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A flame-retardant and smoke-suppressing flexible polyurethane foam composite material and its preparation method

A soft polyurethane and composite material technology, applied in coating and other directions, can solve problems such as inability to achieve effects, and achieve the effects of delaying the transfer of substances and heat, readily available raw materials, and simple preparation methods.

Active Publication Date: 2022-04-05
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some researchers have used zeolite-like imidazolate framework materials to prepare nanocomposite flame retardants to improve the flame retardancy of polymer materials and achieved certain results. However, they usually cannot achieve good results when used alone.

Method used

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  • A flame-retardant and smoke-suppressing flexible polyurethane foam composite material and its preparation method
  • A flame-retardant and smoke-suppressing flexible polyurethane foam composite material and its preparation method
  • A flame-retardant and smoke-suppressing flexible polyurethane foam composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of flame-retardant and smoke-suppressing flexible polyurethane foam composites

[0023] a) Preparation of water-soluble phenolic resin solution: molten phenol and formaldehyde aqueous solution are mixed in a molar ratio of 1:2, stirred mechanically, then weighed NaOH according to 2% of the total mass of phenol and formaldehyde, reacted at 65°C for 50min, and raised the temperature to Continue to react at 85°C for 30 minutes to obtain a water-soluble phenolic resin; dissolve the water-soluble phenolic resin in deionized water, adjust the pH value with 1mol / L NaOH solution so that the pH value of the solution is 9.0, stir for 20 minutes, and prepare a 0.5wt% water-soluble phenolic resin solution;

[0024] Preparation of Co-ZIF-L suspension: Co(NO 3 )·6H 2 O was dissolved in deionized water to prepare a solution A with a concentration of 0.034mol / L, and then dimethylimidazole was dissolved in deionized water to prepare a solution B with a concentration of ...

Embodiment 2

[0032] 1. Preparation of flame-retardant and smoke-suppressing flexible polyurethane foam composites

[0033] a) Preparation of water-soluble phenolic resin: molten phenol and formaldehyde aqueous solution were mixed at a molar ratio of 1:2.5, mechanically stirred, and then NaOH was weighed according to 2% of the total mass of phenol and formaldehyde. After reacting at 65°C for 50 minutes, raise the temperature to 85°C and continue the reaction for 30 minutes to obtain a water-soluble phenolic resin; dissolve the water-soluble phenolic resin in deionized water, adjust the pH value with 1mol / L NaOH solution so that the pH value of the solution is 10.0, and stir 20min, be prepared into 0.75wt% water-soluble phenolic resin solution;

[0034] Preparation of Co-ZIF-L suspension: Co(NO 3 ) 2 ·6H 2 O was dissolved in deionized water to prepare a solution A with a concentration of 0.034mol / L, and then dimethylimidazole was dissolved in ionized water to prepare a solution B with a c...

Embodiment 3

[0043] 1. Preparation of flame-retardant and smoke-suppressing flexible polyurethane foam composites

[0044] a) Preparation of water-soluble phenolic resin solution: molten phenol and formaldehyde aqueous solution are mixed in a molar ratio of 1:3, stirred mechanically, and then weighed NaOH according to 2% of the total mass of phenol and formaldehyde, reacted at 65°C for 50min, and raised the temperature to Continue to react at 85°C for 30 minutes to obtain a water-soluble phenolic resin; dissolve the water-soluble phenolic resin in deionized water, adjust its pH value with 1mol / L NaOH solution so that the pH value of the solution is 9.5, stir for 20 minutes, and prepare a phenolic resin with a mass fraction of 1 wt%. Water-soluble phenolic resin solution;

[0045] Preparation of Co-ZIF-L suspension: Co(NO 3 ) 2 ·6H 2 O was dissolved in deionized water to prepare a solution A with a concentration of 0.034mol / L, and then a certain mass of dimethylimidazole was dissolved in...

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Abstract

The invention belongs to the field of flame-retardant and smoke-suppressing materials, in particular to a flame-retardant and smoke-suppressing flexible polyurethane foam composite material. Got it. The present invention also relates to a method for preparing the above composite material. The water-soluble phenolic resin and Co-ZIF-L are used to form a flame retardant coating on the surface layer of the flexible polyurethane foam through self-assembly. On the one hand, the phenolic resin is formed during the combustion process. The carbon layer has a certain physical barrier effect; on the other hand, the Co‑ZIF‑L nanosheets have a lamellar barrier effect, and the nanosheets contain Co element, which is generated during the combustion process. 3 O 4 It can catalyze the formation of more and dense carbon layers, so as to play the role of flame retardant and smoke suppression. The preparation method of the invention has the advantages of easy-to-obtain raw materials, simple method and environmental protection.

Description

technical field [0001] The invention belongs to the field of flame-retardant and smoke-suppressing materials, in particular to a flame-retardant and smoke-suppressing soft polyurethane foam composite material and a preparation method thereof. Background technique [0002] Flexible polyurethane foam (FPUF) has many excellent properties such as light weight, softness, breathability, good resilience, and sound insulation, and is widely used in industrial and civil fields. However, FPUF has a porous structure and is highly flammable. The oxygen index of FPUF without flame retardant treatment is only about 18%; the low density and high porosity make it have good air circulation, and it can pass through the cells when burning Oxygen is continuously supplied, so it is easy to burn and drip; in addition, a large amount of toxic fumes, such as CO, HCN, NO, etc., will be produced during combustion, which will bring difficulties to personnel evacuation and fire fighting. Therefore, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/42C08J9/40C08J9/36C08L75/04C08L61/06C08K7/26
CPCC08J9/42C08J9/40C08J9/365C08J2375/04C08J2461/06C08K7/26C08K2201/011
Inventor 徐文总陈瑞范良捷闫弘毅王海明
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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