The product is produced from a settable aqueous calcium sulphate dispersion which has a water to solids ratio of less than 0.4 to 1, and has distributed therethrough lightweight hollow bodies having water-impervious surfaces (such as expanded polystyrene beads). The dispersion contains a hydratable cement (such as calcium sulpho aluminate) which is capable of hydration in the presence of the calcium sulphate dispersion. The hydratable cement is such that it reacts with excess water in the dispersion thereby enhancing the water resistance of the resulting product.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C04B 28/16 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite
C04B 111/00 - Function, property or use of the mortars, concrete or artificial stone
C04B 111/27 - Water resistance, i.e. waterproof or water-repellent materials
The formulation for making plasterboard with paper cover sheets comprises finely divided gypsum, a minor amount by weight of starch and, as crosslinking agent for the starch, a tri-functional reactive s-triazine having substituents at positions 2, 4 and 6 of the triazine ring which are reactive with the starch. A preferred crosslinking agent is 2,4,6-trichloro-s-triazine, which is preferably partially reacted with the starch before further reaction with the paper cover sheets for the plaster board.
B32B 13/08 - Layered products essentially comprising a water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such substances as the main or only constituent of a layer, next to another layer of a specific substance of paper or cardboard
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
B28B 19/00 - Machines or methods for applying the material to surfaces to form a permanent layer thereon
06 - Common metals and ores; objects made of metal
17 - Rubber and plastic; packing and insulating materials
19 - Non-metallic building materials
Goods & Services
Unwrought and partly wrought metals and alloys thereof;
building materials made wholly or principally of common
metal or alloys thereof; metallic partitioning comprised of
a metal frame with plasterboard lining, the metal
predominating; plates, strips, extrusions and shaped
sections, all of common metal or alloys thereof and for use
in building, screws, nails, fixing devices, clips, bolts,
fasteners, hinges and pivots, metal profiles, metal grids
for ceilings. Insulating materials; materials for stopping and
preparations for sealing joints other than joints in pipes
and tubes; adhesive tapes other than for stationery and not
for medical and household purposes; expansion joint fillers;
washers of rubber or of vulcanised fibre as insulating
material for building; jointing compounds. Non-metallic building materials; plaster and plasterboard;
cement board, building boards; partitioning; coving;
non-metallic ceilings; wall linings; building paper.
4.
Plaster-based material including an agent capable of trapping formaldehyde
The present invention relates to a plaster-based material which includes an agent capable of trapping formaldehyde, in particular a plasterboard intended for the interior fittings of residential buildings.
The agent capable of trapping formaldehyde is chosen from ethylene urea and its derivatives, compounds comprising active methylene(s), sulphites, tannins and their mixtures.
Another subject-matter of the invention is the use of the said material for reducing the amount of formaldehyde present in the atmosphere inside residential buildings.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C04B 111/00 - Function, property or use of the mortars, concrete or artificial stone
5.
Calcium sulphate-based products having enhanced water resistance
A water-resistant calcium sulphate based body comprises a matrix of crystalline calcium sulphate anhydrite, crystals of the matrix being connected to one another by water-resistant phosphate bonding zones, optionally also containing aluminum. The body can be produced by impregnating a porous calcium sulphate with a source of phosphate ions (optionally containing aluminum), and then calcining. Alternatively, a paste comprising calcium sulphate and a source of phosphate ions (optionally containing aluminum) is heated or compressed to form a ‘green body’ and then calcined to produce the body.
C04B 41/50 - Coating or impregnating with inorganic materials
C09C 1/02 - Compounds of alkaline earth metals or magnesium
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C04B 111/27 - Water resistance, i.e. waterproof or water-repellent materials
C04B 28/16 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite
C04B 28/34 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
6.
