High-efficiency halogen-free phosphorus-based gas-phase flame retardant and polymer materials containing the flame retardant

A flame retardant and high-efficiency technology, applied in the field of phosphorus-based gas-phase flame retardants and polymer materials, to achieve the effects of easy operation, easy acquisition and low price

Active Publication Date: 2021-12-17
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the comprehensive flame retardant effect (especially the flame retardant efficiency) of the developed halogen-free flame retardant systems, including phosphorus flame retardants, nitrogen flame retardants, intumescent flame retardants, and inorganic flame retardants, is still comparable to that of bromine There is a big gap between flame retardants

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  • High-efficiency halogen-free phosphorus-based gas-phase flame retardant and polymer materials containing the flame retardant

Examples

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preparation example Construction

[0033] At the same time, the present invention also provides a method for preparing the above-mentioned high-efficiency halogen-free phosphorus-based gas-phase flame retardant. The prepared high-efficiency halogen-free phosphorus-based gas-phase flame retardant is composed of the following components in parts by mass: hindered phenolic antioxidant : 2-2.8 parts, flame retardant intermediate: 8-11 parts; the preparation method of the highly efficient halogen-free phosphorus-based gas-phase flame retardant comprises the following steps:

[0034] Step 1. Prepare an ethanol suspension of hindered phenol and an ethanol solution of a flame retardant intermediate according to the composition by mass of the flame retardant;

[0035] Step 2. Stir and heat the prepared ethanol suspension of hindered phenol, then add the prepared ethanol solution of the flame retardant intermediate to form a mixed solution of the two, and then react;

[0036] Step 3. Rotate the mixed solution after the r...

Embodiment 1

[0043] The high-efficiency halogen-free phosphorus-based gas-phase flame retardant of the present invention and the polypropylene material containing the phosphorus-based gas-phase flame retardant are prepared through this example.

[0044] (1) Add 0.25g of hindered phenol A to a 500mL three-necked flask, and then add 150ml of ethanol solvent to disperse under ultrasonic or high-speed stirring conditions to form a suspension;

[0045] (2) Add 1g of flame retardant intermediate DOPO into a 500mL three-necked flask, then add 200ml of ethanol solvent to disperse under ultrasonic or high-speed stirring conditions until completely dissolved to form a solution;

[0046] (3) Put the ethanol suspension of hindered phenol obtained in (1) in an oil bath and raise it to 60°C under magnetic stirring. After the temperature is constant, put the ethanol solution of the flame retardant intermediate obtained in (2) Slowly added to the oil bath to form a mixed solution of the two, and reacted f...

Embodiment 2

[0050] The high-efficiency halogen-free phosphorus-based gas-phase flame retardant of the present invention and the polypropylene material containing the phosphorus-based gas-phase flame retardant are prepared through this example.

[0051] (1) Add 0.28g of hindered phenol B to a 500mL three-necked flask, and then add 150ml of ethanol solvent to disperse under ultrasonic or high-speed stirring conditions to form a suspension;

[0052] (2) Add 0.8g of flame retardant intermediate DOPO into a 500mL three-necked flask, then add 200ml of ethanol solvent to disperse under ultrasonic or high-speed stirring conditions until completely dissolved to form a solution;

[0053] (3) Put the ethanol suspension of hindered phenol obtained in (1) in an oil bath and raise it to 65°C under magnetic stirring. After the temperature is constant, put the ethanol solution of the flame retardant intermediate obtained in (2) Slowly added to the oil bath to form a mixed solution of the two, and reacted...

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Abstract

The invention relates to the technical field of flame retardant materials, in particular to a high-efficiency halogen-free phosphorus-based gas-phase flame retardant and a polymer material containing the flame retardant, which consists of the following components in parts by mass: hindered phenolic Oxygen agent: 2‑2.8 parts, flame retardant intermediate: 8‑11 parts. A flame-retardant polymer material containing the flame retardant contains the above-mentioned high-efficiency halogen-free phosphorus-based gas-phase flame retardant of the present invention, and the weight percentage of the high-efficiency halogen-free phosphorus-based gas-phase flame retardant in the flame-retardant polymer material The content is 2‑4%. The synthesis of the phosphorus-based gas-phase flame retardant of the present invention is to use the active hydrogen in the intermediate structure of the flame retardant to react with the hydroxyl group in the structure of the hindered phenol, chemically bond the hindered phenol and the intermediate of the flame retardant, and synthesize the flame retardant The agent is halogen-free, non-toxic, does not migrate, and has long-lasting flame retardant performance. The phosphorus-based gas-phase flame retardant of the present invention has a flame-retardant effect on polyolefin materials such as polyethylene and polypropylene, which is comparable to traditional brominated flame retardants.

Description

technical field [0001] The invention relates to the technical field of flame retardant materials, in particular to a high-efficiency halogen-free phosphorus-based gas-phase flame retardant and a polymer material containing the flame retardant. Background technique [0002] Combustion of polymers (especially polyethylene, polypropylene and other polyolefin materials with free radical pyrolysis mode) is a very complex physical and chemical change process, which is affected by four factors: free radical reaction, heat, oxygen and combustibles . A large number of highly active free radicals are produced during the combustion process, especially active hydroxyl radicals (HO·) and hydrogen radicals (H·), which are important reasons for the oxidative degradation of polymers and the acceleration of the combustion process. Therefore, inhibiting / capturing highly active free radicals generated during combustion can interfere with and change the reaction process of polymer degradation,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/134C08K5/20C08K5/25C08K5/5313C08L23/12
CPCC08K5/1345C08K5/20C08K5/25C08K5/5313C08L23/12
Inventor 郭正虹刘兵仁申会员方征平
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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