Fluoroacrylate copolymer-containing coating material with high fluoride content and preparation method of coating material

Abstract

The invention discloses a fluoroacrylate copolymer-containing coating material with high fluoride content and a preparation method of the coating material, and belongs to the field of material preparation. The structural formula of the fluoroacrylate copolymer-containing coating material with high fluoride content is shown in the description, wherein m is equal to 2, 4 or 6; n is equal to 1 or 2;R is H or CH3. Gloss of a coating can be improved while weather fastness and corrosion resistance of the fluoride-containing coating are improved by regulating monomer components and proportion, and application range of the fluoride-containing coating is enlarged.

Description

technical field

[0001] The invention relates to the field of materials, in particular to a high-fluorine content fluorine-containing acrylate copolymer coating material and a preparation method thereof. Background technique

[0002] Now fluorine coatings, as the most weather-resistant and anti-corrosion high-performance coatings, have been successfully applied in major bridges, ships, large-scale construction projects, aerospace, electric wind blades and other places. Compared with acrylic series coatings, conventional fluorine coatings have superior weather resistance, UV resistance, corrosion resistance, heat resistance, etc., but due to molecular structure design and correlation problems of fluorine coating systems, the gloss of fluorine coatings is not as good as Acrylic paint series.

[0003] Patent CN106279500A discloses a solid acrylic resin with high-gloss, hydrophobic and anti-fouling functions, including the following raw materials in parts by weight: 8-20wt% fluo...

Examples

Embodiment 1

[0038] A method for preparing a high-fluorine content fluorine-containing acrylate copolymer coating material, comprising:

[0039] Step 1: Mix 75.6g of trifluoroethyl methacrylate (TFEMA), 32.9g of perfluorooctyl ethyl acrylate and 1.86g of hydroxyethyl acrylate, add to 235g of N,N-dimethylformamide, Stir well;

[0040] Step 2: Add 1.00 g of azobisisobutyronitrile (AIBN) to the solution in step 1 at a rate of 80 drops / min, heat up to 70° C. for polymerization, react for 12 hours, and cool down to stop the reaction;

[0041] Step 3: Completely dissolve the polymer obtained in Step 2 with N,N-dimethylformamide, add deionized water to the dissolved liquid for 3-5 precipitations, and dry in an oven at 100°C.

[0042] Gel Permeation Chromatography (GPC) is used to test the molecular weight of the fluoropolymer prepared in this embodiment. The test condition is that monodisperse polystyrene is used as molecular weight standard, tetrahydrofuran (THF) is used as mobile phase and sol...

Embodiment 2

[0047] A method for preparing a high-fluorine content fluorine-containing acrylate copolymer coating material, comprising:

[0048] Step 1: 75.6g of trifluoroethyl methacrylate (TFEMA), 267.6g of perfluorohexyl ethyl acrylate and 3.92g of hydroxyethyl acrylate (mixed, added to 235g of dichloromethane, stirred evenly;

[0049] Step 2: Add 1.50 g of azobisisobutyronitrile (AIBN) to the solution in step 1 at a rate of 100 drops / min, heat up to 70°C for polymerization, react for 12 hours, cool down to stop the reaction;

[0050] Step 3: Completely dissolve the polymer obtained in step 2 with dichloromethane, add deionized water to the dissolved liquid for 3-5 times to precipitate, and dry in an oven at 100°C.

[0051] The molecular weight of the fluoropolymer prepared in this example was determined to be 57826.

[0052] The resulting polymer had a fluorine content of 52.6%.

Embodiment 3

[0054] A method for preparing a high-fluorine content fluorine-containing acrylate copolymer coating material, comprising:

[0055] Step 1: Mix 75.6g of trifluoroethyl methacrylate (TFEMA), 551.2g of perfluorobutyl ethyl acrylate and 7.84g of hydroxyethyl acrylate, add TFEMA to the constant pressure low liquid funnel, and the perfluorobutyl Ethyl acrylate and hydroxyethyl acrylate were directly added to 235g of dimethyl sulfoxide, and 1.00g of tert-butyl peroxypivalate (TBPPI) was added to the solution, and stirred evenly;

[0056] Step 2: Gradually drop TFEMA into Step 1 at a rate of 80 drops / min, while raising the temperature to 70°C for polymerization;

[0057] Step 3: After all TFEMA is added dropwise, add 0.5g TBPPI again, react for 12 hours, cool down to stop the reaction;

[0058] Step 4: Completely dissolve the polymer obtained in Step 2 with dimethyl sulfoxide, add deionized water to the dissolved liquid for 3-5 precipitations, and dry in an oven at 100°C.

