Patent US4490487A successfully refreshed from Google Patents.
US4490487A
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SO3 /Imide adducts, process for their preparation and their use as sulphonating agents
Assignee: Bayer AG
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Filing: 1983-12-06
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Granted: 1984-12-25
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Expires: 2003-12-06
Abstract
Abstract The invention relates to SO 3 adducts with imides, which are sparingly soluble or insoluble in water, of the formula ##STR1## in which R 1 , R 2 and R have the meaning indicated in the description, a process for the preparation of the adducts and their use as sulphonating agents.
Inventors
- 👤 Kurt Halcour
- 👤 Peter-Michael Lange
- 👤 Rudolf Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:30
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/404; C07C; C07C303/00; C07C303/24; C07C303/32; C07D207/44; C07D207/444; C07D207/448; C07D209/00; C07D209/02; C07D209/44; C07D209/48
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
136 words
A SO 3 adduct with an imide, which is sparingly soluble or insoluble in water, of the formula ##STR6## in which R 1 and R 2 , independently of one another, are an optionally substituted phenyl radical, or together form an optionally substituted 1,2-phenylene radical, an alkylene radical of the formula --(CH 2 ) m --, in which m is 2,3 or 4, or an ethenylene radical of the formula ##STR7## in which R 3 and R 4 , independently of one another, are hydrogen, halogen or C 1 -C 4 -alkyl, or together form a 1,4-butylene radical; and R is an optionally substituted benzyl radical, which is bonded to a cross-linked polyethylene chain, the imide being an imidoalkylation product of a macroporous polystyrene bead polymer cross-linked with 3 to 12% by weight of cross-linking agent.
Claim 2
Dependent Claim
136 words
A SO 3 adduct with an imide, which is sparingly soluble or insoluble in water, of the formula ##STR6## in which R 1 and R 2 , independently of one another, are an optionally substituted phenyl radical, or together form an optionally substituted 1,2-phenylene radical, an alkylene radical of the formula --(CH 2 ) m --, in which m is 2,3 or 4, or an ethenylene radical of the formula ##STR7## in which R 3 and R 4 , independently of one another, are hydrogen, halogen or C 1 -C 4 -alkyl, or together form a 1,4-butylene radical; and R is an optionally substituted benzyl radical, which is bonded to a cross-linked polyethylene chain, the imide being an imidoalkylation product of a macroporous polystyrene bead polymer cross-linked with 3 to 12% by weight of cross-linking agent.
Claim 3
Dependent Claim
20 words
An adduct according to claim 1, in which R 1 and R 2 together form an optionally substituted 1,2-phenylene radical.
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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |