摘要:
The present invention relates to a surface-treating agent comprising at least one perfluoro(poly)ether group containing silane compound of the formula (1):
wherein each of symbols is as defined in the description, wherein a number average molecular weight of the perfluoro(poly)ether group containing silane compound is 3000 or more and 6000 or less, and 80 mol% or more of the perfluoro (poly) ether group containing silane compound contained in the surface-treating agent is a compound wherein g is 2 or more.
摘要:
The present invention provides a surface-treating agent for a nitrided surface, comprising a fluorine-containing compound having a carbon-carbon unsaturated bond at its molecular terminal as a group of -Y-A wherein Y is a single bond, an oxygen atom or a divalent organic group, and A is -CH=CH 2 or -C=CH.
摘要:
The present invention relates to a method for grafting polysiloxanes on surfaces of photocatalytic metal oxides by light illumination which comprises at least the following steps: a) providing a surface of a photocatalytically active metal oxide; b) providing a polysiloxane or a mixture of polysiloxanes on the metal oxide surface; c) irradiating the reaction mixture with light in a wavelength range from 180 nm to 550 nm for a sufficient time to generate reactive moieties in said polysiloxanes and to form covalent Si-O-Me (Me = metal) bonds between said reactive moieties of the polysiloxanes and the metal oxide surface; d) optionally separating unreacted polysiloxane molecules from the polysiloxane-grafted metal oxide surface; wherein no silane coupling agent or cross-linking agent needs to be present in the reaction mixture and/or participates in said grafting reaction. A further aspect of the invention relates to the hydrophobic and photocatalytically active polysiloxane-grafted metal oxide surface obtainable by said method and to articles comprising said surface.
摘要:
Processes for preparing oleophobic and hydrophobic coatings on a substrate. More particularly, the disclosure relates to omniphobic surface treatment of substrates such as glass, ceramic, glass-ceramic, and the like.
摘要:
Provided is an anti-fogging coated transparent article including an anti-fog film, the anti-fog film being a single-layer film containing a water-absorbent resin, a hydrophobic group, and a metal oxide component. The hydrophobic group is a chain or cyclic alkyl group having 1 to 30 carbon atoms, preferably a linear alkyl group having 6 to 14 carbon atoms, in which at least one hydrogen atom is optionally substituted by a fluorine atom. The hydrophobic group is bonded directly to a metal atom of the metal oxide component. The anti-fog film contains, for example, the metal oxide component in an amount of 0.01 to 60 parts by mass and the hydrophobic group in an amount of 0.05 to 10 parts by mass per 100 parts by mass of the water-absorbent resin. The water-absorbent resin is, for example, polyvinyl acetal.
摘要:
Described herein are patterned superhydrophobic surfaces, substrates, devices, and systems including the patterned superhydrophobic surfaces, and methods of making and uses thereof.
摘要:
A fluorochemical surface treating agent comprising a hydrolyzable group-containing silane modified with a fluorooxyalkylene-containing polymer and/or a partial hydrolytic condensate thereof forms a water/oil repellent layer having chemical resistance and mar resistance.
摘要:
A method of forming a self-cleaning coating on a substrate comprises the step of selecting a substrate, cleaning the substrate, and/or roughening the substrate using an abrasive. In an embodiment, roughening of the substrate create microscopic tortuous grooves. Another embodiment of the method comprises coating the roughened surface with at least one hydrophobic chemical agent. In an exemplary embodiment, the hydrophobic chemical agent covalently binds with the substrate creating nanoscopic grooves. Another embodiment of the present disclosure pertains to an apparatus for depositing a self-cleaning coating on a flat substrate. A further embodiment of the present disclosure pertains to a self-cleaning coating on a substrate comprising a hydrophobic chemical agent covalently bonded to at least one roughened surface of the substrate.