US5134239A
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Latent catalysts for epoxy-phenolic reactions
Assignee: Dow Chemical Co
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Filing: 1990-07-18
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Granted: 1992-07-28
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Expires: 2010-07-18
Abstract
Abstract Latent catalyst compounds for catalyzing the reaction between epoxide groups and aromatic hydroxyl groups are prepared by contacting a nitrogen-containing heterocyclic compound with an acid having a weak nucleophilic anion.
Inventors
- 👤 James L. Bertram
- 👤 Louis L. Walker
- 👤 John W. Muskopf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:05
CPC Classifications
C; C08; C08G; C08G59/00; B; B29; B29C; B29C67/00; B29C67/24; B29C67/246; C08G59/02; C08G59/04; C08G59/06; C08G59/066; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/68
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
73 words
An indolazinonium compound represented by the following formula XXI ##STR59## wherein each R a , R b , R c , R d , R e , R f and R g is independently hydrogen or a hydrocarbyl group having from 1 to about 18 carbon atoms or such hydrocarbyl groups containing an oxygen, sulfur, cyano or halogen substituent; and X is the anion portion of an acid having a weak nucleophilic anion.
Claim 2
Dependent Claim
73 words
An indolazinonium compound represented by the following formula XXI ##STR59## wherein each R a , R b , R c , R d , R e , R f and R g is independently hydrogen or a hydrocarbyl group having from 1 to about 18 carbon atoms or such hydrocarbyl groups containing an oxygen, sulfur, cyano or halogen substituent; and X is the anion portion of an acid having a weak nucleophilic anion.
Claim 3
Dependent Claim
86 words
An indolazinonium compound of claim 1 wherein each R a , R b , R c , R d , R e , R f and R g is independently hydrogen or a hydrocarbyl group having from 1 to about 9 carbon atoms or such hydrocarbyl groups containing a chloro, bromo or cyano substituent; and X is the anion portion of fluoboric acid, fluoarsenic acid, fluoantimonic acid, fluophosphoric acid, chloroboric acid, chloroarsenic acid, chloroantimonic acid, chloro-phosphoric acid, perchloric acid, chloric acid, bromic acid, or iodic acid.
Claim 4
Dependent Claim
42 words
The product of claim 1 wherein each R a , R b , R c , R d , R e , R f and R g is independently hydrogen, or a hydrocarbyl group having from 1 to about 9, carbon atoms.
Claim 5
Dependent Claim
27 words
The product of claim 3 wherein said indolazine compound is indolazine, 1-methylindolizine, 2-methylindolizine, 3-butylindolizine, 5-methyl-1-propylindolizine, 2-ethyl-1-methyl-indolizine, 6-(3-hydroxypropyl)indolizine, 3-phenylindolizine, 7-benzylindolizine, 2-phenyl-3-methylindolizine, 5-cyanoindolizine, 7-chloroindolizine, 3-bromo-5-methylindolizine, or any combination thereof.
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) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |