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Transparent flame retardant organic glass plate and preparation method thereof

A plexiglass plate and transparent technology, applied in the field of transparent flame retardant plexiglass plate and its preparation, can solve the problems of poor flame retardant effect, low limit oxygen index, and difficulty in forming flame retardant effect by flame retardants

Active Publication Date: 2019-10-01
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the limiting oxygen index of polymethyl methacrylate is low, its flame retardancy is poor, it is easy to burn, and it has a high heat release rate, which greatly limits its application.
The flame retardant performance can be improved by adding conventional flame retardants (metal hydroxides, etc.), but most of them have poor flame retardant effects and will greatly reduce the transparency of plexiglass.
And because the combustion of plexiglass is due to the mechanism of free radical chain scission, under the condition of heat, the decomposed monomer encounters the flame and promotes the flame delay. Most of the flame retardants are difficult to form an effective flame retardant effect.

Method used

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  • Transparent flame retardant organic glass plate and preparation method thereof
  • Transparent flame retardant organic glass plate and preparation method thereof
  • Transparent flame retardant organic glass plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A transparent plexiglass flame-retardant board, made of the following raw materials in parts by weight: 72 parts of methyl methacrylate, 19 parts of tris(2-chloroethyl) phosphate, 10 parts of dimethyl methyl phosphonate, 0.03 parts of ABVN initiator, 0.2 parts of AIBN initiator, and 0.3 parts of stearic acid release agent.

[0033] The preparation steps are as follows:

[0034] Step 1, take 72 parts of methyl methacrylate monomer and 0.03 part of ABVN initiator in a beaker and stir and heat;

[0035] Step 2. After the system boils, turn off the heating device and keep stirring for 30 minutes;

[0036] Step 3. After the viscosity of the system reaches 70s, take it out and cool down naturally;

[0037] Step 4. When the system cools down to 27-33°C, add 0.2 parts of AIBN initiator, 0.3 parts of release agent, 19 parts of tris(2-chloropropyl) phosphate, 10 parts of methylphosphonic acid bis Methyl ester, stirred at room temperature for 20 minutes;

[0038] Step 5. Pour ...

Embodiment 2

[0042] A transparent flame-retardant plexiglass plate, made of the following raw materials in parts by weight: 78 parts of methyl methacrylate, 19 parts of tris(2-chloropropyl) phosphate, 10 parts of dimethyl methyl phosphonate, 0.05 parts of ABVN initiator, 0.5 parts of AIBN initiator, and 0.4 parts of stearic acid release agent.

[0043] The preparation steps are as follows:

[0044] Step 1, get 78 parts of methyl methacrylate monomer and 0.05 part of ABVN initiator and stir and heat in a beaker;

[0045] Step 2. After the system boils, turn off the heating device and keep stirring for 30 minutes;

[0046] Step 3. After the viscosity of the system reaches 69-72s, take it out and cool down naturally;

[0047] Step 4. When the system cools down to 27-33°C, add 0.5 parts of AIBN initiator, 0.4 parts of release agent, 19 parts of tris(2-chloropropyl) phosphate, 10 parts of methylphosphonic acid bis Methyl ester, stirred at room temperature for 20 minutes;

[0048] Step 5. Po...

Embodiment 3

[0052] A transparent flame-retardant plexiglass plate is made of the following raw materials in parts by weight: 72 parts of methyl methacrylate, 15 parts of tris(2-chloroethyl) phosphate, 10 parts of dimethyl methyl phosphonate, 0.04 parts of ABVN initiator, 0.3 parts of AIBN initiator, and 0.4 parts of stearic acid release agent.

[0053] The preparation steps are as follows:

[0054] Step 1, get 72 parts of methyl methacrylate monomer and 0.04 part of ABVN initiator and stir and heat in a beaker;

[0055] Step 2. After the system boils, turn off the heating device and keep stirring for 40 minutes;

[0056] Step 3. When the viscosity of the system reaches 71s, take it out and cool down naturally;

[0057] Step 4. When the system cools down to 27-33°C, add 0.3 parts of AIBN initiator, 15 parts of tris(2-chloropropyl) phosphate, 10 parts of dimethyl methylphosphonate, and mold release agent to the system 0.4 parts, stirred at room temperature for 40 minutes;

[0058] Step ...

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PUM

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Abstract

The invention relates to a transparent flame-retardant organic glass plate and a preparation method thereof. The transparent flame-retardant organic glass plate is prepared from the following raw materials in parts by weight: 60-80 parts of methyl methacrylate, 2-35 parts of tris (2-chloroethyl) phosphate, 2-20 parts of dimethyl methylphosphonate, 0.01-0.5 part of azodiisoheptonitrile, 0.01-0.5 part of azodiisobutyronitrile and 0.01-0.5 part of stearic acid. Compared with the prior art, the transparent flame retardant organic glass plate with flame retardant performance reaching UL 94V2 to UL94V0 grade and the transparence over 92% is prepared by adding a phosphorus flame retardant, a plasticizer, a high temperature initiator, a low temperature initiator and a release agent into the methyl methacrylate.

Description

technical field [0001] The invention relates to the technical field of organic glass plates, in particular to a transparent flame-retardant organic glass plate and a preparation method thereof. Background technique [0002] Plexiglass plate (PMMA), also known as acrylic plate, is a polymer compound polymerized from methyl methacrylate. It is an important thermoplastic with early development and mature technology. Plexiglass has excellent chemical stability, mechanical properties, weather resistance and high transparency, and has a beautiful appearance and is easy to dye and process. It is widely used in daily life, commerce, aviation, construction, optical instruments and other fields. [0003] However, the limiting oxygen index of polymethyl methacrylate is low, its flame retardancy is poor, it is easy to burn, and it has a high heat release rate, which greatly limits its application. Its flame retardant performance can be improved by adding conventional flame retardants (...

Claims

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Application Information

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IPC IPC(8): C08F120/14C08F2/44C08K5/521C08K5/5333
CPCC08F2/44C08F120/14C08K5/521C08K5/5333
Inventor 李昀谦窦桂桂杨彤司亚馨王振卫
Owner SHANGHAI INST OF TECH
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