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Hemihydrate

Hemihydrate-related patent applications - as published by the U.S. Patent and Trademark Office (USPTO).


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Liquid gypsum set accelerator
National Gypsum Properties, Llc
January 11, 2018 - N°20180009713

A liquid accelerator composition for accelerating the setting reaction of calcium sulfate hemihydrate and water and methods of forming a liquid gypsum accelerator are provided. The liquid accelerator composition includes a liquid media in which calcium sulfate dihydrate is less than fully soluble and a ground product of a mill grinding of a mixture comprising calcium sulfate dihydrate.
Bioactive composites with function of radiopacity
Montjade Engineering Co., Ltd.
January 04, 2018 - N°20180002483

A bioactive composite includes 10% to 40% by weight of calcium sulfate (caso4), 10% to 20% by weight of tantalum pentoxide (ta2o5), and 40% to 80% of polyetheretherketone (peek). Calcium sulfate is anhydrous calcium made by removing crystallization water of beta calcium sulfate hemihydrate.
Pourable compositions
United States Gypsum Company
December 07, 2017 - N°20170349492

The invention provides a pourable composition comprising calcium sulfate hemihydrate; optionally, cement; one or more anionic surfactants selected from alkyl anionic surfactants, alkyl ether anionic surfactants, alkyl aryl anionic surfactants, and combinations thereof; one or more set accelerator additives; and water.
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Gypsum cement composition and articles formed thereof
United States Gypsum Company
November 09, 2017 - N°20170320780

A composition for forming moulded mantels, columns and other decorative enhancement to fireplace openings is formed of a mixture of alpha hemihydrate gypsum plaster, cement, filler and milled fiber. By using this composition with water and acrylic binder a mixture is formed which sets and gains strength quickly and is an ideal material for manufacturing architectural and decorative structures. Advantageously, ...
Method of producing gypsum binder
United States Gypsum Company
September 07, 2017 - N°20170253525

A method of producing a gypsum binder, the method including dehydrating of gypsum raw material lumps by heating in a gaseous medium with further drying, cooling, and milling stages, wherein the heating gypsum raw material lumps is performed either by: (i) placing the lumps in a heating medium set to a temperature exceeding the temperature under which dehydration and formation ...
Method for preparing a-calcium sulfate hemihydrate with calcium sulfate dihydrate
Shandong Borui New Material Technology Co., Ltd
August 31, 2017 - N°20170247262

A method for preparing α-calcium sulfate hemihydrate with calcium sulfate dihydrate includes steps of: uniformly mixing the calcium sulfate dihydrate with an additive solution, and obtaining a mixture, wherein weight percentages of the calcium sulfate dihydrate and the additive solution in the mixture are respectively 90. 00-95. 00% and 5. 00-10. 00%, and the additive solution contains water, inorganic salt, organic salt, ...
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Crystalline form of pemirolast
Rspr Pharma Ab
July 20, 2017 - N°20170202839

There is provided a hemihydrate form of the sodium salt of pemirolast.
Method for producing porous calcium deficient hydroxyapatite granules
Bioventus, Llc
July 13, 2017 - N°20170197833

The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (csa), calcium sulfate dihydrate (csd) or calcium sulfate hemihydrate (csh) to an incubation in an alkaline aqueous solution having a ph-value of less than 10 and containing po43− ions; whereby the granules of calcium sulfate anhydrous (csa), calcium ...
Freeze-thaw durable geopolymer compositions and methods for making same
United States Gypsum Company
June 15, 2017 - N°20170166481

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component ...
Method for producing porous calcium deficient hydroxyapatite granules
Mathys Ag Bettlach
June 08, 2017 - N°20170158510

The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (csa), calcium sulfate dihydrate (csd) or calcium sulfate hemihydrate (csh), the granules comprising interconnected pores with a minimum mean diameter of 3 microns, to a first incubation in an alkaline aqueous solution having a ph-value of less than 10 and ...
Freeze-thaw durable geopolymer compositions and methods for making same
United States Gypsum Company
April 27, 2017 - N°20170113969

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component ...
High strength synthetic bone for bone replacement for increasing ompressive strength and facilitating blood circulation, ...
Ossein Co., Ltd.
March 09, 2017 - N°20170065740

The present invention relates to a high strength synthetic bone for bone replacement for increasing compressive strength and facilitating blood circulation, and a manufacturing method therefor, and provides the high strength synthetic bone for bone replacement in which calcium sulfate hemihydrate (csh) and nacl, in a particle state, penetrate into the pores of a porous inorganic material such as ...
Quick-drying building material composition based on a mineral hybrid binder
Sika Technology Ag
February 02, 2017 - N°20170029333

A quick-drying gypsum composition, in particular for use as gypsum filling compound and for the production of floor coverings, wherein the gypsum composition contains 20 to 70% of a mixture of calcium aluminate and calcium sulfate hemihydrate and/or anhydrite and/or calcium sulfate dihydrate as hydraulic binders and 30 to 80% by weight of fillers, and wherein the weight ratio of calcium aluminate ...
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Coated building panels and articles containing calcium sulfate hemihydrate
United States Gypsum Company
December 08, 2016 - N°20160355438

A method of finishing an interior wall includes the steps of preparing a substrate of building panels comprising gypsum, cement or combinations thereof, said substrate having a surface, followed by applying a coating to the substrate, said coating comprising 1-30% by weight of a latex emulsion binder, 30-80% by weight calcium sulfate hemihydrate, up to about 8% by weight of a ...
Multiphasic bone graft substitute material
Agnovos Healthcare, Llc
December 08, 2016 - N°20160354514

The invention provides a particulate composition adapted for forming a bone graft substitute cement upon mixing with an aqueous solution, comprising i) a calcium sulfate hemihydrate powder, wherein the calcium sulfate hemihydrate is present at a concentration of at least about 50 weight percent based on the total weight of the particulate composition; ii) a monocalcium phosphate monohydrate powder; iii) a ...
Cementitious patch compositions and methods
United States Gypsum Company
November 24, 2016 - N°20160340251

A cementitious hydrating patch composition is provided with improved strength and abrasion resistance. The patch comprises portland cement in the amount from 2% to 10%, calcium sulfate hemihydrate in the amount from 2% to 30%, gypsum in the amount from 0% to 15%, calcium aluminate cement in the amount from 15% to 40%, calcium carbonate in the amount from 0% to 40%, at least one filler in the amount from 1% ...
Method of curing a gypsum calcination product
Saint-gobain Placo Sas
November 24, 2016 - N°20160340244

A method of conditioning stucco comprises the steps of supplying a quantity of stucco particles to a reaction vessel, the stucco particles comprising calcium sulphate hemihydrate and/or calcium sulphate anhydrite, as well as calcium sulphate dihydrate; and conditioning the stucco particles at a temperature of at least 100° c. And a humidity of at least 70%. During the step of ...
Multiphasic bone graft substitute
Wright Medical Technology, Inc.
October 20, 2016 - N°20160303276

The invention provides a particulate composition adapted for forming a bone graft substitute cement upon mixing with an aqueous solution, comprising i) a calcium sulfate hemihydrate powder, wherein the calcium sulfate hemihydrate is present at a concentration of at least about 50 weight percent based on the total weight of the particulate composition; ii) a monocalcium phosphate monohydrate powder; iii) a ...
Crystalline form of pemirolast
Rspr Pharma Ab
September 01, 2016 - N°20160250217

There is provided a hemihydrate form of the sodium salt of pemirolast.
Struvite-k and syngenite composition for use in building materials
Certainteed Gypsum, Inc.
August 18, 2016 - N°20160236979

A composition and process for manufacture thereof used in hybrid inventive building materials comprising syngenite (k2ca(so4)2. H2o) and struvite-k (kmgpo4. 6h2o). Starting constituents include magnesium oxide (mgo), monopotassium phosphate (mkp) and stucco (calcium sulfate hemihydrate), mixed in predetermined ratios, cause reactions to proceed through multiple phases, which reactions variously are proceeding simultaneously and in parallel. Variables, ...
Microwave heating for gypsum manufacturing processes
Georgia-pacific Gypsum Llc
May 05, 2016 - N°20160122197

Methods of making calcium sulfate whiskers are provided. In one aspect, a method includes autoclaving a slurry of calcium sulfate hemihydrate and water to form calcium sulfate hemihydrate whiskers in water and microwaving the whiskers to dewater them, wherein the microwaving is effective to prevent a majority of the whiskers from reverting to a dihydrate form. In one aspect, a ...
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