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Flame-retardant methyl methacrylate-styrene copolymer and preparation method thereof

A technology of methyl methacrylate and styrene copolymer, which is applied in the direction of fire-resistant coatings, etc., can solve the problem of polymers not having flame-retardant properties, and achieve the effects of non-flame-retardant, high purity, and high light transmittance

Active Publication Date: 2020-12-25
SUZHOU DOUBLE ELEPHANT OPTICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymers obtained by the existing preparation methods do not have flame retardant properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of flame-retardant methyl methacrylate-styrene copolymer comprises the steps:

[0026] (1) Mix 30mL methyl methacrylate and 10mL styrene, and stir for 20 minutes to obtain a monomer mixture;

[0027] (2) Mix 1.8 mg of azobisisobutyronitrile ether solution (10 wt %) with 16.3 mg of triisopropylsilanethiol, stir for 20 minutes and remove the ether by volatilization to obtain an initiating system;

[0028] (3) At room temperature, add the initiator system to the monomer mixture, then stir at 60°C for 20 minutes, then stir at 90°C for 150 minutes, and finally stir at 110°C for 35 minutes; then stop heating and add an appropriate amount of acetone to obtain a polymer solution;

[0029] (4) Conventionally filter the polymer solution to obtain the filtrate; then add methanol to the filtrate, settle and filter to obtain the precipitate;

[0030] (5) The precipitate was vacuum-dried to obtain a flame-retardant methyl methacrylate-styrene copolymer.

Embodiment 2

[0032] The preparation method of flame-retardant methyl methacrylate-styrene copolymer comprises the steps:

[0033] (1) Mix 30mL methyl methacrylate and 10mL styrene, and stir for 30 minutes to obtain a monomer mixture;

[0034] (2) Mix 1.8 mg of azobisisobutyronitrile in diethyl ether (10 wt%) with 16.3 mg of triisopropylsilanethiol, stir for 30 minutes and then remove the diethyl ether to obtain an initiating system;

[0035] (3) At room temperature, add the initiator system to the monomer mixture, then stir at 60°C for 30 minutes, then stir at 90°C for 160 minutes, and finally stir at 110°C for 45 minutes; then stop heating and add an appropriate amount of acetone to obtain a polymer solution;

[0036] (4) Conventionally filter the polymer solution to obtain the filtrate; then add methanol to the filtrate, settle and filter to obtain the precipitate;

[0037] (5) The precipitate was vacuum-dried to obtain a flame-retardant methyl methacrylate-styrene copolymer.

Embodiment 3

[0039] The preparation method of flame-retardant methyl methacrylate-styrene copolymer comprises the steps:

[0040] (1) Mix 30mL methyl methacrylate and 10mL styrene, and stir for 20 minutes to obtain a monomer mixture;

[0041] (2) Mix 1.8 mg of azobisisobutyronitrile in diethyl ether (10 wt%) with 16.3 mg of triisopropylsilanethiol, stir for 30 minutes and then remove the diethyl ether to obtain an initiating system;

[0042] (3) At room temperature, add the initiator system to the monomer mixture, then stir at 60°C for 30 minutes, then stir at 70°C for 160 minutes, and finally stir at 110°C for 40 minutes; then stop heating and add an appropriate amount of acetone to obtain a polymer solution;

[0043] (4) Conventionally filter the polymer solution to obtain the filtrate; then add methanol to the filtrate, settle and filter to obtain the precipitate;

[0044] (5) The precipitate was vacuum-dried to obtain a flame-retardant methyl methacrylate-styrene copolymer.

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PUM

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Abstract

The invention relates to a flame-retardant methyl methacrylate-styrene copolymer and a preparation method thereof. The preparation method comprises the following steps: stirring methyl methacrylate and styrene to obtain a monomer mixture; mixing an ethyl ether solution of azodiisobutyronitrile with triisopropylsilanethiol, stirring the components, and then removing ethyl ether to obtain an initiation system; adding the initiation system into the monomer mixture, stirring at 60 DEG C, then stirring at 90 DEG C, and finally stirring at 110 DEG C; stopping heating, and adding acetone to obtain apolymer solution; filtering the polymer solution to obtain filtrate; then adding methanol into the filtrate to obtain precipitates; and drying the precipitates to obtain the flame-retardant methyl methacrylate-styrene copolymer. The obtained polymer is high in purity and high in light transmittance and solves the problem of low flame retardancy of an existing polymer.

Description

technical field [0001] The invention belongs to polymer preparation technology, and in particular relates to a flame-retardant methyl methacrylate-styrene copolymer and a preparation method thereof. Background technique [0002] As a general-purpose resin, methyl methacrylate-styrene copolymer combines the advantages of two monomer homopolymer resins and makes up for the shortcomings. It not only has good transparency, gloss and high impact resistance Strength, and when processing and molding, the melt viscosity is not high, and the fluidity is good. Its preparation methods mainly include bulk polymerization, emulsion polymerization and suspension polymerization. Among them, no solvent and water are used in the bulk polymerization process. Compared with other polymerization methods, the purification process is reduced, which can effectively improve the purity and light transmittance of the product; at the same time, waste water, waste liquid treatment, discharge and other l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F212/08C08F4/04C08F2/38C09K21/14
CPCC08F2/38C08F4/04C08F220/14C09K21/14C08F212/08
Inventor 朱志文杨得权李松亭
Owner SUZHOU DOUBLE ELEPHANT OPTICAL MATERIALS CO LTD
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