Reversible polymer gel binders for powder forming
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United States of America Patent
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Feb 11, 1997
Issued Date -
N/A
app pub date -
Nov 25, 1992
filing date -
May 30, 1989
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Abstract
Thermoplastic binder compositions comprising a high molecular weight polymer component and a molten wax component are compounded with sinterable ceramic or other inorganic powders. Upon cooling, a thermally reversible gel is formed in the binder by the gelation of the polymer in the molten wax. Ceramic batches comprising these binders behave as shear-thinning and thermally reversible gels. They exhibit substantially improved dewaxing performance and, preferably, extensibility sufficient for sheet reforming processes.
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