Nano-silica modified macromolecular flame-retardant charring agent and preparation method thereof

A technology of nano-silica and char-forming agent, which is applied in the field of high-efficiency char-forming agent modified by nano-silica, can solve the problems of affecting the synergistic flame retardant effect of nano-silica and IFR, difficult to disperse uniformly, and poor compatibility.

Inactive Publication Date: 2021-02-05
OECHSLER PLASTIC PROD TAICANG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a commonly used inorganic flame retardant synergist, nano-silica has a synergistic flame-retardant effect with IFR, but it has poor compatibility with polymers and is difficult to uniformly disperse in the matrix. These defects affect the relationship between nano-silica and IFR. Synergistic Flame Retardant Effect of IFR in Polymer Materials

Method used

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  • Nano-silica modified macromolecular flame-retardant charring agent and preparation method thereof
  • Nano-silica modified macromolecular flame-retardant charring agent and preparation method thereof
  • Nano-silica modified macromolecular flame-retardant charring agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add 18g of cyanuric chloride and 200mL of acetone to a 500mL flask, keep the temperature of the system below 5°C, so that the cyanuric chloride is completely dissolved, and at the same time, dissolve 3.05g of piperazine and 4.00g of sodium hydroxide in 20mL Deionized water was added dropwise into the reaction system within 1.5 hours, and the reaction was maintained at 0-5° C. for 3 hours after the addition was completed. After the reaction finished, the reaction system was warmed up to 45°C, then the aqueous solution of piperazine (3.05g) and sodium hydroxide (4.00g) was added dropwise to the above-mentioned reaction system again, at this temperature, the time and The reaction times were 1.5h and 3h, respectively. Finally, after the synthesized product was left to stand and filtered, it was alternately washed three times with ethanol and deionized water, and dried in a vacuum oven at 70° C. for 12 hours to obtain an intermediate.

[0024](2) Disperse 1g of nano-sil...

Embodiment 2

[0027] (1) Add 18g of cyanuric chloride and 200mL of acetone to a 500mL flask, keep the temperature of the system below 5°C, so that the cyanuric chloride is completely dissolved, and at the same time, dissolve 3.05g of piperazine and 4.00g of sodium hydroxide in 20mL Deionized water was added dropwise into the reaction system within 1.5 hours, and the reaction was maintained at 0-5° C. for 3 hours after the addition was completed. After the reaction finished, the reaction system was warmed up to 45°C, then the aqueous solution of piperazine (3.05g) and sodium hydroxide (4.00g) was added dropwise to the above-mentioned reaction system again, at this temperature, the time and The reaction times were 1.5h and 3h, respectively. Finally, after the synthesized product was left to stand and filtered, it was alternately washed three times with ethanol and deionized water, and dried in a vacuum oven at 70° C. for 12 hours to obtain an intermediate.

[0028] (2) Disperse 1g of nano-si...

Embodiment 3

[0031] (1) Add 18g of cyanuric chloride and 200mL of acetone to a 500mL flask, keep the temperature of the system below 5°C, so that the cyanuric chloride is completely dissolved, and at the same time, dissolve 3.05g of piperazine and 4.00g of sodium hydroxide in 20mL Deionized water was added dropwise into the reaction system within 1.5 hours, and the reaction was maintained at 0-5° C. for 3 hours after the addition was completed. After the reaction finished, the reaction system was warmed up to 45°C, then the aqueous solution of piperazine (3.05g) and sodium hydroxide (4.00g) was added dropwise to the above-mentioned reaction system again, at this temperature, the time and The reaction times were 1.5h and 3h, respectively. Finally, after the synthesized product was left to stand and filtered, it was alternately washed three times with ethanol and deionized water, and dried in a vacuum oven at 70° C. for 12 hours to obtain an intermediate.

[0032] (2) Disperse 1g of nano-si...

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Abstract

The invention relates to the technical field of macromolecular flame-retardant charring agents applied to polymer materials, and discloses a nano-silica modified efficient charring agent and a preparation method thereof. According to the charring agent, through nucleophilic substitution, two chlorine atoms on cyanuric chloride are sequentially substituted by piperazine at different temperatures toform a linear macromolecular triazine intermediate with piperazine as a chain extender; and then a temperature is raised, and chlorine on the side group of the intermediate is substituted by substituting piperazine and cyanuric chloride with nano-silica and gamma-aminopropyltriethoxysilane which are connected through a hydroxyl group. The charring agent has the characteristics of good charring properties, high molecular weight, migration resistance, high temperature resistance, no influence on the mechanical properties of a matrix material and the like, solves the problem that a carbon layerwith good compactness and complete morphology cannot be formed due to weak migration resistance of a triazine derivative serving as the charring agent, and can be applied to thermoplastic polyurethaneand polypropylene.

Description

technical field [0001] The invention relates to the technical field of a macromolecular flame-retardant char-forming agent applied to polymer materials, in particular to a nano-silica-modified high-efficiency char-forming agent and a preparation method thereof. Background technique [0002] In the past decades, halogen-containing flame retardants (FRs) have been widely used to limit the flammability of polymeric materials. However, its flame retardant process usually brings many negative effects, such as the generation of corrosive and toxic fumes or volatiles, which will cause great damage to the environment and human health. Therefore, halogen-free flame retardants, especially intumescent flame retardants (IFR), can meet the needs of various industries due to their characteristics of halogen-free, low toxicity, droplet suppression, high flame retardant efficiency and low preparation cost. Due to the need for personal safety and environmental protection, the synthesis of n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K9/06C08K3/36C08L23/12C08L75/04C08K5/5313C08K3/32
CPCC08K9/04C08K9/06C08K3/36C08K5/5313C08K3/32C08K2201/011C08L2201/02C08K2003/323C08L75/04C08L23/12
Inventor 吴唯胡焕波武文政刘冬梅黄建昌
Owner OECHSLER PLASTIC PROD TAICANG
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