US3755236A
Expired / Lapsed
US
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Copolymers of vinylsulfonic acid salts and allylsulfonic acid salts
Assignee: Sybron Transition Corp
•
Filing: 1971-12-10
•
Granted: 1973-08-28
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Expires: 1991-12-10
Abstract
Abstract New copolymers have been prepared from the salts of ethenesulfonic acid and the salts of 2-propene-1-sulfonic acid by solution polymerization methods such as batch or delay. The copolymers have been found useful as dispersants for the clays used in paper coating and in latex stabilization.
Inventors
- 👤 J Puskas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:07
CPC Classifications
C; C08; C08F; C08F28/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
19 words
The composition of claim 1 wherein the weight ratio of x to y is between about 40:60 and 60:40.
Claim 2
Dependent Claim
35 words
The composition of claim 1 wherein the alkali metal is selected from the group consisting of sodium and potassium and the alkaline earth metal is selected from the group consisting of barium, magnesium and calcium.
Claim 3
Dependent Claim
8 words
Aqueous solution of the copolymers of claim 1.
Claim 4
Dependent Claim
86 words
A water-soluble copolymer consisting essentially of salts of vinylsulfonic acid, said salts being selected from the group consisting of the alkali metal salts, the alkaline earth metal salts, the ammonium salt and mixtures thereof, and salts of allylsulfonic acid, said salts being selected from the group consisting of the alkali metal salts, the alkaline earth metal salts, the ammonium salt and mixtures thereof, in which the weight ratio of the salts of vinylsulfonic acid and the salts of allylsulfonic acid is between about 95:5 and 25:75.
Claim 5
Dependent Claim
27 words
The copolymer of claim 5 wherein the weight ratio of the salts of vinylsulfonic acid and the salts of allylsulfonic acid is between about 40:60 and 60:40.
Claim 6
Dependent Claim
37 words
The copolymer of claim 5 wherein the alkali metal salt is selected from the group consisting of sodium and potassium and the alkaline earth metal salt is selected from the group consisting of barium, magnesium and calcium.
Claim 7
Dependent Claim
8 words
Aqueous solution of the copolymers of claim 5.
Claim 8
Dependent Claim
28 words
The aqueous solution of claim 8 wherein the weight ratio of the salts of vinylsulfonic acid and the salts of 40:60 acid is between about 40:60 and 60:40.
Claim 9
Dependent Claim
38 words
The aqueous solution of claim 8 wherein the alkali metal salt is selected from the group consisting of sodium and potassium, and the alkaline earth metal salt is selected from the group consisting of barium, magnesium and calcium.
References Cited (Backward Citations)
DE842048C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |