Coated film

Patent metadata

Field	Value
Publication number	US-10011734-B2
Application number	US-201314378739-A
Country	US
Kind code	B2
Filing date	Jan 24, 2013
Priority date	Feb 25, 2012
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

According to the present invention, there is provide a coated film capable of exhibiting an excellent adhesion property to a prism resin used in optical applications such as a backlight unit for liquid crystal displays, etc., in particular, a prism resin adaptable for high-brightness prisms, i.e., a high-refractive index prism resin. The coating film of the present invention comprises a polyester film and a coating layer formed on at least one surface of the polyester film which is prepared from a coating solution comprising a (meth)acrylate (A) and at least one crosslinking agent (B) selected from the group consisting of an oxazoline compound, an isocyanate-based compound and a melamine compound.

First claim

The invention claimed is:

1. A coated film comprising:
a polyester film;
a coating layer having a thickness of 0.002 to 0.2 μm and formed on at least one surface of the polyester film which is prepared from a coating solution comprising a (meth)acrylate (A) and at least one crosslinking agent (B) selected from the group consisting of an oxazoline compound, an isocyanate-based compound and a melamine compound; and
a surface functional layer which is formed from a solvent-free active energy ray-curable resin on a surface of the coating layer and has a refractive index of 1.56 to 1.65.

2. The coated film according to claim 1 , wherein a content of a carbon-carbon double bond in the (meth)acrylate (A) is not less than 3% by weight.

3. The coated film according to claim 1 , wherein the (meth)acrylate (A) is a polyfunctional (meth)acrylate.

4. The coated film according to claim 1 , wherein a content of the (meth)acrylate (A) in the coating solution is 5 to 95% by weight, and a content of the crosslinking agent (B) in the coating solution is 5 to 95% by weight, both based on a total amount of whole non-volatile components in the coating solution.

5. The coated film according to claim 1 , wherein the coating solution further comprises particles having an average particle diameter of not more than 1.0 μm, and a content of the particles in the coating solution is not more than 25% by weight based on a total amount of whole non-volatile components in the coating solution.

6. The coated film according to claim 1 , wherein the isocyanate-based compound is selected from the group consisting only of tolylene diisocyanate, xylylene diisocyanate, methylene diphenyl diisocyanate, phenylene diisocyanate, naphthalene diisocyanate, α,α,α′,α′-tetramethyl xylylene diisocyanate, methylene diisocyanate, propylene diisocyanate, lysine diisocyanate, trimethyl hexamethylene diisocyanate, hexamethylene diisocyanate, cyclohexane diisocyanate, methyl cyclohexane diisocyanate, isophorone diisocyanate, methylene-bis(4-cyclohexyl isocyanate), isopropylidene dicyclohexyl diisocyanate, biuret compounds, isocyanurate compounds, uretdione compounds, carbodiimide-modified compounds of isocyanates, blocked isocyanates, and combinations thereof.

7. The coated film according to claim 6 , wherein blocking agents used in the production of the blocked isocyanates are selected from the group consisting only of bisulfites; phenol, cresol, ethyl phenol, propylene glycol monomethyl ether, ethylene glycol, benzyl alcohol, methanol, ethanol, dimethyl malonate, diethyl malonate, methyl acetoacetate, ethyl acetoacetate, acetyl acetone, butyl mercaptan, dodecyl mercaptan, ε-caprolactam and δ-valerolactam, diphenyl aniline, aniline and ethylene imine, acetanilide, acetic acid amide, formaldehyde, acetaldoxime, acetone oxime, methyl ethyl ketone oxime, cyclohexanone oxime, and combinations thereof.

8. A coated film comprising:
a polyester film, and
a coating layer having a thickness of 0.002 to 0.2 μm and formed on at least one surface of the polyester film which is prepared from a coating solution comprising a (meth)acrylate (A) and at least one crosslinking agent (B) selected from the group consisting of an oxazoline compound, an isocyanate-based compound and a melamine compound,
wherein non-volatile components in the coating solution consist only of a (meth)acrylate (A) and at least one crosslinking agent (B) selected from the group consisting of an oxazoline compound, an isocyanate-based compound and a melamine compound.

Assignees

• Mitsubishi Chem Corp

Inventors

• Sato Takashi
• Kawasaki Taishi
• Fujita Masato

Classifications

• B32B27/08

  of synthetic resin · CPC title

• C08K5/21

  Urea; Derivatives thereof, e.g. biuret · CPC title

• C08J7/0427

  with only one layer of a composition containing a polymer binder (with more layers C08J7/042) · CPC title

• B32B27/36 Primary

  comprising polyesters · CPC title

• C08K5/3415

  Five-membered rings · CPC title