Abstract: Multiple layer interlayers having enhanced optical and acoustic properties are provided, along with methods of making and using the same. Interlayers as described herein may include at least two outer skin layers and an inner core layer, with one of the outer skin layers having a different thickness than the other at one or more locations along the interlayer. The multi-layer interlayer may also exhibit acoustic properties and, in some cases, may have an overall wedged thickness profile. Additionally, in some aspects, interlayers and laminates formed therefrom may also provide reduced infrared energy transmission, without sacrificing acoustic and/or optical performance.

Abstract: Interlayers that exhibit superior properties and that provide desirable optical properties when incorporated into laminates, such as windshields, windows or other glazings containing a holographic optical element (HOE) are disclosed. The interlayers, when used in a laminate in conjunction with the HOE film, maintain and do not detract from the HOE film properties.

Abstract: A polymer interlayer with improved acoustic properties. The polymer interlayer comprises a first polymer layer, a second polymer layer, and a third polymer layer. The first polymer layer is positioned between the second polymer layer and the third polymer layer. The first polymer layer is formed from a resin comprising polyvinyl acetate (PVAc). The first polymer layer has a Tg of less than about 20° C. and a peak tan ? greater than about 2.0.

Abstract: A polymer interlayer that resists formation of optical defects. The polymer interlayer comprises a first polymer layer, a second polymer layer, and a third polymer layer. The first polymer layer is positioned between the second polymer layer and the third polymer layer. The first polymer layer has a glass transition temperature of less than about 20° C. and the second and third polymer layers each have a glass transition temperature of more than about 25° C. The polymer interlayer has an edge. The first polymer layer is not present within a portion of the polymer interlayer. The portion of the polymer interlayer extends a distance X from the edge of the polymer interlayer, with the distance X being between 0.2 and 40 cm.

Abstract: A method of recovering poly(vinyl butyral) (PVB). The method comprises a step of providing a solvent to a reclamation system. An additional step includes adding a recycled PVB to the solvent and stirring at a certain temperature for a specified time to dissolve the recycled PVB and form a PVB mixture. An additional step includes filtering the PVB mixture to remove the PVB solids. A further step includes subjecting the PVB solids obtained from the PVB mixture to heat obtain recovered PVB polymer.

Abstract: A method of recovering poly(vinyl butyral) (PVB). The method comprises a step of providing a solvent to a reclamation system: adding recycled PVB to the solvent and stirring to form a PVB mixture, wherein the PVB mixture comprises a liquid portion comprising dissolved high PVOH PVB resin and plasticizer, and low PVON PVB solids and plasticizer; and filtering the PVB mixture to remove the low PVOH PVB solids.

Abstract: A method of recovering poly(vinyl butyral) (PVB). The method comprises a step of providing recycled PVB to a reclamation system. An additional step includes adding a solvent the recycled PVB to dissolve the recycled PVB and form a PVB solution. An additional step includes adding a catalyst and butyraldehyde to the PVB solution to form a PVB reaction mixture. An additional step includes heating the PVB reaction mixture. An additional step includes filtering the PVB reaction mixture to remove solids. A further step includes removing the solvent and the butyraldehyde from the PVB reaction mixture to obtain recovered PVB.

Abstract: A polymer interlayer that resists formation of optical defects. The polymer interlayer comprises a first polymer layer, a second polymer layer, and a third polymer layer. The first polymer layer is positioned between the second polymer layer and the third polymer layer. The first polymer layer comprises a resin including an adhesion control agent in the range of about 0.1 to 15 titers.

Abstract: Multiple layer interlayers having enhanced optical and acoustic properties are provided, along with methods of making and using the same. Interlayers as described herein may include at least two outer skin layers and an inner core layer, with one of the outer skin layers having a different thickness than the other at one or more locations along the interlayer. The multi-layer interlayer may also exhibit acoustic properties and, in some cases, may have an overall wedged thickness profile. Additionally, in some aspects, interlayers and laminates formed therefrom may also provide reduced infrared energy transmission, without sacrificing acoustic and/or optical performance.

