Process of dough forming of polymer-metal blend suitable for shape forming
AssigneeIndian Institute of Technology
InventorsPavan Kumar Srivas, Kausik Kapat, Santanu Dhara
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Abstract
Processing of polymer-metal blend composition involving viscosity control under ambient conditions suitable for shape forming and homogeneous green body preparation. The advancement involves effective controlling of the rate of settling of the metal particles in polymer-metal blend under ambient conditions to generate a cost effective and simple process for producing shape formable dough. Advantageously, the present invention provides a rapid, energy saving process involving minimum material loss and utilizing non hazardous solvent system such as water.
Claims15
A process of dough forming of polymer-metal blend compositions with increased viscosity suitable for shape forming comprising:
- i) providing polymeric solution and coagulant with or without other additives to provide a polymer-coagulant composition;
- ii) subjecting said polymer-coagulant composition to vigorous stirring to increase viscosity by frothing thereby incorporating air bubbles into said polymer-coagulant composition to obtain a porous polymer-coagulant composition;
- and
- iii) thereafter gradually adding the metal powder to said porous polymer-coagulant composition of step ii) above to thereby further increase of viscosity of said metal powder dispersion in porous polymer-coagulant composition and generate a porous shape formable dough under ambient condition with improved viscosity.
A process of dough forming of polymer-metal blend compositions with increased viscosity suitable for shape forming comprising:
- i) providing metal powder;
- ii) adding said metal powder to polymer with or without additives to obtain a polymer-metal blend composition;
- and
- iii) subjecting the said metal polymer-metal blend composition to high shear mixing involving plastic dough processing to thereby generate shape formable plastic dough.
Dependencies are inferred from the claim text.