US4866157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting aromatic resin composition
Assignee: Individual
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Filing: 1988-11-07
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Granted: 1989-09-12
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Expires: 2008-11-07
Abstract
Abstract A thermosetting resin composition is disclosed which comprises a fusible product obtained by a method including the steps of: providing a mixture which comprises (a) a raw material containing one or more condensed polynuclear aromatic compounds having at least two condensed benzene rings, (b) a crosslinking agent containing an aromatic compound having one or more aldehyde groups directly bonded to the aromatic nuclei thereof, and (c) an acid catalyst; and reacting the mixture at a temperature sufficient to effect the crosslinking of the one or more condensed polynuclear aromatic compounds, thereby to obtain the fusible product. A further heat treatment of the thermosetting resin composition gives a COPNA resin which is an infusible, insoluble, condensed, polynuclear aromatic hydrocarbon resin.
Inventors
- 👤 Sugio Otani
- 👤 Michiya Ota
- 👤 Akira Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:03
CPC Classifications
C; C08; C08G; C08G10/00; C08G10/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A thermosetting resin composition comprising a fusible product obtained by a method including the steps of: providing a mixture which comprises (a) a raw material containing one or more condensed polynuclear aromatic compounds having at least two condensed benzene rings, (b) a crosslinking agent containing an aromatic compound having one or more aldehyde groups directly bonded to the aromatic nuclei thereof, and (c) an acid catalyst; and reacting said mixture at a temperature sufficient to effect the crosslinking of said one or more condensed polynuclear aromatic compounds, thereby to obtain said fusible product.
Claim 2
Dependent Claim
93 words
A thermosetting resin composition comprising a fusible product obtained by a method including the steps of: providing a mixture which comprises (a) a raw material containing one or more condensed polynuclear aromatic compounds having at least two condensed benzene rings, (b) a crosslinking agent containing an aromatic compound having one or more aldehyde groups directly bonded to the aromatic nuclei thereof, and (c) an acid catalyst; and reacting said mixture at a temperature sufficient to effect the crosslinking of said one or more condensed polynuclear aromatic compounds, thereby to obtain said fusible product.
Claim 3
Dependent Claim
36 words
A composition as set forth in claim 1, wherein said raw material is selected from the group consisting of naphthalene, phenanthrene, anthracene, pyrene, chrysene, naphthacene, fluoranthene, perylene, picene, benzpyrenes, benzperylenes, derivatives and mixtures thereof, and pitches.
Claim 4
Dependent Claim
19 words
A composition as set forth in claim 1, wherein said crosslinking agent is benzaldehyde, terephthaladehyde, naphthylaldehyde and derivatives thereof.
Claim 5
Dependent Claim
19 words
A composition as set forth in claim 1, wherein said reaction is performed at a temperature of 100°-350° C.
Claim 6
Dependent Claim
20 words
A composition as set forth in claim 1, further comprising an aggregate selected from glass fibers, carbon fibers and ceramics.
Claim 7
Dependent Claim
101 words
A process for the production of a heat-resisting, condensed polynuclear aromatic hydrocarbon resin, comprising the steps of: providing a mixture which comprises (a) a raw material containing one or more condensed polynuclear aromatic compounds having at least two condensed benzene rings, (b) a crosslinking agent containing an aromatic compound having one or more aldehyde groups directly bonded to the aromatic nuclei thereof, and (c) an acid catalyst; reacting said mixture at a temperature sufficient to effect the crosslinking of said one or more condensed polynuclear aromatic compounds and to form the heat-resisting, condensed polynuclear aromatic hydrocarbon resin as an infusible product.
Claim 8
Dependent Claim
101 words
A process for the production of a heat-resisting, condensed polynuclear aromatic hydrocarbon resin, comprising the steps of: providing a mixture which comprises (a) a raw material containing one or more condensed polynuclear aromatic compounds having at least two condensed benzene rings, (b) a crosslinking agent containing an aromatic compound having one or more aldehyde groups directly bonded to the aromatic nuclei thereof, and (c) an acid catalyst; reacting said mixture at a temperature sufficient to effect the crosslinking of said one or more condensed polynuclear aromatic compounds and to form the heat-resisting, condensed polynuclear aromatic hydrocarbon resin as an infusible product.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |