Cross-linking type fluorine-containing acrylic resin

An acrylic resin, cross-linked technology, applied in the direction of coating, etc., can solve the problems of resin weather resistance, stain resistance can not be fully manifested, poor solubility, difficult polymer molecular chain segment shielding protection "effect, etc., Achieve the effect of maintaining cost-effective advantages, improving weather resistance, and excellent comprehensive performance

Active Publication Date: 2008-01-30
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional fluorocarbon resins (such as Teflon series fluorocarbon resins and polyvinylidene fluoride resins) have high crystallinity, poor solubility, and poor adhesion to the substrate. There are special requirements for the selection of raw materials such as pigments and fillers, which limits the use and promotion of fluorocarbon resins
The recently developed cross-linked fluorocarbon resins, such as copolymer resins of fluoroolefins and vinyl ethers or vinyl esters (referred to as FEVE resins), are formed by copolymerization of chlorotrifluoroethylene or tetrafluoroethylene with vinyl monomers. The main advantages It has excellent weather resistance and expands the application range of fluorocarbon resin coatings; the disadvantage is that the copolymerization reaction to form the resin requires high pressure, and at the same time, the choice of comonomer types is poor. The weather resistance of fluorocarbon resin coatings is equivalent to that of ordinary acrylic resin coatings, but its price is much more expensive than acrylic resin coatings. In addition, the selectivity of solvents in use is also limited
The Chinese patent application with the application number 200510021181.7 is a one-component thermoplastic fluorocarbon coating, in which the fluorine-containing acrylic resin is synthesized from a fluorine-containing trifluoroethyl methacrylate monomer with a mass percentage of less than 10%. Calculated from the molecular weight of trifluoroethyl methacrylate of 168, the content of fluorine atoms in the resin is about 3%. It is difficult for the coating prepared by it to substantially achieve the performance similar to that of fluorocarbon resin coatings. In addition, the thermoplastic fluorine The limitations of the inherent properties of ca

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the reaction equipment, 15 parts of xylene was added in advance, and the temperature was raised to 130°C. 7.5 parts of methyl methacrylate, 7.5 parts of butyl methacrylate, 5.5 parts of ethyl acrylate, 0.5 parts of methacrylic acid, Mix 6.5 parts, 22.5 parts of trifluoroethyl methacrylate, 0.6-1.2 parts of initiator benzoyl peroxide, and 20 parts of xylene, and add it dropwise for 5 hours at a constant speed. Add 10 parts of methyl ethyl ketone and 5 parts of cyclohexanone, stir evenly, and then filter and discharge to obtain a cross-linked fluorine-containing acrylic resin with a solid content of 50%.

Embodiment 2

[0020] In the reaction equipment, 15 parts of xylene was added in advance, and the temperature was raised to 130°C. 10 parts of methyl methacrylate, 7.5 parts of ethyl methacrylate, 6 parts of butyl acrylate, 3 parts of N-methylolacrylamide, Mix 6 parts of hydroxyethyl methacrylate, 12.5 parts of trifluoroethyl methacrylate, 0.6-1.4 parts of initiator benzoyl peroxide, and 20 parts of xylene, mix evenly, add dropwise for 5 hours at a constant speed, and heat up to 135 Keep warm at ℃ for 3 hours, cool down, add 10 parts of butyl acetate and 10 parts of cyclohexanone, stir evenly, and then filter and discharge to obtain a cross-linked fluorine-containing acrylic resin with a solid content of 45%.

Embodiment 3

[0022] In the reaction equipment, add 15 parts of toluene in advance, raise the temperature to 110°C, add 8.5 parts of methyl methacrylate, 8.5 parts of butyl methacrylate, 6.5 parts of butyl acrylate, 0.5 parts of acrylic acid, and 5.5 parts of hydroxypropyl methacrylate 10.5 parts of trifluoroethyl methacrylate, 10 parts of trifluoroethyl acrylate, 0.6-1.2 parts of initiator azobisisobutyronitrile, 20 parts of toluene, mix well, add dropwise at a constant speed for 5 hours, keep warm for 3 hours, cool down, and mix Add 10 parts of butyl acetate and 5 parts of propylene glycol methyl ether acetate, stir evenly, and then filter out the material to obtain a cross-linked fluorine-containing acrylic resin with a solid content of 50%.

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PUM

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Abstract

The invention relates to a crosslinking type fluorine-containing acrylic resin, which is obtained by the heating and polymerization of more than one acrylic acid type monomer under initiator. The invention is characterized in that: the amount of each monomer applied in polymerization reaction is according to weight portions: methyl methacrylate 5-10 portions, alkyl acrylate monomer 10-20 portions, functional acrylic acid monomer 5-10 portions, fluorine-containing acrylic monomer 10-25 portions, organic solvent 40-60 portions; the fluorine-containing acrylic monomer is either or both of trifluoroethyl methacrylate and trifluoroethyl acrylate; the content of the fluorine-containing acrylic monomer takes 20-50 percent of the total weight of all monomer applied in the polymerization reaction. The resin can be crossingly cured at normal temperature and low medium temperature and has the wide application. Coating produced with the resin, comprehensive performance of which is close to fluorocarbon coatings maintains performance price ratio advantage of the acrylic resin.

Description

technical field [0001] The invention relates to a cross-linked fluorine-containing acrylic resin. More specifically, the present invention relates to a cross-linked fluorine-containing acrylic resin that maintains the cost performance advantage of acrylic resin, is low in price, and has the same overall performance as fluorocarbon resin. Background technique [0002] The unique fluorine-carbon bond in the molecular structure of fluorocarbon resin endows the fluorocarbon resin coating with excellent properties such as ultra-long weather resistance, chemical corrosion resistance, stain resistance and self-cleaning property. However, traditional fluorocarbon resins (such as Teflon series fluorocarbon resins and polyvinylidene fluoride resins) have high crystallinity, poor solubility, and poor adhesion to the substrate. The selection of raw materials such as pigments and fillers has special requirements, which limits the use and promotion of fluorocarbon resins. The recently d...

Claims

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Application Information

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IPC IPC(8): C08F220/22C09D133/14
Inventor 朱东刘长亮曹亚成
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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