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Flame retardant waterborne polyurethane and preparation method thereof

A technology of water-based polyurethane and polyether diol, which is applied in the field of flame-retardant water-based polyurethane, can solve the problems of poor flame-retardant effect and non-environmental protection, and achieve the effects of improving flame-retardant effect, slowing down the burning rate, and inhibiting the progress of combustion reaction

Inactive Publication Date: 2015-05-13
济南永昌利化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of poor flame retardant effect and non-environmental protection in the prior art, and to expand the use of polyurethane, the present invention provides a flame retardant waterborne polyurethane and a preparation method thereof. Excellent properties to improve the flame retardancy of WPU, and realize the preparation of flame-retardant waterborne polyurethane

Method used

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  • Flame retardant waterborne polyurethane and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Dehydrate the polyether glycol and 2,2-dimethylolpropionic acid in a vacuum at 120°C and 4kPa for 2.0 hours respectively, and then seal and store for later use;

[0025] (2) Add 30 parts of toluene diisocyanate into a closed reactor with high-speed disperser, thermometer and high-purity nitrogen protection, and mix 4 parts of 2,2-dimethylolpropionic acid and 55 parts of polyether diisocyanate. The alcohol mixture was heated to 120°C to dissolve the 2,2-dimethylolpropionic acid, cooled to room temperature, and then added to the above reactor, and then 1 part of dibutyltin dilaurate was added in a nitrogen atmosphere, Stir and react for 4.0h at 700r / min at 70°C to obtain polyurethane prepolymer;

[0026] (3) Dissolve 4.0 parts of triethylamine and 0.5 parts of 3-aminopropylethoxysilane in 8 parts of deionized water at 5°C, and slowly add the above-mentioned prepolymer at a shear rate of 100rpm and 30m / s rotor speed high-speed shear emulsification for 30 minutes, add 0.5 ...

Embodiment 2

[0029] (1) Dehydrate the polyether glycol and 2,2-dimethylolpropionic acid in a vacuum at 125°C and 4.5kPa for 3.0 hours respectively, and then seal them for later use;

[0030] (2) Add 40 parts of toluene diisocyanate in a closed reactor with high-speed disperser, thermometer and high-purity nitrogen protection, and mix 10 parts of 2,2-dimethylolpropionic acid and 65 parts of polyether diisocyanate. The alcohol mixture was heated to 130°C to dissolve the 2,2-dimethylolpropionic acid, cooled to room temperature and then added to the above reactor, and then 3 parts of dibutyltin dilaurate were added in a nitrogen atmosphere, Stir and react for 4.5h at a speed of 1000r / min at 75°C to obtain a polyurethane prepolymer;

[0031] (3) Dissolve 9 parts of triethylamine and 2.0 parts of 3-aminopropylethoxysilane in 14 parts of deionized water at 10°C, slowly add the above-mentioned prepolymer, at a shear rate of 180rpm, 50m / s rotor speed high-speed shear emulsification for 40 minutes, add...

Embodiment 3

[0034] (1) Dehydrate the polyether glycol and 2,2-dimethylolpropionic acid in a vacuum at 122°C and 4.5kPa for 2.5 hours, and then seal them for later use;

[0035] (2) Add 35 parts of toluene diisocyanate in a closed reactor with high-speed disperser, thermometer and high-purity nitrogen protection, and mix 6 parts of 2,2-dimethylolpropionic acid and 60 parts of polyether diisocyanate. The alcohol mixture was heated to 125°C to dissolve the 2,2-dimethylolpropionic acid, cooled to room temperature and then added to the above reactor, and then 2 parts of dibutyltin dilaurate were added in a nitrogen atmosphere, Stir and react for 4.5h at a speed of 800r / min at 70°C to obtain a polyurethane prepolymer;

[0036] (3) Dissolve 6 parts of triethylamine and 1.3 parts of 3-aminopropylethoxysilane in 10 parts of deionized water at 6°C, and slowly add the above-mentioned prepolymer at a shear rate of 150rpm and 40m / The rotor speed of s is high-speed shear emulsification for 35 minutes, 1.4...

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Abstract

The invention discloses flame retardant waterborne polyurethane which is prepared from the following raw materials: toluene diisocyanate, 2, 2-dimethylolpropionic acid, polyether diol, a catalyst, triethylamine, a silane coupling agent, deionized water, a defoamer and a dispersed nano-silicon sol. According to the flame retardant waterborne polyurethane disclosed by the invention, a polyurethane emulsion is modified by using the silane coupling agent, so that polyurethane has excellent waterproofness, polyurethane, mechanical property and the like, and moreover, the dispersed nano-silicon sol is introduced by using an ultrasonic dispersion method to prepare the flame retardant waterborne polyurethane. As SiO2 has reinforcing and flame-retarding effects, a SiO2 covering matter is formed when the polyurethane is combusted so as to have dual functions of shielding and insulating heat, alleviating burning rate and inhibiting combustion reaction, so that the flame retardant effect is improved, and moreover, the preparation method is good in operability and has a good application prospect.

Description

Technical field [0001] The invention relates to the field of polymer material processing, in particular to a flame-retardant waterborne polyurethane. technical background [0002] Water-based polyurethane (WPU) uses water as the dispersion medium. It has the advantages of non-toxic, environmental protection, low odor, safety and reliability, and energy saving. It is a new type of green environmental protection material, which has been widely used in leather coating, synthetic leather coating, and fabric coating. Layers, coatings, building insulation materials, foam and other fields. However, polyurethane is a flammable material, and it burns quickly and emits high heat. When it burns, it is accompanied by combustible droplets, which makes the flame spread quickly. If it is not flame-retardant, it will become a potential fire hazard. Therefore, improving the flame-retardant properties of water-based polyurethane while retaining its excellent properties is one of the important de...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08K3/36C08J3/03C08G18/76C08G18/66C08G18/48C08G18/30C08G18/34C08G18/12
Inventor 孔繁元吴昌年马东良杨万里张明德
Owner 济南永昌利化工有限公司
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