[0059] ...

technical field

[0001] The invention relates to the field of materials, in particular to a high-fluorine content fluorine-containing acrylate copolymer coating material and a preparation method thereof. Background technique

[0002] Now fluorine coatings, as the most weather-resistant and anti-corrosion high-performance coatings, have been successfully applied in major bridges, ships, large-scale construction projects, aerospace, electric wind blades and other places. Compared with acrylic series coatings, conventional fluorine coatings have superior weather resistance, UV resistance, corrosion resistance, heat resistance, etc., but due to molecular structure design and correlation problems of fluorine coating systems, the gloss of fluorine coatings is not as good as Acrylic paint series.

[0003] Patent CN106279500A discloses a solid acrylic resin with high-gloss, hydrophobic and anti-fouling functions, including the following raw materials in parts by weight: 8-20wt% fluo...

Examples

Embodiment 1

[0038] A method for preparing a high-fluorine content fluorine-containing acrylate copolymer coating material, comprising:

[0039] Step 1: Mix 75.6g of trifluoroethyl methacrylate (TFEMA), 32.9g of perfluorooctyl ethyl acrylate and 1.86g of hydroxyethyl acrylate, add to 235g of N,N-dimethylformamide, Stir well;

[0040] Step 2: Add 1.00 g of azobisisobutyronitrile (AIBN) to the solution in step 1 at a rate of 80 drops / min, heat up to 70° C. for polymerization, react for 12 hours, and cool down to stop the reaction;

[0041] Step 3: Completely dissolve the polymer obtained in Step 2 with N,N-dimethylformamide, add deionized water to the dissolved liquid for 3-5 precipitations, and dry in an oven at 100°C.

[0042] Gel Permeation Chromatography (GPC) is used to test the molecular weight of the fluoropolymer prepared in this embodiment. The test condition is that monodisperse polystyrene is used as molecular weight standard, tetrahydrofuran (THF) is used as mobile phase and sol...

Embodiment 2

[0047] A method for preparing a high-fluorine content fluorine-containing acrylate copolymer coating material, comprising:

[0048] Step 1: 75.6g of trifluoroethyl methacrylate (TFEMA), 267.6g of perfluorohexyl ethyl acrylate and 3.92g of hydroxyethyl acrylate (mixed, added to 235g of dichloromethane, stirred evenly;

[0049] Step 2: Add 1.50 g of azobisisobutyronitrile (AIBN) to the solution in step 1 at a rate of 100 drops / min, heat up to 70°C for polymerization, react for 12 hours, cool down to stop the reaction;

[0050] Step 3: Completely dissolve the polymer obtained in step 2 with dichloromethane, add deionized water to the dissolved liquid for 3-5 times to precipitate, and dry in an oven at 100°C.

[0051] The molecular weight of the fluoropolymer prepared in this example was determined to be 57826.

[0052] The resulting polymer had a fluorine content of 52.6%.

Embodiment 3

[0054] A method for preparing a high-fluorine content fluorine-containing acrylate copolymer coating material, comprising:

[0055] Step 1: Mix 75.6g of trifluoroethyl methacrylate (TFEMA), 551.2g of perfluorobutyl ethyl acrylate and 7.84g of hydroxyethyl acrylate, add TFEMA to the constant pressure low liquid funnel, and the perfluorobutyl Ethyl acrylate and hydroxyethyl acrylate were directly added to 235g of dimethyl sulfoxide, and 1.00g of tert-butyl peroxypivalate (TBPPI) was added to the solution, and stirred evenly;

[0056] Step 2: Gradually drop TFEMA into Step 1 at a rate of 80 drops / min, while raising the temperature to 70°C for polymerization;

[0057] Step 3: After all TFEMA is added dropwise, add 0.5g TBPPI again, react for 12 hours, cool down to stop the reaction;

[0058] Step 4: Completely dissolve the polymer obtained in Step 2 with dimethyl sulfoxide, add deionized water to the dissolved liquid for 3-5 precipitations, and dry in an oven at 100°C.

[0059] ...

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