Highly-transparent flame-retardant modified organic glass and preparation method thereof

A plexiglass and transparent technology, applied in the field of flame retardant modified plexiglass and its preparation, can solve the problems of increasing the production cost of flame retardants, affecting the application of modified polymers, etc., achieving low production cost and being conducive to industrial application Promotion, good effect of flame retardant performance

Inactive Publication Date: 2016-02-10
黄国波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of the above-mentioned flame retardants consumes a large amount of organic solvents, and a product of a certain purity is obtained through cumbersome separation and purification methods, which undoubtedly increases the production cost of the flame retardants and affects their application in modified polymers.

Method used

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  • Highly-transparent flame-retardant modified organic glass and preparation method thereof
  • Highly-transparent flame-retardant modified organic glass and preparation method thereof
  • Highly-transparent flame-retardant modified organic glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Add 19.37g (0.097mol) 2-oxo-2-chloro-5,5-dimethyl-1,3,2-dioxaphosphorinane, 10.63g (0.105mol) ) N-methylolacrylamide, 100g methyl methacrylate and 0.15g hydroquinone, feed nitrogen, stir and slowly raise the temperature to 110°C, and react for 4 hours to obtain a reactive flame retardant containing phosphorus nitrogen system agent and methyl methacrylate mixture;

[0032] (2) Cool the mixed solution obtained in step (1) to 90° C., add 0.8 g of cumene hydroperoxide, and stir for 0.5 hours to complete the prepolymerization;

[0033] (3) Inject the prepolymer prepared in step (2) into a mold and exhaust it, polymerize at a low temperature of 40° C. for 24 hours, and obtain a flame-retardant modified organic glass after demolding. The limiting oxygen index (LOI) of the obtained flame-retardant modified organic glass is 30.7%, and the light transmittance is 89.1%.

Embodiment 2

[0035] The preparation operation method of flame-retardant modified plexiglass and the amount of methyl methacrylate are the same as in Example 1, except that:

[0036] In step (1), the molar ratio of 2-oxo-2-chloro-5,5-dimethyl-1,3,2-dioxaphosphorinane to N-methylolacrylamide is 1:1.1 , The total mass of 2-oxo-2-chloro-5,5-dimethyl-1,3,2-dioxaphosphorinane and N-methylolacrylamide is the mass of methyl methacrylate 15%, the polymerization inhibitor is methyl hydroquinone, the mass is 0.03% of methyl methacrylate, the reaction temperature is 50°C, and the reaction time is 8 hours;

[0037] In the step (2), the prepolymerization temperature is 70° C., the initiator is benzoyl peroxide, and the initiator quality is 1% of the quality of methyl methacrylate;

[0038]The low-temperature polymerization temperature in step (3) is 50° C., and the time is 18 hours. The LOI of the obtained flame-retardant modified organic glass was 25.1%, the light transmittance was 91.4%, and the pre...

Embodiment 3

[0040] The preparation operation method of flame-retardant modified plexiglass and the amount of methyl methacrylate are the same as in Example 1, except that:

[0041] In step (1), the molar ratio of 2-oxo-2-chloro-5,5-dimethyl-1,3,2-dioxaphosphorinane to N-methylolacrylamide is 1: 1.2 , The total mass of 2-oxo-2-chloro-5,5-dimethyl-1,3,2-dioxaphosphorinane and N-methylolacrylamide is the mass of methyl methacrylate 5%, the polymerization inhibitor is p-benzoquinone, the mass is 0.06% of the mass of methyl methacrylate, the reaction temperature is 60°C, and the reaction time is 7 hours;

[0042] In the step (2), the prepolymerization temperature is 80° C., the initiator is tert-butyl hydroperoxide, the quality is 0.5% of the quality of methyl methacrylate, and the prepolymerization time is 1 hour;

[0043] In step (3), the low-temperature polymerization temperature is 60° C., and the time is 18 hours. The LOI of the obtained flame-retardant modified organic glass is 22.4%, ...

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Abstract

The invention provides highly-transparent flame-retardant modified organic glass and a preparation method thereof. The highly-transparent flame-retardant modified organic glass comprises a polymer shown in a formula (I). According to the highly-transparent flame-retardant modified organic glass, a flame retardant is directly introduced into an organic glass molecular chain through a copolymerization reaction, the obtained flame-retardant organic glass has excellent flame resistance, transparency and colorability, and secondary pollution does not exist in the using process. The preparation method comprises the steps that methyl methacrylate is adopted as solvent; on the condition that a polymerization inhibitor exists, 2-oxo-2-chlorine-5,5-dimethyl-1,3,2-phospho heterocycle hexane and N-hydroxymethyl acrylamide are reacted to obtain mixed liquor of a phosphorus and nitrogen reaction type flame retardant shown in a formula (II) and vinyl acetate, under the action of an initiator, prepolymerization, low temperature polymerization in a mold and demoulding are conducted, and the highly-transparent flame-retardant modified organic glass is obtained. A methyl methacrylate monomer is adopted to serve as the solvent, solvent recovery does not exist in the preparation process, industrial three wastes are not produced, separation and purification are not needed for a product, operation is easy and convenient, and industrial production is easy.

Description

technical field [0001] The invention relates to a flame-retardant modified organic glass and a preparation method thereof, in particular to a highly transparent flame-retardant organic glass and a preparation method thereof. Background technique [0002] Polymethyl methacrylate (PMMA), commonly known as plexiglass, has excellent chemical stability, good electrical insulation, aging resistance, high transparency (93% light transmittance), etc., and is widely used in building materials, automobiles, etc. Accessories, electrical instruments, lamps and lighting, military equipment and other industries. However, the heat resistance of plexiglass is poor, the use temperature is low, and it is easy to burn, and a large amount of dense smoke and toxic gas are produced during the combustion process, which has caused serious harm to the environment. Because the fire directly or indirectly caused by its use poses a huge threat to the public safety of human society, improving the flame...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F230/02C08L33/12
Inventor 黄国波
Owner 黄国波
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