Abstract:
Provided is a method of making durable hydrophilic and hierarchical structures containing nano and micro features used as dry adhesives. The method includes introduction of hydrophilic, nanostructured features on the micro-scale tips of fibrillar arrays through UV/Ozone (UVO) and oxygen plasma treatment; the method also includes further coating of the hierarchical structure with a polyelectrolyte via electrostatically-driven self-assembly to improve the hydrophilic stability of the treated fibril tip surfaces.
Abstract:
A coated metallic part includes a substrate including a metallic surface; a first coating layer supported on the metallic surface and including a first polymer, the first polymer including silicon; and a second coating layer including a second polymer different from the first polymer, the first coating layer being positioned between the metallic surface and the first coating layer. The first coating layer may have a silicon atomic percentage of 5 to 50 atomic weight percent. The first polymer of the first coating layer may have an oxygen-to-silicon ratio of 1.0 to 4.0. The second polymer of the second polymer layer may include at least one of an acrylic polymer, a polyester, an alkyd, a polyurethane, a polyamide, a polyether, a copolymer thereof, and a mixture thereof.
Abstract:
A coating composition containing a film-forming organosilane polymer and a sterically dispersed macromolecular polymer having silane functional macromonomer chains which react with the silane functionality of the organosilane polymer. The coating composition can be used as the clearcoat over a conventional pigmented basecoat, or as a basecoat or monocoat or primer when a suitable amount of pigment is incorporated therein. The coating composition provides improved chemical resistance and is not prone to cracking.
Abstract:
A coating composition for forming an undercoat layer, which contains a copolymer obtained from the following monomer compounds (i), (ii) and (iii),(i) an acrylic or methacrylic compound,(ii) an alkoxysilyl group-containing acrylic or methacrylic compound and(iii) an acrylic or methacrylic compound having ultraviolet light absorbability such as benzophenone-substituted acrylic monomer or triazole-substituted acrylic monomer,and a coated resin molded article coated with an undercoat layer of the above coating composition, and with an overcoat layer of an organopolysiloxane-containing coating composition.
Abstract:
A roofing membrane has at least five layers, including: a first adhesion layer, a second reinforcing layer over the first layer, a third waterproofing layer over the second layer, a fourth waterproofing protection layer over the third layer, and, a fifth layer over the fourth layer comprising a weathering coating and a sacrificial coating. A method of applying the layers is also disclosed.
Abstract:
The present disclosure provides multilayer films including a first layer disposed adjacent to a painted surface, the first layer comprising, consisting essentially of, or consisting of a semi-polar polymer such as a polysilazane (PSZ), polysiloxazane or a copolymer of polysilazane and polysiloxane repeat units (e.g., a polysiloxazane); and an outer layer disposed opposite the painted surface, the outer layer comprising, consisting essentially of, or consisting of a non-polar material such as a crosslinked hydroxy-terminated polydimethylsiloxane or a crosslinked silanol-terminated polydialkylsiloxane.
Abstract:
An object of the present invention is to provide a laminate which has a substrate, an intermediate layer, and a water-repellent layer laminated in this order, and has excellent abrasion resistance. The present invention is a laminate comprising: a substrate (s) having an anti-reflection layer; an intermediate layer (c) placed on the anti-reflection layer side of the substrate; and a water-repellent layer (r), in this order, wherein the intermediate layer (c) is a cured layer of a mixture composition (cc) of an organosilicon compound (C), or a vapor deposition layer of the organosilicon compound (C), the organosilicon compound (C) contains a silicon atom together with an amino group and/or an amine skeleton, the water-repellent layer (r) is a cured layer of a mixture composition (ca) of an organosilicon compound (A) in which a monovalent group having a perfluoropolyether structure is bound to a silicon atom through a linking group or without a linking group located therebetween, and a hydrolyzable group is bound to the silicon atom through a linking group or without a linking group located therebetween, and the laminate satisfies the following requirement (1),
(1) a water sliding angle is not larger than 50° after a abrasion resistance test in which a 200 g load per 1.5 cm×1.5 cm area is applied to a surface on the water-repellent layer (r) side of the laminate and the surface is rubbed 20,000 times.
Abstract:
Methods of protecting a submerged surface include applying an adhesion-promoting layer onto a surface. An inner polymer layer is applied onto the adhesion-promoting layer. The inner polymer layer is impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage. An outer polymer layer is applied onto the inner polymer layer. The outer polymer layer is impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage and that repels biofouling organisms to prevent invasion of the inner polymer layer.
Abstract:
Provided are an abrasion-resistant, stable and flame-resistant superhydrophobic/superoleophobic coating, and a preparation and application thereof, belonging to the field of new materials; the preparation includes: taking a superhydrophobic/superoleophobic suspension as a top-layer spraying solution; dispersing epoxy resin in a solvent, and adding a fluorine-containing curing agent and a flame retardant for reaction to obtain a bottom-layer spraying solution; and first spraying the bottom-layer spraying solution to a surface of a substrate, then spraying the top-layer spraying solution, and drying the surface to obtain a bilayer abrasion-resistant superhydrophobic flame-resistant coating; the superhydrophobic/superoleophobic suspension contains multi-level micro nano structural particles, a fluorine-containing curing agent and fluorinated epoxy resin; the prepared single-layer coating and bilayer structure (BLC) have hydrophobicity, flame resistance, good mechanical properties and excellent corrosion resistance performance.
Abstract:
A hydrophobic-icephobic composition includes a monomer binder, an organic solvent, and a hydrolyzed organosilane. The hydrolyzed organosilane is represented by a formula of R1—Si—(OH)3. The R1 group comprises an alkyl or a haloalkyl having from 3 to 40 carbons. A hydrophobic-icephobic coating over a substrate includes a polymer base and a polyorganosiloxane. The polyorganosiloxane includes —(R1—Si—O2)- units. The R1 group includes an alkyl or a haloalkyl having from 3 to 40 carbons. One or more of the —(R1—Si—O2)- units of the polyorganosiloxane are may be chemically bonded to the substrate.