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Waterborne extinction polyurethane resin and preparation method thereof

A polyurethane resin, water-based technology, applied in the field of water-based polyurethane resin, can solve the problems of poor scratch resistance, loss of matting effect, and inability to achieve the use effect, and achieve good wear resistance and scratch resistance, not easy to deform, and high extinction. Effect

Inactive Publication Date: 2016-06-22
ZHEJIANG SUNLIGHT MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For polyurethane polymer materials, matting powder is often used to achieve matting at present. The matting powder protrudes from the surface of the coating film and realizes matting through the principle of diffuse reflection; however, the matting powder is a hollow particle with poor scratch resistance and wear resistance. The matting coating film is easy to lose the matting effect due to factors such as friction, so that it cannot achieve the expected use effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] Put 200 parts of polyoxypropylene diol into the reaction kettle, vacuum dehydrate at 100°C for 1 hour, then add 10 parts of dimethylolpropionic acid, 20 parts of N,N-dimethylformamide, and 8 parts 1,4 butanediol, then add 70 parts of isophorone diisocyanate and 0.3 parts of stannous octoate, and react at 85°C for 4h. Then add 7.5 parts of triethylamine to form a salt and neutralize for 20-30 minutes, add 670 parts of water while stirring, and after complete emulsification, add 4 parts of ethylenediamine and 4 parts of diethylenetriamine to extend the chain. Finally, 1.5% polyurethane associative thickener was added to thicken it to obtain a water-based matte polyurethane resin with a viscosity of 4300cps / 25°C.

example 2

[0037] Put 180 parts of polytetrahydrofuran diol into the reaction kettle, vacuum dehydrate at 100°C for 1 hour, then add 8 parts of dimethylolpropionic acid, 50 parts of N,N-dimethylformamide, and 10 parts of Neopentyl glycol, and then add 70 parts of isophorone diisocyanate, 20 parts of dicyclohexylmethane diisocyanate (HMDI) and 0.6 parts of stannous octoate, and react at 90°C for 3h. Then add 6 parts of triethylamine to form a salt and neutralize for 20-30 minutes, add 650 parts of water while stirring, and after complete emulsification, add 3 parts of ethylenediamine and 6 parts of diethylenetriamine to extend the chain. Finally, 0.5% polyurethane associative thickener was added to thicken it to obtain a water-based matte polyurethane resin with a viscosity of 1250cps / 25°C.

example 3

[0039] Put 220 parts of polyneopentyl glycol adipate diol into the reaction kettle, vacuum dehydrate at 100°C for 1 hour, then add 8 parts of dimethylol butyric acid, 20 parts of N,N-dimethylol formamide and 20 parts of acetone, then add 4 parts of ethylene glycol, then add 70 parts of dicyclohexylmethane diisocyanate (HMDI) and 0.5 parts of dibutyltin laurate, and react at 75°C for 5h. Then add 6 parts of triethylamine to form a salt and neutralize for 20-30 minutes, add 640 parts of water while stirring, and after complete emulsification, add 6 parts of ethylenediamine and 3 parts of diethylenetriamine to extend the chain. Finally, 1% polyurethane associative thickener was added to thicken it to obtain a water-based matte polyurethane resin with a viscosity of 2808cps / 25°C.

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PUM

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Abstract

The invention discloses a water-based matting polyurethane resin and a preparation method thereof, comprising macromolecular polyols, hydrophilic diols, small molecule diols, diisocyanates, catalysts, salt-forming agents, amine chain extenders, and deionized water , Thickener. The preparation includes the following steps: step a: add macromolecular diol into the reaction kettle, and vacuum dehydrate at 100°C for 1 hour; step b: add co-solvent, diisocyanate, small molecular polyol and hydrophilic diol; step c: React at 70-90°C for 3-6 hours; Step d: After adding triethylamine to form a salt, add deionized water to emulsify into an emulsion while stirring; Step e: Add amine chain extender; Step f: Add thickener to adjust Viscosity: The prepared water-based polyurethane resin has a high matting degree, no additional matting powder is needed, and the obtained matting coating film is good in abrasion resistance and scratch resistance.

Description

technical field [0001] The invention relates to the field of water-based polyurethane resin, in particular to a water-based matting polyurethane resin and a preparation method thereof. Background technique [0002] In people's daily production, there are many items that need to have a matting effect. For polyurethane polymer materials, matting powder is often used to achieve matting at present. The matting powder protrudes from the surface of the coating film and realizes matting through the principle of diffuse reflection; however, the matting powder is a hollow particle with poor scratch resistance and wear resistance. High-quality matte coatings tend to lose their matting effect due to friction and other factors, thus failing to achieve the expected use effect. It has become a research hotspot in this field to develop a matting product with good and long-lasting matting effect of the coating film and good moldability of the coating film, which has great practical applica...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/34C08G18/32C08G18/08C08G18/12
CPCC08G18/12C08G18/0823C08G18/3206C08G18/348C08G18/4825C08G18/4854C08G18/6659C08G18/6692
Inventor 戴文琪郦向宇成波陈德志
Owner ZHEJIANG SUNLIGHT MATERIAL TECH CO LTD
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