US4824916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble, crosslinked, sulfonated aromatic polyamide
Assignee: CYNARA COMPANY
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Filing: 1986-07-14
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Granted: 1989-04-25
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Expires: 2006-07-14
Abstract
Abstract Novel sulfonated polyamide and polyurea materials are described. The polymers are water-soluble or water-dispersible, if not crosslinked. The polymers can be crosslinked with polyvalent cations or crosslinking agents. The polymers have utility as membranes, thickeners, coatings and adhesives.
Inventors
- 👤 Larry D. Kershner
- 👤 Charles E. Reineke
- 👤 Nitis Sarkar
- 👤 Larry R. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/885; B; B01; B01D; B01D69/00; B01D69/12; B01D69/125; B01D69/1251; B01D71/00; B01D71/06; B01D71/54; B01D71/56; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/48; C08G71/00; C08G71/02; C10; C10M; C10M173/00; C10M173/02; C10M2201/00; C10M2201/02; C10M2221/00; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
A polymer comprising recurring units corresponding to Formula I: ##STR11## wherein y, at each occurrence, is independently a compatible substituent, M + , at each occurrence, is a compatible cation, R 2 at each occurrence is a covalent bond, or R 2 is hydrocarbylene or inertly substituted hydrocarylene; and Z at each occurrence is independently ##STR12## and R 1 at each occurrence is independently hydrocarbylene or an inertly substituted hydrocarbylene, wherein the ploymer comprises an effective number of crosslinking groups so as to render the polymer normally insoluble in water and wherein the polymer would be water-soluble or water dispersible to the extent of at least about 1 weight percent polymer at 20° C., if the polymer were not crosslinked.
Claim 2
Dependent Claim
120 words
A polymer comprising recurring units corresponding to Formula I: ##STR11## wherein y, at each occurrence, is independently a compatible substituent, M + , at each occurrence, is a compatible cation, R 2 at each occurrence is a covalent bond, or R 2 is hydrocarbylene or inertly substituted hydrocarylene; and Z at each occurrence is independently ##STR12## and R 1 at each occurrence is independently hydrocarbylene or an inertly substituted hydrocarbylene, wherein the ploymer comprises an effective number of crosslinking groups so as to render the polymer normally insoluble in water and wherein the polymer would be water-soluble or water dispersible to the extent of at least about 1 weight percent polymer at 20° C., if the polymer were not crosslinked.
Claim 3
Dependent Claim
23 words
The polymer as described in claim 1 wherein the polymer bears at least about 25 percent of --SO 3 H equivalents by weight.
Claim 4
Dependent Claim
17 words
The polymer as described in claim 1 wherein Z is ##STR13## and R' is an aromatic hydrocarbylene.
Claim 5
Dependent Claim
14 words
The polymer as described in claim 1 wherein M + is Na + .
Claim 6
Dependent Claim
18 words
The polymer as described in claim 1 wherein Y is hydrogen and R 2 is a covalent bond.
Claim 7
Dependent Claim
14 words
The polymer as described in claim 1 wherein the crosslinking groups are polyvalent cations.
Claim 8
Dependent Claim
13 words
The polymer as described in claim 6 wherein the polyvalent cations are Ba++.
Claim 9
Dependent Claim
12 words
The polymer of claim 1 comprising recurring units of the formula: ##STR14##
Claim 10
Dependent Claim
24 words
The polymer of claim 1 wherein the sulfonate groups are in positions meta relative to the amide or amine groups in the polymer backbone.
Claim 11
Dependent Claim
27 words
The polymer of claim 1 wherein the polymer of this invention prior to crosslinking is soluble in a concentration of at least 15 weight percent in water.
Claim 12
Dependent Claim
20 words
The polymer of claim 1 wherein the polymer bears at least about 30 percent --SO 3 H equivalents by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |