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Fluoro olefin copolymerization fluororesin with fluoric lateral group or fluoric branched chain

A technology of fluoroolefin-copolymerized fluororesin and olefin-copolymerized fluororesin, which is applied in the direction of coating, etc., and can solve the problems of poor solubility and processability of fluorocoating resin, uneven distribution of tetrafluoroethylene monomer segments, alcohol resistance and Reduced resistance to other solvents, etc., to achieve low crystallinity, excellent room temperature film formation and solubility, and improve solvent resistance

Inactive Publication Date: 2010-06-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The fluorine content of the fluorine coating resin synthesized with chlorotrifluoroethylene is low, and it is difficult to increase it. The fluorine resin with low fluorine content cannot take advantage of the high performance of the fluorine coating
Moreover, the resin pigment synthesized in the Japanese patent has poor dispersibility and low resistance to toluene solvent
Although the Chinese patent improves the wettability and dispersibility of fluororesin to paint pigments, the resistance to alcohol and other solvents is also reduced
However, tetrafluoroethylene is a "hard monomer". The more tetrafluoroethylene units in the molecular chain of a copolymer of tetrafluoroethylene and vinyl acetate and other monomers, the stronger the rigidity of the polymer chain, and the fluorine coating resin dissolves. The worse the property is, the fluorine coating will be easy to delaminate and the workability will be poor.
When the mole fraction of tetrafluoroethylene unit reaches 50%, the solubility and processability of fluorine coating resin are very poor
The existence of non-fluorine segment will inevitably affect the performance of fluorine coatings, and because the non-fluorine polymerization monomer used in the above method participates in polymerization, the distribution of tetrafluoroethylene monomer segment in the polymer will be uneven, which will also affect Resin properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0040] After the autoclave was evacuated and filled with nitrogen for 3 times, the solvent and 2.5g of azobisisobutyronitrile were added to the 2L autoclave with electromagnetic stirring. 73g, 28g of ethyl vinyl ether, 36g of hydroxybutyl vinyl ether, and 5g of undecylenic acid were respectively accurately measured by the metering tank and added to the reaction kettle. Finish. At this time, the pressure was about 1.2 MPa. Start to heat up and start stirring. When the temperature in the kettle reaches 70 °C, the reaction pressure is 1.95MPa to maintain the temperature. After 10 hours, the reaction pressure in the kettle is about 0.5MPa. The reaction is terminated, and the material is cooled and discharged to obtain colorless or yellowish transparent, Homogeneous viscous liquid without mechanical impurities. The concrete index of the product of the present invention is as shown in table 1:

[0041] Table 1

[0042] characteristic

example 2

[0044] Using the same method and equipment as in Example 1, but the reaction temperature was 80 °C, the reaction pressure was 2.8 MPa, and the reaction time was 7 hours, the fluororesin was synthesized according to the amount of monomers and the amount shown in Table 2. performance fluororesin.

example 3

[0046] Using the same method and equipment as in Example 1, but with the reaction temperature of 60 °C, the reaction pressure of 1.5 MPa, and the reaction time of 8 hours, the fluororesin was synthesized according to the amount of monomers and the amount shown in Table 2, and a fluororesin with excellent properties was obtained. performance fluororesin.

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PUM

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Abstract

The invention discloses a fluoro olefin copolymerization fluororesin with a fluoric lateral group or a fluoric branched chain, the resin is hexabasic copolymer which is formed by polymerizing fluoro olefin (trifluorochlor oethylene, tetrafluoroethylene), vinyl ether with a branched chain or a fluoric branched chain (lateral group) structure, alkyl vinyl ester, alkyl vinyl ether, hydroxyalkyl vinyl ether and olefine acid, the appearance of the fluoro olefin copolymerization fluororesin is colourless and faint yellow transparent liquid, the hydroxyl value (mgKOH / g) is 40-60, the acid value (mgKOH / g) is 6.5-13, dry resin fluorine content (%) is 35-45 percent, and the viscosity coefficient ((coating-4)25 DEG Cs) is 60-80. The fluoro olefin copolymerization fluororesin improves the solvent resistance of the fluorine coating, solves the technical problems of high-performance fluorine coating with good fluorine content and good dissolubility and constructability can not be synthesized originally and has the advantages of high fluorine content and low crystallinity.

Description

technical field [0001] The present invention relates to a kind of fluoroolefin copolymerized fluororesin, in particular to a kind of using ether type polymerized monomer with branched or fluorine-containing branched chain (side group) structure as main raw material and fluoroolefin and non-fluorinated polymerized monomer to carry out Fluoroolefin copolymerized fluororesin obtained by multi-component copolymerization. Background technique [0002] Fluorine coating (also known as fluorocarbon coating) is a new high-performance coating with a durability of more than 20 years and outstanding stain resistance. It is known as the "coating king" and is an ideal exterior wall coating product. . Its core substance is organic fluoropolymer resin, which requires that the resin should have sufficient fluorine content first to ensure that the coating has good weather resistance and chemical resistance; at the same time, the resin molecule has better flexibility and low crystallinity, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/26C08F214/18C08F216/14C08F218/08C08F218/04C08F216/18C08F220/04C09D127/18C09D127/12
Inventor 张书香耿兵张炉青张书升施强李辉
Owner UNIV OF JINAN
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