Dental investment compositions in low-dusting powdery form

摘要

A dental investement composition in the low-dusting powdery form contains (a) a mixture of a soluble phosphate with magnesium oxide or hemihydrate gypsum as a binder, (b) quartz and/or christobalite as a refractory material, (c) one or more wetting agents selected from the group consisting of hydrophobic liquid hydrocarbons, liquid hydrophobic fatty acid esters and liquid hydrophobic fatty acids showing a vapor pressure of 3.15 mmHg or below 20 DEG C., and (d) one or more anionic surface active agents selected from the group consisting of alkylbenzene sulfonates and alkyl sulfates.