Abstract:
Release layers that can be included in various adhesive tape products and release liners for adhesive layers are provided. The release layer is a cured reaction product of a curable release composition that contains i) a siloxane polymer having at least two hydrolyzable groups and having a weight average molecular weight of at least 1000 Daltons, ii) a crosslinker, iii) a silane additive, iv) a photoacid generator, and v) an optional silicate resin. The crosslinker is a compound of formula Si(OR5)4 or is a compound having at least two silyl groups of formula —Si(R4)x(OR5)3-x where R4 is alkyl or aryl, R5 is alkyl, and the variable xis an integer equal to 0 or 1. The silane additive is a compound having two silyl groups of formula —Si(R6)2(OR7) or a single silyl group of formula —Si(R10) (OR9)2 where R6 is alkyl or aryl, R7 is alkyl, R9 is alkyl, and R10 is alkyl or aryl.
Abstract:
A method of making an adhesive article comprises three steps. First, a backing is provided having first and second opposed major surfaces with respective first and second silicone release layers disposed thereon. The second silicone release layer further comprises organic solvent and a compound represented by the formula: R1 represents a monovalent, divalent, or trivalent hydrocarbon radical having from 2 to 40 carbon atoms or covalent bond. Rf represents a perfluorinated group having from 3 to 5 carbon atoms. X1 represents —NH— or a covalent bond. Second, an adhesive layer is disposed onto the first silicone release layer. Third, the adhesive layer is exposed to E-beam radiation within a process chamber containing oxygen to provide a crosslinked adhesive layer. An adhesive article made by the method and the compound are also disclosed.
Abstract:
Disclosed herein is an optical device having a light source and a viscoelastic lightguide. Light from the light source enters the viscoelastic lightguide and is transported within the lightguide by total internal reflection. The viscoelastic lightguide may comprise a pressure sensitive adhesive. The optical device may be used in a variety of constructions wherein the device emits light being transported within the viscoelastic lightguide. Constructions include those used for signs, markings, illumination devices, display devices, keypad assemblies and tail light assemblies for vehicles.
Abstract:
A method of making an adhesive article includes providing a liner having first and second silicone release layer disposed on opposite sides thereof, applying the onium salt photoacid generator onto at least a portion of the first silicone release layer to provide a modified silicone release layer, disposing an adhesive layer onto the second silicone release layer, and and exposing at least the adhesive layer to electron beam radiation within a process chamber thereby providing a crosslinked adhesive layer, wherein the process chamber contains oxygen, wherein the modified silicone release layer is exposed to the oxygen during crosslinking of the adhesive layer. The first silicone release layer does not contain an onium salt photoacid generator. An adhesive article made by the method is also disclosed.
Abstract:
A transparent electrode is described and includes metallic nanowires and a polymeric overcoat layer for protecting the nanowires from corrosion and abrasion. The polymeric overcoat layer includes nanoparticles, particularly antimony tin oxide, zinc oxide and/or indium tin oxide, and has a sheet resistance of greater than about 107 ohm/sq. The transparent electrode can be used in electronic displays such as polymer-dispersed liquid crystal, liquid crystal, electrophoretic, electrochromic, thermochromic, electroluminescent and plasma displays.
Abstract:
Provided are methods of making a transfer tape in which first and second release coatings are disposed onto respective first and second major surfaces of a backing to provide a release liner, the first release coating comprising wax particles at least partially embedded in a polymeric layer. An adhesive precursor is coated onto the first release coating and the adhesive precursor and the release liner collectively irradiated with an electron beam to convert the adhesive precursor into an adhesive layer. Advantageously, the provided transfer tape can be wound into a roll and stored for long periods without exhibiting degradation of release properties attributable to either blocking or electron beam degradation of the liner release coating.
Abstract:
Disclosed herein is an optical device having a light source, a viscoelastic lightguide and a retroreflective film suitable for retroreflecting light. Light from the light source enters the viscoelastic lightguide and is transported within the lightguide by total internal reflection. The transported light is extracted from the lightguide and retroreflected at a structured surface of the retroreflective film. The optical device may have a “front lit” or a “back lit” configuration depending on the relative positioning of the lightguide and the retroreflective film. The retroreflective film may include prismatic retroreflective sheeting, holographic film or film structured with diffraction gratings. The optical device may be used, for example, as a sign or marking, a license plate assembly, a tail light assembly for vehicles, a security laminate for protection of documents against tampering, or an illumination device.
Abstract:
An electronically switchable privacy films suitable for use in display devices are described. The electronically switchable privacy film comprises a pair of mutually opposing transparent electrodes; an optically transparent microstructured layer disposed between the transparent electrodes, the microstructured layer comprising a plurality of microstructured ribs extending across a surface thereof such that the microstructured ribs form an alternating series of ribs and channels; and electronically switchable material disposed in the channels, the electronically switchable material being capable of modulation between high and low absorption states upon application of an electric field across the transparent electrodes.
Abstract:
An electronically switchable privacy film suitable for use in display devices are described. The electronically switchable privacy film comprises a pair of mutually opposing transparent electrodes; an optically transparent microstructured layer disposed between the transparent electrodes, the microstructured layer comprising a plurality of microstructured ribs extending across a surface thereof such that the microstructured ribs form an alternating series of ribs and channels; and electronically switchable material disposed in the channels, the electronically switchable material being capable of modulation between high and low light scattering states upon application of an electric field across the transparent electrodes.
Abstract:
Blended release materials including a blend of a fluoro-functional silicone release polymer and a fluoropolymer are described. Exemplary fluoropolymers include fluoroolefin-based polymers and linear fluoropolymers including linear fluoroacryaltes. Articles including such release materials such as release liners, and adhesive articles, including silicone adhesive articles, are also described.