Iron-based powder compositions containing novel binder/lubricants
AssigneeHoeganaes Corporation
InventorSydney Luk
Life of this patent
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Abstract
Iron-based metallurgical powder compositions are produced by mixing iron-based powder with an improved binder/lubricant that comprises dibasic organic acid and one or more additional components such as solid polyethers, liquid polyethers, and acrylic resin. These novel binder/lubricants impart one or more enhanced green properties to the powder compositions and reduce the ejection force required to remove the compositions from molds and dies.
Claims32
A metallurgical powder composition comprising iron-based powder admixed with about 0.3 to about 10 weight percent, based on the total composition weight, of a blend that comprises dibasic organic acid and polyether.
The composition of claim wherein said blend further comprises acrylic resin.
The composition of claim wherein blend constitutes from about 0.3 to about 3.0 weight percent of the composition.
The composition of claim i wherein the blend comprises from about 5 to about 50 weight percent of a polyether that is a liquid under ambient conditions.
The composition of claim wherein the blend comprises from about 5 to about 50 weight percent acrylic resin.
The composition of claim wherein the blend comprises:
- (a) dibasic organic acid;
- and a polyether that is a solid under ambient conditions;
- or
- (b) dibasic organic acid;
- a polyether that is a solid under ambient conditions;
- and a polyether that is a liquid under ambient conditions;
- or
- (c) dibasic organic acid;
- a polyether that is a solid under ambient conditions;
- a polyether that is a liquid under ambient conditions;
- and a acrylic resin;
- or
- (d) dibasic organic acid;
- a polyether that is a solid under ambient conditions;
- and an acrylic resin;
- or
- (e) dibasic organic acid;
- a polyether that is a liquid under ambient conditions;
- and an acrylic resin.
Dependencies are inferred from the claim text.