Patent US4784812A successfully refreshed from Google Patents.
US4784812A
Expired / Lapsed
US
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Ceramics binder and production of ceramics articles
Assignee: Idemitsu Petrochemical Co Ltd
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Filing: 1986-06-16
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Granted: 1988-11-15
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Expires: 2006-06-16
Abstract
Abstract Disclosed are a ceramics binder comprising an organic binding agent and adamantane and/or trimethylenenorbornane as a binding auxiliary, and a method for producing a ceramics article comprising mixing a ceramics raw material powder with a ceramics binder comprising an organic binding agent and adamantane and/or trimethylenenorbornane as a binding auxiliary, molding the resulting mixture by an injection molding method or an extrusion molding method to obtain a molded article, and sintering the molded article. When the ceramics binder is used in a dough for injection molding, the time required for eliminating the ceramics binder can be shortened and the content of the ceramics binder which remains in the molded articles after eliminating treatment can be reduced to a negligibly low level.
Inventors
- 👤 Katsuyoshi Saitoh
- 👤 Tsunenori Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:29
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A ceramics binder which comprises 0.5-50 parts by weight of at least one organic binding agent selected from the group consisting of a thermoplastic resin, a water-soluble binder and an organic solvent-soluble binder and 0.1-15 parts by weight of least one binding auxiliary selected from the group consisting of adamantane and trimethylenenorbornane.
Claim 2
Dependent Claim
52 words
A ceramics binder which comprises 0.5-50 parts by weight of at least one organic binding agent selected from the group consisting of a thermoplastic resin, a water-soluble binder and an organic solvent-soluble binder and 0.1-15 parts by weight of least one binding auxiliary selected from the group consisting of adamantane and trimethylenenorbornane.
Claim 3
Dependent Claim
70 words
A ceramics mixture for molding articles comprising a ceramics binder which comprises 0.5-50 parts by weight of at least one organic binding agent selected from the group consisting of a thermoplastic resin, a water-soluble binder and an organic solvent-soluble binder and 0.1-15 parts by weight of at least one binding auxiliary selected from the group consisting of adamantane and trimethylenenorbornane and 100 parts by weight of ceramics raw material powder.
Claim 4
Dependent Claim
70 words
A ceramics mixture for molding articles comprising a ceramics binder which comprises 0.5-50 parts by weight of at least one organic binding agent selected from the group consisting of a thermoplastic resin, a water-soluble binder and an organic solvent-soluble binder and 0.1-15 parts by weight of at least one binding auxiliary selected from the group consisting of adamantane and trimethylenenorbornane and 100 parts by weight of ceramics raw material powder.
Claim 5
Independent Claim
99 words
A method for making a ceramic article which comprises the following steps: mixing 0.6-65 parts by weight of a ceramics binder comprising 9.5-50 parts by weight of at least one organic binding agent selected from the group consisting of a thermoplastic resin, a water-soluble binder and an organic solvent-soluble binder and 9.1-15 parts by weight of at least one binding auxiliary selected from the group consisting of adamantane and trimethylenenorbornane with 100 parts by weight of a ceramics raw material powder at 80°-150° C., molding the resulting mixture by injection molding or extrusion molding, and sintering the molded article.
Claim 6
Independent Claim
99 words
A method for making a ceramic article which comprises the following steps: mixing 0.6-65 parts by weight of a ceramics binder comprising 9.5-50 parts by weight of at least one organic binding agent selected from the group consisting of a thermoplastic resin, a water-soluble binder and an organic solvent-soluble binder and 9.1-15 parts by weight of at least one binding auxiliary selected from the group consisting of adamantane and trimethylenenorbornane with 100 parts by weight of a ceramics raw material powder at 80°-150° C., molding the resulting mixture by injection molding or extrusion molding, and sintering the molded article.
Claim 7
Dependent Claim
39 words
A ceramics binder as claimed in claim 1, wherein said organic binding agent is at least one member selected from the group consisting of an ethylene-vinyl acetate copolymer, a polybutyl methacrylate, a polystyrene, a polyethylene, a polypropylene and wax.
Claim 8
Dependent Claim
13 words
A ceramics binder as claimed in claim 1, wherein said trimethylenenorbornane is endodtrimethylenenorbornane.
Claim 9
Dependent Claim
25 words
A ceramics binder as claimed in claim 1, wherein said ceramics binder further contains a member of the group consisting of plasticizer and a lubricant.
Claim 10
Dependent Claim
31 words
A method as claimed in claim 3, wherein said ceramics raw material powder is at least one member selected from the group consisting of alumina, zirconia, silicon nitride and silicon carbide.
Claim 11
Dependent Claim
31 words
A method as claimed in claim 3, wherein said ceramics raw material powder is at least one member selected from the group consisting of alumina, zirconia silicon nitride and silicon carbide
References Cited (Backward Citations)
US3607332A
Cited
US3953218A
Cited
US4336071A
Cited
US4496506A
Cited
US4540677A
Cited
US4474731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |