Patent US4352920A successfully refreshed from Google Patents.
US4352920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin compositions
Assignee: Milliken Research Corp
•
Filing: 1981-02-02
•
Granted: 1982-10-05
•
Expires: 2001-02-02
Abstract
Abstract Epoxy resin compositions are provided containing aminoalkoxy compounds of the formula: ##STR1## wherein R 1 and R 2 are selected from H and ##STR2## and R 3 , R 4 and R 5 are all independently selected from H and a lower alkyl group having from 1 to about 6 carbon atoms. Also provided are methods for curing epoxy resins where aminoalkoxy curing agents may be employed.
Inventors
- 👤 Edward W. Kluger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:33
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/64; C08G59/50; C08G59/504
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
An epoxy resin composition comprising an epoxy resin and at least one epoxy resin curing agent of the formula: ##STR14## wherein R 1 and R 2 are selected from H or ##STR15## and R 3 , R 4 or R 5 are all independently selected from H and a lower alkyl group having from 1 to about 6 carbon atoms.
Claim 2
Dependent Claim
60 words
An epoxy resin composition comprising an epoxy resin and at least one epoxy resin curing agent of the formula: ##STR14## wherein R 1 and R 2 are selected from H or ##STR15## and R 3 , R 4 or R 5 are all independently selected from H and a lower alkyl group having from 1 to about 6 carbon atoms.
Claim 3
Dependent Claim
14 words
The epoxy resin composition of claim 1, wherein said ##STR16## groups are terminal groups.
Claim 4
Dependent Claim
17 words
The epoxy resin composition of claim 2, wherein said epoxy resin is a diglycidyl ether of bis-phenol.
Claim 5
Dependent Claim
32 words
The epoxy resin composition of claim 1, wherein said epoxy resin curing agent is represented by the formula set forth in claim 3 and wherein R 1 and R 2 are ##STR17##
Claim 6
Dependent Claim
12 words
The epoxy resin composition of claim 4, wherein R 3 is H.
Claim 7
Dependent Claim
88 words
In a method for curing an epoxy resin composition comprising incorporating an epoxy resin curing agent into an epoxy resin and heating the combination of the epoxy resin and the epoxy curing agent, the improvement which comprises said epoxy resin curing agent being represented by the formula: ##STR18## wherein R 1 and R 2 are selected from H or ##STR19## and R 3 , R 4 or R 5 are all independently selected from H and a lower alkyl group having from 1 to about 6 carbon atoms.
Claim 8
Dependent Claim
88 words
In a method for curing an epoxy resin composition comprising incorporating an epoxy resin curing agent into an epoxy resin and heating the combination of the epoxy resin and the epoxy curing agent, the improvement which comprises said epoxy resin curing agent being represented by the formula: ##STR18## wherein R 1 and R 2 are selected from H or ##STR19## and R 3 , R 4 or R 5 are all independently selected from H and a lower alkyl group having from 1 to about 6 carbon atoms.
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) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |