Microemulsion of fluorin containing crylic acid of self-crosslink in normal temperature and its production method

A self-crosslinking and acrylic technology is applied in the field of room temperature self-crosslinking fluorine-containing acrylic acid microemulsion and its preparation, which can solve the problems of difficult control of the reaction process, weak adhesion, poor adhesion of the coating film, etc., and achieve polymerization stability. Excellent, easy to industrialize production, low coating film surface tension effect

Active Publication Date: 2006-02-08
广东鸿昌化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patents US3324069, US4383075, and US4557977 disclose a method of firstly liquefying ethylenic fluorine-containing monomers such as gaseous tetrafluoroethylene, chlorotrifluoroethylene, vinyl fluoride, and vinylidene fluoride under relatively high pressure, and then performing emulsion polymerization. method; however, first of all, these methods need to be polymerized under high pressure, and the reaction process is difficult to control; secondly, due to the presence of chlorine atoms in the polymer chain segment, the prepared fluorocarbon resin emulsion has poor performance in weather resistance, chemical resistance, etc. Again, because the C-F group is distributed on the polymer main chain, cause the production cost of this emulsion to be higher, take this emulsion as the coating film adhesion performance of paint base material
There is also a method to prepare fluorocarbon resin emulsion with fluoroalkyl ethyl ethers as raw materials. Since fluoroalkyl ethyl ethers are liquid at room temperature, the reaction is relatively simple and the process is easy to control; but also due to th...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] First, add 0.8g of dodecyl to a mixture consisting of 60g of methyl methacrylate, 32g of butyl methacrylate, 1g of hexafluorobutyl acrylate, 2g of methacrylic acid, 6g of styrene, and 2g of N-methylolacrylamide. Sodium sulfate, 2.0g octylphenol ethoxylate, 1.0gC 10 f 19 OC 6 h 4 CONHC 3 h 6 N + (CH 3 )I - In a mixed aqueous solution composed of a fluorine-containing emulsifier and 40 g of water, and then stirred on a JB90-D type powerful electric stirrer at a speed of 1000 rpm for 30 minutes, a mixed monomer pre-emulsion was obtained. Under the protection of nitrogen, with 0.2g sodium bicarbonate, 0.3g sodium lauryl sulfate, 0.9g octylphenol polyoxyethylene ether, 0.3gC 10 f 19 OC 6 h 4 CONHC 3 h 6 N + (CH 3 )I - Add 15g of the above-mentioned pre-emulsion to a four-necked bottle containing fluorine-containing emulsifier and 70g of water, raise the temperature to 80°C, add 0.1g of potassium persulfate, and react until the emulsion turns blue, then add th...

Embodiment 2

[0043] Add 0.5g sodium lauryl sulfate to a mixture of 60g methyl methacrylate, 32g butyl methacrylate, 5g hexafluorobutyl methacrylate, 2g methacrylic acid, and 2g N-methylolacrylamide. 1.5g octylphenol ethoxylate, 0.8gC 10 f 19 OC 6 h 4 CONHC 3 h 6 N + (CH 3 )I - In the mixed aqueous solution composed of fluorine-containing emulsifier and 40g water, then on the JB90-D type powerful electric stirrer, stir at the speed of 1000rpm for 10min, and then put it into the KQ3200DE numerical control ultrasonic varnisher for emulsification for 20min (wherein the ultrasonic power is 120kw, the operation The temperature is controlled at 25±2° C.) to obtain a mixed monomer pre-emulsion. Under the protection of nitrogen, with 0.2g sodium bicarbonate, 0.3g sodium lauryl sulfate, 0.9g octylphenol polyoxyethylene ether, 0.3gC 10 f 19 OC 6 h 4 CONHC 3 h 6 N + (CH 3 )I - Add 15g of the above pre-emulsion to a four-necked bottle of fluorine-containing emulsifier 50g of water, rai...

Embodiment 3

[0045] Add 0.5g sodium lauryl sulfate to a mixture of 60g methyl methacrylate, 32g butyl methacrylate, 5g hexafluorobutyl methacrylate, 2g methacrylic acid, and 2g N-methylolacrylamide. 1.5g octylphenol ethoxylate, 0.3C 10 f 19 OC 6 h 4 SO 3 Na fluorine-containing emulsifier and 40g water mixed aqueous solution, then on JB90-D type powerful electric stirrer, with 1000rpm speed of stirring for 10min, then put into KQ3200DE type numerical control ultrasonic varnish device for emulsification for 20min (wherein the ultrasonic power is 120kw , and the operating temperature is controlled at 25±2° C.) to obtain a mixed monomer pre-emulsion. Under nitrogen protection, add 0.2g sodium bicarbonate, 0.3g sodium dodecyl sulfate, 0.9g octylphenol polyoxyethylene ether, 0.1g C 10 f 19 OC 6 h 4 SO 3 Na fluorine-containing emulsifier and 50g water, stir and heat up to 80°C, at the same time add dropwise the mixed monomer pre-emulsion and 45g potassium persulfate aqueous solution (0.3...

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PUM

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Abstract

The invention discloses a normal temperature self-crosslinked fluoro-containing polyacrylic acid microemulsion and its preparing process, wherein the microemulsion comprises the constituents of (methyl) acrylic ester, alkenyl carboxylic acid, alkenyl linking agent, ethenyl aromatic compound, alkenyl fluoro-containing alkyl ester, other olefins unsaturated monomer, initiating agent, buffering agent, emulsifying agent, neutralization agent and water. The preparation process comprises making seed emulsion under oxidation and reduction initiation system, then employing semi-continuous polymerization process to prepare the fluoro-containing polyacrylic acid microemulsion with good polymerization stability, small particle size, low film coating surface tension, and strong adhesion.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a normal-temperature self-crosslinking fluorine-containing acrylic microemulsion and a preparation method thereof. Background technique [0002] Solvent-based fluororesins can cause environmental pollution and endanger human health. With the enhancement of people's awareness of environmental protection and the promulgation of relevant laws and regulations, the application and development of solvent-based fluororesins have been limited to a certain extent. In recent years, the research on waterborne fluororesin has attracted much attention. Fluorocarbon resin emulsion is a new type of water-based fluororesin. Due to the introduction of carbon-fluorine bonds with large bond energy in the emulsion polymer chain segment, the durability, stain resistance, and chemical resistance of the emulsion are greatly improved. , has the characteristics of high performan...

Claims

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Application Information

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IPC IPC(8): C08F220/10C08F2/24
Inventor 涂伟萍周新华胡剑青
Owner 广东鸿昌化工有限公司
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