Method for manufacturing a matte coating film, method for manufacturing a decorative sheet, and active energy ray curable composition

Abstract

The present invention provides a method for manufacturing a matte coating film that can be applied to a variety of materials and can provide a uniform and excellent matte finish. [Solution] A method for producing a matte coating film is provided, comprising the steps of (I) forming a coating film of an active energy ray curable composition on a substrate, (II) irradiating the coating film with ultraviolet light, and (III) irradiating the coating film with ultraviolet light using a low-pressure mercury lamp, wherein the active energy ray curable composition comprises a compound having a (meth)acryloyl group, a photopolymerization initiator, and fine particles, wherein the photopolymerization initiator comprises a 2-hydroxy-2-methyl-1-phenylpropanone structure or a benzophenone structure and includes a photopolymerization initiator (A) having an absorption peak at a wavelength of 270 nm or less, and the particle size of the fine particles is 1 nm or more and less than 10 μm.

Claims

1. Step (I) of forming a coating film of an active energy ray curable composition on a substrate, The process involves irradiating the coating film with ultraviolet light (II), The process includes, in this order, a step (III) of irradiating the coating film with ultraviolet light using a low-pressure mercury lamp. The active energy ray curable composition comprises a compound having a (meth)acryloyl group, a photopolymerization initiator, and fine particles. The photopolymerization initiator comprises a 2-hydroxy-2-methyl-1-phenylpropanone structure or a benzophenone structure, Furthermore, it contains a photopolymerization initiator (A) having an absorption peak at a wavelength of 270 nm or less. The particle size of the aforementioned fine particles is 1 nm or more and less than 10 μm. A method for manufacturing a matte coating film.

2. Furthermore, the method for manufacturing a matte coating film according to claim 1, comprising the step (IV) of irradiating the coating film with ultraviolet light or an electron beam.

3. A method for manufacturing a decorative sheet, comprising the method for manufacturing a matte coating film as described in claim 1.

4. An active energy ray curable composition used in a method for producing a matte coating film according to claim 1 or 2, The compound contains a (meth)acryloyl group, a photopolymerization initiator, and fine particles. The photopolymerization initiator comprises a photopolymerization initiator (A) having a 2-hydroxy-2-methyl-1-phenylpropanone structure and an absorption peak at a wavelength of 270 nm or less. An active energy ray curable composition wherein the particle size of the fine particles is 1 nm or more and less than 10 μm.

5. The active energy ray curable composition according to claim 4, wherein the molecular weight of the photopolymerization initiator (A) is 200 or more.

6. Furthermore, the active energy ray curable composition according to claim 4 contains a photopolymerization initiator (B) having an absorption peak at a wavelength of 345 nm or higher.

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