Non-ionic aqueous HDI polyurethane curing agent preparation method

A polyurethane curing agent, non-ionic technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of difficult to popularize water-based paint, high cost, high price, etc., achieve high fullness, good yellowing resistance , The effect of strong pollution resistance

Active Publication Date: 2016-06-15
UNION FOSHAN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the polyurethane curing agents commonly used in the market are solvent-based. Water-based polyurethane curing agents are basically prod

Method used

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  • Non-ionic aqueous HDI polyurethane curing agent preparation method
  • Non-ionic aqueous HDI polyurethane curing agent preparation method
  • Non-ionic aqueous HDI polyurethane curing agent preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0010] In the synthesis kettle, add 20 parts of dried diethylene glycol ethyl ether acetate, after heating and dissolving 68 parts of HDI trimer (NCO content 21.5%), add 12 parts of polyethylene glycol monobutyl ether (Mr1000), Introduce N2 protection, react at 50-55°C for 1 hour, keep constant temperature at 105-110°C for 2.5 hours, cool and filter to obtain a solid content of 80%, NCO content of 18.2%, and viscosity of 2500mPa·s Non-ionic water-based HDI polyurethane curing agent.

Embodiment 2

[0012] In the synthesis kettle, add 25 parts of dried propylene glycol methyl ether acetate, after heating and dissolving 65 parts of HDI trimer (NCO content 20.6%), add 10 parts of polyethylene glycol (Mr1000) and feed N2 protection, in After reacting at 60°C for 1 hour, keep the constant temperature reaction at 100°C for 2.5-3 hours, cool and filter to prepare a non-ionic water-based HDI polyurethane curing agent with a solid content of 75%, an NCO content of 17.5%, and a viscosity of 2300mPa·s .

Embodiment 3

[0014] In the synthesis kettle, add 20 parts of dried dipropylene glycol butyl ether, heat and dissolve 60 parts of HDI trimer (NCO content 21.6%), then add 10 parts of polyethylene glycol monomethyl ether (Mr600) and 10 parts of poly Oxypropylene glycol (Mr1000), N 2 Protection, after reacting at 60°C for 1 hour, keep the constant temperature reaction at 100°C for 2.5-3 hours, cool and filter to obtain a non-ionic water-based HDI with a solid content of 80%, an NCO content of 15.6%, and a viscosity of 2400mPa·s Polyurethane curing agent.

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Abstract

The present invention relates to a non-ionic aqueous HDI polyurethane curing agent preparation method. The non-ionic aqueous HDI polyurethane curing agent mainly consists of HDI trimers, low molecular weight polyether polyols and an inert solvent. The obtained non-ionic aqueous HDI polyurethane curing agent is free of arene, glycol ethers and alkyl phenol, environmentally friendly, good in scratch resistance, good in transparency, excellent in chemical resistance, strong in pollution resistance, good in yellowing resistance, etc. A polyurethane paint prepared by an aqueous hydroxyl components is high in hardness and high in transparency, the paint film is good in scratch-resistant, and the polyurethane paint is good in flow leveling, high in fullness, good in compatibility, etc. The curing agent is a specific curing agent used for waterborne carpentry paint, waterborne industrial paint, waterborne plastic paint and various two-component waterborne polyester paint, waterborne polyurethane paint, waterborne epoxy paint, waterborne alkyd paint, waterborne polyurethane glue, etc.

Description

technical field [0001] The invention relates to a preparation method of a water-based polyurethane curing agent, in particular to a non-ionic water-based HDI polyurethane curing agent. Background technique [0002] Over the past 30 years of China's reform and opening up, the problem of environmental degradation has gradually emerged. According to the research of environmental departments and experts, the main pollution sources such as automobile exhaust, VOC, and flying dust are the main causes of haze weather. Among the main pollution sources, VOC emissions from the paint and coating industry account for 1% of the total VOC emissions. / 4 or more; China's annual VOC emissions exceed 20 million tons, which is twice that of the United States and three times that of the European Union. Recently, the smog has been reduced across the country. The whole society attaches great importance to the development of green production and green products. The government has also issued quit...

Claims

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Application Information

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IPC IPC(8): C08G18/79C08G18/48C09D175/08
Inventor 许钧强康伦国姚东生阳京辉
Owner UNION FOSHAN CHEM
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