Claims
- 1. A composition for use in making rigid articles by sintering and comprising: a flowable mixture of sinterable powdered material and a liquid vehicle for the powdered material said vehicle comprising a small but effective amount of a surface active agent, a fugitive binder and a solvent therefor, said solvent evaporating below 200.degree. F., said fugitive binder being gassifiable without leaving any substantial residue and said fugitive binder volatilizing at a temperature substantially below the sintering temperature of the powdered material.
- 2. A composition according to claim 1 in which said sinterable powdered material comprises at least one durable material selected from the group consisting of metals, metal alloys, metal carbides, and ceramics.
- 3. A composition according to claim 1 in which said fugitive binder is selected from the class of soluble plastics which includes a copolymer of ethylene and vinyl acetate.
- 4. A composition according to claim 1 in which said solvent is selected from the class of chlorinated hydrocarbons.
- 5. A composition according to claim 1 in which said powdered material comprises a mixture of metal carbide powder and a binder metal therefor.
- 6. A composition according to claim 5 in which said metal carbide comprises tungsten carbide and said powdered material includes tungsten metal in the amount of about 4.6 weight percent of the composition.
- 7. A composition according to claim 1 in which said powdered material is admixed with about 0.1 weight percent paraffin wax.
- 8. A composition for use in making rigid articles by sintering and comprising a flowable mixture of sinterable powdered material which includes metal carbide and a liquid vehicle for the powdered material, said vehicle comprising a fugitive binder including a copolymer of ethylene and vinyl acetate and a solvent therefor, said solvent evaporating at a first temperature, said fugitive binder being gassifiable without leaving any substantial residue at a second and higher temperature, and said powdered material sintering at a third and still higher temperature.
- 9. The composition of claim 1 wherein the surface active agent is of the cationic type.
Parent Case Info
This is a continuation of application Ser. No. 854,775, filed Nov. 25, 1977, now abandoned, which was a streamlined continuation of application Ser. No. 409,728, filed Oct. 25, 1973, now abandoned.
US Referenced Citations (3)
Non-Patent Literature Citations (2)
Entry |
Kirk-Othmer, "Encyclopedia of Chemical Technology", vol. 1, pp. 28 and 35. |
Kirk-Othmer, "Encyclopedia of Chemical Technology", vol. 16, pp. 402 and 415. |
Continuations (2)
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Number |
Date |
Country |
Parent |
854775 |
Nov 1977 |
|
Parent |
409728 |
Oct 1973 |
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