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Aqueous fluoric resin and its prepn and application

A water-based fluorine and resin technology, applied in the direction of coating, etc., can solve the problems of poor performance, expensive ether monomers, high cost, etc., and achieve good surface properties and weather resistance, good mechanical stability, and good chemical stability Effect

Inactive Publication Date: 2002-08-07
大连振邦氟涂料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In terms of water-based fluororesins at home and abroad, a variety of vinyl-containing ether monomers and fluoroolefins are generally used as comonomers. They are first made into macromolecules and then emulsion polymerized to prepare fluorine-containing emulsions. The price of ether monomers Expensive, high cost, and more complicated preparation process
Domestic fluororesins and their coatings are mostly oily. Our company's patent CN1322775A discloses a water-based fluororesin, which is obtained by emulsifying the existing fluororesin after evaporating the solvent, but the process is complicated and the industrialization investment is large.
At present, the performance of water-based fluororesin at home and abroad is still not good enough, and the requirements for environmental protection are relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 57.0g deionized water and 0.5g sodium lauryl sulfate, 2.5g nonylphenol polyoxyethylene ether and 2.3g styrylphenol polyoxyethylene ether in the mixing tank, mix and stir to obtain emulsifier aqueous solution, Stand-by; dissolve 0.5g of potassium persulfate in 40g of water, then divide into three equal parts, and stand-by; dissolve 0.4g of sodium bicarbonate in 10g of water, and stand-by; add 30g of chlorotrifluoroethylene, 70g of Vinyl acetate and 2 / 3 emulsifier aqueous solution are mixed and stirred for pre-emulsification to obtain emulsified monomers for use;

[0027] Add the remaining emulsifier aqueous solution and sodium bicarbonate aqueous solution into a 1L high-pressure reaction kettle with a stirring and heating device, degas and fill with N 2After repeating gas and degassing for three times, take 1 / 3 of the emulsified monomer and add it to the reaction kettle, and start stirring to raise the temperature; when the temperature reaches 60°C, add a part of ini...

Embodiment 2

[0029] Add 64.0g water and 0.6g sodium lauryl sulfate, 2.7g nonylphenol polyoxyethylene ether and 2.5g styrylphenol polyoxyethylene ether into the mixing tank, mix and stir to obtain emulsifier aqueous solution, stand-by 0.6g potassium persulfate is dissolved in 30g water, is divided into three parts (I) 5.8g, (II) 19.0g, (III) 5.6g again, stand-by; 0.3g sodium bicarbonate is dissolved in 50.0g water, obtains Sodium bicarbonate aqueous solution, ready for use; 25.0g chlorotrifluoroethylene, 57.0g vinyl acetate, 18.0g butyl acrylate and 9 / 10 emulsifier aqueous solution were mixed and stirred in a pre-emulsification kettle for 30 minutes, and pre-emulsified to obtain emulsified Monomer, ready to use.

[0030] Add the remaining emulsifier aqueous solution and sodium bicarbonate aqueous solution into a 1L pressure-resistant reactor, degas and fill with N 2 After gas and degassing were repeated three times, get 7% emulsified monomer and add in the reaction kettle, stir and heat up...

Embodiment 3

[0032] In the mixing tank, 56g of water, 0.6g of sodium lauryl sulfate, 2.6g of nonylphenol polyoxyethylene ether and 2.4g of styrylphenol polyoxyethylene ether are mixed, stirred evenly to obtain an aqueous emulsifier solution, and set aside; Dissolve 0.6g of potassium persulfate in 30g of water, then divide into three parts, (I) 1 / 5 part, (II) 3 / 5 part, (III) 1 / 5 part, set aside; dissolve 0.3g sodium bicarbonate in 56g In water, set aside; 25.0g chlorotrifluoroethylene, 56.0g vinyl acetate, 15.0g butyl acrylate, 4.0g acrylic acid and 5 / 6 emulsifier aqueous solution were mixed and stirred for pre-emulsification for 30 minutes to obtain emulsified monomer, set aside .

[0033] Add the remaining emulsifier aqueous solution and sodium bicarbonate aqueous solution into a 1L pressure-resistant reactor, degas and fill with N 2 After the gas and degassing have been repeated three times, take 1 / 10~1 / 20 of the emulsified monomer and add it to the reactor, and stir to raise the temper...

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PUM

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Abstract

The present invention relates to a water fluororesin, its preparation and applicaltion. It is a multicomponent copolymer containing trifluorochloroethylene (A) and aliphatic carboxylic vinyl ester (B), and its composition contans (by weight portion ratio) A:B: water: emulsifying agent: initiator=15-40:10-70:90-160:0.5-8.0:0.1-1.0. Said invented product possesses good chemical stability and mechanical stability, and can be extensively used in the fields of building industry, wooden ware and paper-making industry, etc.

Description

(1) Technical field: [0001] The invention relates to a fluorine-containing copolymer, especially a water-based fluororesin, a preparation method and an application thereof. (two) background technology: [0002] In terms of water-based fluororesins at home and abroad, a variety of vinyl-containing ether monomers and fluoroolefins are generally used as comonomers. They are first made into macromolecules and then emulsion polymerized to prepare fluorine-containing emulsions. The price of ether monomers Expensive, the cost is higher, and the preparation process is more complicated. Domestic fluororesins and their coatings are mostly oily. Our company's patent CN1322775A discloses a water-based fluororesin, which is obtained by emulsifying existing fluororesins after evaporating the solvent, but the process is complicated and the industrialization investment is large. At present, the performance of water-based fluororesin at home and abroad is still not good, and the requirement...

Claims

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Application Information

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IPC IPC(8): C08F2/22C08F14/18C08F214/24C09D127/12
Inventor 高达刘洪珠
Owner 大连振邦氟涂料股份有限公司
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