US4879055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft magnetic material composition and molding process therefor
Assignee: Kanegafuchi Chemical Industry Co Ltd
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Filing: 1986-04-16
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Granted: 1989-11-07
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Expires: 2006-04-16
Abstract
Abstract PCT No. PCT/JP86/00189 Sec. 371 Date Feb. 12, 1987 Sec. 102(e) Date Feb. 12, 1987 PCT Filed Apr. 16, 1986 PCT Pub. No. WO86/06541 PCT Pub. Date Nov. 6, 1986.There is provided a soft magnetic material composition comprising 70 to 95 vol % of soft magnetic material powder, with the balance being a liquid thermosetting resin. The composition has a high density and initial permeability. According to the process of this invention, the composition can be efficiently made into molded products of high permeability having a high strength and dimensional accuracy.
Inventors
- 👤 Koji Sezaki
- 👤 Koichi Nagai
- 👤 Takashi Sakauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:38
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/34; H01F1/36; H01F1/37; C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; H01F1/14; H01F1/147; H01F1/20; H01F1/22; H01F1/24; H01F1/26; Y; Y10; Y10S; Y10S264/00; Y10S264/58
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A soft magnetic material composition consisting essentially of 70 to 95 vol% of particles of spinel ferrite powder, wherein the particles of spinel ferrite powder have a diameter of at least 0.1 mm, and a fraction of said particles have a diameter of at least 0.6 mm, the balance of said composition being a liquid thermosetting resin containing 5 to 100 parts by weight of a plasticizer based on 100 parts by weight of solids of the liquid thermosetting resin.
Claim 2
Dependent Claim
80 words
A soft magnetic material composition consisting essentially of 70 to 95 vol% of particles of spinel ferrite powder, wherein the particles of spinel ferrite powder have a diameter of at least 0.1 mm, and a fraction of said particles have a diameter of at least 0.6 mm, the balance of said composition being a liquid thermosetting resin containing 5 to 100 parts by weight of a plasticizer based on 100 parts by weight of solids of the liquid thermosetting resin.
Claim 3
Dependent Claim
24 words
A composition as set foorth in claim 1, wherein the plasticizer is at least one member selected from polyester-based plasticizers and phthalic ester-based plasticizer.
Claim 4
Dependent Claim
121 words
A process for molding a plastics containing soft magnetic material composition of high permeability, said process comprising forming a molded article by compression molding at normal temperature a soft magnetic material composition consisting essentially of 70 to 95 vol% of particles of spinel ferrite powder, wherein the particles of spinel ferrite powder have a diameter of at least 0.1 mm, and a fraction of said particles have a diameter of of at least 0.6 mm, the balance of said composition being a liquid thermosetting resin containing 5 to 100 parts by weight of a plasticizer based on 100 parts of solids of the liquid thermosetting resin, and subsequently solidifying the molded article at a curing temperature of the liquid thermosetting resin.
Claim 5
Dependent Claim
121 words
A process for molding a plastics containing soft magnetic material composition of high permeability, said process comprising forming a molded article by compression molding at normal temperature a soft magnetic material composition consisting essentially of 70 to 95 vol% of particles of spinel ferrite powder, wherein the particles of spinel ferrite powder have a diameter of at least 0.1 mm, and a fraction of said particles have a diameter of of at least 0.6 mm, the balance of said composition being a liquid thermosetting resin containing 5 to 100 parts by weight of a plasticizer based on 100 parts of solids of the liquid thermosetting resin, and subsequently solidifying the molded article at a curing temperature of the liquid thermosetting resin.
Claim 6
Dependent Claim
26 words
A molding process as set forth in claim 3, wherein the compression molding is carried out under a pressure of 2 to 6 t/cm 2 .
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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) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |