| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Plaster composition | US29390063 | 1963-07-09 | US3305375A | 1967-02-21 | JAKACKI EDWIN J |
| 22 | Wall plaster | US9479826 | 1926-03-15 | US1608148A | 1926-11-23 | WALPER CURRY O |
| 23 | Lower heat processed calcium sulphates for early strength cements and general use | US14768759 | 2014-02-18 | US09611172B2 | 2017-04-04 | Mustafa Özsüt |
| The Invention is related to increasing of early strength and final strengths of cements classified under EN and ASTM as Portland or CEM cements and also related to all clinker employing cements and to any kinds which employ calcium sulphates for set optimization and is for composing of new cements by only assessing new methods for production and is for composing of new cements by only assessing new methods to formation and inclusion of calcium sulphate resources which are used for set optimization. A new calcium sulphate resource is obtained by employing lower heats and this input is arranged to different dehydration levels at which they can be most efficient for the selected use. These different dehydration levels are called intermediate phases of dehydrate or hemihydrates or called as monohydrate. | ||||||
| 24 | COMPOSITE GYPSUM BOARD AND METHODS RELATED THERETO | US15186212 | 2016-06-17 | US20160375656A1 | 2016-12-29 | Alfred C. Li; Weixin D. Song; Yijun Sang; Gregg G. Diefenbacher; Annamaria Vilinska; Brian J. Christ; Fredrick T. Jones; Bradley W. Todd |
| Disclosed is a composite gypsum board comprising a board core and a concentrated layer of substantial thickness (e.g., at least about 0.02 inches). The concentrated layer includes a higher weight percentage of an enhancing additive than the board core. The board core has a thickness greater than the thickness of the concentrated layer and forms the bulk of the board volume. The concentrated layer has a higher density (e.g., at least about 1.1 times greater) than the density of the board core. Also disclosed is a method of preparing a composite gypsum board. | ||||||
| 25 | Building materials, compositions, and methods | US13722626 | 2012-12-20 | US08926855B2 | 2015-01-06 | Vincent B. Thomas; Jeffrey Thomas Fields |
| Building materials include a dampening layer which contains a plaster and a viscoelastic polymer, such as polyvinyl butyral. The dampening layer may also include a barium salt. Methods of making a sound dampening material include providing a plaster mixture. The mixture may include a viscoelastic polymer and/or a barium salt. The plaster mixture is combined with water and/or a viscoelastic polymer dispersion, to form a slurry. The slurry is applied to a surface and set to form a sound dampening layer. | ||||||
| 26 | Gypsum-containing products containing alpha hemihydrate | US11213529 | 2005-08-26 | US20070048549A1 | 2007-03-01 | Weixin Song; Qiang Yu; Qiangxia Liu |
| The invention provides gypsum wallboard, made from gypsum-containing slurries having outstanding hydration rate characteristics comprising alpha-hemihydrate ground to a particular particle size distribution range and having a Blaine surface area in the range from about 3100 cm2/g to about 9000 cm2/g, alone or in combination with beta-hemihydrate. | ||||||
| 27 | High permeability metal casting plaster and method of making same | US592618 | 1990-10-03 | US5164004A | 1992-11-17 | Eugene J. Kurty |
| A high permeability metal casting plaster is used for production of high accuracy simulated castings for prototypes and any other plastermold castings. Methods are provided that create the high permeability metal casting plaster and mold. Also, a high permeability metal casting plaster is disclosed that uses control ground and screened .alpha.-hemihydrate gypsum such that an average of 100% of the particles have a diameter of no more than 590 .mu.m and an average of 97.3% have a diameter of less that 44 .mu.m, control ground and screened beta-hemihydrate gypsum such that an average of 99% of the particles have a diameter of no more than 270 .mu.m and at least an average of 70% have a diameter of less than 44 .mu.m, sucrose for protection against thermal shock, and a foaming agent. The ratio of .alpha.-hemihydrate gypsum to .beta.-hemihydrate gypsum is approximately 5:2. | ||||||
| 28 | Continuous production of gypsum board | US315061 | 1989-02-24 | US4965031A | 1990-10-23 | Alan P. Conroy |
| A continuous process for the production of gypsum board of variable yet predictable density, wherein a fibrous from of stucco produced from gypsum crystals or fibers is combined with standard calcined gypsum and formed into the board. The density of the resultant board varies inversely with the content of fibrous stucco. The process yields lightweight boards suitable as standard wallboards and inorganic insulating boards. | ||||||
| 29 | Gypsum composition for denture investment | US516331 | 1983-07-22 | US4526619A | 1985-07-02 | Nobukazu Ohi; Koji Ohno; Satoshi Tosaki |
| A gypsum composition for denture investment consists of 100 parts by weight of a mixture of 50-90 parts by weight of .alpha.-Gypsum hemihydrate (.alpha.-CaSO.sub.4.1/2H.sub.2 O) with 10-50 parts by weight of .beta.-Gypsum hemihydrate (.beta.-CaSO.sub.4.1/2H.sub.2 O) and 0.2-2.0 parts by weight of a soluble potassium salt. As the soluble potassium salt, use may be made of one or more of potassium sulfate, potassium chloride and potassium tartrate. The gypsum composition may further include 0.5-5.0 parts by weight of dihydrate gypsum. | ||||||
