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Flame-retardant waterborne polyurethane material

A water-based polyurethane, flame-retardant technology, applied in the field of polyurethane, can solve the problems of halogen harmful substances polluting the environment, poor compatibility between flame retardants and substrates, easy free coating surface, etc., to achieve good flame retardancy and self-dispersion The effect of improving compatibility, stability, and good thermal insulation performance

Inactive Publication Date: 2021-12-10
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to achieve the flame retardant performance of the product, halogen-containing flame-retardant substances are usually added to the material system. Although these halogen-containing flame-retardant substances have good flame-retardant effects, too much halogen will produce harmful substances that are difficult to degrade and pollute the environment.
And although adding too much flame retardant can improve the flame retardant performance, there are also many defects, especially in the waterborne polyurethane system, too much flame retardant has poor compatibility with the substrate, and it is easy to dissociate on the surface of the coating, affecting the coating. Formation

Method used

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  • Flame-retardant waterborne polyurethane material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The polyurethane preparation process is as follows: 10% PEG-2000, 7% dimethylol propionic acid, 1% ethylene glycol chain extender and 1% N-methylpyrrolidone are added to the reaction flask, heated to 50 ° C and stirred 1h, then add 8-18% of 2,4-toluene diisocyanate, heat up to 80°C for 90 minutes; then add 4-5% polyethylene adipate propylene glycol ester diol, continue stirring for 60 minutes, cool After reaching below 50°C, add DMF to adjust the viscosity of the system, and finally add water to quickly emulsify to make the system solid content 30%.

[0029] Described composite flame retardant:

[0030] S1: Add the acidified attapulgite to ethanol for ultrasonic treatment, then add an equal mass of KH-570, stir and disperse evenly, then raise the temperature to 60-70°C, stir for 4-5h; centrifuge, wash with ethanol Collect solid and dry to obtain solid A;

[0031] S2: Add 0.1mol phenyl dichlorophosphate and 50ml acetone to the reaction flask, place the reaction flask i...

Embodiment 2

[0037] The polyurethane preparation process is as follows: 15% PEG-2000, 9% dimethylol propionic acid, 2% ethylene glycol chain extender and 3% N-methylpyrrolidone are added to the reaction bottle, heated to 50 ° C and stirred 1h, then add 10% 2,4-toluene diisocyanate, heat up to 80°C and react for 90min; then add 5% polyethylene adipate propylene glycol ester diol, continue stirring for 60min, cool to below 50°C Then add DMF to adjust the viscosity of the system, and finally add water to quickly emulsify to make the system solid content 35%.

[0038] Described composite flame retardant:

[0039] S1: Add the acidified attapulgite to ethanol for ultrasonic treatment, then add an equal mass of KH-570, stir and disperse evenly, then raise the temperature to 60-70°C, stir for 4-5h; centrifuge, wash with ethanol Collect the solid and dry it to obtain solid A; put 0.5g of the collected solid A into the reaction flask, add 0.1g of ammonium persulfate, 0.05g of sodium bisulfite and w...

Embodiment 3

[0044] The polyurethane preparation process is as follows: 15% PEG-2000, 9% dimethylol propionic acid, 2% ethylene glycol chain extender and 3% N-methylpyrrolidone are added to the reaction bottle, heated to 50 ° C and stirred 1h, then add 10% 2,4-toluene diisocyanate, heat up to 80°C and react for 90min; then add 5% polyethylene adipate propylene glycol ester diol, continue stirring for 60min, cool to below 50°C Then add DMF to adjust the viscosity of the system, and finally add water to quickly emulsify to make the system solid content 35%.

[0045] Described composite flame retardant:

[0046] S1: Add the acidified attapulgite to ethanol for ultrasonic treatment, then add an equal mass of KH-570, stir and disperse evenly, then raise the temperature to 60-70°C, stir for 4-5h; centrifuge, wash with ethanol Collect the solid and dry it to obtain solid A; add 0.25 g of the collected solid A to the reaction flask, add 0.1 g of ammonium persulfate, 0.05 g of sodium bisulfite and...

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Abstract

The invention relates to a flame-retardant waterborne polyurethane material. The flame-retardant waterborne polyurethane material comprises a composite flame retardant and polyurethane, the composite flame retardant is an attapulgite composite material and comprises anion modified attapulgite, cation modified attapulgite and modified nano montmorillonite; the anion modified attapulgite is prepared by the following steps: firstly, grafting KH-570 to acidified attapulgite, and then polymerizing an unsaturated alkenyl sulfonic acid compound; the cationic modified attapulgite is prepared by introducing unsaturated double bonds to acidified attapulgite through a chlorine substitution reaction of phenyl dichlorophosphate and then polymerizing with an unsaturated alkenyl ammonium chloride compound. According to the invention, attapulgite is modified step by step, so that the attapulgite has good flame retardance and self dispersibility, and can be stably dispersed in a coating system through electrical attraction and steric hindrance effect; the modified nano montmorillonite powder has a synergistic effect, so that the compatibility stability with a polyurethane emulsion system is further improved, and the toughness of the coating is improved.

Description

technical field [0001] The invention relates to the technical field of polyurethane, in particular to a flame-retardant water-based polyurethane material. Background technique [0002] Polyurethane resin is a kind of polymer material that is widely used. Polyurethane is used in many fields such as coatings, adhesives, and textiles. Due to the increasingly stringent environmental protection requirements and the need to minimize the use of volatile organic solvents, waterborne polyurethane dispersions have attracted more and more attention. Water-based polyurethane uses water as a solvent, which has the advantages of no pollution, safety and reliability, and good mechanical properties. However, with the development of industrialization and the improvement of people's living standards, people pay more attention to the multifunctional performance of products, such as flame-retardant architectural coatings and flame-retardant decorative coatings, which are favored by consumers. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D151/10C09D5/18C09D7/62C08F292/00C08F212/14C08F220/58C08F220/20C08F228/02C08F285/00C08F220/34C08F226/02
CPCC09D175/04C09D5/18C09D7/62C08F285/00C08F292/00C08K2201/011C08K2003/2296C08L2201/02C08L51/10C08K9/10C08K9/04C08K3/346C08K3/22C08K3/16C08K3/36C08F212/30C08F220/585C08F220/20C08F228/02C08F220/34C08F226/02
Inventor 陈海燕束影徐洁蔡耿焘
Owner YANGZHOU POLYTECHNIC INST
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