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Light-shielding flame-retardant water-based polyurethane and preparation method thereof

A water-based polyurethane, light shielding technology, used in polyurea/polyurethane coatings, coatings, fire-retardant coatings, etc., can solve problems such as poor UV protection and damage to wood, achieve good industrial application value and improve shielding effect. , good shielding effect

Inactive Publication Date: 2019-05-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, wood and other materials are prone to lignin degradation under ultraviolet light in the short-wave and medium-wave regions, causing wood damage.
The above coatings do not provide sufficient protection against UV damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 1.24g of hydrophilic nano-TiO 2 , dry it at 80°C for 24h, add 100.00g PPG, 37.45g OP550 and 83.18gIPDI into a four-necked flask equipped with a thermometer, feed nitrogen into the reaction system, and place the four-necked flask at 85°C The reaction system was allowed to react for 3 hours in an oil bath environment; then, 13.67g DMPA and 247.97g acetone were added to the reaction system, and the reaction was continued for 3 hours; then the temperature was lowered to 40°C, and 13.67g TEA was added to neutralize the reaction for 30 minutes, and the reaction was stopped. Nitrogen was passed to obtain a prepolymer product soluble in acetone; after the acetone was removed by rotary evaporation, 210.00 g of the prepolymer product was taken out, 490.00 g of deionized water was added, and emulsified under stirring and shearing at 3000 rpm for 30 minutes to obtain light shielding Flame retardant water-based polyurethane.

[0031] The UV light transmittance of the tested li...

Embodiment 2

[0033] Get 2.34g hydrophilic nano-TiO 2, dry it at 80°C for 24h, add 100.00gPPG, 35.38gOP550 and 73.17gIPDI into a four-necked flask equipped with a thermometer, feed nitrogen into the reaction system, and place the four-necked flask at 85°C The reaction system was reacted in an oil bath environment for 3 hours; then, 12.92g of DMPA and 234.39g of acetone were added to the reaction system, and the reaction was continued for 3 hours; then the temperature was lowered to 40°C, and 12.92g of TEA was added for neutralization reaction After 30 minutes, the nitrogen flow was stopped to obtain a prepolymer product soluble in acetone; after the acetone was removed by rotary evaporation, 210.00 g of the prepolymer product was taken out, 490.00 g of deionized water was added, and emulsified for 30 minutes under stirring and shearing at 3000 rpm , to obtain light-shielding flame-retardant waterborne polyurethane.

[0034] The UV transmittance of the tested light-shielding flame-retardant...

Embodiment 3

[0036] Take 6.00g of hydrophilic TiO 2 , dry it at a temperature of 80°C for 24h, add 100.00g of PPG, 45.37g of OP550 and 121.54g of IPDI into a four-necked flask equipped with a thermometer, feed nitrogen into the reaction system, and put the four-necked flask The flask was placed in an oil bath environment at 85°C, and the reaction system was reacted for 3 hours; then, 16.54g of DMPA and 299.99g of acetone were added, and the reaction was continued for 3 hours; then the temperature was lowered to 40°C, and 16.54g of TEA was added in progress And react for 30 minutes, stop nitrogen, obtain the prepolymer product that is dissolved in acetone; After the acetone is removed by rotary evaporation, take out the prepolymer product of 240.00g, add the deionized water of 560.00g, emulsify under the stirring shear of 3000rpm After 30 minutes, a light-shielding flame-retardant waterborne polyurethane was obtained.

[0037] The UV light transmittance of the tested light-shielding flame-...

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Abstract

The invention relates to light-shielding flame-retardant water-based polyurethane and a preparation method thereof, and belongs to the technical field of flame-retardant polyurethane material preparation, the light-shielding flame-retardant water-based polyurethane is prepared form a hydrophilic nano-particle, polyether glycol, isocyanate and a hydrophilic chain extender as raw materials by addinga solvent to reduce the viscosity of the system, performing alkaline neutralization to synthesize a water-based polyurethane prepolymer and performing high-speed stirring emulsification; and the light shielding flame-retardant water-based polyurethane prepared by the preparation method disclosed by the invention is good in ultraviolet shielding effect, low in glossiness and good in flame retardancy, and the limit oxygen index is over 29.0%.

Description

technical field [0001] The invention belongs to the technical field of organic materials, and in particular relates to a preparation method of light-shielding flame-retardant water-based polyurethane. Background technique [0002] Water-based polyurethane is a new type of polyurethane system that uses water instead of organic solvents as the dispersion medium, also known as water-dispersed polyurethane, water-based polyurethane or water-based polyurethane. Waterborne polyurethane uses water as a solvent, has the advantages of no pollution, safety and reliability, excellent mechanical properties, good compatibility, and easy modification, so it is widely used. The most common use of waterborne polyurethane is as a coating. Water-based polyurethane coatings modified by cross-linking have good storage stability, coating mechanical properties, water resistance, solvent resistance and aging resistance, and are similar to traditional solvent-based polyurethane coatings. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/10C08G18/48C08G18/34C08K3/22C09D5/18C09D175/08
Inventor 罗运军尹绚李国平
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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