Laminated film

Patent metadata

Field	Value
Publication number	US-10696865-B2
Application number	US-201715721747-A
Country	US
Kind code	B2
Filing date	Sep 30, 2017
Priority date	Sep 30, 2016
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A laminated film appropriate as a PPF material which has a three-layer structure in which a top coating layer including a urethane acrylate cured product, a substrate layer including polycarbonate thermoplastic polyurethane, and an adhesive layer including a pressure sensitive adhesive are in contact in that order. Preferably, the top coating layer includes a unit derived from γ-methacryloxypropylhepta(trifluoropropyl)-T8-silsesquioxane.

First claim

What is claimed is:

1. A laminated film having a three-layer structure in which a top coating layer comprising an urethane acrylate and a fluorine-containing compound, a substrate layer consisting of polycarbonate thermoplastic polyurethane, and an adhesive layer made of a pressure sensitive adhesive are in contact in that order, wherein an amount of the fluorine-containing compound is 0.1 parts by weight to 10 parts by weight with respect to 100 parts by weight of the urethane acrylate, and the polycarbonate thermoplastic polyurethane has a soft segment block and a hard segment block, the soft segment block has a polycarbonate diol unit having a number average molecular weight of 500 to 10,000 and an organic diisocyanate unit, and the hard segment block has a chain extender selected from organic diols having a number average molecular weight of 60 to 400 and an organic diisocyanate unit.

2. The laminated film according to claim 1 ,
wherein the fluorine-containing compound comprises a structural unit derived from a fluorosilsesquioxane derivative represented by the following Formula (1),

in Formula (1), R f 1 to R f 7 each independently represent a linear fluoroalkyl group having 1 to 20 carbon atoms or a branched fluoroalkyl group having 3 to 20 carbon atoms in which any methylene may be substituted with oxygen; a fluoroaryl group having 6 to 20 carbon atoms in which at least one hydrogen atom is substituted with fluorine or trifluoromethyl; or a fluoroarylalkyl group having 7 to 20 carbon atoms in which at least one hydrogen atom in an aryl group is substituted with fluorine or trifluoromethyl, and A 1 is a group represented by the following Formula (1-1) or Formula (1-2),

in Formula (1-1), Y 3 represents an alkylene group having 2 to 10 carbon atoms, and R 6 represents hydrogen or a linear alkyl group having 1 to 5 carbon atoms or a branched alkyl group having 3 to 5 carbon atoms, or an aryl group having 6 to 10 carbon atoms,

in Formula (1-2), Y 4 represents a single bond or an alkylene group having 1 to 10 carbon atoms.

3. The laminated film according to claim 1 ,
wherein the fluorine-containing compound comprises a structural unit derived from γ-methacryloxypropylhepta(trifluoropropyl)-T8-silsesquioxane represented by the following Formula (5),

4. The laminated film according to claim 1 , further comprising
a release layer.

5. A paint protection film (PPF) comprising the laminated film according to claim 1 .

Assignees

• Jnc Corp

Inventors

• Ito Kenya
• Iizuka Hiroyuki
• SATO Shino
• Shiraishi Yasuhiro

Classifications

• C08G18/7671 Primary

  containing only one alkylene bisphenyl group · CPC title

• C09J2301/302

  the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C · CPC title

• C09J2301/162

  the carrier being a laminate constituted by plastic layers only · CPC title

• C09J2301/122

  the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape · CPC title

• C08G2170/40

  Compositions for pressure-sensitive adhesives · CPC title