US3945973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N,N'-Diglycidyl-N,N'-dialkyl aryl disulfonamides
Assignee: Dow Chemical Co
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Filing: 1974-05-03
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Granted: 1976-03-23
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Expires: 1994-05-03
Abstract
Abstract N,N'-diglycidyl-N,N'-dialkyl aryl disulfonamides are prepared having an epoxy equivalent weight range from about 234 to about 1100. These polyepoxides are useful to make coated articles having superior solvent resistance and impact resistance when cured with conventional epoxy curing agents.
Inventors
- 👤 Harry A. Smith
- 👤 Edward G. Bozzi, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:55
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/302; C07; C07D; C07D303/00; C07D303/02; C07D303/36; C08G59/02; C08G75/00; C08G75/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
A polyepoxide represented by the formulae: ##EQU3## wherein Q is a divalent aromatic disulfonyl group selected from ##SPC5## where A is a divalent hydrocarbon group having from 1 to 6 carbon atoms, ##EQU4## m is 0 or 1 ##SPC6## where X is oxygen or sulfur and ##SPC7## wherein R 1 is an alkyl group having 1-6 carbons; R 2 is independently hydrogen, an aliphatic hydrocarbon group having 1-6 carbons, chlorine, bromine or --OR 3 where R 3 is an acyl group having 1-6 carbons; n is a whole number in the range 0-5.
Claim 2
Dependent Claim
93 words
A polyepoxide represented by the formulae: ##EQU3## wherein Q is a divalent aromatic disulfonyl group selected from ##SPC5## where A is a divalent hydrocarbon group having from 1 to 6 carbon atoms, ##EQU4## m is 0 or 1 ##SPC6## where X is oxygen or sulfur and ##SPC7## wherein R 1 is an alkyl group having 1-6 carbons; R 2 is independently hydrogen, an aliphatic hydrocarbon group having 1-6 carbons, chlorine, bromine or --OR 3 where R 3 is an acyl group having 1-6 carbons; n is a whole number in the range 0-5.
Claim 3
Dependent Claim
28 words
A polyepoxide as set forth in claim 1 wherein the polyepoxide has the formula I and has an epoxy equivalent weight range from about 234 to about 275.
Claim 4
Dependent Claim
28 words
A polyepoxide as set forth in claim 1 wherein the polyepoxide has the formula I and has an epoxy equivalent weight range from about 600 to about 1100.
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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |