Gel strength enhancing additives for agaroid-based injection mol

Details Gel strength enhancing additives for agaroid-based injection mol Gel strength enhancing additives for agaroid-based injection mol

1997-02-05

1998-05-05

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

264621, 2643282, 419 36, C04B 3564

Patent

active

057469571

ABSTRACT:
Parts from ceramic and/or metal powder(s) are shaped by a process that comprises the steps of (1) forming a mixture comprising ceramic and/or metal powder(s), a gel-forming material chosen from the class of polysaccharides known as "agaroids", a gel-forming solvent, and a gel strength enhancing agent, and said mixture being formed in a blender that provides a shearing action and being heated to raise the temperature of the mixture to about 70.degree. C. to 100.degree. C.; and (2) molding the mixture at a temperature sufficient to produce a self-supporting structure comprising the powder and gel. The parts exhibit excellent green strength and are rapidly fired without cracking, distortion or shrinkage problems.

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patent: 5286767 (1994-02-01), Rohrbach et al.
patent: 5397520 (1995-03-01), Rohrbach et al.

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