Lightweight gypsum products having enhanced water resistance
The product is produced from a settable aqueous calcium sulphate dispersion which has a water to solids ratio of less than 0.4 to 1, and has distributed therethrough lightweight hollow bodies having water-impervious surfaces (such as expanded polystyrene beads). The dispersion contains a hydratable cement (such as calcium sulpho aluminate) which is capable of hydration in the presence of the calcium sulphate dispersion. The hydratable cement is such that it reacts with excess water in the dispersion thereby enhancing the water resistance of the resulting product.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C04B 28/16 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite
C04B 111/00 - Function, property or use of the mortars, concrete or artificial stone
C04B 111/27 - Water resistance, i.e. waterproof or water-repellent materials
A laminated acoustic building panel comprises a pair of plasterboard substrates which are bonded together by an adhesive layer, the panel having a dynamic Young's modulus of 0.1 to 5 GPa and a damping loss factor of 5-30% (η=0.05-0.3), and the ratio of the adhesive to the applied surface area of the substrates being 80-250 g/m2. The laminated panel is relatively soft in construction and hence sound waves caused by knocking or impact noise is surprisingly damped using considerably less adhesive than known panels. The use of soft substrates and less adhesive significantly reduces the weight of the panel. Furthermore, the use of less adhesive significantly reduces costs and makes production easier.
E04B 1/82 - Heat, sound or noise insulation, absorption, or reflectionOther building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
E04B 2/02 - Walls, e.g. partitions, for buildingsWall construction with regard to insulationConnections specially adapted to walls built-up from layers of building elements
E04B 9/00 - CeilingsConstruction of ceilings, e.g. false ceilingsCeiling construction with regard to insulation
The formulation for making plasterboard with paper cover sheets comprises finely divided gypsum, a minor amount by weight of starch and, as crosslinking agent for the starch, a tri-functional reactive s-triazine having substituents at positions 2, 4 and 6 of the triazine ring which are reactive with the starch. A preferred crosslinking agent is 2,4,6-trichloro-s-triazine, which is preferably partially reacted with the starch before further reaction with the paper cover sheets for the plaster board.
B32B 23/04 - Layered products essentially comprising cellulosic plastic substances comprising such substance as the main or only constituent of a layer, next to another layer of a specific substance
B32B 29/00 - Layered products essentially comprising paper or cardboard
C08B 31/00 - Preparation of chemical derivatives of starch
C08J 3/24 - Crosslinking, e.g. vulcanising, of macromolecules
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C08L 3/02 - StarchDegradation products thereof, e.g. dextrin
C04B 111/00 - Function, property or use of the mortars, concrete or artificial stone
9.
Process for reducing the set time of a settable slurry
A process for reducing the set time a plaster slurry. The process comprises the steps of, providing a pre-determined amount of water, providing a pre-determined amount of the plaster, mixing the water and the plaster together at a first time to form a slurry, and, re-directing a portion of the slurry formed at the first time to combine with slurry formed at a second time.
B28C 5/00 - Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
B28C 5/46 - Arrangements for applying super- or sub-atmospheric pressure during mixingArrangements for cooling or heating during mixing
B28C 7/00 - Controlling the operation of apparatus for producing mixtures of clay or cement with other substancesSupplying or proportioning the ingredients for mixing clay or cement with other substancesDischarging the mixture
C04B 14/00 - Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stoneTreatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
C04B 16/00 - Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stoneTreatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
C04B 24/00 - Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
C04B 28/10 - Lime cements or magnesium oxide cements
C04B 7/38 - Preparing or treating the raw materials individually or as batches
The product is produced from a settable aqueous calcium sulphate dispersion which has a water to solids ratio of less than 0.4 to 1, and has distributed therethrough lightweight hollow bodies having water-impervious surfaces (such as expanded polystyrene beads). The dispersion contains a hydratable cement (such as calcium sulpho aluminate) which is capable of hydration in the presence of the calcium sulphate dispersion. The hydratable cement is such that it reacts with excess water in the dispersion thereby enhancing the water resistance of the resulting product.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C04B 28/16 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite
11.
LIGHTWEIGHT GYPSUM PRODUCTS HAVING ENHANCED WATER RESISTANCE
The product is produced from a settable aqueous calcium sulphate dispersion which has a water to solids ratio of less than 0.4 to 1, and has distributed therethrough lightweight hollow bodies having water-impervious surfaces (such as expanded polystyrene beads). The dispersion contains a hydratable cement (such as calcium sulpho aluminate) which is capable of hydration in the presence of the calcium sulphate dispersion. The hydratable cement is such that it reacts with excess water in the dispersion thereby enhancing the water resistance of the resulting product.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C04B 28/16 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite
12.
Plaster-based material including an agent capable of trapping formaldehyde
The present invention relates to a plaster-based material which includes an agent capable of trapping formaldehyde, in particular a plasterboard intended for the interior fittings of residential buildings.