Abstract: A polymer interlayer that resists optical defects. The polymer interlayer comprises a first polymer layer and a second polymer layer. The first polymer layer is disposed on a first side of the second polymer layer. A non-embossed surface of the first side of the second polymer layer includes a surface roughness. defined by an Rz value, of greater than 40 microns. The polymer interlayer has a mottle value of less than 1.0.

Abstract: An interlayer comprising a first polymer layer, a polarization rotary optical film and optionally a second polymer layer, and multiple layer panels formed from such interlayers. The panels may exhibit desirable optical properties, including, for example, less image “ghosting.” when used as part of a heads-up-display (HUD) display panel for use in automotive and aircraft applications.

Abstract: Tie layers and structures that exhibit superior properties and that provide desirable optical properties when incorporated into laminates, such as windshields, windows or other glazings containing a holographic optical element (HOE) are disclosed. The tie layers, when used in a laminate in conjunction with the HOE film, optionally with additional polymer layers, maintain and do not detract from the HOE film properties.

Abstract: Laminated glazings having improved sound or acoustic properties are disclosed. The laminated glazings comprise two rigid substrates and a multilayer polymer interlayer, and the laminated glazing has a damping loss factor (?) per glazing area (1/m2) measured directly on the laminated glazing of at least 0.0450.

Abstract: Windshields are disclosed herein having an optical path, that include an inner rigid substrate, optically adjacent a first wedge polymer layer, that serves to reflect a primary image. A reflective layer is also provided, positioned in the optical path between the first wedge polymer layer and a second wedge polymer layer. The windshields are further provided with an outer rigid substrate, optically adjacent the second wedge polymer layer. The first wedge polymer layer causes visible light reflected from the reflective layer to overlap the primary image, and the second wedge polymer layer causes visible light reflected from an outer face of the outer rigid substrate to overlap the primary image.

Abstract: Processes are disclosed for separating a first layer from a remainder of a multilayer interlayer sheet, in which the multilayer sheet is heated, and thereafter the first layer is separated from the remainder of the multilayer interlayer sheet by pulling the first layer and the remainder of the multilayer interlayer sheet in different directions, in a defined orientation.

Abstract: Tie layers and structures that exhibit superior properties and that provide desirable optical properties when incorporated into laminates, such as windshields, windows or other glazings containing a holographic optical element (HOE) are disclosed. The tie layers, when used in a laminate in conjunction with the HOE film, optionally with additional polymer layers, maintain and do not detract from the HOE film properties.

Abstract: The invention provides a PVB interlayer sheet having a surface topography on at least one surface which is characterized as having a relatively low profile and a controlled, collapsible surface roughness profile (upon exposure to heat) having a population of significantly more surface peaks than negative peaks (valleys) in certain embodiments and slightly more distant peak spacing than is generally found in embossed PVB interlayers. The PVB interlayer sheets of the invention thus provide very good initial contact and tack of PVB to a glass surface, while leaving very little residual air behind after a first nip in a traditional glass lamination process when compared to other surface designs. The PVB interlayer sheets of the invention also exhibit a wide deairing window which affords greater tolerance of temperature and process variations.

Abstract: Provided are certain poly(vinyl acetal) compositions useful in safety glass construction. The compositions of the invention can be extruded into sheets and serve as interlayers between glass panels. In particular, the compositions comprise one or more solar additives and a divalent magnesium ion and at least 2 carboxylate groups wherein the corresponding carboxylic acids of the carboxylate groups each have a pKa of less than about 4.80. The respective magnesium salts used as adhesion control agents may be hydrates.

Abstract: Polymer interlayers having improved gradient bands and laminates comprising these interlayers are disclosed. The polymer interlayers and laminates comprising polymer interlayers have a gradient band that has a high level of gradient beauty from the perspective of visible light transmittance spectra.

Abstract: A display system for displaying information is disclosed, the display system comprising a glazing that includes a first transparent rigid substrate, a second transparent rigid substrate, and an interlayer positioned between the first and the second transparent rigid substrates; a projector that emits light toward the glazing at three discrete wavelength ranges in the visible spectrum; and at least three narrow band rejectors, disposed in a vision area of the glazing, that selectively reject light within the three wavelength ranges emitted by the projector.