Compositions: coating or plastic – Coating or plastic compositions – Molds and mold coating compositions
Patent
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.
Caster Sandra A.
Higginbotham Clayton E.
Allen R. M.
Nutter Nathan M.
Union Carbide Chemicals & Plastics Technology Corporation
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