| 30 | High strength gypsum plaster | US35595364 | 1964-03-30 | US3379545A | 1968-04-23 | SHULL JR JOHN D |
| 31 | Cement | US60949832 | 1932-05-05 | US2015676A | 1935-10-01 | HEISER HAROLD W |
| 32 | Gypsum concrete | US22161027 | 1927-09-23 | US1813452A | 1931-07-07 | KING GEORGE D; GOUGH FRED J |
| 33 | Method of Curing A Gypsum Calcination Product | US15110420 | 2015-01-08 | US20160340244A1 | 2016-11-24 | Cedric Biguenet |
| 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 conditioning the stucco particles, the bulk density of the stucco particles within the reaction vessel is at least 1 g/cm3. | ||||||
| 34 | LOWER HEAT PROCESSED CALCIUM SULPHATES FOR EARLY STRENGTH CEMENTS AND GENERAL USE | US14768759 | 2014-02-18 | US20160002106A1 | 2016-01-07 | Mustafa ÖZSÜT |
| The Invention is related to increasing of early strength and final strengths of cements classified under EN and ASTM as Portland or CEM cements and also related to all clinker employing cements and to any kinds which employ calcium sulphates for set optimization and is for composing of new cements by only assessing new methods for production and is for composing of new cements by only assessing new methods to formation and inclusion of calcium sulphate resources which are used for set optimization. A new calcium sulphate resource is obtained by employing lower heats and this input is arranged to different dehydration levels at which they can be most efficient for the selected use. These different dehydration levels are called intermediate phases of dehydrate or hemihydrates or called as monohydrate. | ||||||
| 35 | Method and apparatus for producing a multilayer cementitious product | US10561708 | 2004-06-23 | US08968621B2 | 2015-03-03 | Winfried Johannes Josef Spikermann; Kane Ian Ironside |
| 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. | ||||||
| 36 | BUILDING MATERIALS, COMPOSITIONS, AND METHODS | US13722626 | 2012-12-20 | US20140175320A1 | 2014-06-26 | Vincent B. Thomas; Jeffrey Thomas Fields |
| Building materials include a dampening layer which contains a plaster and a viscoelastic polymer, such as polyvinyl butyral. The dampening layer may also include a barium salt. Methods of making a sound dampening material include providing a plaster mixture. The mixture may include a viscoelastic polymer and/or a barium salt. The plaster mixture is combined with water and/or a viscoelastic polymer dispersion, to form a slurry. The slurry is applied to a surface and set to form a sound dampening layer. | ||||||
| 37 | High resistance gypsum parts and preparation method to obtain these parts | US12067803 | 2006-09-21 | US07910230B2 | 2011-03-22 | Milton Ferreira de Souza; Hebert Luis Rossetto; Wellington Massayuki Kanno |
| The preparation of gypsum parts (dihydrate calcium sulfate) with high mechanical strength is obtained with the aid of water layers with nanometric thickness. Calcium sulfate is used, dihydrate as well as hemihydrate, to obtain parts from these two materials, pure or mixed, especially to use in construction work, where the parts are prepared by compressing their slightly humidified powders. | ||||||
| 38 | Gypsum-containing products containing alpha hemihydrate | US11213529 | 2005-08-26 | US07771851B2 | 2010-08-10 | Weixin David Song; Qiang Yu; Qiangxia Liu |
| The invention provides gypsum wallboard, made from gypsum-containing slurries having outstanding hydration rate characteristics comprising alpha-hemihydrate ground to a particular particle size distribution range and having a Blaine surface area in the range from about 3100 cm2/g to about 9000 cm2/g, alone or in combination with beta-hemihydrate. | ||||||
| 39 | PRODUCTION METHOD OF WOOD CEMENT BOARD | US12414277 | 2009-03-30 | US20090243149A1 | 2009-10-01 | Yuji Yamazaki; Masaya Higuchi; Yoshinori Hibino |
| Provided is a high manufacturing method of the production efficiency for a wood cement board that has a pattern of recesses and projections.The method for making a wood cement board having a pattern of recesses and projections on its surface, comprising: dispersing a raw material mixture onto a template provided with recesses corresponding to the portions of the wood cement board on which projections are formed, while conveying the template, thereby forming a mat; pressurizing only a section of the mat raw material mixture that is layered on the recesses of the template from above; leveling the surface of the partly pressurized mat; and pressing the resulting mat and the template together, followed by hardening and curing. | ||||||
| 40 | Process for manufacturing ultra low consistency alpha- and beta- blend stucco | US11533604 | 2006-09-20 | US07588634B2 | 2009-09-15 | Michael R. Lynn; W. David Song; Qingxia Liu; Qiang Yu; Michael L. Cloud |
| A process is disclosed for making a blend of alpha- and beta-stucco including a slurry calcination step to produce alpha calcium sulfate hemihydrate followed by a fluidized bed calcination step to produce beta calcium sulfate hemihydrate. The process starts with 50-75% gypsum-containing solids slurry, and then steam calcines the slurry in a first reactor to form partially calcined gypsum slurry which contains calcium sulfate dihydrate and alpha calcium sulfate hemihydrate. The partially calcined slurry is then dewatered. Then the filter cake is fed into a kettle to complete the calcination process by converting the calcium sulfate dihydrate of the filter cake material into beta calcium sulfate hemihydrate. | ||||||
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