Resin Composition for Protective Layer of Electromagnetic Wave-Shielding Film, Electromagnetic Wave-Shielding Film, and Method for Producing Electromagnetic Wave-Shielding Film
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United States of America Patent
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Issued Date -
Feb 11, 2021
app pub date -
Mar 25, 2019
filing date -
Mar 29, 2018
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Abstract
The present invention provides a resin composition for a protective layer of an electromagnetic wave shielding film, the resin composition having a long pot life and being capable of forming a white protective layer that is not easily discolored even when heated. The resin composition of the present invention is a resin composition for a protective layer of an electromagnetic wave shielding film, wherein the resin composition contains an amorphous polyester resin, a curing agent, and a white pigment, the amorphous polyester resin has a number average molecular weight Mn of less than 20000 and a glass transition temperature Tg of 40° C. or higher, and the curing agent is at least one selected from the group consisting of a blocked isocyanate, an adduct of trimethylolpropane with hexane diisocyanate, and an adduct of isocyanurate with cyclohexane diisocyanate.
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