Patent US3859264A successfully refreshed from Google Patents.
US3859264A
Expired / Lapsed
US
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Direct stabilization of sulfonated polymers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-09-02
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Granted: 1975-01-07
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Expires: 1990-09-02
Abstract
Abstract The acid form of any water-dispersible resin sulfonate can be stabilized by mixing into the reaction product slurry obtained by sulfonation of the polymer in dichloroethane or a similar liquid media a measured amount of a powdered base which, along with the sulfonated polymer, is insoluble in the liquid media. The insoluble acid-base mixture is thereafter filtered off and air dried. This method avoids the necessity of forming the neutralized sulfonic acid salt while affording a stable solid.
Inventors
- 👤 Jr George A Knudsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:33
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C02F1/5236; C08; C08K; C08K3/00; C08K3/10; C08K3/105
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A METHOD FOR STABILIZING WATER-DISPENSIBLE RESIN SULFONATES WHICH COMPRISES THE STEPS OF: A. PREPARING SLURRY OF THE RESIN SULFONIC ACID IN A NONREACTIVE SUSPENDING MEDIUM; B. ADDING TO SAID SLURRY A POWDERED BASE, SAID BASE BEING INSOLUBLE IN THE SUSPENDING MEDIUM; C. SEPARATING THE RESULTING INSOLUBLE MIXTURE OF SAID ACID AND BASE FROM THE SUSPENDING MEDIUM; AND D. DRYING THE ACID-BASE MIXTURE OBTAINED FROM STEP (C).
Claim 2
Independent Claim
66 words
A METHOD FOR STABILIZING WATER-DISPENSIBLE RESIN SULFONATES WHICH COMPRISES THE STEPS OF: A. PREPARING SLURRY OF THE RESIN SULFONIC ACID IN A NONREACTIVE SUSPENDING MEDIUM; B. ADDING TO SAID SLURRY A POWDERED BASE, SAID BASE BEING INSOLUBLE IN THE SUSPENDING MEDIUM; C. SEPARATING THE RESULTING INSOLUBLE MIXTURE OF SAID ACID AND BASE FROM THE SUSPENDING MEDIUM; AND D. DRYING THE ACID-BASE MIXTURE OBTAINED FROM STEP (C).
Claim 3
Dependent Claim
41 words
The method of claim 1 wherein sufficient base is added so that when the solid mixture obtained from step (d) is dissolved in water the pH level of the resulting solution is in the range of about 6 to about 9.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein the nonreactive liquid suspending medium is a chlorinated aliphatic hydrocarbon.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the water-dispersible resin sulfonate is sulfonated polystyrene.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein the solid mixture obtained from step (c) is air dried.
Claim 7
Dependent Claim
26 words
The method of claim 1 wherein the insoluble powdered base is selected from the group consisting of alkali and alkaline earth metal hydroxides, carbonates, and acetates.
Claim 8
Dependent Claim
11 words
A composition of matter prepared by the method of claim 1.
Claim 9
Dependent Claim
16 words
The composition of claim 7 wherein the water-dispersible resin sulfonate to be stabilized is sulfonated polystyrene.
References Cited (Backward Citations)
US2640820A
Cited
US2283236A
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US2394761A
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US2663700A
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US3218301A
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US3432480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |