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Preparation method of hydrostatic-pressure-resistant flame-retardant waterborne polyurethane and application

A water-based polyurethane, hydrostatic pressure-resistant technology, used in fiber types, textiles and papermaking, fiber processing, etc., can solve the problems of high viscosity in prepolymerization, difficult reaction control, affecting application performance and mechanical properties, and achieve storage stability. Good, safe adhesion, good flame retardant effect

Active Publication Date: 2015-12-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0003] Patent CN102418274B discloses a method for preparing an anionic water-based polyurethane fabric coating agent with high hydrostatic pressure resistance. The polyurethane fabric coating agent is prepared in the form of an external emulsification method under the action of emulsifier sodium dodecylbenzenesulfonate. This method is easy to make the water-based polyurethane fabric coating agent unstable in storage because of the need to add an emulsifier, which affects application performance (such as feel, mechanical properties, etc.), and because the polyurethane fabric coating agent is a linear structure, its hydrostatic pressure resistance There are also big problems in the long-term maintenance of
In an article published by Li Haibei et al. (Li Haibei, Zhang Dalun, Luo Yunjun, etc. Development of anionic waterborne polyurethane fabric coating agent with high hydrostatic pressure resistance [J]. Printing and Dyeing Auxiliaries, 2004, 21 (1): 45-47), although the water-based polyurethane fabric coating agent with high hydrostatic pressure resistance has been prepared by internal crosslinking technology, and the hydrostatic pressure resistance value can reach 21600Pa, but the addition of the crosslinking agent can easily lead to prepolymerization Viscosity is too high, making the reaction difficult to control
Chen He of Luo Yunjun's research group used a phosphorus-containing reactive halogen-free flame retardant ExolitOP550 to synthesize a series of halogen-free flame-retardant water-based polyurethanes. B1 level in the test, however, its hydrostatic pressure resistance cannot meet market requirements
[0004] At present, polyurethane with hydrostatic pressure resistance and flame retardancy has not been reported yet.

Method used

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  • Preparation method of hydrostatic-pressure-resistant flame-retardant waterborne polyurethane and application
  • Preparation method of hydrostatic-pressure-resistant flame-retardant waterborne polyurethane and application

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Take 21g of PTMG with a molecular weight of 2000, 4.05g of trihydroxypolyether N330 and 4.6g of dimethylol propionic acid in a four-neck flask, dehydrate under vacuum at 120°C for 1 hour, then cool down naturally to 60°C, blow nitrogen, and install condensing reflux tube, add 40g of methyl ethyl ketone, after the temperature stabilizes, add 26.25g of liquefied MDI dropwise into the constant pressure dropping funnel, control the speed, finish adding in about 0.5h, remove the nitrogen, raise the temperature to 75°C, react for about 2h, and the test shows that in the solution The -NCO content is close to the theoretical value, then add 15.1g ExolitOP550, react for about 3 hours, the test shows that the -NCO content in the solution is close to the theoretical value, then add 1g of 1,4-butanediol, react for about 1 hour, the test shows that the -NCO content in the solution is close to the theoretical value After cooling down to room temperature, 3.5g of triethylamine was adde...

Embodiment 2

[0042] Take 33g of PTMG with a molecular weight of 2000, 6.35g of trihydroxypolyether N330 and 4.6g of dimethylol butyric acid in a four-neck flask, dehydrate under vacuum at 100°C for 1.5h, then cool down naturally to 70°C, blow nitrogen, and install condensation Add 40g of tetrahydrofuran to the reflux tube. After the temperature is stable, add 26.25g of MDI dropwise through the constant pressure dropping funnel, control the speed, and finish adding in about 0.5h. Remove the nitrogen, raise the temperature to 85°C, and react for about 1.5h. The test shows that in the solution- The NCO content is close to the theoretical value, then add 8.3g ExolitOP550, react for about 3 hours, the test shows that the -NCO content in the solution is close to the theoretical value, then add 1g of 1,4-butanediol, react for about 0.5h, and the test shows that the -NCO content in the solution is close to the theoretical value After cooling down to room temperature, 3.5g of triethylamine was added...

Embodiment 3

[0045] Take 33.8g of PPG with a molecular weight of 2000, 9g of trihydroxypolyether N330 and 4.6g of dimethylolpropionic acid in a four-neck flask, dehydrate under vacuum at 100°C for 1.5h, then cool down naturally to 75°C, blow nitrogen, and install condensation Add 50g of tetrahydrofuran to the reflux tube. After the temperature is stable, add 18.3g of TDI dropwise through the constant pressure dropping funnel, control the speed, and finish adding in about 0.5h. Remove the nitrogen, raise the temperature to 80°C, and react for about 2h. The test shows the -NCO content in the solution. Close to the theoretical value, then add 7.8g ExolitOP550, react for about 3.5 hours, the test shows that the -NCO content in the solution is close to the theoretical value, then add 1g of diethylene glycol, react for about 1 hour, the test shows that the -NCO content in the solution is close to the theoretical value, Cool down to room temperature, add 3.5g of triethylamine for neutralization fo...

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Abstract

The invention relates to a preparation method of hydrostatic-pressure-resistant flame-retardant waterborne polyurethane and application and belongs to the technical field of the textile chemical industry. The method comprises the following steps: mixing polyether diol, hydrophilic chain extender and trihydroxy polyether, then performing vacuum dehydration, adding solvent for dilution under the protection of nitrogen, and then adding aromatic isocyanate for reaction to obtain a prepolymer A; adding reactive phosphorus-containing flame retardant into the prepolymer A for reaction to obtain solution B; adding lipophilic chain extender into the solution B for reaction to obtain solution C; adding triethylamine into the solution C for neutralization, adding deionized water under agitation for emulsification, standing and then removing the solvent to obtain the waterborne polyurethane. The prepared waterborne polyurethane can be used as fabric coating agent and is applied to the field of textile coating. Especially when the waterborne polyurethane is applied to polyester low-stretch yarn coating, the hydrostatic-pressure-resistant performance is good and the value of the resisted hydrostatic pressure can reach 10 to 23KPa; the flame-retardant effect is good and the waterborne polyurethane can pass class B1 of GB / T5455-1997 textile combustion performance vertical tests.

Description

technical field [0001] The invention relates to a preparation method and application of hydrostatic pressure-resistant flame-retardant water-based polyurethane, which belongs to the technical field of textile chemicals. Background technique [0002] Water-based polyurethane fabric coating agent is a polymer compound that can be evenly coated on the surface of the fabric. It can form one or more layers of film on the surface of the fabric through adhesion. It can not only improve the appearance and style of the fabric, but also make The fabric is functionalized so that it has special functions such as waterproof, moisture permeability, and flame retardant. Water-based polyurethane uses water as a dispersant, which has the advantages of environmental friendliness, non-toxicity and safety. However, the single-functional waterborne polyurethane has many disadvantages in the application of textile finishing, such as poor hydrostatic pressure resistance, flammability, poor weathe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/568C08G18/76C08G18/66C08G18/48C08G18/34C08G18/32C08G18/12D06M101/32
Inventor 罗运军柴春鹏冯静静葛震唐本鑫
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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