The agent capable of trapping formaldehyde is chosen from ethylene urea and its derivatives, compounds comprising active methylene(s), sulphites, tannins and their mixtures.
Another subject-matter of the invention is the use of the said material for reducing the amount of formaldehyde present in the atmosphere inside residential buildings.
The present invention relates to a plaster-based material which includes an agent capable of trapping formaldehyde, in particular a plasterboard intended for the interior fittings of residential buildings. The agent capable of trapping formaldehyde is chosen from ethylene urea and its derivatives, compounds comprising active methylene(s), sulphites, tannins and their mixtures. Another subject-matter of the invention is the use of the said material for reducing the amount of formaldehyde present in the atmosphere inside residential buildings.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
14.
PLASTER-BASED MATERIAL INCLUDING AN AGENT CAPABLE OF TRAPPING FORMALDEHYDE
The present invention relates to a plaster-based material which includes an agent capable of trapping formaldehyde, in particular a plasterboard intended for the interior fittings of residential buildings. The agent capable of trapping formaldehyde is chosen from ethylene urea and its derivatives, compounds comprising active methylene(s), sulphites, tannins and their mixtures. Another subject-matter of the invention is the use of the said material for reducing the amount of formaldehyde present in the atmosphere inside residential buildings.
B01J 20/22 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising organic material
C09C 1/02 - Compounds of alkaline earth metals or magnesium
E04C 2/02 - Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
E04F 13/00 - Coverings or linings, e.g. for walls or ceilings
15.
CALCIUM SULPHATE-BASED PRODUCTS HAVING ENHANCED WATER RESISTANCE
A water-resistant calcium sulphate based body comprises a matrix of crystalline calcium sulphate anhydrite, crystals of the matrix being connected to one another by water-resistant phosphate bonding zones, optionally also containing aluminium. The body can be produced by impregnating a porous calcium sulphate with a source of phosphate ions (optionally containing aluminium), and then calcining. Alternatively, a paste comprising calcium sulphate and a source of phosphate ions (optionally containing aluminium) is heated or compressed to form a 'green body' and then calcined to produce the body.
C04B 28/16 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite
C04B 28/34 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
C04B 41/50 - Coating or impregnating with inorganic materials
A method of producing gypsum building board, in which there is added to an aqueous gypsum slurry a water swellable clay and a water-soluble basic polymer having preferential affinity for clay, the slurry being allowed to set so as to form a board, the water-soluble basic polymer consisting essentially of carbon, nitrogen and hydrogen and having a mine groups (which may be primary, secondary, tertiary or quaternary) in the polymer backbone and/or in side chains thereof.
C04B 24/26 - Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
C04B 24/28 - Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
17.
CALCIUM SULPHATE-BASED PRODUCTS HAVING ENHANCED WATER RESISTANCE
A water-resistant calcium sulphate based body comprises a matrix of crystalline calcium sulphate anhydrite, crystals of the matrix being connected to one another by water-resistant phosphate bonding zones, optionally also containing aluminium. The body can be produced by impregnating a porous calcium sulphate with a source of phosphate ions (optionally containing aluminium), and then calcining. Alternatively, a paste comprising calcium sulphate and a source of phosphate ions (optionally containing aluminium) is heated or compressed to form a 'green body' and then calcined to produce the body.
C04B 28/16 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite
C04B 28/34 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
C04B 41/50 - Coating or impregnating with inorganic materials
A laminated acoustic building panel comprises a pair of plasterboard substrates (10,13) which are bonded together by an adhesive layer (16), the panel having a dynamic Young's modulus of 0.1 to 5 GPa and a damping loss factor of 5 - 30% (q = 0.05 - 0.3), and the ratio of the adhesive (16) to the applied surface area of the substrates (10,13) being 80 - 250 g/m2. The laminated panel is relatively soft in construction and hence sound waves caused by knocking or impact noise is surprisingly damped using considerably less adhesive (16) than known panels. The use of soft substrates (10,13) and less adhesive (16) significantly reduces the weight of the panel. Furthermore, the use of less adhesive (16) significantly reduces costs and makes production easier.
