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A preparation method of hydrophobic tannin-modified polyphosphazene nanomaterials and its application in fire-resistant and flame-retardant coatings

A technology of fire-resistant and flame-retardant coatings and nano-materials, applied in the field of coatings, can solve problems such as poor water resistance, achieve the effects of improving coating performance, reducing impact, and inhibiting heat release and smoke generation

Active Publication Date: 2022-05-20
BEIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Usually, the flame retardant content in the fireproof coating is high, the water resistance is poor, and the water resistance of the filler is also poor. The coating is easy to absorb water and makes the fireproof coating soft. The purpose of the present invention is to overcome the defect of poor water resistance of the fireproof coating and provide a Hydrophobic tannins modify polyphosphazene nanomaterials. The polyphosphazene nanomaterials are obtained by tannin modification by precipitation polymerization. The ability of tannins to complex with metal ions improves the smoke suppression of the material, further Use long-chain alkyl compounds to modify the material hydrophobically, which improves the water resistance of the material and can be used in water-based fireproof coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of polyphosphazene nanomaterials by precipitation polymerization: Add 3.5g of hexachlorotripolyphosphazene and 6.0g of catechol into 250mL of acetonitrile, sonicate for 30min, add 25mL of trimethylamine, sonicate for 4h at 50°C, centrifuge, and precipitate with Wash with water, ethanol, acetone and water respectively, and dry to obtain the product.

[0039] Superhydrophobic modification: put the obtained product into 3.2mmol L -1 100mL ferric chloride solution, stirred for 4 hours, filtered, and the dried product was put into 2.0mg mL -1 In 50 mL of alcohol solution of dodecyl mercaptan compound, after stirring for 4 hours, filter, wash with alcohol, and dry to obtain tannin-modified polyphosphazene nanomaterials.

[0040]Preparation of paint: Weigh 42g of water-based acrylic resin, 37g of tannin-modified polyphosphazene nanomaterials, 11g of titanium dioxide, 2.5g of expandable graphite, 4.5g of zinc oxide, 0.5g of anti-settling agent, 0.4g of leveling age...

Embodiment 2

[0043] Preparation of polyphosphazene nanomaterials by precipitation polymerization: Add 3.5g of hexachlorotrimeric phosphazene and 5g of bayberry tannin into 250mL of acetonitrile, sonicate for 30min, add 25mL of trimethylamine, sonicate for 4h at 50°C, centrifuge, and precipitate with anhydrous Wash with ethanol, acetone and water respectively, and dry to obtain the product.

[0044] Superhydrophobic modification: put the obtained product into 3.2mmol L -1 In 100mL of copper chloride solution, stir for 4 hours, filter, and dry the product into 2.0mg mL -1 1-tetradecylmercaptan alcohol solution 50mL, after stirring for 4 hours, filter, wash with alcohol, and dry to obtain tannin-modified polyphosphazene nanomaterials.

[0045] Preparation of paint: Weigh 38g of water-based acrylic resin, 38g of tannin-modified polyphosphazene nanomaterials, 10g of titanium dioxide, 4g of expandable graphite, 2g of nano-titanium dioxide, 6g of zinc oxide, 0.4g of anti-settling agent, and 0.3g...

Embodiment 3

[0048] Preparation of polyphosphazene nanomaterials by precipitation polymerization: add 3.5g of hexachlorotrimeric phosphazene and 6g of gallic acid into 250mL of acetonitrile, sonicate for 30min, add 25mL of trimethylamine, sonicate for 4h at 50°C, centrifuge, and precipitate with absolute ethanol , acetone, and water, respectively, and dried to obtain the product.

[0049] Superhydrophobic modification: put the obtained product into 3.2mmol L -1 100mL of ferrous sulfate solution, stirred for 4 hours, filtered, and the dried product was put into 2.0mg mL -1 In 50 mL of alcohol solution of 1-octylthiol, after stirring for 4 hours, filter, wash with alcohol, and dry to obtain the product, which is a tannin-modified polyphosphazene nanomaterial.

[0050] Preparation of paint: Weigh 38g of water-based acrylic resin, 35g of tannin-modified polyphosphazene nanomaterials, 12g of titanium dioxide, 3g of expandable graphite, 4g of nano-titanium dioxide, 6g of zinc oxide, 0.6g of ant...

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PUM

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Abstract

The invention belongs to the technical field of coatings, and discloses a preparation method of hydrophobic tannin-modified polyphosphazene nanometer material and its application in fire-resistant and flame-retardant coatings. The preparation method of the polyphosphazene nanomaterial comprises the following steps: (1) Precipitation polymerization method for preparing the polyphosphazene nanomaterial: adding hexachlorotrimeric phosphazene and plant tannin to acetonitrile and ultrasonic treatment, then adding trimethylamine, Centrifuge after ultrasonic treatment, wash the precipitate, and dry to obtain the product; (2) Superhydrophobic modification: put the obtained product in a metal salt solution, stir, filter, dry, put it in an alcohol solution of a long-chain thiol compound, and stir it Filter, wash with alcohol, and dry to obtain hydrophobic tannin-modified polyphosphazene nanomaterials. The polyphosphazene nanomaterial is obtained by modifying tannins through precipitation polymerization. The ability of tannins to complex with metal ions is used to improve the smoke suppression performance of the material. The material is further hydrophobically modified by long-chain alkyl compounds. Improved water resistance of the material.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a method for preparing a hydrophobic tannin-modified polyphosphazene nanometer material and its application in fire-resistant and flame-retardant coatings. Background technique [0002] Phosphorus and nitrogen elements in polyphosphazene molecules are both flame retardant elements. As a new organic and inorganic polymer material, the abundant phosphorus and nitrogen atoms in the main chain endow it with excellent halogen-free flame retardant properties. Adding it to the substrate will Reduce the heat release rate and smoke release, and the N produced during the combustion degradation process 2 , NH 3 Such as flame retardant, low toxicity, non-corrosive gas can reduce the concentration of flammable gas. In addition, the adjustable type and ratio of polyphosphazene molecular side groups make this polymer material have various other characteristics. In practical applications, peo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G79/025C09D5/18C09D133/04C09D185/02
CPCC08G79/025C09D5/185C09D133/04C09D185/02C08L2201/02C08K2003/2296C08L85/02C08K13/06C08K3/22C08L33/04
Inventor 王岩
Owner BEIHUA UNIV