Core-shell type nanosphere flame retardant and preparation method thereof

A technology of nano-microspheres and flame retardants, applied in the field of core-shell nano-microspheres flame retardants and their preparation, can solve the problems of poor compatibility between flame retardants and polymers, poor flame retardant effect, etc., and achieve improved Mechanical properties and flame retardant efficiency, improved physical and chemical activity, good char formation and smoke suppression effect

Inactive Publication Date: 2020-02-28
JIANGSU ATE DONGTAI NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a core-shell nano microsphere flame retardant and its preparation method to solve the problem of poor flame retardant effect caused by poor compatibility between flame retardants and polymers in the prior art

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  • Core-shell type nanosphere flame retardant and preparation method thereof

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preparation example Construction

[0044] (1) Preparation of suspension:

[0045] Put the sodium silicate solution with a mass fraction of 30% into a beaker, adjust the pH to 5-6 with a concentration of 1mol / L hydrochloric acid, stir and react for 10-15 minutes, heat up to 110-120°C, and continue to stir and react for 1-2 hours , to obtain a suspension;

[0046] (2) Preparation of precursor solution:

[0047] The suspension obtained above, the sodium hydroxide solution with a mass fraction of 5% and the sodium metaaluminate solution with a mass fraction of 30% were mixed and stirred according to a mass ratio of 2:1:8 to obtain a precursor solution;

[0048] (3) Preparation of reaction filter residue:

[0049] Move the precursor solution obtained above into a high-pressure hydrothermal kettle, then add potassium thiocyanate with a mass of 2% of the precursor solution and a citric acid solution with a concentration of 10% of the quality of the precursor solution to 0.5mol / L in the high-pressure hydrothermal ket...

example 1

[0054] (1) Preparation of suspension:

[0055] Put the sodium silicate solution with a mass fraction of 30% into a beaker, adjust the pH to 5 with hydrochloric acid with a concentration of 1 mol / L, stir and react for 10 minutes, heat up to 110°C, and continue to stir and react for 1 hour to obtain a suspension;

[0056] (2) Preparation of precursor solution:

[0057] The suspension obtained above, the sodium hydroxide solution with a mass fraction of 5% and the sodium metaaluminate solution with a mass fraction of 30% were mixed and stirred according to a mass ratio of 2:1:8 to obtain a precursor solution;

[0058] (3) Preparation of reaction filter residue:

[0059] Move the precursor solution obtained above into a high-pressure hydrothermal kettle, then add potassium thiocyanate with a mass of 2% of the precursor solution and a citric acid solution with a concentration of 10% of the quality of the precursor solution to 0.5mol / L in the high-pressure hydrothermal kettle, and ...

example 2

[0064] (1) Preparation of suspension:

[0065] Put the sodium silicate solution with a mass fraction of 30% into a beaker, adjust the pH to 6 with hydrochloric acid with a concentration of 1mol / L, stir and react for 13 minutes, heat up to 115°C, and continue to stir and react for 2 hours to obtain a suspension;

[0066] (2) Preparation of precursor solution:

[0067] The suspension obtained above, the sodium hydroxide solution with a mass fraction of 5% and the sodium metaaluminate solution with a mass fraction of 30% were mixed and stirred according to a mass ratio of 2:1:8 to obtain a precursor solution;

[0068] (3) Preparation of reaction filter residue:

[0069] Move the precursor solution obtained above into a high-pressure hydrothermal kettle, then add potassium thiocyanate with a mass of 2% of the precursor solution and a citric acid solution with a concentration of 10% of the quality of the precursor solution to 0.5mol / L in the high-pressure hydrothermal kettle, and ...

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Abstract

The invention relates to the technical field of preparation of flame retardants, in particular to a core-shell type nanosphere flame retardant and a preparation method thereof. According to the invention, orthosilicic acid generated after a reaction of sodium silicate and hydrochloric acid is used as a silicon source, then an alkali and an aluminum source, namely sodium metaaluminate are added, and a hydrothermal process is performed so as to synthesize nanoscale aluminosilicate zeolite powder; potassium thiocyanate and citric acid are added in the process of a hydrothermal reaction, and underthe action of potassium thiocyanate and through the chelating performance of citric acid, metal ions in the nanoscale zeolite powder leave original crystal lattices and enter a citric acid organic phase, so holes are generated in the original crystal lattices of the nanoscale zeolite powder, which enables the physical and chemical activity of the nanometer zeolite powder to be improved and the adsorption performance of nanoscale zeolite to be enhanced; then, the nanoscale zeolite powder and phosphoric acid are subjected to a mixed reaction, so the core-shell type nanosphere flame retardant isfinally prepared. The core-shell type nanosphere flame retardant has excellent flame retardant effect and good application prospects.

Description

technical field [0001] The invention relates to the technical field of flame retardant preparation, in particular to a core-shell nano microsphere flame retardant and a preparation method thereof. Background technique [0002] With the continuous development of science and technology, many polymer materials with excellent properties such as polystyrene (PS), polyethylene (PE), polymethyl methacrylate (PMMA), polyurethane (PU) have been widely used in electronic , automotive, construction, toys, packaging and other industries. These polymer materials are basically derived from petrochemicals, and are composed of carbon and hydrogen elements, so they are highly flammable. In recent years, major fire accidents directly caused by the ignition of polymer materials are not uncommon, whether at home or abroad. Therefore, most polymer materials must be treated with flame retardant before they are actually used, so that they can reach a certain level of flame retardant before they ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C08K9/10C08K3/34C08L25/06
CPCB01J13/02C08K3/34C08K9/10C08K2201/011C08L25/06C08L2201/02
Inventor 陆建
Owner JIANGSU ATE DONGTAI NEW MATERIALS TECH
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