Stretchable film, method for forming the same, stretchable wiring film, and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-10584221-B2
Application number	US-201715789249-A
Country	US
Kind code	B2
Filing date	Oct 20, 2017
Priority date	Nov 17, 2016
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

The present invention provides a stretchable film including: a cured product of a composition which contains (A) a poly(meth)acrylate compound having a polymerizable double bond and a siloxane bond, (B) a (meth)acrylate compound having a urethane bond, and (C) an organic solvent having a boiling point in the range of 115 to 200° C. at atmospheric pressure; wherein the component (A) is localized in the direction of the surface of the film. The stretchable film of the present invention is excellent in stretchability and strength as well as repellency on the film surface.

First claim

The invention claimed is:

1. A stretchable film comprising:
a cured product of a composition which contains (A) a poly(meth)acrylate compound having a polymerizable double bond and a siloxane bond, (B) a (meth)acrylate compound having a urethane bond, (C) an organic solvent having a boiling point in the range of 115 to 200° C. at atmospheric pressure, and (D) a thermal- or photo-radical generator;
wherein
the component (A) is localized in the direction of a surface of the film,
the ratio of the component (A) is in the range of 0.1 to 35% by mass based on the total mass of solid contents in the composition excluding the component (C), and
the component (C) is present in an amount range of 5 to 1,000 parts by mass based on 100 parts by mass of the solid contents in the composition.

2. The stretchable film according to claim 1 , wherein the component (A) is a polymer compound having a repeating unit-a1 shown by the following general formula (1-a1) and/or a repeating unit-a2 shown by the following general formula (1-a2) as well as a repeating unit-b shown by the following general formula (1-b):

wherein R 1 , R 4 , R 11 , and R 13 each independently represent a hydrogen atom or a methyl group; R 2 represents a single bond or a linking group shown by the following general formula (2); each R 3 is the same or different, and represents a hydrogen atom, a hydroxy group, a linear, branched, or cyclic hydrocarbon group having 1 to 10 carbon atoms, or a fluorinated alkyl group, optionally containing an ether group, a lactone group, an ester group, a hydroxy group, or a cyano group, and two R 3 are optionally bonded with each other to form an ether group; R 6 to R 10 each independently represent a linear, branched, or cyclic alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a trimethylsilyloxy group, R 6 and R 10 are optionally bonded with each other to form a ring, in which case R 6 and R 10 are bonded to form an ether group; R 12 represents a linear, branched, or cyclic alkylene group, alkenylene group, or alkynylene group having 2 to 20 carbon atoms, or an arylene group having 6 to 10 carbon atoms, optionally having an ether group, an ester group, a thiol group, a hydroxy group, an alkoxy group, an amide group, or a urethane group; X 1 represents an ester group or —C(═O)—O—R 17 —; X 2 represents a single bond, an ester group, or —C(═O)—O—R 17 —; X 3 represents a phenylene group or an ester group; X 4 represents an ether group, a phenylene group, or an ester group; R 5 and R 17 each independently represent a linear, branched, or cyclic alkylene group having 1 to 14 carbon atoms, a linear, branched, or cyclic alkenylene group or alkynylene group having 2 to 14 carbon atoms, or an arylene group having 6 to 10 carbon atoms, optionally having an ether group, an ester group, an amide group, or a urethane group; “m” is an integer of 4 to 40, “m′” is 0 or 1, “n” is an integer of 0 to 40; “a1”, “a2”, and “b” satisfy 0≤a1<1.0, 0≤a2<1.0, 0<a1+a2<1.0, 0<b<1.0; and a part of a siloxane bond in the (R 3 —SiO 3/2 ) m unit is optionally cut to form a silanol group;

wherein R 14 and R 15 each independently represent a linear, branched, or cyclic alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a trimethylsilyloxy group; R 16 represents a single bond, an oxygen atom, or an alkylene group having 1 to 4 carbon atoms; and “p” is an integer of 1 to 20.

3. The stretchable film according to claim 1 , wherein the component (B) is a compound shown by the following general formula (3):

wherein R 23 represents a hydrogen atom or a methyl group; R 20 and R 22 each independently represent a single bond, a linear, branched, or cyclic alkylene group having 1 to 20 carbon atoms, an arylene group having 6 to 20 carbon atoms, or an alkenylene group having 2 to 20 carbon atoms, optionally having one or more group selected from an ether group, an ester group, an aryl group, and an arylene group; R 21 represents a single bond or a divalent hydrocarbon group having 1 to 15 carbon atoms; X represents a single bond or a divalent hydrocarbon group having 1 to 12 carbon atoms, optionally containing one or more group selected from an ether group, an ester group, and a carbonate group; one of Y 1 and Y 2 represents an oxygen atom, and the other represents a NH group; “e” is an integer of 1 to 100, “f” is an integer of 0 to 200, and “g” is an integer of 0 to 200.

4. The stretchable film according to claim 1 , wherein the component (C) is one or more organic solvents selected from the group consisting of 2-octanone, 2-nonanone, 2-heptanone, 3-heptanone, 4-heptanone, 2-hexanone, 3-hexanone, diisobutyl ketone, methylcyclohexanone, acetophenone, methylacetophenone, propyl acetate, butyl acetate, isobutyl acetate, amyl acetate, butenyl acetate, isoamyl acetate, phenyl acetate, propyl formate, butyl formate, isobutyl formate, amyl formate, isoamyl formate, methyl valerate, methyl pentenoate, methyl crotonate, ethyl crotonate, propylene glycol monomethyl ether, ethylene glycol monomethyl ether, propylene glycol monoethyl ether, ethylene glycol monoethyl ether, propylene glycol dimethyl ether, diethylene glycol dimethyl ether, propylene glycol monomethyl ether acetate, and propylene glycol monoethyl ether acetate.

5. The stretchable film according to claim 1 , wherein the stretchable film has a stretching property of 40 to 600% regulated by JIS K 6251.

6. The stretchable film according to claim 1 , wherein the stretchable film is used as a film for covering a conductive wiring having stretchability.

7. A method for forming a stretchable film comprising:
coating a substrate with a composition which contains (A) a poly(meth)acrylate compound having a polymerizable double bond and a siloxane bond, (B) a (meth)acrylate compound having a urethane bond, (C) an organic solvent having a boiling point in the range of 115 to 200° C. at atmospheric pressure, and (D) a thermal- or photo-radical generator;
evaporating the component (C) by heating, while localizing the component (A) in the direction of a surface of the film; and thereafter
curing the component (A) and the component (B) by heat or light irradiation.

8. The method for forming a stretchable film according to claim 7 , wherein the ratio of the component (A) is in the range of 0.1 to 35% by mass based on the total mass of solid contents in the composition excluding the component (C).

9. The method for forming a stretchable film according to claim 7 , wherein the component (A) is
a polymer compound having a repeating unit-a1 shown by the following general formula (1-a1) and/or a repeating unit-a2 shown by the following general formula (1-a2) as well as a repeating unit-b shown by the following general formula (1-b):

wherein R 1 , R 4 , R 11 , and R 13 each independently represent a hydrogen atom or a methyl group; R 2 represents a single bond or a linking group shown by the following general formula (2); each R 3 is the same or different, and represents a hydrogen atom, a hydroxy group, a linear, branched, or cyclic hydrocarbon group having 1 to 10 carbon atoms, or a fluorinated alkyl group, optionally containing an ether group,

Assignees

• Shinetsu Chemical Co

Inventors

• Hatakeyama Jun
• Iwabuchi Motoaki

Classifications

• C09D175/16

  having terminal carbon-to-carbon unsaturated bonds · CPC title

• C08J2375/16

  having terminal carbon-to-carbon unsaturated bonds · CPC title

• C08J2351/00

  Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers · CPC title

• C08G18/4825

  Polyethers containing two hydroxy groups (C08G18/4833 - C08G18/5096 take precedence) · CPC title

• C08J3/24

  Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K) · CPC title