Method for applying ultraviolet curable coating material and method for producing ultraviolet cured film

Patent metadata

Field	Value
Publication number	US-11267017-B2
Application number	US-201615999737-A
Country	US
Kind code	B2
Filing date	Aug 23, 2016
Priority date	Feb 19, 2016
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A method for applying an ultraviolet curable coating material and a method for producing an ultraviolet cured film include the steps of: supplying an ultraviolet curable coating material containing an ultraviolet curable acrylic monomer into a mixer under a condition of greater than or equal to 8 MPa without diluting the ultraviolet curable coating material with an organic solvent; supplying carbon dioxide with a critical pressure or more into the mixer; mixing the ultraviolet curable coating material and the carbon dioxide supplied into the mixer to form a mixed fluid; spraying the mixed fluid under a condition of a critical pressure or more of the carbon dioxide to form a coating film; and irradiating the coating film with ultraviolet rays to form an ultraviolet cured film.

First claim

The invention claimed is:

1. A method for applying an ultraviolet curable coating material, the method comprising the steps of:
supplying an ultraviolet curable coating material containing an ultraviolet curable acrylic monomer into a mixer under a condition of greater than or equal to 8 MPa without diluting the ultraviolet curable coating material with an organic solvent;
supplying carbon dioxide with a critical pressure or more into the mixer;
mixing the ultraviolet curable coating material and the carbon dioxide supplied into the mixer to form a mixed fluid;
spraying the mixed fluid under a condition of a critical pressure or more of the carbon dioxide to form a coating film; and
irradiating the coating film with ultraviolet rays to form an ultraviolet cured film,
wherein the ultraviolet curable coating material does not contain an organic solvent.

2. The method for applying an ultraviolet curable coating material according to claim 1 , wherein in the mixed fluid, the carbon dioxide is mixed at an addition concentration greater than or equal to 1.0 time and less than or equal to 4.0 times of a saturation solubility in the ultraviolet curable coating material.

3. The method for applying an ultraviolet curable coating material according to claim 1 or 2 , wherein a temperature of the mixed fluid before the spraying is heated at greater than or equal to 30° C. and less than or equal to 80° C.

4. The method for applying an ultraviolet curable coating material according to claim 1 or 2 , wherein the mixer is a micro mixer having a micro flow path having a flow path diameter of less than or equal to 1 mm.

5. The method for applying an ultraviolet curable coating material according to claim 1 or 2 , wherein
the ultraviolet curable acrylic monomer comprises (i) a trifunctional or higher acrylic polyfunctional monomer, or (ii) a trifunctional or higher acrylic polyfunctional monomer and a bifunctional or lower acrylic non-polyfunctional monomer, and
the ultraviolet curable coating material further comprises a photopolymerization initiator.

6. A method for producing an ultraviolet cured film, the method comprising the steps of:
supplying an ultraviolet curable coating material containing an ultraviolet curable acrylic monomer into a mixer under a condition of greater than or equal to 8 MPa without diluting the ultraviolet curable coating material with an organic solvent;
supplying carbon dioxide with a critical pressure or more into the mixer;
mixing the ultraviolet curable coating material and the carbon dioxide supplied into the mixer to form a mixed fluid;
spraying the mixed fluid under a condition of a critical pressure or more of the carbon dioxide to form a coating film; and
irradiating the coating film with ultraviolet rays to form an ultraviolet cured film,
wherein the ultraviolet curable coating material does not contain an organic solvent.

7. A method for producing an ultraviolet cured film on a plastic film, the method comprising the steps of:
supplying an ultraviolet curable coating material containing an ultraviolet curable acrylic monomer into a mixer under a condition of greater than or equal to 8 MPa without diluting the ultraviolet curable coating material with an organic solvent;
supplying carbon dioxide with a critical pressure or more into the mixer;
mixing the ultraviolet curable coating material and the carbon dioxide supplied into the mixer to form a mixed fluid;
spraying the mixed fluid on a plastic film serving as a workpiece to be coated under a condition of a critical pressure or more of the carbon dioxide to form a coating film; and
irradiating the coating film with ultraviolet rays to form an ultraviolet cured film,
the ultraviolet curable coating material does not contain an organic solvent.

Assignees

• Toyo Boseki
• Aist

Inventors

• Takii Isao
• Shibata Yusuke
• Kawasaki Shin-Ichiro
• Fujii Tatsuya

Classifications

• C09D7/40

  Additives · CPC title

• B01F23/451

  by injecting one liquid into another · CPC title

• B05D7/04

  to surfaces of films or sheets (producing layered products by applying coatings of pasty or pulverulent plastics B29C41/00) · CPC title

• B05D2201/02

  Polymeric substrate · CPC title

• C08J2335/02

  Characterised by the use of homopolymers or copolymers of esters (C08J2335/06, C08J2335/08 take precedence) · CPC title