A laminated acoustic building panel comprises a pair of plasterboard substrates (10,13) which are bonded together by an adhesive layer (16), the panel having a dynamic Young's modulus of 0.1 to 5 GPa and a damping loss factor of 5 - 30% (η = 0.05 - 0.3), and the ratio of the adhesive (16) to the applied surface area of the substrates (10,13) being 80 - 250 g/m2. The laminated panel is relatively soft in construction and hence sound waves caused by knocking or impact noise is surprisingly damped using considerably less adhesive (16) than known panels. The use of soft substrates (10,13) and less adhesive (16) significantly reduces the weight of the panel. Furthermore, the use of less adhesive (16) significantly reduces costs and makes production easier.
A coating method for gypsum board comprising forming a gypsum board entrained with polymer additive in a surface layer, applying a preferably acrylic primary coating, curling and drying, and passing the gypsum board through a first roll coater wherein a second fluid coating is deposited over the primary layer, which forms a chemical bond with the entrained polymer, and a chemical bond with the second fluid coating. A coating material which can form copolymer bonds with the second coating is then deposited on the same, then dried and cured, resulting in coated gypsum board having a low surface tension surface, essentially impermeable to water, vapor or moisture penetration. In another aspect, at least one polymer additive entrained in a surface layer of the gypsum board and capable of forming a copolymer bond with a second coating is applied either on-line or off-line from the gypsum board formation line.
B32B 13/00 - Layered products essentially comprising a water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
B32B 1/04 - Layered products essentially having a general shape other than plane characterised by feature of form at particular places, e.g. in edge regions
The invention relates to a plate which is a complex comprising a rigid medium (2) coated with a luminous fabric (4). The rigid medium (2) has a front surface (6), a rear surface (8), a first edge (10) and a second edge (12) opposite the first edge. The luminous fabric (4) at least partially covers the front surface (6) extending from the first edge (10) to the second edge (12) and comprises optical fibres (14) extending across the front surface (6) of the rigid medium (2) substantially perpendicular to the first edge (10) and the second edge (12). The first ends of the optical fibres (14) are folded around the first edge (10) towards the rear surface (8) of the rigid medium (2), and clamping means (26) are provided on the first edge (10) forming a clamp that clasps the folded sections of the optical fibres (14) and the first edge (10) of the rigid medium (2).
F21V 33/00 - Structural combinations of lighting devices with other articles, not otherwise provided for
D03D 15/00 - Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
E04B 2/74 - Removable non-load-bearing partitionsPartitions with a free upper edge
G02B 6/00 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings
This partition comprises a first facing (4) coated with a luminous fabric (6) lying in an approximately vertical plane and having a front face that receives the luminous fabric (6), a rear face opposite the front face, a lower edge and an upper edge. The luminous fabric (6) comprises optical fibres (8) lying substantially vertically on the front face of the first facing (4) and the first ends of which are folded around the lower edge of the first facing (4) towards its rear face. A module (8) houses light sources and has connection means (10) for the ends of the optical fibres (8) of the luminous fabric (6) that are folded around the lower edge of the first facing (4). The first module (8) is fastened to the first facing (4) and is supported by feet (20) extending beyond the lower edge of the first facing (4).
Gypsum based formulations The formulation for making plasterboard with paper cover sheets comprises finely divided gypsum, a minor amount by weight of starch and, as crosslinking agent for the starch, a tri-functional reactive s-triazine having substituents at positions 2, 4 and 6 of the triazine ring which are reactive with the starch. A preferred crosslinking agent is 2,4,6-trichloro–s-triazine, which is preferably partially reacted with the starch before further reaction with the paper cover sheets for the plaster board..
C08B 31/00 - Preparation of chemical derivatives of starch
C08L 3/02 - StarchDegradation products thereof, e.g. dextrin
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
Gypsum based formulations The formulation for making plasterboard with paper cover sheets comprises finely divided gypsum, a minor amount by weight of starch and, as crosslinking agent for the starch, a tri-functional reactive s-triazine having substituents at positions 2, 4 and 6 of the triazine ring which are reactive with the starch. A preferred crosslinking agent is 2,4,6-trichloro-s-triazine, which is preferably partially reacted with the starch before further reaction with the paper cover sheets for the plaster board..
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C08B 31/00 - Preparation of chemical derivatives of starch
C08L 3/02 - StarchDegradation products thereof, e.g. dextrin
where: R represents a linear or branched alkyl group having from 6 to 20 carbon atoms; G represents a reducing saccharide moiety connected to R via an ethereal O-glycosidical bond; and x is 1 to 10.
A process for reducing the set time a plaster slurry. The process comprises the steps of, providing a pre-determined amount of water, providing a pre-determined amount of the plaster, mixing the water and the plaster together at a first time to form a slurry, and, re-directing a portion of the slurry formed at the first time to combine with slurry formed at a second time.
06 - Common metals and ores; objects made of metal
17 - Rubber and plastic; packing and insulating materials
19 - Non-metallic building materials
Goods & Services
Unwrought and partly wrought metals and alloys thereof; building materials made wholly or principally of common metal or alloys thereof; metallic partitioning comprised of a metal frame with plasterboard lining, the metal predominating; plates, strips, extrusions and shaped section, all of common metal or alloys thereof and for use in building; screws, nails, fixing devices, clips, bolts, fasteners, hinges and pivots. Insulating materials; materials for stopping and preparations for sealing joints; adhesive tapes other than for stationery and not for medical and household purposes; expansion joint fillers; washers of rubber or vulcanised fibre. Non-metallic building materials; plaster and plasterboard; jointing compounds; building boards; building laths; partitioning; coving, non-metallic ceilings; wall linings; building paper.
A gypsum formulation, typically for producing a gypsum building board, is produced by adding to an aqueous gypsum slurry containing a water swellable clay, acomb- based copolymer fluidiser and a basic water-soluble polymer having preferential affinity for clay, and allowing a layer of theaqueous gypsum slurry to set.
C04B 24/26 - Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
06 - Common metals and ores; objects made of metal
19 - Non-metallic building materials
37 - Construction and mining; installation and repair services
Goods & Services
Common metals and their alloys; metal building materials; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery, small items of metal hardware; pipes and tubes of metal; safes; goods of common metal not included in other classes; ores. Building materials (non-metallic); non-metallic rigid pipes for building; asphalt, pitch and bitumen; non-metallic transportable buildings; monuments, not of metal. Building construction; repair; installation services.
A gypsum stucco composition comprising the following components finely divided; calcium sulphate hemihydrate in calcined solid beta crystalline form; and in intimate mixture with said finely divided calcium sulphate hemihydrate and mixed therewith no later than calcination to form the hemihydrate, a sulphate salt comprising at least one of ammonium sulphate and aluminium sulphate, in an amount such that when the stucco composition is mixed with water and allowed to set, the resulting set plaster has increased compressive strength, flexural strength and/or E-modulus compared to a set plaster produced from said finely divided calcium sulphate hemihydrate containing no said sulphate salt.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C04B 11/024 - Ingredients added before, or during, the calcining process, e.g. calcination modifiers
A method of producing gypsum building board, comprises allowing a layer of an aqueous gypsum slurry to set so as to form a board, in which the improvement comprises mixing the gypsum slurry with an aqueous foam produced by foaming water containing at least one non-ionic alkylpolysaccharide foaming agent of the general formula (I) R--O--(G)xwhere: R represents a linear or branched alkyl group having from 6 to 20 carbon atoms; G represents a reducing saccharide moiety connected to R via an ethereal O-glycosidical bond; and x is 1 to 10.
C04B 24/38 - Polysaccharides or derivatives thereof
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C04B 38/10 - Porous mortars, concrete, artificial stone or ceramic warePreparation thereof by using foaming agents
A method of producing gypsum building board, comprises allowing a layer of an aqueous gypsum slurry to set so as to form a board, in which the improvement comprises mixing the gypsum slurry with an aqueous foam produced by foaming water containing at least one non-ionic alkylpolysaccharide foaming agent of the general formula (I) R--O--(G)xwhere: R represents a linear or branched alkyl group having from 6 to 20 carbon atoms; G represents a reducing saccharide moiety connected to R via an ethereal O-glycosidical bond; and x is 1 to 10.
C04B 24/38 - Polysaccharides or derivatives thereof
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C04B 38/10 - Porous mortars, concrete, artificial stone or ceramic warePreparation thereof by using foaming agents
35.
Gypsum based panel and method for making gypsum based panel
A method of forming a gypsum-based panel product including the steps of: mixing calcined gypsum, water, a foaming agent and a core strengthening agent to form a foamed slurry; depositing the slurry; shaping the slurry to form a board having a core and core surfaces, optionally sandwiched between sheets of liner; and allowing the core to set, and drying the board, wherein the strengthening agent is dextrin, used in an amount not less than 0.1% by weight, based on the amount of calcined gypsum, so that, after drying, there is provided a strengthening dispersion of dextrin throughout the core. Less than 5% dextrin in preferred.
