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A kind of self-emulsifying nonionic water-based polyurethane curing agent and preparation method thereof
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A water-based polyurethane, self-emulsifying technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of non-environmental solvents, low solid content, low NCO active groups, etc., achieve long pot life and low equipment cost , the effect of uniform particle size
Active Publication Date: 2019-02-26
广东聚盈化工有限公司
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Abstract
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Problems solved by technology
But at present, most of the water-based polyurethane curing agents produced are products with lower solid content and lower NCO active groups or use non-environmentally friendly solvents, such as patent documents CN200910042107, CN201410657845, CN201210065431, etc.
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Embodiment 1
[0026] A self-emulsifying non-ionic waterborne polyurethane curing agent prepared from the following components:
[0027] Into a 500mL four-neck flask equipped with a stirring device, a thermometer and nitrogen protection, 340g of hexamethylene diisocyanate (HDI), 3g of N,N-tetramethylpropylenediamine, 5g of triethylenediamine, 2g of β-(3, Pentaerythritol 5-di-tert-butyl-4-hydroxyphenyl)propionate. Simultaneously start stirring and heating, keep the temperature at 50°C for 1 hour; add 50g of polyethylene glycol methyl ether-750, then raise the temperature to 60°C and hold it for 2 hours; then cool down to 50°C and hold it for 1 hour, then filter and discharge the material to obtain product. Use GB 24410-2009 "Limits of Hazardous Substances in Waterborne Wood Coatings for Interior Decoration Materials" to test related items. The test results are shown in Table 1.
[0028] The detection result of table 1 embodiment 1
[0029]
Embodiment 2
[0031] A kind of preparation method of self-emulsifying type nonionic water-based polyurethane solidifying agent, comprises the following steps in a 500mL four-neck flask equipped with stirring device, thermometer and nitrogen protection successively, adds 335g hexamethylene diisocyanate (HDI) biuret, 5g Dibutyltin dilaurate, 8g N,N dimethylcyclohexylamine, 2g β-(3,5-di-tert-butyl-4-hydroxyphenyl) pentaerythritol propionate. Simultaneously start stirring and heating, keep the temperature at 50°C for 1 hour; add 75g of polypropylene glycol methyl ether-750, then raise the temperature to 60°C and hold it for 2 hours; then cool down to 50°C and hold it for 1 hour, then filter and discharge to obtain the product. Use GB24410-2009 "Limits of Hazardous Substances in Waterborne Wood Coatings for Interior Decoration Materials" to test related items. The test results are shown in Table 2.
[0032] The detection result of table 2 embodiment 2
[0033]
[0034]
Embodiment 3
[0036] A kind of preparation method of self-emulsifying type nonionic waterborne polyurethane solidifying agent, comprises the following steps:
[0037] Add 360g hexamethylene diisocyanate (HDI) trimer, 3g dibutyltin dilaurate, 5gN,N-tetramethylpropylenediamine, 2gβ- Pentaerythritol (3,5-di-tert-butyl-4-hydroxyphenyl)propionate. Simultaneously start stirring and heating, keep the temperature at 50°C for 1 hour; add 55g of polyethylene glycol methyl ether-1000, then raise the temperature to 60°C and hold it for 2 hours; then cool down to 50°C and hold it for 1 hour, then filter and discharge the material to obtain product. Use GB 24410-2009 "Limits of Hazardous Substances in Waterborne Wood Coatings for Interior Decoration Materials" to test related items. The test results are shown in Table 3:
[0038] The detection result of table 3 embodiment 3
[0039]
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Abstract
The invention discloses a self-emulsifying type nonionic waterborne polyurethane curing agent and a preparing method thereof. The self-emulsifying type nonionic waterborne polyurethane curing agent is prepared from, by weight, 80-90 % of hexamethylene diisocyanate (HDI) monomer or derivatives of the hexamethylene diisocyanate (HDI) monomer, 10-20 % of materials such as polyethylene glycol methyl ether or poly propylene glycol methyl ether and 1-5 % of other auxiliaries, wherein materials such as polyethylene glycol methyl ether or poly propylene glycol methyl ether include, by weight, 0-30 % of materials such as polyethylene glycol methyl ether and 70-100 % of materials such as poly propylene glycol methyl ether. The self-emulsifying type nonionic waterborne polyurethane curing agent contains little or no solvents, is environment friendly and non-toxic, has low viscosity, and is very easily prone to be dispersed in waterborne polymer; the curing agent has a long activation period, and particle size of the curing agent is uniform after being emulsified so as to have good stability. In addition, according to the preparing method of the self-emulsifying type nonionic waterborne curing agent, there is no need to conduct any post-processing, products can be produced by using general prepolymer production equipment without adding new equipment so as to have the advantages of low equipment cost and simple operation and low energy consumption during the treating process.
Description
technical field [0001] The invention relates to a polyurethane curing agent, in particular to a self-emulsifying non-ionic water-based polyurethane curing agent and a preparation method thereof. Background technique [0002] In recent years, due to the increasing pressure of environmental protection public opinion and the emergence of fire regulations and solvent regulations formulated by some developed countries, the use of solvent-based polyurethane curing agents has been restricted, and polyurethane material researchers around the world have been actively engaged in the development and research of water-based polyurethane curing agents. Then the curing agent of waterborne polyurethane is also produced and developed rapidly. With the increasing awareness of human environmental protection, it has become an inevitable trend and demand for water-based polyurethane materials to replace traditional solvent-based polyurethane materials. [0003] Water-based polyurethane curing ...
Claims
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Application Information
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