US4663401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin composition
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1985-05-02
•
Granted: 1987-05-05
•
Expires: 2005-05-02
Abstract
Abstract A thermosettable epoxy resin composition comprising 100 parts by weight of an epoxy resin, 5 to 40 parts by weight of polysulfone resin having both a resorcinol moiety and 4,4'-dichlorodiphenylsulfone moiety in the molecular chain, and an effective amount of a curing agent, which gives a cured product excellent in toughness as well as in curability, adhesion, mechanical strength at high temperatures and resistance to chemicals.
Inventors
- 👤 Yasuhisa Saito
- 👤 Akira Morii
- 👤 Hiroshi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:56
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08L; C08L63/00; Y; Y10; Y10S; Y10S525/00; Y10S525/906
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
47 words
A thermosettable epoxy resin composition comprising: (1) an epoxy resin, (2) a polysulfone resin represented by the following formula, ##STR8## wherein Ar is a divalent aromatic group, 50-100 mole % of Ar is a 1,3-phenylene group and m is a positive number, and (3) a curing agent.
Claim 2
Dependent Claim
47 words
A thermosettable epoxy resin composition comprising: (1) an epoxy resin, (2) a polysulfone resin represented by the following formula, ##STR8## wherein Ar is a divalent aromatic group, 50-100 mole % of Ar is a 1,3-phenylene group and m is a positive number, and (3) a curing agent.
Claim 3
Dependent Claim
66 words
A thermosettable epoxy resin composition according to claim 1, wherein the epoxy resin is at least one member selected from the group consisting of polyglycidyl ethers derivable from dihydric phenols, polyhydric phenols or halogenated dihydric phenols, novolak epoxy resins, aromatic amine epoxy resins, alicyclic amine epoxy resins, aromatic carboxylic epoxy resins, hydantoin epoxy resins, alicyclic epoxy resins, triglycidylisocyanurate, 2,4,6-triglycidoxy-s-triazine, and their rubber or urethane modified products.
Claim 4
Dependent Claim
23 words
A thermosettable epoxy resin composition according to claim 1, wherein the polysulfone resin has a molecular weight of about 15,000 to about 90,000.
Claim 5
Dependent Claim
42 words
A thermosettable epoxy resin composition according to claim 1, wherein the divalent group is formed by taking 1,3-phenylene together with at least one member selected from the group consisting of ##STR9## each benzene nucleus being unsubstituted or substituted with methyl or ethyl.
Claim 6
Dependent Claim
20 words
A thermosettable epoxy resin composition according to claim 1, wherein the curing agent is dicyandiamine or or an aromatic amine.
Claim 7
Dependent Claim
51 words
A thermosettable epoxy resin composition according to claim 5, wherein the aromatic amine is at least one member selected from the group consisting of 4,4'-diaminodiphenylsulfone, 3,3'-diaminodiphenylsulfone, 4,4'-diaminodiphenylmethane, 4,4'-diaminodiphenylether, m-phenylenediamine, p-phenylenediamine, 4,4'-methylene-bis-o-chloroaniline, tetrachlorodiaminodiphenylmethane, 4,4'-diaminostilben, 4,4'-diaminodiphenylsulfide, m-xylylenediamine, p-oylylenediamine, 1,4-bis(4-aminophenoxy)benzene, 1,4-bis(3-aminophenoxy)benzene, 1,3-bis(4-aminophenoxy)benzene, 1,3-bis(3-aminophenoxy)benzene, 2,2-bis(4-aminophenoxyphenyl)propane, 4,4'-bis(4-aminophenoxy)diphenylsulfone, 4,4'-bis(3-aminophenoxy)diphenylsulfone, 4,4'-bis(4-aminophenoxy)diphenylsulfide, 3,3'-diaminodiphenylmethane, 3,4'-diaminodiphenylether, 2,4-toluenediamine, 2,6-toluenediamine, 5-amino-1-(4'-aminophenyl)-1,3,3-trimethylindane, and 6-amino-1-(4'-aminophenyl)-1,3,3-trimethylindane.
Claim 8
Dependent Claim
30 words
A thermosettable epoxy resin composition according to claim 1, wherein the composition further comprises at least one additive selected from the group consisting of curing accelerators, extenders, fillers and pigments.
References Cited (Backward Citations)
US3530087A
Cited
US3663507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |