Aziridine type waterborne blocked polyisocyanate curing agent and preparation method thereof

A polyisocyanate and aziridine type technology is applied in the field of aziridine type water-based blocked polyisocyanate curing agent and its preparation field, and achieves the effects of long activation period, low energy consumption and low equipment cost

Inactive Publication Date: 2018-03-23
广东聚盈化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, most of the water-based blocked polyisocyanate curing agents produced are blocked agents such as methyl ethyl ketone oxime, imidazole, phenol, etc., such as patent documents CN201110367434.1, CN201210397131.9, CN201410196585.9, etc. Unpacking is purely a decomposition process

Method used

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  • Aziridine type waterborne blocked polyisocyanate curing agent and preparation method thereof
  • Aziridine type waterborne blocked polyisocyanate curing agent and preparation method thereof
  • Aziridine type waterborne blocked polyisocyanate curing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An aziridine type water-based blocked polyisocyanate curing agent is prepared from the following raw materials:

[0031] Add 340g of Covestro's water-based isocyanate curing agent 2655 (HDI trimer type) and 100g of propylene glycol methyl ether acetate into a 1000mL four-necked flask equipped with a stirring device, a thermometer and nitrogen protection in sequence, and rotate at 60 rpm Stir at a speed of / min and raise the temperature to 40°C; add 60g of aziridine and stir at 45°C for 4 hours, then add 2g of triethylamine and keep it at 50°C for 2 hours to test that the NCO value is stable at 2.2-3.2 to prove the reaction Already complete. Then cool down to 30°C and stir evenly, then filter and discharge to obtain the 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.

[0032] The detection result of the polyisocyanate curing agent of t...

Embodiment 2

[0035] An aziridine type water-based blocked polyisocyanate curing agent is prepared from the following components:

[0036] In a 1000mL four-necked flask equipped with stirring device, thermometer and nitrogen protection, add 340g of water-based isocyanate curing agent JY05S (HDI trimer type) and 100g of propylene glycol methyl ether acetate of Guangdong Juying Chemical Co., Ltd. Stir at a speed of 60 rpm and raise the temperature to 40°C; add 60g of aziridine, stir and keep warm at 45°C for 4 hours, then add 1.8g of dibutyltin dilaurate, keep warm at 50°C for 2 hours to test the NCO value Stability between 2.2-3.2 proves that the reaction is complete. Then cool down to 30°C and stir evenly, then filter and discharge to obtain the 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 2.

[0037] The detection result of the polyisocyanate curing agen...

Embodiment 3

[0040] An aziridine type water-based blocked polyisocyanate curing agent is prepared from the following components:

[0041] Add the water-based isocyanate curing agent JY05S (HDI trimer type) and 105g of propylene glycol ether acetate of 340g of Guangdong Juying Chemical Co., Ltd. in a 1000mL four-necked flask equipped with stirring device, thermometer and nitrogen protection successively. Stir at 60 rpm and heat up to 40°C; add 80g of methyl aziridine, stir and keep warm at 45°C for 4 hours, then add 1.8g of dibutyltin dilaurate, keep warm at 50°C for 2 hours to test the NCO value Stability between 2.2-3.2 proves that the reaction is complete. Then cool down to 30°C and stir evenly, then filter and discharge to obtain the 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:

[0042] The detection result of the polyisocyanate curing agent of ta...

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Abstract

The invention discloses an aziridine type waterborne blocked polyisocyanate curing agent and a preparation method. The aziridine type waterborne blocked polyisocyanate curing agent is prepared from the following raw materials in percentage by weight: 65 to 70 percent of waterborne polyisocyanate curing agent, 10 to 15 percent of aziridine and/or derivative thereof, 18 to 25 percent of propylene glycol ether ester solvent and 0.5 to 0.8 percent of additive. The polyisocyanate curing agent provided by the invention contains a few solvent or no solvent, is environment-friendly and nontoxic, is low in viscosity and is extremely easy to dissolve in a waterborne polymer; the aziridine type waterborne blocked polyisocyanate curing agent provided by the invention has the characteristics of being long in activation period, uniform in particle size after being emulsified, and good in stability, being roasted for deblocking at a low temperature, and the like; in addition, the aziridine type waterborne blocked polyisocyanate curing agent does not need to be subjected to any treatment, can be produced by applying a general prepolymer production device, and has the characteristics of low devicecost and simple operation; a new device does not need to be added, and moreover, the energy consumption is low in a treatment process.

Description

technical field [0001] The invention relates to a polyurethane curing agent, in particular to an aziridine-type water-based blocked polyisocyanate curing agent and a preparation method thereof. Background technique [0002] In recent years, due to the increasing pressure of environmental protection and the introduction of fire regulations and solvent regulations in 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. The curing agent of 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] The water-based closed polyurethane curing agent uses water as the dispe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/80C08G18/09
CPCC08G18/092C08G18/807C08G2115/02
Inventor 李恭超颜六廷
Owner 广东聚盈化工有限公司
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