Preparation method of hyperbranched wear-resistant and flame-retardant UV-cured waterborne polyurethane

A water-based polyurethane modification technology, which is applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve the problems of restricting the application of water-based polyurethane, poor flame retardancy and water resistance of water-based polyurethane coating films, and achieve good chemical stability Sex, high hardness effect

Active Publication Date: 2022-02-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame retardancy and water resistance of waterborne polyurethane coating film are poor, which limits the application of waterborne polyurethane to a large extent.

Method used

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  • Preparation method of hyperbranched wear-resistant and flame-retardant UV-cured waterborne polyurethane
  • Preparation method of hyperbranched wear-resistant and flame-retardant UV-cured waterborne polyurethane
  • Preparation method of hyperbranched wear-resistant and flame-retardant UV-cured waterborne polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of hexahydric alcohol:

[0046] a. Add 2.61g THEIC to a clean 50mL beaker, place it in an oil bath magnetic stirring device, set the temperature at 40°C, add 5g DMF to dissolve until the white solid powder disappears completely. Take 6.67g of IPDI in a three-necked flask, add 1-2 drops of DBTDL dropwise, and turn on the stirring device. When the temperature rises to 45°C, slowly add 2.61g of THEIC dissolved in DMF to the three-necked flask, and react for 12 hours;

[0047] b. Heat up to 65°C, dissolve 4.20g THPO in 5g DMF, slowly add THPO dropwise to the system at a rate of 4-5s / drop and observe the viscosity of the system. During the dropping process, an appropriate amount of DMF can be added to adjust the viscosity of the system. Reaction After 3 hours, a small amount of sample was taken out for infrared measurement, and it was observed that 2270cm -1 The product was collected and preserved after the peak disappeared, and it was recorded as NP-6OH. T...

Embodiment 2

[0062] Add the modified nano-Al prepared by 0.1g step (3) in the step (4) 2 o 3 Slurry, other steps are with embodiment 1.

Embodiment 3

[0064] Add the modified nano-Al prepared by 0.2g step (3) in the step (4) 2 o 3 Slurry, other steps are with embodiment 1.

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Abstract

The invention relates to a preparation method of hyperbranched wear-resistant and flame-retardant UV-cured waterborne polyurethane, and belongs to the technical field of functional coatings. The preparation method comprises the following steps of: firstly, synthesizing hexahydric alcohol NP-6OH containing N and P through two-step reaction, and then preparing hyperbranched waterborne polyurethane emulsion by taking diisocyanate as a matrix; and adding modified nano Al2O3 slurry into the polyurethane emulsion, and finally carrying out UV curing to obtain hyperbranched wear-resistant and flame-retardant UV-cured waterborne polyurethane. The polyurethane prepared by the invention not only has the general characteristics of nano materials, but also has the properties of high hardness, good chemical stability, high temperature resistance, corrosion resistance and the like.

Description

technical field [0001] The invention relates to a preparation method of hyperbranched wear-resistant and flame-retardant UV-cured waterborne polyurethane, which belongs to the technical field of functional coatings. Background technique [0002] With the increasing awareness of environmental protection, the demand for non-solvent coatings in the market continues to expand. And in recent years, due to the stricter restrictions on volatile organic compound (VOC) emissions, many companies and researchers have begun to try to use environmentally friendly coatings. High-quality coatings replace traditional high-VOCs content coatings. High-performance UV (ultraviolet light) curing coatings are widely used in industrial and air pollution control due to their low coating exhaust emissions and high coating efficiency. Preferred option. [0003] UV curing water-based polyurethane combines the safety and energy saving of UV curing technology and the characteristics of environmental p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D5/18C09D5/08C09D7/62C08G18/67C08G18/44C08G18/32C08G18/66
CPCC09D175/14C09D5/18C09D5/08C09D7/62C08G18/672C08G18/44C08G18/3889C08K2003/2227C08K2201/011C08K2201/005C08K9/06C08K3/22C08G18/6644
Inventor 姚伯龙张晋瑞陈欢王宇通倪亚洲程广鸿
Owner JIANGNAN UNIV
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