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app-Hierarchical Molecular Sieve Composite Flame Retardant and Its Preparation Method and Application

A composite flame retardant, 1.APP- technology, applied in the field of halogen-free flame retardants, can solve problems such as increasing the difficulty of fire rescue, threats to people's lives and property safety, incomplete combustion of wood, etc., and achieve good flame retardancy and Toxic attenuation performance, good adsorption of toxic gases, and the effect of reducing heat release

Active Publication Date: 2021-03-12
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the flammability of wood materials, untreated wood-based panels can easily cause fires, posing a great threat to people's lives and property safety
[0003] Ammonium polyphosphate is an inorganic phosphorus-based flame retardant, which is widely used in flame retardant of wood materials because of its halogen-free, non-toxic, and cheap characteristics. The amount of fuel added, which causes the mechanical properties of wood-based panel materials to decline
In addition, APP blocks the oxygen supply when it acts, causing the wood to burn incompletely, producing smoke and a large amount of toxic gases such as CO, which is extremely harmful to the human body and increases the difficulty of fire rescue.

Method used

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  • app-Hierarchical Molecular Sieve Composite Flame Retardant and Its Preparation Method and Application
  • app-Hierarchical Molecular Sieve Composite Flame Retardant and Its Preparation Method and Application
  • app-Hierarchical Molecular Sieve Composite Flame Retardant and Its Preparation Method and Application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0025] Example 1-3 APP-hierarchical molecular sieve composite flame retardant and its preparation

[0026] The formulation of APP-hierarchical molecular sieve composite flame retardant is as follows:

[0027] Hierarchical 4A Molecular Sieve (g) 85% phosphoric acid aqueous solution (g) Urea (g) Example 1 3 81.19 40.14 Example 2 4 81.19 40.14 Example 3 5 81.19 40.14

[0028] The preparation method of the composite flame retardant described in Example 1 is as follows: 3 g of hierarchically porous 4A molecular sieves are placed in 81.19 g of 85% phosphoric acid aqueous solution, and dispersed for 30 min with a high-speed shear homogenizer (rotating speed 10,000 rpm) until the dispersion is uniform and no Agglomerated particles appear. Add the mixture of phosphoric acid and hierarchical pore molecular sieve into a three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, start stirring and heat at the same time, th...

Embodiment 4

[0030] The performance test of embodiment 4 flame retardant

[0031] Mix the composite flame retardant prepared in Examples 1-3 and the ordinary APP flame retardant of Comparative Example 1 with wood flour, and add phenolic adhesive. The amount of flame retardant added is 10% of the mass of wood flour. The amount of adhesive added is 10% of the mass of wood flour. After mixing evenly, place it in a mold to press the flame-retardant particle board. The hot-pressing temperature is 150° C., the pressure is 1.8-2.5 MPa, and the hot-pressing time is 10 minutes to obtain a composite wood-based board. Performance testing of composite wood-based panels.

[0032] Wherein, the preparation of the ordinary APP flame retardant of Comparative Example 1 is as follows: add 81.19g of 85% phosphoric acid aqueous solution into a three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, start stirring and heat at the same time, and the heating rate is 2-3°C / min; when th...

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Abstract

The invention provides an APP (ammonium polyphosphate) / hierarchical porous molecular sieve composite flame retardant and a preparation method and application thereof. The flame retardant herein is made from, by weight, 1-6 parts of a hierarchical porous molecular sieve, 80-90 parts of 80-95% of phosphoric acid solution, and 40-50 parts of urea. The hierarchical porous molecular sieve is utilized herein as an APP synergist to prepare the APP / hierarchical porous molecular sieve composite flame retardant. The hierarchical porous molecular sieve is dispersed evenly in concentrated phosphoric acid;APP synthesis is performed; the synergist is brought to full contact with APP to gain full synergy. When an artificial board is treated with the composite flame retardant herein, the hierarchical porous molecular sieve catalyzes decomposition of APP to co-catalyze dewatering of wood to form carbon, thereby forming a compact continuous protective carbon layer which protects inner wood and reducesheat release; hierarchical pore of the molecular sieve can well adsorb toxic gas; under the joint action of the carbon and the pores, good flame retardance and detoxifying performance are imparted tothe artificial board.

Description

technical field [0001] The invention belongs to the technical field of halogen-free flame retardants, and in particular relates to an APP-hierarchical molecular sieve composite flame retardant and its preparation method and application. Background technique [0002] Wood-based panels are natural renewable, recyclable, and biodegradable biomaterials. They have excellent environmental characteristics and processability, and are loved by people. Therefore, they are widely used in the fields of furniture, flooring, and decoration. However, due to the flammability of wood materials, untreated wood-based panels can easily cause fires, posing a great threat to people's lives and property safety. [0003] Ammonium polyphosphate is an inorganic phosphorus-based flame retardant, which is widely used in flame retardant of wood materials because of its halogen-free, non-toxic, and cheap characteristics. The amount of fuel added, which causes the mechanical properties of wood-based pane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/52
Inventor 王明枝张少迪吴宇晖张明昌曹金珍王望马尔妮彭尧林剑商俊博李黎
Owner BEIJING FORESTRY UNIVERSITY
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