Casting and moulding compositions

Details Casting and moulding compositions Casting and moulding compositions

1978-04-13

1980-02-26

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

C04B 1900

Patent

active

041904532

ABSTRACT:
A process for preparing a heat-settable casting or moulding composition comprises forming a mixture of a refractory oxide, preferably alumina, and a polyvalent metal polyphosphate, the polyvalent metal being preferably magnesium, aluminium, cobalt or zinc. The mixture is preferably formed by precipitating the polyvalent metal polyphosphate from an aqueous solution of an alkali metal polyphosphate in the presence of the refractory oxide by the addition of a water soluble polyvalent metal salt to the solution.
The compositions are useful in making encapsulated or "potted" components such as resistance thermometers and thermocouples.

REFERENCES:
patent: 3179524 (1965-04-01), Hunter
patent: 3329516 (1967-07-01), Chvatal
patent: 3547670 (1970-12-01), Fuchs et al.
patent: 3885978 (1975-05-01), Doi et al.

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