Abstract:
Coating compositions are described comprising an aqueous polymeric dispersion; a crosslinker; and an acid or salt of a polyalkylene oxide. Also described are articles comprising the dried and cured coating composition disposed on a substrate as well as a method a providing an anti-fog coating on a substrate.
Abstract:
Methods for bonding a polymer surface (e.g., a fluoropolymer surface) to a substrate, including foam tape substrates, and articles produced thereby. The methods can include using a primer composition having an amidine catalyst in combination with an amino-substituted organosilane ester.
Abstract:
Pressure sensitive adhesive tapes having flame retarding properties include a backing and a pressure sensitive adhesive layer. The pressure sensitive adhesive layer includes a (meth)acrylate-based block copolymer, and may also include at least 10% by weight of a halogen-free flame retarding agent. The adhesive layer may contain additional optional additives such as tackifying resins, plasticizers, and the like. The tapes are prepared by coating the flame retarding pressure sensitive adhesive onto the backing, either in solvent or by a solventless process.
Abstract:
A transparent anti-reflective structured film comprising a structured film substrate having a structured face, with anti-reflective structures defining a structured surface. The structured face is anti-reflective to light, with at least a substantial portion of the structured surface comprising a glass-like surface. At least the anti-reflective structures comprise a cross-linked silicone elastomeric material, and the glass-like surface comprises an SiO 2 stoichiometry. The glass-like surface is coated with a coating of at least one layer of agglomerates of silica nanoparticles, with the agglomerates comprising a three-dimensional porous network of silica nanoparticles, and the silica nanoparticles being bonded to adjacent silica nanoparticles. A light energy absorbing device comprising the transparent anti-reflective structured film disposed so as to be between a source of light energy and a light energy receiving face of a light absorber, when light energy is being absorbed by the light absorber.
Abstract:
The present application is directed to a method of providing a coating to a surface of an optical element of a solar energy conversion system. The method comprises coating the surface of the optical element with an aqueous coating composition comprising water and silica nanoparticles dispersed in the water; and drying the coating composition to form a nanoparticle coating. The silica nanoparticles comprise a polymer core surrounded by a shell comprising nonporous silica particles disposed on the polymer core.
Abstract:
A fibrous article, comprising polymeric fibers comprising a coupling agent and surface-modified silica nanoparticles, wherein the surface-modified silica nanoparticles comprise an acidic surface modifying agent and render the polymeric fibers hydrophilic.
Abstract:
A coated article having a substrate coated with a layer of acicular silica particles is provided. The coating is substantially uniform in thickness, durably adheres to the substrate, and provides antireflection and or hydrophilic surface properties to the substrate.
Abstract:
A coating composition which imparts antifog properties to substrates coated therewith. The coating compositions are removable and utilize nanoparticles funtionalized with epoxy groups. The removable coating compositions are particularly useful on personal protection equipment such as face masks, shields, and protective glasses.
Abstract:
The present disclosure relates to accelerating a ninhydrin reaction within an indicator solution. The indicator solution comprises ninhydrin and an accelerant selected from the group consisting of at least 50% wt. isopropyl alcohol and a lithium salt. The indicator solution produces a color change in the presence of a protein or amine in less than 5 minutes under an ambient temperature condition.
Abstract:
A color changing indicator that is physically entrapped onto a substrate produces a reactive article. In one embodiment, the reactive article comprises a substrate, a color changing indicator that produces a color change in response to a stimulus, and a delivery mechanism containing the color changing indicator. The delivery mechanism is secured to the substrate. The stimulus is capable of penetrating the delivery mechanism to produce a visually discernable color change of the color changing indicator.