Aqueous injection molding binder composition and molding process
First Claim
Patent Images
1. A composition for forming molded articles comprising:
- a) at least one metal powder, at least one ceramic powder, or a combination thereof;
b) a gel forming polysaccharide binder; and
c) a sugar.
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Abstract
This invention provides a composition and a process for forming sintered, molded articles having improved dimensional stability. More particularly, this invention pertains to a composition having a sugar additive that increases the solids loading potential of the composition and a process for forming injection molded articles therefrom. Increasing the solids loading potential of the composition, enables the formation of metal or ceramic articles attaining about 98-99% of their theoretical maximum density, without cracking or shrinking significantly during sintering.
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Citations
37 Claims
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1. A composition for forming molded articles comprising:
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a) at least one metal powder, at least one ceramic powder, or a combination thereof;
b) a gel forming polysaccharide binder; and
c) a sugar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A process for forming molded articles comprising:
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A) forming a fluid composition comprising;
i) at least one ceramic powder, at least one metal powder, or a combination thereof;
ii) a gel forming polysaccharide binder;
iii) a sugar; and
iv) a solvent;
B) molding the composition under conditions sufficient to form a solid molded article; and
C) sintering the molded article. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A process for forming molded articles comprising:
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A) forming a fluid composition comprising;
i) at least one ceramic powder, at least one metal powder, or a combination thereof;
ii) a gel forming polysaccharide binder;
iii) a sugar; and
iv) a solvent; and
B) molding the composition under conditions sufficient to form a solid molded article. - View Dependent Claims (37)
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Specification