Polymethyl methacrylate polymer and preparation method thereof

A technology of polymethyl methacrylate and methyl methacrylate is applied in the field of heat-resistant reinforced polymethyl methacrylate monomer and its preparation, and achieves environmental protection, low energy consumption, guaranteed product quality, and good light transmittance. Effect

Active Publication Date: 2022-05-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the problems existing in the existing polymethyl methacrylate monomer, the object of the present invention is to provide a heat-resistant enhanced polymethyl methacrylate macromolecular polymer and a preparation method thereof. Main monomer, the vinyl monomer shown in formula (I) is the second monomer, and the cross-linking agent shown in formula (II) carries out ternary copolymerization

Method used

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  • Polymethyl methacrylate polymer and preparation method thereof
  • Polymethyl methacrylate polymer and preparation method thereof
  • Polymethyl methacrylate polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Steps:

[0059] (1) Ingredients: take 80 parts of monomer I methyl methacrylate, 14 parts of monomer II vinyl monomer containing triphenyl structure, 6 parts of monomer III p-divinylbenzene, initiator diphenyl peroxide 0.18 part of formyl, 0.15 part of chain transfer agent tert-dodecyl mercaptan, fully stirred until they were mixed evenly, added to the reaction kettle, and passed nitrogen for 20 minutes to remove the oxygen dissolved in it;

[0060] (2) Step-by-step polymerization: control the reaction temperature to 90°C, react under stirring for 40min, move the polymer in the reactor into a low-temperature reaction vessel, control the reaction temperature to 50°C, and the reaction time to 32h, and further heat up to 90°C, 105°C, 120 ° C, each temperature was reacted for 2 hours, the polymerization conversion rate was improved, and the residual monomer was reduced.

Embodiment 2

[0062] Steps:

[0063] (1) batching: take 85 parts of monomer I methyl methacrylate, 9 parts of monomer II vinyl monomer containing triphenyl structure, 6 parts of monomer III p-divinylbenzene, initiator diphenyl peroxide 0.18 part of formyl, 0.15 part of chain transfer agent tert-dodecyl mercaptan, fully stirred until they were mixed evenly, added to the reaction kettle, and passed nitrogen for 20 minutes to remove the oxygen dissolved in it;

[0064] (2) Step-by-step polymerization: control the reaction temperature to 90°C, react under stirring for 40min, move the polymer in the reactor into a low-temperature reaction vessel, control the reaction temperature to 50°C, and the reaction time to 32h, and further heat up to 90°C, 105°C, 120°C, respectively, at each temperature for 2 hours to increase the polymerization conversion rate.

Embodiment 3

[0066] Steps:

[0067] (1) Ingredients: take 90 parts of monomer I methyl methacrylate, 6 parts of monomer II vinyl monomer containing triphenyl structure, 4 parts of monomer III p-divinylbenzene, initiator diphenyl peroxide 0.18 part of formyl, 0.15 part of chain transfer agent tert-dodecyl mercaptan, fully stirred until they were mixed evenly, added to the reaction kettle, and passed nitrogen for 20 minutes to remove the oxygen dissolved in it;

[0068] (2) Step-by-step polymerization: control the reaction temperature to 90°C, react under stirring for 40min, move the polymer in the reactor into a low-temperature reaction vessel, control the reaction temperature to 50°C, and the reaction time to 32h, and further heat up to 90°C, 105°C, 120 ° C, respectively, at each temperature for 2 hours to reduce residual monomers.

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Abstract

The invention provides a polymethyl methacrylate high molecular polymer, comprising the polymerization of a methyl methacrylate monomer, a vinyl monomer shown in formula (I) and a crosslinking agent shown in formula (II) reaction product. The polymethyl methacrylate macromolecular polymer of the invention can simultaneously improve the heat resistance and strength of the polymethyl methacrylate monomer resin, and the material has good comprehensive performance.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a heat-resistant reinforced polymethyl methacrylate monomer and a preparation method thereof. Background technique [0002] Polymethyl methacrylate (PMMA), commonly known as plexiglass, is a rigid, hard, colorless and transparent material with excellent optical properties; balanced physical and mechanical properties, light and tough, good weather resistance, arc resistance, electrical Insulation and processing properties; good chemical stability, widely used in aviation, automotive, optical instruments, electronics, communications, medicine and construction and other fields. [0003] PMMA is obtained by free radical polymerization of methyl methacrylate monomer. The molecular chain contains thermally unstable structures, which are easily thermally degraded. In addition, it is easy to be scratched and worn during use, resulting in a decrease in transparency, affecting the appeara...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F212/32C08F212/36C08F2/38C08F2/02
CPCC08F220/14C08F2/38C08F2/02C08F212/32C08F212/36
Inventor 张增丽张天宇许春梅赵方园侯丹丹徐伟杨捷
Owner CHINA PETROLEUM & CHEM CORP
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