Investment casting compositions and processes for the manufactur

Details Investment casting compositions and processes for the manufactur Investment casting compositions and processes for the manufactur

1991-04-12

1993-01-12

Nutter, Nathan M.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 3822, 106 383, 524445, 524446, 524447, 264221, 264226, 264227, 164 36, C28B 736, C04B 3568, C04B 2826

Patent

active

051786737

ABSTRACT:
This invention relates to investment casting compositions comprising (i) a refractory material, e.g., a ceramic material, and (ii) a soluble core material comprising one or more block polymers characterized by an ABCBA structure. This invention also relates to methods for investment casting and to the manufacture of molded articles. The soluble core materials exhibit desirable breaking strength, dissolution rate and surface characteristics.

REFERENCES:
patent: 3465808 (1969-09-01), Uram
patent: 3857435 (1974-12-01), Burkert et al.
patent: 4108931 (1978-08-01), Ogden
patent: 4556528 (1985-12-01), Gersch et al.
patent: 4763715 (1988-08-01), Cannarsa et al.
patent: 4773466 (1988-09-01), Cannarsa
patent: 5084493 (1992-01-01), Olson et al.

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