Stretchable film and method for forming the stretchable film
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsJun Hatakeyama, Motoaki Iwabuchi, Osamu Watanabe, Tohru Kubota
Life of this patent
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Abstract
The present invention provides a stretchable film that is excellent in stretch and strength and water repellency on the film surface, and a method for forming the stretchable film. The present invention was accomplished by a stretchable film including a resin having a branched siloxane bond having 3 to 11 silicon atoms on a side chain and having a urethane bond on a main chain.
Claims12
A stretchable film comprising a resin, wherein the resin includes a structure represented by the following general formula (1),
- wherein, each of R1, R2, R3, R5, R6, and R7 independently represents any of a linear or a branched alkyl group, a phenyl group, or a 3,3,3-trifluoropropyl group having 1 to 4 carbon atoms;
- R4 represents any of a linear or a branched alkyl group, a phenyl group, a 3,3,3-trifluoropropyl group, or a trialkylsiloxy group having 1 to 4 carbon atoms;
- each of R8 and R10 independently represents any of a single bond, a methylene group, or an ethylene group, and the total number of carbon atoms of R8 and R10 is 1 or 2;
- R9 represents a hydrogen atom or a linear alkyl group having 1 to 4 carbon atoms;
- R11 represents a hydrogen atom or a methyl group;
- A represents a linear or a branched alkylene group having 1 to 4 carbon atoms;
- and each of “m” and “n” independently represents an integer of 1 to 5.
A method for forming a stretchable film, comprising:
- mixing a diol compound represented by the following general formula (2) and a compound including an isocyanate group;
- shaping the resulting mixture into a film;
- and curing the film by heating,
- wherein, each of R1, R2, R3, R5, R6, and R7 independently represents any of a linear or a branched alkyl group, a phenyl group, or a 3,3,3-trifluoropropyl group having 1 to 4 carbon atoms;
- R4 represents any of a linear or a branched alkyl group, a phenyl group, a 3,3,3-trifluoropropyl group, or a trialkylsiloxy group having 1 to 4 carbon atoms;
- each of R8 and R10 independently represents any of a single bond, a methylene group, or an ethylene group, and the total number of carbon atoms of R8 and R10 is 1 or 2;
- R9 represents a hydrogen atom or a linear alkyl group having 1 to 4 carbon atoms;
- R11 represents a hydrogen atom or a methyl group;
- A represents a linear or a branched alkylene group having 1 to 4 carbon atoms;
- and each of “m” and “n” independently represents an integer of 1 to 5.
A method for forming a stretchable film, comprising:
- shaping a compound including a (meth) acrylate group as a terminal group represented by the following general formula (3) into a film;
- and curing the film by heating and/or light exposure,
- wherein, each of R1, R2, R3, R5, R6, and R7 independently represents any of a linear or a branched alkyl group, a phenyl group, or a 3,3,3-trifluoropropyl group having 1 to 4 carbon atoms;
- R4 represents any of a linear or a branched alkyl group, a phenyl group, a 3,3,3-trifluoropropyl group, or a trialkylsiloxy group having 1 to 4 carbon atoms;
- each of R8 and R10 independently represents any of a single bond, a methylene group, or an ethylene group, and the total number of carbon atoms of R8 and R10 is 1 or 2;
- R9 represents a hydrogen atom or a linear alkyl group having 1 to 4 carbon atoms;
- R11 represents a hydrogen atom or a methyl group;
- each of “m” and “n” independently represents an integer of 1 to 5;
- R12 represents a hydrogen atom or a methyl group;
- A represents a linear or a branched alkylene group having 1 to 4 carbon atoms;
- and each of “p” and “q” independently represents the number of unit in one molecule satisfying equations 1≤p≤100 and 1≤q≤3.
Dependencies are inferred from the claim text.