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Transparent flame-retardant PMMA resin and preparation method thereof

A resin and transparent technology, applied in the field of polymers, can solve the problems of poor heat resistance of PMMA, failure to meet market demand, PMMA dripping, etc., and achieve long-term flame retardancy, increased cross-linking degree, and avoid migration effects

Active Publication Date: 2021-11-26
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] PMMA resin has good electrical insulation performance, wear resistance and weather resistance, but PMMA itself has poor heat resistance and is an extremely flammable material. Its peak heat release rate (PHRR) in the cone calorimetry test can be as high as 1058kW / m 2 , and the burning process of PMMA is often accompanied by serious dripping phenomenon, once burning will cause great harm
[0004] At present, the commonly used method to improve the flame retardancy of PMMA is to blend PMMA with flame retardants to obtain flame retardant PMMA, but this method usually sacrifices the transparency of PMMA, so it will significantly limit its application in the optical field. It cannot meet the existing market demand; therefore, the problem of how to improve the flame retardant performance of PMMA and ensure its high transparency needs to be solved urgently

Method used

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  • Transparent flame-retardant PMMA resin and preparation method thereof
  • Transparent flame-retardant PMMA resin and preparation method thereof
  • Transparent flame-retardant PMMA resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of flame retardant comonomer: Put 300g of phenyl dichlorophosphate, 800g of tetrahydrofuran, and 50g of triethylamine into a three-necked flask with stirring, stir evenly at room temperature and slowly drop in 400g of p-phenol, and raise the temperature to 60°C after the addition is completed After reacting for 12 hours, triethylamine hydrochloride was filtered off after the reaction, and the remaining liquid was distilled under reduced pressure, concentrated to remove most of the residual solvent, then deionized water was added, filtered, and a white solid was precipitated to obtain intermediate C;

[0043] Put 100g of intermediate C, 500g of glycidyl methacrylate, and 1g of potassium hydroxide into the reactor and stir evenly, raise the temperature to 35°C, and react for 5 hours to obtain flame retardant monomer E;

[0044] Preparation of PMMA resin: put 80g of flame retardant monomer E, 800g of methyl methacrylate, 4g of tert-dodecyl mercaptan, and 0.06g o...

Embodiment 2

[0046] Preparation of flame retardant comonomer: put 100g of phenylphosphoryl dichloride, 600g of tetrahydrofuran, and 250g of triethylamine into a three-necked flask with stirring, stir evenly at room temperature and slowly drop in 200g of 4-aminophenol, and heat up after the dropwise addition React at 50°C for 18 hours. After the reaction, triethylamine hydrochloride was filtered off, the remaining liquid was distilled under reduced pressure, concentrated to remove most of the residual solvent, and then deionized water was added, filtered, and a white solid was precipitated to obtain intermediate C;

[0047] Put 30g of intermediate C, 20g of glycidyl methacrylate, and 0.5g of ferric hydroxide into the reactor and stir evenly, raise the temperature to 45°C, and react for 4 hours to obtain flame retardant monomer E;

[0048] Preparation of PMMA resin: Put 10g of flame retardant monomer E, 1200g of methyl methacrylate, 3g of n-octyl mercaptan, and 0.08g of tert-butylperoxy-3,5,5...

Embodiment 3

[0050]Preparation of flame retardant comonomer: 150g of methylphosphoryl dichloride, 1000g of tetrahydrofuran, and 150g of triethylamine were dropped into a three-necked flask with stirring, stirred evenly at room temperature and slowly dripped into 600g of p-carboxyphenol, and the temperature was raised to React at 80°C for 10 hours. After the reaction, triethylamine hydrochloride was filtered off, the remaining liquid was distilled under reduced pressure, concentrated to remove most of the residual solvent, then deionized water was added, filtered, and a white solid was precipitated to obtain intermediate C;

[0051] Put 50g of intermediate C, 100g of glycidyl methacrylate, and 0.3g of potassium carbonate into the reactor and stir evenly, raise the temperature to 55°C, and react for 2 hours to obtain flame retardant monomer E;

[0052] Preparation of PMMA resin: Put 20g of flame retardant monomer E, 1000g of methyl methacrylate, 2g of isooctyl mercaptan, and 0.12g of di-tert-...

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Abstract

The invention relates to a transparent flame-retardant PMMA resin and a preparation method thereof; the preparation method comprises the following steps: synthesizing a flame-retardant monomer, copolymerizing a methyl methacrylate monomer and the flame-retardant monomer, and devolatilizing, extruding and pelletizing the copolymers to obtain the PMMA resin with a stable chemical bond between a flame retardant and a matrix. The PMMA resin prepared by the preparation method disclosed by the invention has relatively high light transmittance and long-acting flame-retardant performance.

Description

technical field [0001] The invention belongs to the field of macromolecules, in particular to a transparent flame-retardant PMMA resin and a preparation method thereof Background technique [0002] Due to its excellent light transmittance, weather resistance and appearance, polymethyl methacrylate (PMMA) is widely used in automobiles, displays, electronic appliances, lighting, billboards and other fields. It has a large room for future development and a bright market prospect. broad. [0003] PMMA resin has good electrical insulation performance, wear resistance and weather resistance, but PMMA itself has poor heat resistance and is an extremely flammable material. Its peak heat release rate (PHRR) in the cone calorimetry test can be as high as 1058kW / m 2 , and the burning process of PMMA is often accompanied by serious dripping, which will cause great harm once burned. [0004] At present, the commonly used method to improve the flame retardancy of PMMA is to blend PMMA...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F230/02C08F2/38
CPCC08F220/14C08F2/38C08F230/02
Inventor 孟磊刘铭刘波孙一峰王磊
Owner WANHUA CHEM GRP CO LTD
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