Dustfree investment material for accurately fitting cast pieces

Details Dustfree investment material for accurately fitting cast pieces Dustfree investment material for accurately fitting cast pieces

1991-10-07

1993-10-05

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 35, 106 3851, 106 386, 164521, 164527, B28B 734, B22C 122, C09B 300

Patent

active

052501108

ABSTRACT:
Dustfree investment materials, for the production of accurately fitting cast parts, are described which contain water-soluble phosphates, magnesium oxide and silicon dioxide. The investment material is made up of two components (a) and (b) and component (a) contains the entire magnesium oxide, optionally a part of the silicon dioxide and, in the presence of silicon dioxide, 0.4 to 6% by weight of a hydrophile, organic solvent, and component (b) contains the phosphate, the remainder of the silicon dioxide and at least 0.5% by weight water.

REFERENCES:
patent: 2466138 (1949-04-01), Wainer
patent: 2479504 (1949-08-01), Moore et al.
patent: 2875073 (1959-02-01), Gogek
patent: 3074803 (1963-01-01), McGowan et al.
patent: 3081177 (1963-03-01), Garay et al.
patent: 4814011 (1989-03-01), Kamohara et al.
patent: 4909847 (1990-03-01), Ohi et al.
Derwent Publications, Section Ch, Week 8401, Class E17, AN 84-03437 and JP-58 199, 639 (English language abstract), Nov. 1983.

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