US4607069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable compositions based on epoxy resins
Assignee: BASF SE
•
Filing: 1985-07-03
•
Granted: 1986-08-19
•
Expires: 2005-07-03
Abstract
Abstract A solvent-free curable composition has a long shelf life and consists of A 100 parts by weight of an epoxy resin and B from 10 to 100 parts by weight of, as a curing agent for the epoxy resin, an aromatic diamine containing <IMAGE> groups, with or without C from 0.01 to 5 parts by weight of an accelerator, the curing agent for the epoxy resin being finely dispersed in the latter and preferably having a particle size of less than 10 mu m. The preferred epoxy resin curing agent is 4,4'-diaminodiphenyl ketone. The curable composition is used in particular for the preparation of fiber-reinforced materials.
Inventors
- 👤 Helmut Tesch
- 👤 Manfred Heym
- 👤 Walter Doerflinger
- 👤 Herbert Stutz
- 👤 Peter Neumann
- 👤 Dietmar Nissen
- 👤 Gerhard Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:36
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5033; C08J2363/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
An essentially solvent-free curable composition which has a long shelf life and consists of A 100 parts by weight of an epoxy resin and B from 10 to 100 parts by weight of, as a curing agent for the epoxy resin, an aromatic diamine containing ##STR6## groups, with or without C from 0.01 to 5 parts by weight of an accelerator, wherein the curing agent for the epoxy resin is finely dispersed in the latter.
Claim 2
Dependent Claim
75 words
An essentially solvent-free curable composition which has a long shelf life and consists of A 100 parts by weight of an epoxy resin and B from 10 to 100 parts by weight of, as a curing agent for the epoxy resin, an aromatic diamine containing ##STR6## groups, with or without C from 0.01 to 5 parts by weight of an accelerator, wherein the curing agent for the epoxy resin is finely dispersed in the latter.
Claim 3
Dependent Claim
35 words
A curable composition as claimed in claim 1, wherein not less than 90% by volume of the particles of the curing agent for the epoxy resin have a particle size of less than 10 um.
Claim 4
Dependent Claim
22 words
A curable composition as claimed in claim 1, wherein the epoxy resin curing agent used is a diamine of the formula ##STR7##
Claim 5
Dependent Claim
18 words
A curable composition as claimed in claim 1, wherein the epoxy resin curing agent used is 4,4'-diaminodiphenyl ketone.
Claim 6
Dependent Claim
37 words
A process for the preparation of a fiber-reinforced material by impregnation of from 70 to 30% by volume of reinforcing fibers with from 30 to 70% by volume of a curable composition as claimed in claim 1.
References Cited (Backward Citations)
US3288753A
Cited
US3996175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |