Stretchable film and method for forming the same

Patent metadata

Field	Value
Publication number	US-11078317-B2
Application number	US-201916255137-A
Country	US
Kind code	B2
Filing date	Jan 23, 2019
Priority date	Jan 31, 2018
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

The present invention is a stretchable film including: a silicone main-chain type urethane layer and a silicone-pendant type urethane layer, wherein the silicone main-chain type urethane layer has a structure shown by the following general formula (1)-1 and/or (1)-2 and is formed on the silicone-pendant type urethane layer, and the silicone-pendant type urethane layer has a structure shown by the following general formula (2)-1 and/or (2)-2. The present invention provides a stretchable film having excellent stretchability and strength, with the film surface having excellent water repellency, together with a method for forming the same.

First claim

The invention claimed is:

1. A stretchable film comprising:
a silicone main-chain type urethane layer and a silicone-pendant type urethane layer,
wherein the silicone main-chain type urethane layer has a structure shown by the following general formula (1)-1 and/or (1)-2 and is formed on the silicone-pendant type urethane layer, and the silicone-pendant type urethane layer has a structure shown by the following general formula (2)-1 and/or (2)-2:

wherein R 1 and R 4 each represent a linear or branched alkylene group having 1 to 40 carbon atoms optionally containing an ether group or a thiol group; R 2 , R 3 , and R 5 represent the same or different linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms, a phenyl group, or a 3,3,3-trifluoropropyl group; R 6 , R 11 , R 12 , and R 13 represent the same or different linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms, a phenyl group, a 3,3,3-trifluoropropyl group, or a —(OSiR 2 R 3 ) s —OSiR 2 R 3 R 5 group; R 7 and R 9 each represent a single bond, a methylene group, or an ethylene group, provided that the total number of the carbon atoms of R 7 and R 9 is 1 or 2; R 8 represents a hydrogen atom or a linear alkyl group having 1 to 4 carbon atoms; R 10 represents a hydrogen atom or a methyl group; “A” represents a linear or branched alkylene group having 3 to 7 carbon atoms; X represents a linear or branched alkylene group having 3 to 7 carbon atoms optionally containing an ether group; “m” and “n” are each an integer in the range of 1 to 100; “p” is an integer in the range of 2 to 10; and “q”, “r”, and “s” are each an integer in the range of 0 to 20.

2. The stretchable film according to claim 1 , wherein the silicone main-chain type urethane layer has a structure containing a (meth)acrylate group at a terminal thereof shown by the following general formula (3)-1 and/or (3)-2:

wherein R 1 to R 5 , “m”, “n”, and “p” are the same as described above; R 14 represents a hydrogen atom or a methyl group; “t” and “u” each represent a number of unit in one molecule, and are integers in the range of 1≤t≤100 and 1≤u≤3.

3. The stretchable film according to claim 1 , wherein the silicone-pendant type urethane layer has a structure containing a (meth)acrylate group at a terminal thereof shown by the following general formula (4)-1 and/or (4)-2:

wherein R 2 , R 3 , R 5 to R 13 , “A”, X, “q”, and “r” are the same as described above; R 14 represents a hydrogen atom or a methyl group; “t” and “u” each represent a number of unit in one molecule, and are integers in the range of 1 t 100 and 1≤u≤3.

4. The stretchable film according to claim 2 , wherein the silicone-pendant type urethane layer has a structure containing a (meth)acrylate group at a terminal thereof shown by the following general formula (4)-1 and/or (4)-2:

wherein R 2 , R 3 , R 5 to R 13 , “A”, X, “q”, and “r” are the same as described above; R 14 represents a hydrogen atom or a methyl group; “t” and “u” each represent a number of unit in one molecule, and are integers in the range of 1 t 100 and 1≤u≤3.

5. The stretchable film according to claim 1 , wherein the stretchable film has a stretching property of 20 to 800% in a tensile test regulated by JIS K 6251.

6. The stretchable film according to claim 2 , wherein the stretchable film has a stretching property of 20 to 800% in a tensile test regulated by JIS K 6251.

7. The stretchable film according to claim 3 , wherein the stretchable film has a stretching property of 20 to 800% in a tensile test regulated by JIS K 6251.

8. The stretchable film according to claim 4 , wherein the stretchable film has a stretching property of 20 to 800% in a tensile test regulated by JIS K 6251.

9. The stretchable film according to claim 1 , wherein the stretchable film is used as a film to be in contact with a conductive wiring having stretchability.

10. The stretchable film according to claim 2 , wherein the stretchable film is used as a film to be in contact with a conductive wiring having stretchability.

11. The stretchable film according to claim 3 , wherein the stretchable film is used as a film to be in contact with a conductive wiring having stretchability.

12. A method for forming a stretchable film comprising:
forming a silicone-pendant type urethane layer having a structure shown by the following general formula (2)-1 and/or (2)-2 through curing by heating and/or light exposure; and
forming a silicone main-chain type urethane layer having a structure shown by the following general formula (1)-1 and/or (1)-2 on a surface of the silicone-pendant type urethane layer through curing by heating and/or light exposure:

wherein R 1 and R 4 each represent a linear or branched alkylene group having 1 to 40 carbon atoms optionally containing an ether group or a thiol group; R 2 , R 3 , and R 5 represent the same or different linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms, a phenyl group, or a 3,3,3-trifluoropropyl group; R 6 , R 11 , R 12 , and R 13 represent the same or different linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms, a phenyl group, a 3,3,3-trifluoropropyl group, or a —(OSiR 2 R 3 ) s —OSiR 2 R 3 R 5 group; R 7 and R 9 each represent a single bond, a methylene group, or an ethylene group, provided that the total number of the carbon atoms of R 7 and R 9 is 1 or 2; R 8 represents a hydrogen atom or a linear alkyl group having 1 to 4 carbon atoms; R 10 represents a hydrogen atom or a methyl group; “A” represents a linear or branched alkylene group having 3 to 7 carbon atoms; X represents a linear or branched alkylene group having 3 to 7 carbon atoms optionally containing an ether group; “m” and “n” are each an integer in the range of 1 to 100; “p” is an integer in the range of 2 to 10; and “q”, “r”, and “s” are each an integer in the range of 0 to 20.

Assignees

• Shinetsu Chemical Co

Inventors

• Hatakeyama Jun
• Iwabuchi Motoaki

Classifications

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L83/10

  Block- or graft-copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00) · CPC title

• C08G18/3212

  containing cycloaliphatic groups · CPC title

• C08G18/4854

  Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group · CPC title

• C08G18/3203

  Polyhydroxy compounds · CPC title