DENTAL PLASTER POWDER

PROBLEM TO BE SOLVED: To provide dental plaster powder that has flowing properties, a cure time and strength of a hardened body suitable for dentistry for making a dental model by kneading with water and using it.SOLUTION: Dental plaster powder is configured such that gypsum dihydrate of 2-4 pts.wt....

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Bibliographic Details
Main Authors HORIUCHI HARUHIKO, MORI DAIZABURO, FUKUSHIMA EMIKO
Format Patent
LanguageEnglish
Japanese
Published 08.03.2018
Subjects
APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
CHEMISTRY
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
DENTISTRY
HUMAN NECESSITIES
HYGIENE
INORGANIC CHEMISTRY
MEDICAL OR VETERINARY SCIENCE
METALLURGY
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Summary:PROBLEM TO BE SOLVED: To provide dental plaster powder that has flowing properties, a cure time and strength of a hardened body suitable for dentistry for making a dental model by kneading with water and using it.SOLUTION: Dental plaster powder is configured such that gypsum dihydrate of 2-4 pts.wt., potassium sulfate of 0.5-3 pts.wt. and polycarboxylate-based water reducer of 0.05-0.8 pts.wt. are blended to gypsum hemihydrate of 100 pts.wt., and other additives are not contained beyond 0.3 pts.wt. in total. More preferably, a blending amount of the polycarboxylate-based water reducer may be 0.15-0.3 pts.wt. to the gypsum hemihydrate of 100 pts.wt., or the blending amount of the potassium sulfate may be equal to or more than 25% by weight of the gypsum dihydrate.SELECTED DRAWING: None 【課題】水と練和して使用することで歯科用模型を作製するための歯科に適した流動性、硬化時間及び硬化体の強度を有する歯科用石膏粉末を提供する。【解決手段】歯科用石膏粉末を、半水石膏１００重量部に対して、二水石膏２〜４重量部、硫酸カリウム０．５〜３重量部、ポリカルボン酸塩系の減水剤０．０５〜０．８重量部が配合され、その他の添加剤を合計で０．３重量部を超えて含まない構成とする。ポリカルボン酸塩系の減水剤の配合量が、半水石膏１００重量部に対して、０．１５〜０．３重量部であったり、硫酸カリウムの配合量が、二水石膏の２５重量％以上〜同量であるとより好ましい。【選択図】なし
Bibliography:Application Number: JP20170219206