US5290336A
Expired / Lapsed
US
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Iron-based powder compositions containing novel binder/lubricants
Assignee: Hoeganaes Corp
•
Filing: 1992-05-04
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Granted: 1994-03-01
•
Expires: 2012-05-04
Abstract
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.
Inventors
- 👤 Sydney Luk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:27
CPC Classifications
B; B22; B22F; B22F1/00; B22F1/10; B22F1/103; C; C10; C10M; C10M111/00; C10M111/04; B22F10/00; B22F10/10; B22F10/18; C10M103/00; C10M103/02; C10M103/04; C10M105/00; C10M105/08; C10M105/22; C10M105/26; C10M105/32; C10M105/36; C10M105/74; C10M107/00; C10M107/20; C10M107/22; C10M107/28; C10M107/30; C10M107/32; C10M107/34; C22; C22C; C22C33/00; B22F3/00; B22F3/02; B22F2003/023; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/0413; C10M2201/042; C10M2201/0423; C10M2201/043; C10M2201/05; C10M2201/053; C10M2201/06; C10M2201/061; C10M2201/065; C10M2201/066; C10M2201/10; C10M2201/16; C10M2201/18; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/1233; C10M2207/125; C10M2207/127; C10M2207/1273; C10M2207/129; C10M2207/1293; C10M2207/22; C10M2207/223; C10M2207/28; C10M2207/282; C10M2207/2825; C10M2207/284; C10M2207/285; C10M2207/2855; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/0845; C10M2209/086; C10M2209/0863; C10M2209/10; C10M2209/103; C10M2209/1033; C10M2209/104; C10M2209/1045; C10M2209/105; C10M2209/1055; C10M2209/106; C10M2209/1065; C10M2209/107; C10M2209/1075; C10M2209/108; C10M2209/1085; C10M2209/109; C10M2209/1095; C10M2211/00; C10M2211/02; C10M2223/00; C10M2223/003; C10M2223/02; C10M2223/023; C10M2223/04; C10M2223/0405; C10M2223/041; C10M2223/042; C10M2223/049; C10M2223/0495; C10M2223/06; C10M2223/0603; C10M2223/08; C10M2223/083; C10M2223/10; C10M2223/103; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
32 words
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.
Claim 2
Dependent Claim
32 words
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.
Claim 3
Dependent Claim
30 words
The composition of claim 1 wherein said dibasic organic acid has a formula: HOOC--R.sub.1 --COOH wherein R 1 is alkyl or alkenyl having from 1 to about 10 carbon atoms.
Claim 4
Dependent Claim
32 words
The composition of claim 2 wherein said dibasic organic acid is oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, or combinations thereof.
Claim 5
Dependent Claim
13 words
The composition of claim 2 wherein said dibasic organic acid is azelaic acid.
Claim 6
Dependent Claim
14 words
The composition of claim 1 wherein said polyether is a solid under ambient conditions.
Claim 7
Dependent Claim
28 words
The composition of claim 5 wherein said solid polyether comprises a plurality of subunits of a formula: --[O(CH.sub.2).sub.q ]-- Wherein q is from about 1 to about 7.
Claim 8
Dependent Claim
42 words
The composition of claim 5 wherein said solid polyether has a formula: H--[O(CH.sub.2).sub.q ].sub.n --OH wherein q is from about 1 to about 7 and n is selected such that the polyether has a weight average molecular weight greater than about 10,000.
Claim 9
Dependent Claim
29 words
The composition of claim 7 wherein q is 2 and n is selected such that the polyether has a weight average molecular weight of about 20,000 or about 100,000.
Claim 10
Dependent Claim
26 words
The composition of claim 7 wherein n is selected such that the polyether has a weight average molecular weight of from about 2,000 to about 180,000.
Claim 11
Dependent Claim
25 words
The composition of claim 7 wherein n is selected such that the polyether has a weight average molecular weight of about 20,000 or about 100,000.
Claim 12
Dependent Claim
14 words
The composition of claim 1 wherein said polyether is a liquid under ambient conditions.
Claim 13
Dependent Claim
28 words
The composition of claim 11 wherein said liquid polyether comprises a plurality of subunits of a formula: --[O(CH.sub.2).sub.q ]-- wherein q is from about 1 to about 7.
Claim 14
Dependent Claim
11 words
The composition of claim 12 wherein q is 2 or 3.
Claim 15
Dependent Claim
19 words
The composition of claim 12 wherein the liquid polyether has a weight average molecular weight less than about 8000.
Claim 16
Dependent Claim
11 words
The composition of claim wherein said blend further comprises acrylic resin.
Claim 17
Dependent Claim
18 words
The composition of claim 15 wherein said acrylic resin contains polymers of acrylic acid or of methacrylic acid.
Claim 18
Dependent Claim
43 words
The composition of claim 15 wherein said acrylic resin includes more than one subunit of a formula: --[CH.sub.2 --C(H)(R.sub.2)--COOR.sub.3 ]-- wherein R 2 is H or methyl, and R 3 is H, alkyl or alkenyl having from 1 to about 7 carbon atoms.
Claim 19
Dependent Claim
18 words
The composition of claim 17 wherein R 2 is H and R 3 is H, methyl, or butyl.
Claim 20
Dependent Claim
9 words
The composition of claim 1 further comprising a plasticizer.
Claim 21
Dependent Claim
19 words
The composition of claim 19 wherein said plasticizer is an ester of phthalic acid, phosphoric acid, or dibasic acid.
Claim 22
Dependent Claim
9 words
The composition of claim 1 further comprising alloying powder.
Claim 23
Dependent Claim
11 words
The composition of claim 21 wherein said alloying powder comprises graphite.
Claim 24
Dependent Claim
21 words
The composition of claim 21 wherein said alloying powder constitutes from about 0.01 to about 3 weight percent of said composition.
Claim 25
Dependent Claim
18 words
The composition of claim wherein blend constitutes from about 0.3 to about 3.0 weight percent of the composition.
Claim 26
Dependent Claim
19 words
The composition of claim 1 wherein blend constitutes from about 0.8 to about 1.2 weight percent of the composition.
Claim 27
Dependent Claim
20 words
The composition of claim 1 wherein the blend comprises from about 1 to about 10 weight percent dibasic organic acid.
Claim 28
Dependent Claim
27 words
The composition of claim 1 wherein the blend comprises from about 50 to about 90 weight percent of a polyether that is a solid under ambient conditions.
Claim 29
Dependent Claim
27 words
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.
Claim 30
Dependent Claim
18 words
The composition of claim wherein the blend comprises from about 5 to about 50 weight percent acrylic resin.
Claim 31
Dependent Claim
109 words
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.
Claim 32
Dependent Claim
14 words
A shaped article prepared by compacting the composition of claim 1 in a die.
Claim 33
Dependent Claim
19 words
A shaped article prepared by compacting the composition of claim 1 in a die and sintering the resultant compact.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-28 | 1997-08-30 | 1998-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-28 | 2001-08-30 | 2002-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-28 | 2005-08-30 | 2006-03-01 | $7700.00 | Window Closed / Lapsed |