 1000g / mol) and 3.90g of 2,2-dimethylolpropionic acid after dehydration into the reaction kettle at room temperature, drop 0.05g of dihydrofuran Dibutyltin laurate catalyst, after stirring evenly, add 52.02g of isophorone diisocyanate (control R value 1.9:1) for prepolymerization reaction: first gradually raise the temperature to 60°C, react for 1.5h; then continue to heat up to 80°C , Reaction 2.5h. During the reaction, the remaining NCO group content was determined to be constant by di-n-butylamine method. The prepolymer was cooled to about 40°C.

[0043] (2) Add 2.94 g of triethylamine to the product obtained in step (1), neutralize to form a salt for 10 minutes, and further cool to 30° C.

[0044] (3) Pour the product of step (2) into 409.00 g of sodium ethylenediamine ethyl sulfonate aqueous solution with a mass concentration of 2.73%, emulsify and extend the chain for 15 minutes, and the stirring rate is 3000 ...

Embodiment 2

[0054] (1) Put 87.32g of PTMG-1000 and 5.34g of 2,2-dimethylolbutanoic acid after dehydration treatment in the reaction kettle at room temperature, drop in 0.15g of dibutyltin dilaurate catalyst, stir well, add 52.02g of isophorone diisocyanate (control R value 1.9:1) for prepolymerization: first gradually raise the temperature to 65°C, react for 1.0h; then continue to raise the temperature to 82°C, react for 2.0h. During the reaction, the remaining NCO group content was determined to be constant by di-n-butylamine method. The prepolymer was cooled to about 50°C.

[0055] (2) Add 4.17 g of tripropylamine to the product of step (1), neutralize to form a salt for 15 minutes, and further cool to 25°C.

[0056] (3) Pour the product of step (2) into 222.50 g of sodium ethylenediaminoethylsulfonate aqueous solution with a mass concentration of 7.00%, emulsify and extend the chain for 20 minutes, and the stirring rate is 1800 rpm.

[0057] (4) At a stirring rate of 1000 rpm, 2.19 g...

Embodiment 3

[0060] (1) Put 102.24g of PTMG-1000 and 3.90g of 2,2-dimethylolpropionic acid after dehydration treatment in the reaction kettle at room temperature, drop in 0.09g of bismuth isooctanoate catalyst, stir well, add 43.86g Prepolymerization of isophorone diisocyanate (control R value 1.5:1): first gradually raise the temperature to 55°C, react for 1.5h; then continue to raise the temperature to 80°C, react for 2.5h. During the reaction, the remaining NCO group content was determined to be constant by di-n-butylamine method. The prepolymer was cooled to about 40°C.

[0061] (2) Add 1.02 g of ammonia water to the product of step (1), neutralize to form a salt for 10 minutes, and further cool to 30°C.

[0062] (3) Pour the product of step (2) into 504.00 g of sodium ethylenediamine ethylsulfonate aqueous solution with a mass concentration of 0.50%, emulsify and extend the chain for 15 minutes, and the stirring rate is 3000 rpm.

[0063] (4) At a stirring rate of 800 rpm, 6.63 g of...

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Abstract

The invention discloses a water-based polyurethane anti-glare coating material and a preparation method thereof. The preparation method mainly comprises the following steps: first stage: by using polyoxytetramethylene glycol and dihydroxymethyl eicosanoic acid as raw materials, adding an organic metallic catalyst and diisocyanate to react, and adding a tertiary amine neutralizer to generate an isocyanate-terminated water-based polyurethane prepolymer; and second stage: two-step chain extension and emulsification: simultaneously carrying out emulsification and chain extension reaction on the prepolymer in a sulfonate-chain-extender-containing water solution under high-speed shearing actions until the prepolymer can be uniformly emulsified in water, and dropwisely adding a hydrazine chain extender to obtain the water-based polyurethane anti-glare emulsion. The coated film of the polyurethane anti-glare emulsion has the characteristics of low glossiness and high light transmittance, and is applicable to the fields of architectural lighting, road traffic, display screens, textile leather and the like.

Description

technical field [0001] The invention relates to a polyurethane anti-glare emulsion, in particular to a water-based polyurethane anti-glare coating material and a preparation method thereof. Background technique [0002] The problems caused by glare have seriously affected people's daily life, and my country has not yet issued clear regulations and control standards for the treatment of glare problems. Therefore, in order to protect people's visual health and improve the quality of life, it is necessary to take A series of measures to prevent glare. [0003] Controlling glare in the process of light transmission is currently the main method to prevent glare. Turning the specular reflection of light into diffuse reflection can effectively reduce the reflection of excessively bright light into the human eye, thus playing the role of anti-glare. Or coating a layer of anti-glare paint on the lampshade can also effectively change the light path and weaken the mutual interference ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/34C08G18/12C08G18/32C09D175/08
CPCC08G18/12C08G18/348C08G18/4854C08G18/6692C09D175/08C08G18/3857
Inventor 彭晓宏朱嘉琦
Owner QINGYUAN YAKOO CHEM CO LTD
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