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Curable fluorine-containing coating composition

A technology of fluorine-containing coatings and compositions, applied in the direction of coating, etc., can solve problems such as insufficient curing

Active Publication Date: 2008-01-02
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although these fluorine-containing resins are soluble in common solvents, even in the Japanese Patent Publication No. 8-32847 where the fluorine-containing resin is a curable fluorine-containing copolymer, the total amount of the introduced hydroxyl value and acid value is not greater than 30 mg KOH / g, when it comes to the hydroxyl value and acid value, both are 5 mg KOH / g, and the curability is insufficient, so it is desired to improve properties such as solvent resistance, weather resistance, and durability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] The preparation of the curable fluorine-containing coating composition of the present invention can be carried out by a conventional method, and can obtain excellent coating properties on metals such as automobiles, airplanes, ships, trams, etc., plastics, concrete, etc. coating composition.

[0048] As the coating method, conventionally known methods can be used, for example, brushes, rollers, sprayers, airless sprayers, flow coaters, roll coaters, spin coaters, etc. can be used to coat various substrates. .

Embodiment

[0050] The present invention will be described more specifically with reference to examples below, but the present invention is not limited to these examples.

[0051] Measuring methods used in this specification other than those described above are as follows.

[0052] (NMR analysis)

[0053] NMR measurement device: manufactured by BRUKER

[0054] 1 H-NMR measurement conditions: 300MHz (tetramethylsilane = 0ppm)

[0055] 19 F-NMR measurement conditions: 282MHz (trichlorofluoromethane = 0ppm)

[0056] (Elemental analysis)

[0057] Measuring device: CHN CORDER produced by J-Science and Ionalyzer 901 produced by Orio Research

[0058] (hydroxyl value and acid value)

[0059] Calculations were performed based on compositions obtained by NMR and elemental analysis.

[0060] (number average molecular weight)

[0061] Measuring device: GPC (model HLC-8020) manufactured by Tosoh Co., Ltd.

[0062] Determination conditions: use 3 TSKgel: GMHXL, 1 G2500HXL, 1 GRCXL-L as chrom...

manufacture example 1

[0069] Production Example 1 (Production of Hydroxyl-Containing Fluorinated Copolymer)

[0070]Add 2500g butyl acetate, 554.5g Veova9 (hereinafter referred to as "VV9"), 69.1g vinyl benzoate (VBz), 83.5g 4-hydroxybutyl vinyl ether (HBVE) in a stainless steel autoclave with a volume of 6000ml, After cooling to 5° C., the operation of nitrogen substitution under reduced pressure was repeated three times. Finally, the pressure was reduced again and 280.0 g of tetrafluoroethylene (TFE) was added. Under stirring, the temperature was raised to 62.0° C., and 28.38 g of Perbucell PV (trade name, peroxide-based polymerization initiator produced by NOF Co., Ltd.) was added to initiate polymerization. When the internal pressure of the reactor decreased from 1.0 MpaG to 0.4 MpaG, the reaction was stopped. The polymerization yield was 98.0%. The resulting fluorine-containing copolymer was 19 F-NMR, 1 H-NMR and elemental analysis analysis prove that it is a fluorine-containing copolymer...

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PUM

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Abstract

Disclosed is a curable fluorine-containing coating composition composed of a category 3 organic solvent (A), a fluorine-containing copolymer (B) with a hydroxyl group which is soluble in the organic solvent (A) and has a hydroxyl number of more than 5 mgKOH / g and a total of hydroxyl number and acid number of more than 30 mgKOH / g, and if necessary an acrylic resin (C) and a curing agent (D). This fluorine-containing coating composition exhibits sufficient curability even at room temperature, and enables to form a coating film which is excellent in solvent resistance, water resistance, weather resistance, hardness, gloss and the like, while being environmental friendly.

Description

technical field [0001] The present invention relates to an environment-friendly curable fluorine-containing coating composition, which can provide a coating film excellent in solvent resistance, water resistance, weather resistance, coating film hardness, gloss and the like. Background technique [0002] Fluorine-containing resins have excellent weather resistance, chemical resistance, water and oil repellency, and stain resistance due to the high energy and low polarizability of the C-F bond in the molecule, and various applications have been developed. However, due to such characteristics of fluorine-containing resins, the solvents that can be used are limited. These organic solvents include organic solvents that may have adverse effects on the natural environment and / or working environment, so attempts have been made to expand the range of solvents, and research has been carried out on room temperature-curable fluorine-containing resins that are soluble in general-purpose...

Claims

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Application Information

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IPC IPC(8): C09D127/12C09D7/12C09D133/00
CPCC09D7/001C08K5/01C08L27/12C09D127/18C09D133/04C09D7/20C08L2666/04
Inventor 井本克彦千田彰
Owner DAIKIN IND LTD
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