| abstract |
PROBLEM TO BE SOLVED: To provide a dental gypsum powder capable of suppressing the generation of bubbles in a kneaded product simply by kneading with water without using a special device or instrument and without using an emulsifier or a kneading liquid. A cyclic siloxanes having SiO (CH 3) 3~10 2 units to the dental plaster powder, characterized in that it contains from 0.00001 to 0.0005% by weight. The cyclic siloxane is preferably, for example, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, or decamethylcyclopentasiloxane. [Selection figure] None |