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Methyl methacrylate-styrene copolymer containing fluoro-acrylate and preparation method thereof

A technology of methyl methacrylate and styrene copolymer, which is applied in the field of synthesis of fluorine-containing acrylate copolymers, can solve the problems of low conversion rate of fluorine-containing monomers and unstable emulsion, etc., and achieves low cost and simple method Effect

Inactive Publication Date: 2009-10-21
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the fluoropolymer is prepared by the classic emulsion polymerization method, the emulsion is unstable, and stratification will occur during the polymerization and storage, resulting in a decrease in the conversion rate of the fluoromonomer

Method used

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  • Methyl methacrylate-styrene copolymer containing fluoro-acrylate and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Add 0.25 grams of sodium dodecyl sulfate (SDS), 0.25 grams of nonylphenol polyoxyethylene ether (OP-10), 0.8 grams of tetrafluoropropanol, 0.4 grams of n-butanol, 1.0 gram of perfluoroalkyl ethyl acrylate (FA), 2.4 grams of methyl methacrylate (MMA), 2.4 grams of styrene (St), 43 grams of distilled water, pre-emulsified at 40°C at a stirring speed of 2500 rpm After 30 minutes, the pre-emulsion was obtained, and then 2 / 3 of the pre-emulsion was poured into the constant pressure dropping funnel, and after the four-necked bottle was filled with nitrogen and deoxygenated for 30 minutes (the following reaction process was kept under a nitrogen atmosphere), the temperature was raised to 80 ℃, add 0.06 gram of potassium persulfate (KPS), 0.03 gram of sodium bisulfite (NaHSO 3 ), reacted for 1.5 hours, and then used 2 hours to drop all the pre-emulsion liquid previously removed from the constant pressure dropping funnel into the four-necked flask. After the dropwise addition, t...

Embodiment 2

[0042] Add 0.25 g of SDS, 0.5 g of OP-10, 0.9 g of tetrafluoropropanol, 0.3 g of n-butanol, 1.5 g of perfluoroalkyl ethyl acrylate (FA), 2.4 g of methyl Methyl acrylate (MMA), 2.4 grams of styrene (St), 43 grams of distilled water, pre-emulsified for 30 minutes at 35 ° C, 3000 rpm stirring speed, and then pour 2 / 3 of the pre-emulsion into the constant pressure drop in the funnel. Fill the system with nitrogen and oxygen for 30 minutes (the following reaction process is kept under nitrogen atmosphere), the system is heated to 78°C, and 0.05 grams of KPS and 0.025 grams of NaHSO are added to the remaining pre-emulsion in the four-necked bottle 3 , reacted for 1.5 hours, then added dropwise the mixed solution in the constant pressure dropping funnel to the four-neck flask for 3 hours, and reacted for 4 hours after the addition was completed, and kept at 78°C for the reaction. After the reaction, use ethanol or saline to break the emulsification. Suction filtration, washing with...

Embodiment 3

[0047] Add 0.3 g of SDS, 0.45 g of OP-10, 0.8 g of tetrafluoropropanol, 0.4 g of n-butanol, 2.0 g of perfluoroalkyl ethyl acrylate (FA), 2.4 g of methyl Methyl acrylate (MMA), 2.4 grams of styrene (St), 43 grams of distilled water, pre-emulsified at 45 ° C for 30 minutes at a stirring speed of 2500 rpm, and then poured 2 / 3 of the pre-emulsion into the constant pressure drop in the funnel. Fill the system with nitrogen and oxygen for 30 minutes (the following reaction process is kept under nitrogen atmosphere), the system is heated up to 70 ° C, and 0.1 g of AIBN is added to the remaining pre-emulsion in the four-necked bottle, reacted for 1.5 hours, and then added dropwise with constant pressure drops The mixed solution in the funnel was kept at 70° C. for 5 hours to react. After the reaction, use ethanol or saline to break the emulsification. Suction filtration, washing with water, and drying to obtain the final product;

[0048] A component: take by weighing 0.05 gram of ...

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Abstract

The invention relates to a methyl methacrylate-styrene copolymer containing fluoro-acrylate and a preparation method thereof. The copolymer is prepared from the following compositions in percentage by mass: 1 percent of monomers, 0.025 to 0.09 percent of sodium dodecylsulfate, 0.025 to 0.09 percent of polyoxyethylene nonyl phenyl ether, 0.09 to 0.15 percent of tetrafluoropropanol, 0.045 to 0.075 percent of normal butanol, 4.0 to 7.5 percent of water and 0.005 to 0.02 percent of initiator. The copolymer solves the problems of expensive fluorine materials and poor compatibility when fluorine-containing materials are used for improving the hydrophobicity of epoxy resin, and provides the method for synthesizing the copolymer containing the fluoro-acrylate. The method is simple and pollution-free, has low cost, and is a good method for preparing the copolymer containing the fluoro-acrylate.

Description

technical field [0001] The invention belongs to the synthesis of fluorine-containing acrylate copolymer, in particular to a fluorine-containing acrylate-methyl methacrylate-styrene copolymer and a preparation method thereof. technical background [0002] Epoxy resin has many excellent properties. It is widely used as the base material of coating in the field of anti-corrosion. However, the surface energy of the coating formed by epoxy resin is high after curing and because there are a large number of hydrophilic groups after curing of epoxy resin. , resulting in too high water absorption of the coating, which can easily reduce the protective performance of the metal substrate. Therefore, it is very important to improve the hydrophobicity of the epoxy resin. Aiming at the defect of poor hydrophobicity of epoxy resin, researches have chosen low surface energy materials to modify epoxy resin. Typical low surface energy species are silicon and fluorine. Fluorine materials are ...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F212/08C08F220/22
Inventor 王月欣张广林李景红张倩郝文珺
Owner HEBEI UNIV OF TECH
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