Dental investment compositions in low-dusting powdery form

Details Dental investment compositions in low-dusting powdery form Dental investment compositions in low-dusting powdery form

1988-08-18

1990-03-20

Willis, Prince E.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 35, 106383, 106109, 106110, 106111, 164DIG4, 4331991, 433213, 433214, A61C 900, B28B 234, C04B 2400

Patent

active

049098470

ABSTRACT:
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.degree. C., and (d) one or more anionic surface active agents selected from the group consisting of alkylbenzene sulfonates and alkyl sulfates.

REFERENCES:
patent: 3850870 (1974-11-01), Kawakami et al.
patent: 3947285 (1976-03-01), Jones et al.
patent: 3966479 (1976-06-01), Koblitz
patent: 4394172 (1983-07-01), Scheuble et al.
patent: 4478641 (1984-10-01), Adair et al.
patent: 4526619 (1985-07-01), Otti et al.
patent: 4543372 (1985-09-01), Watanabe et al.
patent: 4604142 (1986-08-01), Kamohara et al.
patent: 4661071 (1987-04-01), Bell et al.
patent: 4662924 (1987-05-01), Kobayashi et al.
patent: 4670053 (1987-06-01), Kooke et al.

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