The present invention is directed to a gypsum panel and a method of making a gypsum panel. The gypsum panel comprises a gypsum core and a facing material. The gypsum core includes gypsum, a foaming agent, and optionally starch in an amount of less than 4 wt. % based on the weight of gypsum. The gypsum core includes air voids having an average void size of 50 microns or more. The gypsum panel has a density of 33 pcf or less, a weight of 1,800 lbs/MSF or less, and an NRC value of 0.2 or more.

A composite panel includes a backing substrate and a first plurality of fiber tows. The first plurality of fiber tows is stitched to a first surface of the backing substrate in a predetermined pattern to form a fiber reinforced insert. A first polymer layer encapsulates the first surface of the backing substrate and the first plurality of fiber tows.

A bonded optical assembly comprising infrared-transparent materials. The assembly comprises two or more infrared transparent optical elements and a polymer comprising at least one chalcogenide element and crosslinking moieties between the infrared-transparent optical elements. The crosslinking moieties may be organic, inorganic, or both.

A composite panel includes a backing substrate and a first plurality of fiber tows. The first plurality of fiber tows is stitched to a first surface of the backing substrate in a predetermined pattern to form a fiber reinforced insert. A first polymer layer encapsulates the first surface of the backing substrate and the first plurality of fiber tows.

The present invention is directed to a gypsum panel and a method of making such gypsum panel. For instance, the gypsum panel comprises a gypsum core and a first facing material and a second facing material sandwiching the gypsum core. The gypsum core includes gypsum, a thermal insulation additive, and a shrinkage reduction additive. The gypsum core includes 3 wt. % or less of vermiculite based on the weight of the gypsum in the gypsum core. The gypsum panel passes ASTM E119-20.

The present invention is directed to a gypsum panel and a method of making such gypsum panel. For instance, in one embodiment, the gypsum panel comprises a gypsum core and a first facing material and a second facing material sandwiching the gypsum core, wherein the gypsum core includes gypsum and one or more fire resistance additives. The methods of the present invention are directed to making the aforementioned gypsum panels by providing the first facing material, providing a gypsum slurry comprising gypsum, water, and one or more fire resistance additives onto the first facing material, and providing a second facing material on the gypsum slurry.

A method for joining quartz pieces using metallic aluminum as the joining element. The aluminum may be placed between two quartz pieces and the assembly may be heated in the range of 500 C to 650 C. The joining atmosphere may be non-oxygenated. A method for the joining of quartz pieces which may include barrier layers on the quartz pieces. The barrier layers may be impervious to aluminum diffusion and may be of a metal oxide or metal nitride. The quartz pieces with the barrier layers may then be joined at temperatures higher than 650 C and less than 1200 C. A device such as an RF antenna or electrode in support of semiconductor processing using joined quartz pieces wherein the aluminum joining layer which has joined the pieces and also functions as antenna electrode.

A method for joining quartz pieces using metallic aluminum as the joining element. The aluminum may be placed between two quartz pieces and the assembly may be heated in the range of 500 C to 650 C. The joining atmosphere may be non-oxygenated. A method for the joining of quartz pieces which may include barrier layers on the quartz pieces. The barrier layers may be impervious to aluminum diffusion and may be of a metal oxide or metal nitride. The quartz pieces with the barrier layers may then be joined at temperatures higher than 650 C and less than 1200 C. A device such as an RF antenna or electrode in support of semiconductor processing using joined quartz pieces wherein the aluminum joining layer which has joined the pieces and also functions as antenna electrode.

A method for producing a curved laminated glazing, for a windscreen or roof of a motor vehicle includes providing a first glass sheet, coated on at least one part of one of its faces with a stack of thin layers, depositing, on one part of the surface of the stack of thin layers in a zone to be cleared, a washable dissolving layer, a pre-firing after which the stack of thin layers located under the washable dissolving layer is dissolved by the washable dissolving layer, creating a cleared zone, the removal of the washable dissolving layer by washing, the deposit, at least on one part of the cleared zone, of an opaque mineral layer, the curving of the first glass sheet and of an additional glass sheet, together or separately, and the laminating of the first glass sheet with an additional glass sheet using a lamination interlayer.

The present invention is directed to the use of a composite comprising a layer (L1) selected from the group of polyurethane layers, polyisocyanurat layers and polyurea layers as a landfill liner as well as a process for preparing a composite landfill liner comprising a layer (L1) selected from the group of polyurethane layers, polyisocyanurat layers and polyurea layers, the process comprising the step of applying a reaction mixture which is suitable to form a product selected from the group of polyurethane, polyisocyanurat and polyurea products onto a surface. Furthermore, the present invention is directed to a composite comprising a layer (L1) selected from the group of polyurethane layers, polyisocyanurat layers and polyurea layers, a primer layer on one surface of layer (L1), and a protective layer (L2) selected from the group of mortar layers or elastomer layers on the surface of the primer layer. In particular, the present invention is directed to the use of a composite comprising a polyurethane foam layer (L1) as a landfill liner, wherein the layer (L1) comprises a spray product as well as a preparing a composite landfill liner comprising a polyurethane foam layer (L1), the process comprising the step of applying a reaction mixture which is suitable to form a polyurethane foam onto a surface. Finally, the present invention is directed to a composite comprising a polyurethane foam layer (L1), a primer layer on one surface of layer (L1), and a protective layer (L2) selected from the group of mortar layers or elastomer layers on the surface of the primer layer.