US4855386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing agents for epoxy resins comprising diamines with the di(p-aminophenyl)-diisopropyl benzene structure
Assignee: Resolution Performance Products LLC
•
Filing: 1987-12-31
•
Granted: 1989-08-08
•
Expires: 2007-12-31
Abstract
Abstract A composition is provided comprising an epoxy resin and an aromatic amine curing agent, the latter which can be described by the formula ##STR1## in which each R is selected C 2 -C 7 alkyl and each R' is selected from C 1 -C 7 alkyl. The described composition has good physical properties for high-performance composite applications and has a relatively long working life.
Inventors
- 👤 Ronald S. Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:50
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/20; C08G59/32; C08G59/3227; C07; C07C; C07C211/00; C07C211/43; C07C211/44; C07C211/49; C07C211/50; C07D; C07D303/00; C07D303/02; C07D303/36; C08G59/22; C08G59/28; C08G59/5033
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
39 words
A composition comprising (a) an epoxy resin and (b) a curing amount of an aromatic amine which can be represented by the formula ##STR10## in which each R is ethyl and each R' is selected from methyl and ethyl.
Claim 2
Dependent Claim
39 words
A composition comprising (a) an epoxy resin and (b) a curing amount of an aromatic amine which can be represented by the formula ##STR10## in which each R is ethyl and each R' is selected from methyl and ethyl.
Claim 3
Dependent Claim
17 words
The composition of claim 1 in which the aromatic amine is a mixture of α,α'-bis(3,5-diethyl-4-aminophenyl)-p-diisopropylbenzene and α,α'-bis(3-ethyl-5-methyl-4-aminophenyl)-p-diisopropylbenzene.
Claim 4
Dependent Claim
34 words
The composition of claim 1 in which the aromatic amine is present in the composition in an amount of from about 20 to about 50 weight percent, based on the weight of the composition.
Claim 5
Dependent Claim
12 words
The composition of claim 1 which further comprises a fibrous reinforcing agent.
Claim 6
Dependent Claim
68 words
The composition of claim 1 in which the epoxy resin is a glycidated amine which can be represented by the formula ##STR11## in which each R" is selected independently from H, C 1 -C 10 alkyl and halides each R'" is selected from H, CH 3 , and CH 2 CH 3 and glycidyl, with the proviso that at least one R'" at each N site is ##STR12##
Claim 7
Dependent Claim
24 words
The composition of claim 4 in which the fibrous reinforcing agent is selected from the group consisting of glass fibers, carbon fibers, and Kevlar.
Claim 8
Dependent Claim
24 words
The composition of claim 5 which further comprises at least one component selected from the group consisting of a bismaleimide and a functionalized elastomer.
Claim 9
Dependent Claim
8 words
A prepreg comprising the composition of claim 1.
Claim 10
Dependent Claim
9 words
A molded article comprising the composition of claim 1.
References Cited (Backward Citations)
US3200152A
Cited
US3424795A
Cited
US3427282A
Cited
US3481900A
Cited
US3560443A
Cited
US4686250A
Cited
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 |