A gypsum slurry includes water, a hydraulic component including calcium sulfate hemihydrate and a linear polycarboxylate dispersant. The linear polycarboxylate anionic dispersant includes a first monomeric repeating unit and a second monomeric repeating unit. The first repeating unit of the linear polycarboxylate dispersant is an olefinic unsaturated carboxylic acid repeating unit or salt thereof. The second repeating unit of the linear polycarboxylate dispersant is a vinyl sulfonate. The slurry can be made into a gypsum panel. Methods of making gypsum slurry and a gypsum panel are also disclosed.

A gypsum slurry includes water, a hydraulic component including calcium sulfate hemihydrate and a linear polycarboxylate dispersant. The linear polycarboxylate anionic dispersant includes a first monomeric repeating unit and a second monomeric repeating unit. The first repeating unit of the linear polycarboxylate dispersant is an olefinic unsaturated carboxylic acid repeating unit or salt thereof. The second repeating unit of the linear polycarboxylate dispersant is a vinyl sulfonate. The slurry can be made into a gypsum panel. Methods of making gypsum slurry and a gypsum panel are also disclosed.

Disclosed is an improved facer mat for use as a cover sheet for gypsum board. Also disclosed are gypsum boards containing such mat facers on one or both major surfaces of the board (face and back sides when installed), a method of manufacturing such board, and a method of making the mat. The mat can comprise glass, thermoplastic, and/or thermoset fiber. In preferred embodiments, binder is included with the fiber. The mat has outer and inner surfaces. The mat comprises a first region adjacent to the outer surface defined along a horizontal plane of the mat, the first region having a first substantial thickness, and a second region adjacent to the inner surface defined along a horizontal plane of the mat, the second region having a second substantial thickness. The first region has (a) more hydrophilicity than the second region, (b) more wettability than the second region, and/or (c) less density than the second region.

A panel suitable for forming a floor covering by assembling a plurality of said panels adjacent to each other, which is of a substantially planar design, having a planar top side and a planar bottom side, said panel being composed from a layered structure that comprises: a waterproof core layer; a top layer adhered on the top side of said core layer,
wherein the top layer comprises at least one ply of cured resin impregnated paper; an adhesive layer between the core layer and the top layer;
characterized in that
the adhesive layer is a cured mixture which comprises a polymeric adhesive compound, and an additional constituent which is either at least one resin component which is also present in the cured resin impregnated paper, and which is not included in the polymeric adhesive compound, or
an epoxy resin.

A panel suitable for forming a floor covering by assembling a plurality of said panels adjacent to each other, which is of a substantially planar design, having a planar top side and a planar bottom side, said panel being composed from a layered structure that comprises: a waterproof core layer; a top layer adhered on the top side of said core layer,
wherein the top layer comprises at least one ply of cured resin impregnated paper; an adhesive layer between the core layer and the top layer;
characterized in that
the adhesive layer is a cured mixture which comprises a polymeric adhesive compound, and an additional constituent which is either at least one resin component which is also present in the cured resin impregnated paper, and which is not included in the polymeric adhesive compound, or
an epoxy resin.

A fabric includes a fabric body and a backing resin layer laminated on a rear surface of the fabric body. The fabric body includes a fluorine-containing organic compound adhered to at least the surface thereof, and the fluorine-containing organic compound has six carbon atoms and at least one fluorine atom. The backing resin layer contains a resin, a flame retardant, and an organic fluorine based oil repellent in which the carbon number is six.

This invention provides low density gypsum products. This invention also provides a method of making the low density gypsum products.

This invention provides low density gypsum products. This invention also provides a method of making the low density gypsum products.

A veneered element, including a substrate, a wood veneer layer having a first surface and a second surface, the first surface being opposite to the second surface, an adhesive layer adapted to adhere the first surface of the wood veneer layer to a surface of the substrate, wherein adhesive from the adhesive layer is present in a first portion of the wood veneer layer, extending from the first surface of the wood veneer layer into the wood veneer layer, and wherein the second surface of the wood veneer layer is substantially free from adhesive from the adhesive layer. Also, a method of producing such a veneered element).

A sheathing material includes a layer of ceramic paper to help prevent the burning of the sheathing during a fire. The material may include insulation disposed between the ceramic paper and the substrate to further reduce damage to the substrate, and may include a thin layer of wood or paper placed over the ceramic paper to protect the ceramic paper and to allow the sheathing to be used in a manner similar to that of a conventional sheathing material.