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US 2019/0315972 A1Published application
Water repellent film-forming composition and water repellent film
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsAyumu Kiyomori, Shotaro Aoki, Masato Kawakami, Tohru Kubota
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Abstract
A composition is provided comprising (a) a polysilazane having a monovalent hydrocarbon group, (b) untreated metal oxide nanoparticles, metal oxide nanoparticles having a monovalent hydrocarbon group, or metal oxide nanoparticles having an alkylsilyl or alkoxysilyl group, and (c) an aprotic solvent. The composition has storage stability and is suitable for forming a film having water repellent, especially superhydrophobic properties.
Claims5
A water repellent film-forming composition comprising:
- (a) a polysilazane having an optionally fluorinated C3-C20 monovalent hydrocarbon group bonded to a silicon atom,
- (b) untreated metal oxide nanoparticles, metal oxide nanoparticles having an optionally fluorinated C1-C20 monovalent hydrocarbon group on their surface, or metal oxide nanoparticles having an alkylsilyl or alkoxysilyl group on their surface, and
- (c) an aprotic solvent.
A water repellent film comprising:
- (a) a polysilazane having an optionally fluorinated C3-C20 monovalent hydrocarbon group bonded to a silicon atom, and
- (b) untreated metal oxide nanoparticles, metal oxide nanoparticles having an optionally fluorinated C1-C20 monovalent hydrocarbon group on their surface, or metal oxide nanoparticles having an alkylsilyl or alkoxysilyl group on their surface.
Dependencies are inferred from the claim text.