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Silicon carbide fireproof flame retardant coating for wood materials and preparation method thereof

A fire-retardant, wood-based material technology, used in fire-retardant coatings, coatings, epoxy resin coatings, etc., can solve the problem of insufficient bonding strength between the coating and the substrate, little improvement in the flame-retardant performance of the coating, and affecting the appearance of the substrate. And texture and other issues, to achieve good fire retardant, improve purity, improve the effect of bonding strength

Active Publication Date: 2021-11-02
广东极客亮技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the modification method of nano-silicon carbide mainly increases the polarity of nano-silicon carbide. Although it is beneficial to improve the dielectric properties of the obtained coating, the flame retardancy of the coating is not greatly improved. In actual use, a thicker coating is required to achieve the required flame retardant effect, which affects the appearance and texture of the original substrate, resulting in limited application; moreover, the bonding strength between the coating and the substrate prepared by this patent is insufficient , easy to fall off in actual use, thus affecting the actual flame retardant effect of the coating

Method used

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  • Silicon carbide fireproof flame retardant coating for wood materials and preparation method thereof
  • Silicon carbide fireproof flame retardant coating for wood materials and preparation method thereof
  • Silicon carbide fireproof flame retardant coating for wood materials and preparation method thereof

Examples

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preparation example Construction

[0032] The invention provides a method for preparing a silicon carbide fireproof and flame retardant coating for wood materials, comprising the following steps:

[0033] S1. Adding nano-silicon carbide into hydrochloric acid solution, centrifuging, washing and drying successively after fully stirring, to obtain hydroxylated silicon carbide;

[0034] S2. After diethyl phosphite and carbon tetrachloride are uniformly mixed under ice-bath conditions, then add triethylenediamine and diethanolamine in turn, fully stir at room temperature until the reaction is complete, and obtain a clarified filtrate by filtration; Adding a predetermined amount of boric acid to the clarified filtrate, heating and stirring to make it fully react, to obtain a modified phosphoric acid ester;

[0035] S3. Mix the hydroxylated silicon carbide obtained in step S1 with the modified phosphate ester obtained in step S2, and heat and stir after ultrasonic dispersion to obtain a phosphate flame retardant graf...

Embodiment 1

[0044] This embodiment provides a method for preparing a silicon carbide fireproof and flame retardant coating for wood materials, comprising the following steps:

[0045] S1. Add 100g of nano-silicon carbide powder with a particle size of 50nm to 300mL of hydrochloric acid solution with a concentration of 2mol / L, stir at room temperature for 2h, then centrifuge, and wash the silicon carbide with deionized water until it is neutral, and then place it at 60 Dry at constant temperature for 24 hours at ℃ to obtain hydroxylated silicon carbide.

[0046] S2. After mixing 1 mol of diethyl phosphite and 1 mol of carbon tetrachloride, fully stir for 30 minutes under ice bath conditions, then add 1 mol of triethylenediamine and 1 mol of ethylene glycol amine in turn, and keep stirring at room temperature After reacting for 10 h, a solution containing a white solid was obtained; after filtering the solution, a clear filtrate was obtained. Then boric acid was added to the filtrate to ma...

Embodiment 2～7 and comparative example 1～2

[0058] Embodiments 2 to 7 and Comparative Examples 1 to 2 respectively provide a method for preparing a silicon carbide fireproof and flame retardant coating for wood materials. Compared with Example 1, the difference is that the phosphorous acid in step S2 is changed. The ratio of the amount of diethyl ester to the diethanolamine, the mass ratio of the clarified filtrate to boric acid or the temperature and time of heating and stirring, and the rest of the steps are consistent with Example 1, and will not be repeated here. The preparation parameters corresponding to each embodiment and comparative example are shown in Table 2.

[0059] Table 2 Relevant preparation parameters in Step S2 of Examples 2-7 and Comparative Examples 1-2

[0060]

[0061]

[0062] The peel strength and fire retardant properties of the fire retardant coatings prepared in Examples 2-7 and Comparative Examples 1-2 were tested, and the results are shown in Table 3.

[0063] Table 3 The performance...

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Abstract

The invention provides a silicon carbide fireproof and flame-retardant coating for wood materials and a preparation method thereof. The present invention prepares hydroxylated silicon carbide by adding nano-silicon carbide into hydrochloric acid solution; and reacts diethyl phosphite with carbon tetrachloride, triethylenediamine and diethanolamine, and then adds boric acid, prepared a modified phosphoric acid ester; then blended carboxylated silicon carbide and modified phosphoric acid ester to obtain a phosphoric ester flame retardant grafted with silicon carbide, and coated the flame retardant with epoxy resin On the wooden substrate, a fire-resistant and flame-retardant coating is obtained. Through the above method, the present invention can not only make full use of the synergistic flame retardant effect of boron-phosphorus, so that the prepared modified phosphoric acid ester has a better flame retardant effect; it can also use the grafting of silicon carbide to improve the dispersion of silicon carbide At the same time, it can effectively improve the density and bonding strength of the fire-resistant and flame-retardant coating, so as to achieve the ideal flame-retardant effect under a thinner coating thickness, so as to meet the needs of practical applications.

Description

technical field [0001] The invention relates to the technical field of fire-resistant and flame-retardant coatings, in particular to a silicon carbide fire-resistant and flame-retardant coating for wood materials and a preparation method thereof. Background technique [0002] As an important industrial engineering material, wood material has been widely used in the fields of construction engineering and architectural decoration. However, the shortcomings of wood materials, such as easy combustion, large amount of combustion heat release, and high heat release rate, make it one of the important safety hazards of building fire protection. Therefore, in order to ensure the safe use of wood materials, it is necessary to carry out effective fire retardant treatment to reduce the occurrence of fire. [0003] At present, the fire and flame retardant treatment of wood materials is generally to add flame retardants to wood materials by spraying or dipping. Among them, the method of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/18B05D7/08
CPCB05D7/08C08K2201/011C09D5/18C09D163/00C08K13/06C08K9/02C08K9/04C08K3/34C08K5/521
Inventor 曾伟荣曾伟城
Owner 广东极客亮技术有限公司
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