Patent US4313862A successfully refreshed from Google Patents.
US4313862A
Expired / Lapsed
US
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Process for gelation of polymeric solution (C-1042)
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1980-04-03
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Granted: 1982-02-02
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Expires: 2000-04-03
Abstract
Abstract The present invention relates to a process for forming a polymeric solution or gel having a viscosity of at least about 50,000 cps which includes the steps of dissolving an unneutralized or neutralized sulfonated polymer in a solvent to form a solution, a concentration of the unneutralized or neutralized sulfonated polymer in the solution being about 0.1 to about 20 wt. %, a viscosity of the solution being less than about 20,000 cps; and adding about 5 to about 500 vol. % water to the solution having a viscosity less than about 20,000 cps, the water being immiscible with the solvent and the solution, the viscosity of said solution increasing rapidly upon the addition of said water from less than 20,000 cps to greater than 50,000 cps.
Inventors
- 👤 Robert D. Lundberg
- 👤 Henry S. Makowski
- 👤 Dennis O'Brien
- 👤 Robert R. Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:06
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/11; B; B01; B01J; B01J19/00; B01J19/06; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035; C08J2323/00; C08J2323/26; C08J2323/32
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
119 words
A process for forming a polymeric solution or water insoluble gel having a viscosity of at least about 50,000 cps which includes the steps of: (a) dissolving an unneutralized or neutralized sulfonated polymer in a solvent to form a solution, a concentration of said unneutralized or neutralized sulfonated polymer in said solution being about 0.1 to about 20 wt. %, a viscosity of said solution being less than about 20,000 cps; and (b) adding about 5 to about 500 volume % water to said solution, said water being immiscible with said solvent and said solution, the viscosity of said solution or suspension increasing upon the addition of said water from less than 20,000 cps to greater than 50,000 cps.
Claim 2
Dependent Claim
119 words
A process for forming a polymeric solution or water insoluble gel having a viscosity of at least about 50,000 cps which includes the steps of: (a) dissolving an unneutralized or neutralized sulfonated polymer in a solvent to form a solution, a concentration of said unneutralized or neutralized sulfonated polymer in said solution being about 0.1 to about 20 wt. %, a viscosity of said solution being less than about 20,000 cps; and (b) adding about 5 to about 500 volume % water to said solution, said water being immiscible with said solvent and said solution, the viscosity of said solution or suspension increasing upon the addition of said water from less than 20,000 cps to greater than 50,000 cps.
Claim 3
Dependent Claim
18 words
A process according to claim 1, wherein said organic liquid has a boiling point greater than said water.
Claim 4
Dependent Claim
57 words
A process according to claim 2, further including the step of heating said solution having a viscosity greater than 50,000 cps to a temperature greater than the boiling point of said water, but less than that of said organic liquid thereby isolating a water insoluble gel of said unneutralized or neutralized sulfonated polymer in said organic liquid.
Claim 5
Dependent Claim
41 words
A process according to claim 3, further including heating said gel to a temperature above the boiling point of said organic liquid thereby removing said organic liquid from said water insoluble gel to form a solid unneutralized or neutralized sulfonated polymer.
Claim 6
Dependent Claim
49 words
A process according to claim 3, further including the step of depositing said water insoluble gel on a substrate prior to heating said gel to said temperature above said boiling point of said organic liquid thereby forming a coating of said ununneutralized or neutralized sulfonated polymer on said substrate.
Claim 7
Dependent Claim
36 words
A process according to claim 1 further including the step of heating said solution and said water to a temperature above the boiling points of said water, and said organic liquid forming from neutralized sulfonated polymer.
Claim 8
Dependent Claim
41 words
A process according to claim 1, further including the step of separating said water from said solution having a viscosity greater than 50,000 cps thereby forming a water insoluble gel of said unneutralized or neutralized sulfonated polymer in said organic liquid.
Claim 9
Dependent Claim
58 words
A process according to claim 7, further including suspending an article in said solution having a viscosity less than about 20,000 cps, thereby permitting said water insoluble gel to be encapsulated within said substance having a viscosity greater than 50,000 cps upon the addition of said water to said solution having a viscosity less than about 20,000 cps.
Claim 10
Dependent Claim
28 words
A process according to claim 1, further including an article having an opening therein and forming said solution having a viscosity greater than 50,000 cps within said opening.
Claim 11
Dependent Claim
29 words
A process according to claim 1, further including an elongated member having a bore therein and forming said solution having a viscosity greater than 500,000 cps within said bore.
Claim 12
Dependent Claim
29 words
A process according to claim 1, wherein said neutralized sulfonated polymer has about 10 to about 200 meq. of pendant SO 3 H groups per 100 grams of polymer.
Claim 13
Dependent Claim
22 words
A process according to claim 11, wherein said SO 3 H are neutralized with an ammonium, zinc lead or amine salt counterion.
Claim 14
Dependent Claim
19 words
A process according to claim 12, wherein said SO 3 H groups are at least 90 mole % neutralized.
Claim 15
Dependent Claim
17 words
A process according to claim 1, wherein said neutralized sulfonated polymer is formed from an elastomeric polymer.
Claim 16
Dependent Claim
21 words
A process according to claim 14, wherein said elastomeric polymer is selected from the group including EPDM terpolymer and Butyl rubber.
Claim 17
Dependent Claim
16 words
A process according to claim 1, wherein said neutralized sulfonated polymer is formed from a thermoplastic.
Claim 18
Dependent Claim
26 words
A process according to claim 16, wherein said thermoplastic is selected from the group consisting of polystyrene, t-butyl styrene, ethylene copolymers, propylene copolymers, and styrene/acrylonitrile copolymer.
Claim 19
Dependent Claim
17 words
A process according to claim 1, wherein said neutralized sulfonated polymer further includes a filler admixed therewith.
Claim 20
Dependent Claim
18 words
A process according to claim 1, wherein said neutralized sulfonated polymer further includes a polymeric substance admixed therewith.
Claim 21
Dependent Claim
36 words
A process according to claim 1, wherein said organic liquid is selected from the group including aromatic hydrocarbons, ketones, chlorinated aliphatic hydrocarbons, aliphatic hydrocarbons, cyclic aliphatic ethers, aliphatic ethers and organic aliphatic esters and mixtures thereof.
Claim 22
Dependent Claim
26 words
A process according to claim 1, wherein said organic liquid is selected from the group consisting of diesel fuels, paraffinic oils, aliphatic hydrocarbons and aromatic hydrocarbons.
Claim 23
Dependent Claim
27 words
A process according to claim 1, wherein said organic liquid is selected from the group consisting of benzene, toluene, ethyl benzene, xylene and styrene and mixtures thereof.
Claim 24
Dependent Claim
15 words
A process according to claim 22, wherein said neutralized sulfonated polymer is formed from polystyrene.
Claim 25
Dependent Claim
26 words
The process of claim 1 where the viscosity of the solution is less than 20,000 cps and increases with water addition to greater than 500,000 cps.
Claim 26
Dependent Claim
24 words
A process according to claim 1, wherein said organic liquid is selected from the group consisting of oils which are predominantly paraffinic in composition.
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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) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |