Class 156/41 - With water-proofing with added material

Subclass of Class 156 - Adhesive bonding and miscellaneous chemical manufacture
Definition: Processes which include the step of coating a facing sheet
No. of patents: 30
Last issue date: 10/14/2008

Number	Title	Issue Date
7435369	Method for targeted delivery of additives to varying layers in gypsum panels A method of manufacture of multilayer gypsum board, and a gypsum additive delivery system, including wet gypsum board passing through a board forming station in which additives are delivered to one or more layers of a multi layered gypsum board panels, such as engin...	10/14/2008
7413603	Fiberboard with improved water resistance Articles, including fiberboard, are made from a pumpable, flowable slurry including alpha-calcined calcium sulfate hemihydrate anchored in pores of host particles, alpha-calcined calcium sulfate hemihydrate, a silicone compound, magnesium oxide, and water. The magne...	08/19/2008
7208225	Prefabricated plaster board The present invention provides a construction assembly for interior works, comprising: prefabricated elements, preferably flat prefabricated elements e.g. gypsum fiberboards, cement fiberboards, gypsum wall boards or plaster boards...	04/24/2007
7172403	Apparatus for preparing a gypsum wallboard core A gypsum wallboard core, and methods and apparatus for making the same are disclosed. Methods of making a gypsum wallboard core include extruding a gypsum slurry containing water, gypsum, slip agents, water-reducing agents, surfactants and, optional additives, throu...	02/06/2007
7155866	Cementitious exterior sheathing product having improved interlaminar bond strength The present invention provides exterior building products, such as roofing and siding, shake, shingles, siding, sheathing, panels, planks, vertical siding, soffit panels, fencing, decking, fascia, corner posts, column corners and trim boards in which a plurality of ...	01/02/2007
7101138	Extractor/buffer An automated material handling system that includes an extractor/buffer apparatus capable of simultaneously accessing multiple Work-In-Process (WIP) parts, thereby providing a highly efficient interface between WIP storage locations and transport equipment. The extr...	09/05/2006
6907708	Lightweight wall construction A low or no fines lightweight concrete mixture. The mixture comprises one part by volume of a cementitious binder, 2-10 parts inert coarse aggregate, a cement additive in an amount of 0.05 to 0.3% by weight of the cementitious binder and an effective amount of water...	06/21/2005
6878321	Method of manufacture of glass reinforced gypsum board and apparatus therefor Gypsum board having inorganic fiber, preferably glass fiber, preferably glass fiber, includes providing face sheets which have been completely impregnated with a gypsum slurry so as to penetrate through said random interstices between the inorganic fibers and to the...	04/12/2005
6569541	Plaster-based prefabricated structural element exhibiting water resistance A water-resistant prefabricated structural element comprising a substrate based on cured plaster, said substrate being able to be obtained by at least the following steps: (a) homogeneously mixing a dry material, comprising mostly at least one hydratable ...	05/27/2003
6547901	Reinforced plasterboard A reinforced plasterboard has a first layer of paper, a core of a cementitious material, a mesh reinforcement and adjacent to that mesh reinforcement a further layer of paper. The mesh may be in contact with the paper layer....	04/15/2003
6165261	Water-resistant gypsum composition The present invention relates to water-resistant gypsum compositions, methods of making such composition, as well as manufacturing methods and products comprising such compositions....	12/26/2000
6106607	Composition for hydrophobing gypsum and methods for the preparation and use thereof A water repellent composition for gypsum containing masonry materials is disclosed. The composition contains as organohydrogensiloxane and polyvinyl alcohol, the combination of which provides unexpectedly high water repellency....	08/22/2000
5695553	Wax-based emulsions and their use in gypsum products A composition suitable for use in making water-resistant gypsum products is provided. The composition is an aqueous emulsion comprising water, a paraffinic hydrocarbon wax, a Montan wax, an alkali metal or ammonium hydroxide in an amount sufficient to at ...	12/09/1997
5618627	Water-repellent wallboard The present invention provides a novel method of rendering a wallboard water-repellent comprising applying to the wallboard a water-repellent composition comprising a hydrogen siloxane component and a high molecular weight silicone....	04/08/1997
5520779	Process and apparatus for producing fiber-reinforced plaster plates Process and apparatus for the continuous production of gypsum fiber plates in which the fiber component is dewatered and rediluted with water recovered from the gypsum-fiber suspension after it has been spread on a belt, passed over at least two suction b...	05/28/1996
5437722	Water-resistant gypsum compositions and emulsion for making same The water resistance of gypsum compositions, such as those used in gypsum wallboard, is improved by incorporating in the compositions an aqueous emulsion containing a paraffinic hydrocarbon having a melting point of 40° to 80° C., montan wax and polyvin...	08/01/1995
5264057	Process for the production of a flame resistant to nonflammable composite panel and apparatus for carrying out the process A flame resistant to nonflammable composite panel is produced from a nonextrudable core mixture with a pourable, nonflammable filling material and a binder, and on both sides cover strips flexibly bonded to the core. For a continuous production of the com...	11/23/1993
5256222	Lightweight building material board A lightweight wallboard having a density in the range of 10 pcf to 30 pcf and comprised of a faced layer of expanded siliceous inorganic particles, such as expanded perlite, bonded together by inorganic binder, such as sodium silicate. The board is made b...	10/26/1993
5135805	Method of manufacturing a water-resistant gypsum composition A method for incorporating siloxane into a water-resistant, gypsum-based article is disclosed, comprising, (A) adding said siloxane to water; (B) mixing said siloxane/water mixture with calcined gypsum to form an aqueous slurry; and (C) allowing said slur...	08/04/1992
4948647	Gypsum backer board A backer board for use as a base to which ceramic tile is bonded for a bathtub or shower area, in which the board is made by forming a gypsum core board with fiber glass laminated composite facings, which include an inner fiber glass scrim, an outer fiber...	08/14/1990
4810569	Fibrous mat-faced gypsum board An exterior finishing system for a building. including particularly an exterior insulation system, which includes a fibrous mat-faced gypsum board, preferably a board in which the set gypsum core thereof is water resistant, and preferably one in which the...	03/07/1989
4643771	Production of water-repellent moldings from plaster A water-repellent plaster molding is produced by forming a foam of water, surfactant and polyalkyl-hydrogen-siloxane adding this foam to a paste of plaster powder in water, and letting the mixture set....	02/17/1987
4533434	Process for sizing paper and process for making plasterboard base paper sized thereby An improved sizing is feasible by adding into a papermaking pulp slurry an aqueous dispersion prepared by mixing an aqueous solution of an ampholytic acrylamide polymer having both cationic and anionic groups with a liquid substituted succinic anhydride o...	08/06/1985
4518652	Method for forming a lightweight cementitious structural product and product formed thereby A method for producing a lightweight set cementitious product, and more specifically, gypsum wallboard, having excellent strength and paper-to-core bond, which method comprises producing a foam comprising polyvinyl alcohol and water, introducing the foam ...	05/21/1985
4470877	Paper having calcium sulfate mineral filler for use in the production of gypsum wallboard A composite paper particularly adapted for use as cover sheets in the production of gypsum wallboard, the paper being sufficiently porous to permit better drainage and more rapid drying in the production of the paper, and when applied to the surfaces of a...	09/11/1984
4447498	Use of organopolysiloxanes in the manufacture of paper-coated plaster boards Use of an organopolysiloxane having the formula ##STR1## in which R1 is an alkyl or aryl radical, at least 80% of the R1 radicals being alkyl radicals, R2 is an alkyl radical or the R4 Z radical, at least 2/3 of...	05/08/1984
4421704	Method of treatment for plaster articles to improve wear and water resistance and article of manufacture A method of surface treatment for plaster articles to improve wear and water resistance is disclosed. The method includes the step of forming the article, allowing the article to set, drying to remove excess water, applying a coat of substantially molten ...	12/20/1983
4406738	Use of an organopolysiloxane preparation for the treatment of paper for the production of plaster boards An organopolysiloxane suitable for use in treating paper to be used in plaster boards. The organopolysiloxane is obtained by reacting a polysiloxanol of the formula ##STR1## in which R1 is a methyl or a phenyl radical, at least 90% of the ...	09/27/1983
4336294	Coated boards of wooden material in particular for use in furniture A wooden board for use for example as a table top has a moisture-proof coating on its upper surface and an edging of synthetic material which is sprayed under pressure on to the cut edge surface of the board. The edging overlaps the adjacent edge of the u...	06/22/1982
3935021	Water-resistant gypsum products The water resistance of gypsum products, such as gypsum wallboard, is improved by incorporating in the composition from which the gypsum product is made polyvinyl alcohol and wax-asphalt emulsion....	01/27/1976

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Class 156/41 - With water-proofing with added material