Active energy ray-curable coating composition, method for formation of coating film, and coated article

An active energy ray, curing coating technology, applied in the device, coating, surface pretreatment of surface coating liquid, etc., can solve the problems of increased solvent usage, low degree of freedom, insufficient photocurability, etc. Low emissions, reduced usage, and excellent alkali resistance

Inactive Publication Date: 2011-01-12
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, with regard to these starch-based paints, there is no coating film forming method capable of forming a coating film excellent in finish, pencil hardness, scratch resistance, adhesion, weather resistance, alkali resistance, and solvent resistance on the object to be coated.
In addition, there is a problem that since organic solvent-based paints are used in all paints used, the amount of solvent used increases
[0011] In addition, in Japanese Patent Laid-Open No. 10-258202, cyclodextrin (meth)acrylate and an active energy ray-curable resin composition containing the same are disclosed. However, in the above-mentioned active energy ray-curable resin composition, glucose Forms a cyclic bonded structure through a glycosidic bond, and has a low degree of freedom in three-dimensionality, so photocurability is insufficient

Method used

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  • Active energy ray-curable coating composition, method for formation of coating film, and coated article
  • Active energy ray-curable coating composition, method for formation of coating film, and coated article
  • Active energy ray-curable coating composition, method for formation of coating film, and coated article

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Embodiment

[0226] Hereinafter, the present invention will be described more concretely by way of examples, but the present invention is not limited thereto. In addition, "part" and "%" mean "parts by mass" and "% by mass" unless otherwise indicated.

[0227] "A. Examples related to active energy ray-curable coating compositions"

manufacture example A-1

[0229] Production example of acrylate No.A-1 solution (for example)

[0230] Add 80 parts of dextrin (I) (glucose polymer with an average polymerization number of 4, with an average of 14 hydroxyl groups per molecule), 100 parts of methyl isobutyl ketone, methyl 0.16 parts of hydroquinone, 5.9 parts of lithium hydroxide monohydrate and 506.2 parts of methyl acrylate.

[0231] Next, nitrogen gas was blown into this solution, and it heated to 90 degreeC, stirring, and methyl acrylate, methanol, and methyl isobutyl ketone were distilled off to the outside of the system little by little. With respect to the methyl acrylate and methyl isobutyl ketone which decreased by distillative removal, the decreased amount was added to the reaction container.

[0232] Next, the methanol in the reaction container and the methanol distilled off were quantitatively followed by the measurement of gas chromatography, and the reaction was followed, and the dextrin (I) was cooled when an average of...

manufacture example A-2

[0234] Production example of acrylate No.A-2 solution (for example)

[0235] In Production Example A-1, the methanol in the reaction container and the methanol distilled off were quantitatively measured by gas chromatography to follow the reaction and prolong the reaction time until the dextrin (I) had an average of 14 hydroxyl groups per molecule. Except for the fact that 10.0 hydroxyl groups on average were acrylated, in the same manner as Production Example A-1, Acrylate No. A-2 of the present invention having a weight average molecular weight of 1,400 and an average of 10.0 acryloyl groups per molecule was obtained. solution.

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Abstract

Disclosed is an active energy ray-curable coating composition which is characterized by comprising: (a1) an acrylic acid ester of a non-cyclic oligosaccharide or a derivative thereof, which has an weight average molecular weight of 400 to 2,000 and contains 3.0 to 12.0 acryloyl groups on average per molecule; and (a2) a photopolymerization initiator. The active energy ray-curable coating composition is a bio-derived active energy ray-curable coating composition, and can form a coating film having excellent finished appearance, pencil hardness, scratch resistance, weather resistance and solvent resistance.

Description

technical field [0001] The present invention relates to an active energy ray-curable coating composition containing an acrylate of a specific acyclic oligosaccharide having an acryloyl group or a derivative thereof. Furthermore, the present invention relates to a primer film produced from a starch-based primer composition using starch, and a coating film produced from an active energy ray-curable water-based paint composition using sugars on the primer film. A method for forming a coating film, and a coated article obtained by using the method for forming a coating film. Background technique [0002] In recent years, from the viewpoint of reducing the impact on global warming, CO 2 The reduction of emissions is actively using renewable resources as an alternative to petroleum, and the carbon dioxide gas cycle on the earth does not use CO 2 Increased emissions from bio-components. [0003] As a representative material of such renewable resources, there are polysaccharide s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02B05D3/06B05D7/24C09D5/00C09D5/02C09D7/12C09D103/00C09D133/08
CPCB05D3/067C09D4/00C09D103/00
Inventor 稻田祐一增田秀树
Owner KANSAI PAINT CO LTD
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