Claims
- 1. An iron/polymer powder composition of iron-based powder particles to which is bonded a polymeric material wherein the composition is made according to a method comprising the steps of:
- (a) forming a dry admixture of iron-based powder particles and particles of a polymeric material, the polymer constituting about 0.001-5.0% by weight of the admixture;
- (b) wetting the dry admixture with a solvent for the polymeric material; and
- (c) removing the solvent.
- 2. The powder composition of claim 1 wherein the polymeric material is a thermoplastic polymer and the iron-based powder particles are substantially pure iron.
- 3. The powder composition of claim 1 wherein the thermoplastic material is a polyetherimide, a polyphenylene ether, a polyethersulfone, or a polycarbonate.
- 4. The powder composition of claim 3 wherein said wetting step comprises spraying the solvent onto the admixture while further mixing the admixture, and wherein the solvent is methylene chloride.
- 5. The powder composition of claim 3 wherein the iron particles have a weight average particle size up to about 500 microns and wherein the particles of polymeric material are finer than about 250 microns.
- 6. The powder composition of claim 3 wherein the polymer constitutes about 0.2-5% by weight of said dry admixture.
- 7. The powder composition of claim 3 wherein the polymer constitutes about 0.2-5% by weight of said dry admixture.
- 8. An iron/polymer powder composition of iron-based powder particles to which is bonded a polymeric material wherein the composition is made according to a method comprising the steps of:
- (a) forming a dry admixture of iron-based powder particles and particles of a polymeric material, the polymer constituting about 0.6-1% by weight of the admixture, wherein the iron-based particles have a weight average size up to about 500 microns, and wherein the particles of polymeric material are finer than about 150 microns;
- (b) wetting the dry admixture with a solvent for the polymeric material; and
- (c) removing the solvent.
- 9. The powder composition of claim 8 wherein the thermoplastic material comprises a polyetherimide, a polyphenylene ether, a polyethersulfone, or a polycarbonate, wherein the particles of thermoplastic are finer than about 105 microns, and wherein the iron-based particles have a weight average size less than about 250 microns.
- 10. The powder composition of claim 9 wherein the solvent comprises methylene chloride.
Parent Case Info
This is a division of U.S. patent application Ser. No. 07/830,137, filed Jan. 31, 1992, now U.S. Pat. No. 5,225,459.
US Referenced Citations (12)
Divisions (1)
|
Number |
Date |
Country |
Parent |
830137 |
Jan 1992 |
|