B29C 65/00 - Joining of preformed partsApparatus therefor
B32B 13/00 - Layered products essentially comprising a water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
B32B 37/00 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
B32B 23/04 - Layered products essentially comprising cellulosic plastic substances comprising such substance as the main or only constituent of a layer, next to another layer of a specific substance
B32B 29/00 - Layered products essentially comprising paper or cardboard
06 - Common metals and ores; objects made of metal
17 - Rubber and plastic; packing and insulating materials
19 - Non-metallic building materials
Goods & Services
Unwrought and partly wrought metals and alloys thereof; building materials made wholly or principally of common metal or alloys thereof; metallic partitioning comprised of a metal frame with plasterboard lining, the metal predominating; plates, strips, extrusions and shaped sections, all of common metal or alloys thereof and for use in building, screws, nails, fixing devices, clips, bolts, fasteners, hinges and pivots. Insulating materials; materials for stopping and preparations for sealing joints other than joints in pipes and tubes; adhesive tapes other than for stationery and not for medical and household purposes; expansion joint filler; washers of rubber or of vulcanised fibre as insulating material for building, expressly excluding flexible tubes and preparations for sealing thereof. Non-metallic building materials; plaster and plasterboard; jointing compounds; building boards; building laths; partitioning; coving; non-metallic ceilings; wall linings; building paper.
06 - Common metals and ores; objects made of metal
19 - Non-metallic building materials
37 - Construction and mining; installation and repair services
Goods & Services
Unwrought and partly wrought metals and alloys thereof; building materials made wholly or principally of common metal or alloys thereof; metallic partitioning comprised of a metal frame with plasterboard lining, the metal predominating; plates, strips, extrusions and shaped section, all of common metal or alloys thereof and for use in building; screws, nails, fixing devices, clips, bolts, fasteners, hinges and pivots. Plaster and plasterboard; building boards; building lathes; partitioning; coving; non-metallic ceilings; wall linings; building paper. Building construction services; repair and installation services; advisory and consultancy services relating to the aforesaid.
06 - Common metals and ores; objects made of metal
17 - Rubber and plastic; packing and insulating materials
19 - Non-metallic building materials
37 - Construction and mining; installation and repair services
Goods & Services
Unwrought or partly wrought common metals and alloys of common metals; metallic partitioning comprised of metal frame with plasterboard lining, the metal predominating; plates, strips, extrusions and shaped sections, all of common metal or alloys thereof and for use in building; screws, nails, clips, bolts, fasteners, hinges, pivots. Insulating materials, sound insulation and sound absorption materials; packing, stopping and filling materials; preparations for sealing joints; expansion joints fillers; adhesive tapes other than for stationery and not for medical and household purposes. Non-metallic building materials; plaster and plasterboard; building boards, ceiling tiles; non-metallic ceilings, wall boards; non-metallic wall claddings, wall linings and wall tiles, building laths, partitioning; coving; jointing compounds. Building construction; repair; installation services.
17 - Rubber and plastic; packing and insulating materials
19 - Non-metallic building materials
Goods & Services
Insulating materials, sound insulation and sound absorption materials; packing, stopping and filling materials; preparations for sealing joints; expansion joint fillers; adhesive tapes other than for stationery and not for medical and household purposes. Non-metallic building materials; plaster and plasterboard; building boards, ceiling tiles; non-metallic ceilings, wall boards; non-metallic wall claddings, wall linings and wall tiles, building laths; partitioning; coving; jointing compounds.
Gypsum plasterboard is produced by combining calcium sulphate hemihydrate (stucco) with water to form an aqueous slurry. Uncalcined gypsum having a specific surface area below 0.3 m2/g is added to the slurry and the slurry is discharged onto a support so as to form a sheet of gypsum plasterboard.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
17 - Rubber and plastic; packing and insulating materials
19 - Non-metallic building materials
Goods & Services
Insulating materials; sound insulation and sound absorption materials; packing, stopping and filling materials; preparations for sealing joints; expansion joint fillers; adhesive tapes other than for stationery and not for medical and household purposes. Non-metallic building materials; plaster and plasterboard; building boards; ceiling tiles; non-metallic ceilings; wallboards; non-metallic wall claddings, wall linings and wall tiles; building laths; partitioning; coving; jointing compounds.
