Composition for electrode protective film of electrostatic capacitance-type input device, electrode protective film of electrostatic capacitance-type input device, transfer film, laminate, electrostatic capacitance-type input device, and image display device

Patent metadata

Field	Value
Publication number	US-11669013-B2
Application number	US-201815898318-A
Country	US
Kind code	B2
Filing date	Feb 16, 2018
Priority date	Sep 30, 2015
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

A composition for an electrode protective film of an electrostatic capacitance-type input device including (a) a binder polymer, (b) a photopolymerizable compound having an ethylenic unsaturated group, (c) a photopolymerization initiator, and (d) a compound capable of reacting with acidic groups or alcoholic hydroxy groups by heating, in which (b) the photopolymerizable compound having an ethylenic unsaturated group includes (b1) a photopolymerizable compound in which a value obtained by dividing a weight-average molecular weight by an average number of polymerizable groups is 270 or more can be used to form electrode protective films of electrostatic capacitance-type input devices having favorable bending resistance; an electrode protective film of an electrostatic capacitance-type input device; a transfer film; a laminate; an electrostatic capacitance-type input device; and an image display device.

First claim

What is claimed is:

1. A composition for an electrode protective film of an electrostatic capacitance-type input device comprising:
(a) a binder polymer which is an acrylic resin having carboxyl groups;
(b) a photopolymerizable compound having an ethylenic unsaturated group;
(c) a photopolymerization initiator; and
(d) a compound capable of reacting with acidic groups or alcoholic hydroxy groups by heating,
wherein (b) the photopolymerizable compound having an ethylenic unsaturated group includes (b1) a photopolymerizable compound in which a value obtained by dividing a weight-average molecular weight by an average number of polymerizable groups is 270 or more,
(d) the compound capable of reacting with acidic groups or alcoholic hydroxy groups by heating has no ethylenic unsaturated group,
the ratio of (b1) the photopolymerizable compound in which a value obtained by dividing the weight-average molecular weight by an average number of polymerizable groups is 270 or more to all of (b) the photopolymerizable compound having an ethylene ethylenic unsaturated group is from 15% by mass to 60% by mass; and
the photopolymerizable compound (b1) in which a value obtained by dividing a weight-average molecular weight by an average number of polymerizable groups is 270 or more is a difunctional or a trifunctional photopolymerizable compound.

2. The composition for an electrode protective film of an electrostatic capacitance-type input device according to claim 1 ,
wherein, in an electrode protective film of an electrostatic capacitance-type input device obtained by curing the composition for an electrode protective film of an electrostatic capacitance-type input device, a breaking elongation is 5% or more in a tensile test under an environment of 23° C. and a relative humidity of 50%.

3. The composition for an electrode protective film of an electrostatic capacitance-type input device according to claim 1 ,
wherein (b) the photopolymerizable compound having an ethylenic unsaturated group includes (b1-1) a photopolymerizable compound in which a value obtained by dividing a weight-average molecular weight by an average number of polymerizable groups is 800 or more.

4. The composition for an electrode protective film of an electrostatic capacitance-type input device according to claim 1 ,
wherein, in the composition for an electrode protective film of an electrostatic capacitance-type input device, a ratio of (b1) the photopolymerizable compound in which a value obtained by dividing a weight-average molecular weight by an average number of polymerizable groups is 270 or more to all of (b) the photopolymerizable compound having an ethylenic unsaturated group is 15% by mass to 44.38% by mass.

5. The composition for an electrode protective film of an electrostatic capacitance-type input device according to claim 1 ,
wherein, in the composition for an electrode protective film of an electrostatic capacitance-type input device, a ratio of (b1) the photopolymerizable compound in which a value obtained by dividing a weight-average molecular weight by an average number of polymerizable groups is 270 or more to a total solid content is 5% by mass or more.

6. The composition for an electrode protective film of an electrostatic capacitance-type input device according to claim 1 ,
wherein (d) the compound capable of reacting with acidic groups or alcoholic hydroxy groups by heating is a blocked isocyanate.

7. The composition for an electrode protective film of an electrostatic capacitance-type input device according to claim 1 ,
wherein (d) the compound capable of reacting with acidic groups or alcoholic hydroxy groups by heating is a compound having a structure represented by General Formula (1);

in General Formula (1), R 1 to R 3 each independently represent a monovalent organic group.

8. An electrode protective film of an electrostatic capacitance-type input device formed, over a substrate, of the composition for an electrode protective film of an electrostatic capacitance-type input device according to claim 1 .

9. A transfer film comprising:
a temporary support; and
a photosensitive resin layer including the composition for an electrode protective film of an electrostatic capacitance-type input device according to claim 1 ,
wherein the thickness of the photosensitive resin layer is 2 to 15 μm.

10. A laminate comprising:
an electrode protective film of an electrostatic capacitance-type input device formed by transferring the electrode protective film of an electrostatic capacitance-type input device according to claim 8 onto a substrate including an electrode of an electrostatic capacitance-type input device.

11. A laminate comprising:
a substrate including an electrode of an electrostatic capacitance-type input device; and
a photosensitive resin layer located on the substrate,
wherein the photosensitive resin layer includes (a) a binder polymer which is an acrylic resin having carboxyl groups, (b) a photopolymerizable compound having an ethylenic unsaturated group, (c) a photopolymerization initiator, and (d) a compound capable of reacting with acidic groups or alcoholic hydroxy groups by heating,
(b) the photopolymerizable compound having an ethylenic unsaturated group includes (b1) a photopolymerizable compound in which a value obtained by dividing a weight-average molecular weight by an average number of polymerizable groups is 270 or more,
(d) the compound capable of reacting with acidic groups or alcoholic hydroxy groups by heating has no ethylenic unsaturated group,
the ratio of (b1) the photopolymerizable compound in which a value obtained by dividing the weight-average molecular weight by an average number of polymerizable groups is 270 or more to all of (b) the photopolymerizable compound having an ethylenic unsaturated group is from 15% by mass to 60% by mass, and
the photopolymerizable compound (b1) in which a value obtained by dividing a weight-average molecular weight by an average number of polymerizable groups is 270 or more is a difunctional or a trifunctional photopolymerizable compound.

12. The laminate according to claim 10 ,
wherein the electrode of an electrostatic capacitance-type input device includes at least one kind of metal selected from Au, Ag, Cu, and Al or an alloy including at least one kind of metal selected from Au, Ag, Cu, and Al.

13. The laminate according to claim 11 ,
wherein the photosensitive resin layer is cured.

14. An electrostatic capacitance-type input device comprising:
the laminate according to claim 10 .

15. An image display device comprising:
the electrostatic capacitance-type input device according to claim 14 .

16. The composition for an electrode protective film of an electrostatic capacitance-type input device according to claim 1 ,
wherein (d) the compound capable of reacting with acidic groups or alcoholic hydroxy groups by heating is a blocked isocyanate protected with a thermally dissociable blocking agent, and
the thermally dissociable blocking agent is at least one of an oxime-based compound, an acid amide-based compound, an amine-based compound, an active methylene-based compound, and a pyrazole-based compound.

17. The composition for an electrode protective film of an electrostatic capacitance-type input device according to claim 1 ,
wherein, in the composition for an electrode protective film of an electrostatic capacitance-type input device, a ratio of (b1) the photopolymeri

Assignees

• Fujifilm Corp

Inventors

• Kanna Shinichi

Classifications

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• C08F265/06

  Polymerisation of acrylate or methacrylate esters on to polymers thereof · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• C07D251/32

  Cyanuric acid; Isocyanuric acid · CPC title