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Flame-retardant organic glass and preparation method thereof

A technology of plexiglass and organic solvent, applied in the field of flame retardant plexiglass and its preparation, can solve the problems of plexiglass transparency, flame retardant thermal and mechanical properties being difficult to improve simultaneously

Active Publication Date: 2021-09-24
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to achieve the purpose of expanding organic glass to replace toughened glass in high-rise buildings, the present invention proposes a method for preparing flame-retardant organic glass that is synergistically modified by SAN / phosphate ester / POSS, and solves the problem of using SAN, phosphoric acid ester or POSS alone in organic glass. It is difficult to improve the transparency, flame retardancy, thermal and mechanical properties of glass

Method used

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preparation example Construction

[0041] The preparation method of the flame-retardant plexiglass provided by the embodiment of the present invention comprises the following steps:

[0042] Step 1, preparation of P / Si compound flame retardant slurry:

[0043] 1a) cage silsesquioxane (POSS) synthesis:

[0044]Use organosilicon compound silane coupling agent as silicon source, low-boiling organic compound as solvent, deionized water as co-solvent, react at 30-40℃ for 24-36h under acidic pH value of 0.3-2.0, and hydrolyze and condense to obtain white crystals Product; the mass ratio of organosilicon compound, solvent, and deionized water is 1:(6-10):(3-5).

[0045] Wherein, the silane coupling agent is one or more of vinyltrimethoxysilane, aminopropyltriethoxysilane or glycidylpropoxytrimethylsilane.

[0046] The low boiling point solvent is one or more mixtures in chloroform, acetone, methanol or ethanol.

[0047] 1b) Preparation of P / Si compound flame retardant slurry:

[0048] Mix the white crystalline pro...

Embodiment 1

[0064] 1) Preparation of P / Si compound flame retardant slurry:

[0065] Cage silsesquioxane (POSS) synthesis:

[0066] According to the mass ratio of 1:6:5, vinyltrimethoxysilane, chloroform and deionized water were reacted at pH 1.0 and 30° C. for 24 hours, and a white crystalline product was obtained through hydrolysis and condensation.

[0067] Preparation of P / Si compound flame retardant slurry:

[0068] Mix the white crystalline product with monohalophosphate at a mass ratio of 0.3:1, and grind for 4 hours to obtain a paste-like P / Si compound flame retardant slurry with a fineness of 10 μm;

[0069] 2) PMMA slurry preparation:

[0070] Mix methyl methacrylate MMA, styrene acrylonitrile copolymer SAN, and dibenzoyl peroxide at a mass ratio of 100:30:0.12, polymerize in a water bath at 85°C for 20 minutes, and cool to room temperature to obtain PMMA slurry ;

[0071] 3) Flame retardant plexiglass:

[0072] 3a) Dilute the P / Si composite flame retardant slurry with monoh...

Embodiment 2

[0078] 1) Preparation of P / Si compound flame retardant slurry:

[0079] Cage silsesquioxane (POSS) synthesis:

[0080] According to the mass ratio of 1:10:3, aminopropyltriethoxysilane, methanol, ethanol and deionized water were reacted at 35°C for 36 hours at a pH value of 2.0, and a white crystalline product was obtained through hydrolysis and condensation;

[0081] Preparation of P / Si compound flame retardant slurry:

[0082] Mix the white crystalline product with diphenyl phosphate at a mass ratio of 0.5:1, and grind for 5 hours to obtain a paste-like P / Si compound flame retardant slurry with a fineness of 1 μm;

[0083] 2) PMMA slurry preparation:

[0084] Mix methyl methacrylate MMA, styrene acrylonitrile copolymer SAN, and organic peroxy compound (lauroyl peroxide) at a mass ratio of 100:15:0.24, polymerize in a water bath at 95°C for 10 minutes, and cool to room temperature. PMMA slurry can be obtained;

[0085] 3) Flame retardant plexiglass:

[0086] 3a) Dilute t...

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Abstract

The invention discloses flame-retardant organic glass and a preparation method thereof. The preparation method comprises preparation of P / Si compound flame retardant slurry, preparation of PMMA slurry and preparation of the flame-retardant organic glass. The P / Si compound flame retardant slurry is a stable dispersion formed by mixing and grinding POSS and phosphate, the PMMA slurry is an SAN dissolved prepolymer, and the flame-retardant organic glass is prepared from the PMMA slurry and the P / Si compound flame retardant slurry through an improved traditional intermittent casting method for producing PMMA. The organic glass produced by the method has transparent, flame-retardant, thermal and mechanical properties, and can meet the transparent and flame-retardant application requirements of the organic glass; the non-transparent microporous PMMA plate can also be produced by using the method to serve as an organic anti-foam partition plate, and is particularly suitable for being used in various public places to block splattering of salivary foam, prevent virus propagation and effectively relieve various uncomfortable environments caused by long-time wearing of masks by people.

Description

technical field [0001] The invention belongs to the field of organic glass, in particular to a flame-retardant organic glass and a preparation method thereof. Background technique [0002] Plexiglass (PMMA) is a transparent material with high light transmittance, strong weather resistance, strong plasticity, strong impact resistance, strong corrosion resistance, and excellent insulation effect. It replaces ordinary glass or Tempered glass application. Some countries or regions also mandate the use of plexiglass in certain application fields. For example, the United States and Japan have made mandatory regulations in the law. The buildings of primary and secondary schools and kindergartens must use plexiglass. a development trend. However, the surface hardness, heat resistance, fire resistance, and wind pressure resistance of plexiglass still have a certain gap with ordinary glass, especially tempered glass, and cannot meet the performance requirements of the application fi...

Claims

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Application Information

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IPC IPC(8): C08L51/00C08L83/07C08K5/521C08L83/08C08K5/523C08L83/06C08J9/10C08F257/02C08F220/14
CPCC08L51/003C08J9/102C08J9/0061C08J9/0038C08F257/02C08L2201/02C08L2201/10C08L2201/08C08J2351/00C08J2483/08C08J2483/07C08L83/04C08K5/521C08L83/08C08K5/523C08L83/06C08F220/14
Inventor 李滨袁新强冯羽婷周汶燕冉金枝韩菁危若红王晨曦王丹梁文俊郝晓丽卫学玲刘杰
Owner SHAANXI SCI TECH UNIV
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