Patent US4855339A successfully refreshed from Google Patents.
US4855339A
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Epoxy resin composition
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1989-01-19
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Granted: 1989-08-08
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Expires: 2009-01-19
Abstract
Abstract An epoxy resin composition comprising (A) an epoxy resin having three or more epoxy groups per a molecule and (B) a reactive oligomer having in its molecule an aromatic residue connected thereto by -O- or -S- linkage and having at the terminal of the molecule a phonolic hydroxyl group.
Inventors
- 👤 Yasuhisa Saito
- 👤 Hisao Takagishi
- 👤 Hiroshi Nakamura
- 👤 Kohichi Okuno
- 👤 Yutaka Shiomi
- 👤 Kunimasa Kamio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:14
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/50; C08G59/504; C08G59/56; C08G64/00; C08G64/04; C08G64/06; C08L; C08L63/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
61 words
An epoxy resin composition comprising (A) an epoxy resin having three or more epoxy groups per molecule and (B) a reactive oligomer having an average molecular weight of about 400 to 5,000 selected from the oligomers represented by the following formulas, ##STR16## wherein n denotes a positive number, and Ar 1 , and Ar 2 each denotes an aromatic divalent group.
Claim 2
Dependent Claim
61 words
An epoxy resin composition comprising (A) an epoxy resin having three or more epoxy groups per molecule and (B) a reactive oligomer having an average molecular weight of about 400 to 5,000 selected from the oligomers represented by the following formulas, ##STR16## wherein n denotes a positive number, and Ar 1 , and Ar 2 each denotes an aromatic divalent group.
Claim 3
Dependent Claim
14 words
An epoxy resin composition according to claim 1, which contains (C) an epoxy-curing agent.
Claim 4
Dependent Claim
34 words
An epoxy resin composition according to claim 1, wherein the amount of the reactive oligomer is 20 to 80% by weight relative to the total amount of the epoxy resin and the reactive oligomer.
Claim 5
Dependent Claim
37 words
An epoxy resin composition according to claim 1, wherein the amount of the reactive oligomer is 20 to 80% by weight relative to the total amount of the epoxy resin, the reactive oligomer and the epoxy-curing agent.
Claim 6
Dependent Claim
18 words
An epoxy resin composition according to claim 3, wherein the epoxy resin is an glycidyl amine epoxy resin.
Claim 7
Dependent Claim
18 words
An epoxy resin composition according to claim 4, wherein the epoxy resin is an glycidyl amine epoxy resin.
Claim 8
Dependent Claim
16 words
An epoxy resin composition according to claim 4, wherein the epoxy-curing agent is an aromatic amine.
Claim 9
Dependent Claim
16 words
An epoxy resin composition according to claim 6, wherein the epoxy-curing agent is an aromatic amine.
Claim 10
Dependent Claim
18 words
An epoxy resin composition according to claim 3, wherein the epoxy resin is an epoxidized novolak epoxy resin.
Claim 11
Dependent Claim
18 words
An epoxy resin composition according to claim 4, wherein the epoxy resin is an epoxidized novolak epoxy resin.
Claim 12
Dependent Claim
22 words
An epoxy resin composition according to claim 10, wherein the epoxy-curin agent is a phenol novolak resin or a cresol novolak resin.
Claim 13
Dependent Claim
22 words
An epoxy resin composition according to claim 3, wherein the reactive oligomer is one having --SO 2 -- linkage in the molecule.
Claim 14
Dependent Claim
22 words
An epoxy resin composition according to claim 5, wherein the reactive oligomer is one having --SO 2 -- linkage in the molecule.
Claim 15
Dependent Claim
22 words
An epoxy resin composition according to claim 8, wherein the reactive oligomer is one having --SO 2 -- linkage in the molecule.
Claim 16
Dependent Claim
22 words
An epoxy resin composition according to claim 9, wherein the reactive oligomer is one having --SO 2 -- linkage in the molecule.
Claim 17
Dependent Claim
22 words
An epoxy resin composition according to claim 11, wherein the reactive oligomer is one having --SO 2 -- linkage in the molecule.
Claim 18
Dependent Claim
12 words
A semiconductor sealed by the epoxy resin composition according to claim 1.
Claim 19
Dependent Claim
35 words
A composition material obtained by reinforcing the epoxy resin composition according to claim 1, with at least one fiber selected from the group consisting of carbon fibers, alumina fibers, silicon carbide fibers and aramide fibers.
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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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |