Compositions containing certain metallocenes and their uses
View Patent ↗Compositions comprising (1) a refractory and/or a binder, and (2) bis-cyclopentadienyl iron cyclopentadienyl manganese tricarbonyl, derivatives thereof, and mixtures thereof.
1. A process for preparing a foundry shape comprising the steps of:
forming a shape in a pattern from an amount of a refractory composition, the refractory composition comprising:
a major amount of a refractory;
a binder; and
at least one of: cyclopentadienyl manganese tricarbonyl, derivatives thereof, and mixtures thereof, present in an amount of from about 0.0005 parts to about 4 parts by weight, based on the weight of the resulting refractory composition;
curing the formed shape; and
removing the cured shape from the pattern as a foundry shape.
2. The process of claim 1 , wherein the refractory composition further comprises:
5 parts by weight to 30 parts by weight of an oxidizable metal,
2 parts by weight to 10 parts by weight of a compound that is a source of oxygen.
3. The process of claim 2 , wherein:
the refractory composition further comprises an initiator for an exothermic reaction.
4. The process of claim 1 , wherein the curing step is effected by a curing catalyst.
5. The process of claim 1 wherein:
the binder is a phenolic urethane binder.
6. The process of claim 4 , wherein:
the curing catalyst is a liquid catalyst that is mixed with the refractory composition prior to introducing the refractory composition into the pattern.
7. The process of claim 4 , wherein:
the curing catalyst is a vaporous curing catalyst which contacts the formed shape.
8. The process of claim 7 wherein:
the catalyst is a vaporous amine curing catalyst.
9. A process for casting a metal part comprising:
inserting a foundry shape prepared in accordance with claim 1 into a casting assembly;
pouring metal, while in the liquid state, into said casting assembly;
allowing said metal to cool and solidify, resulting in a cast metal part; and
separating the cast metal part from the casting assembly.
10. A process for preparing a foundry shape comprising the steps of:
forming a shape in a pattern from an amount of a refractory composition, the refractory composition comprising:
a major amount of a refractory;
a phenolic urethane binder; and
at least one of: bis cyclopentadienyl iron, derivatives thereof, and mixtures thereof, present in an amount of from about 0.0005 parts to about 4 parts by weight, based on the weight of the resulting refractory composition;
curing the formed shape; and
removing the cured shape from the pattern as a foundry shape.