Gypsum composition for denture investment

Details Gypsum composition for denture investment Gypsum composition for denture investment

1983-07-22

1985-07-02

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Dental

106109, 433199, 433201, C09K 300

Patent

active

045266190

ABSTRACT:
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.

REFERENCES:
patent: 3305375 (1967-02-01), Jakacki

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