Patent US4304702A successfully refreshed from Google Patents.
US4304702A
Expired / Lapsed
US
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Process for controlled gelation of polymeric solution
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1980-04-03
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Granted: 1981-12-08
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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 amine neutralized sulfonated polymer in a solvent to form a polymeric solution, a concentration of the amine 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 1 to about 500 vol. % of an inorganic base solution to the polymeric solution having a viscosity less than about 20,000 cps, the water of the inorganic base solution being immiscible with the solvent and the polymeric solution, the viscosity of said polymeric solution increasing rapidly upon the addition of said inorganic base solution from less than 20,000 cps to greater than 50,000 cps.
Inventors
- 👤 Henry S. Makowski, deceased
- 👤 Robert D. Lundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:06
CPC Classifications
C; C08; C08F; C08F8/00; Y; Y10; Y10S; Y10S524/00; Y10S524/916
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
114 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 amine neutralized sulfonated polymer in a solvent to form a polymeric solution, a concentration of said amine 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 1 to about 500 vol. % of an inorganic base solution to said polymeric solution, the viscosity of said polymeric solution increasing upon the addition of said inorganic base solution from less than 20,000 cps to greater than 50,000 cps.
Claim 2
Dependent Claim
114 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 amine neutralized sulfonated polymer in a solvent to form a polymeric solution, a concentration of said amine 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 1 to about 500 vol. % of an inorganic base solution to said polymeric solution, the viscosity of said polymeric solution increasing upon the addition of said inorganic base solution from less than 20,000 cps to greater than 50,000 cps.
Claim 3
Dependent Claim
30 words
A process according to claim 1, further including heating said mixture of solutions to a temperature below the boiling point of said organic liquid thereby increasing the cation exchange rate.
Claim 4
Dependent Claim
11 words
The water insoluble gel prepared by the process of claim 2.
Claim 5
Dependent Claim
23 words
A process according to claim 1, including the inorganic base dissolved in water providing a mixture having a viscosity greater than 50,000 cps.
Claim 6
Dependent Claim
11 words
The water insoluble gel prepared by the process of claim 1.
Claim 7
Dependent Claim
11 words
The water insoluble gel prepared by the process of claim 4.
Claim 8
Dependent Claim
59 words
A process according to claim 4, 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 inorganic base solution to said solution having a viscosity less than about 20,000 cps.
Claim 9
Dependent Claim
11 words
The water insoluble gel prepared by the process of claim 7.
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
27 words
A process according to claim 1, wherein said neutralized sulfonated polymer has about 10 to about 300 meq. of pendant sulfonate groups per 100 grams of polymer.
Claim 13
Dependent Claim
16 words
A process according to claim 11, wherein said sulfonate groups are neutralized with an amine counterion.
Claim 14
Dependent Claim
16 words
A process according to claim 12, wherein said amine is a primary, secondary or tertiary amine.
Claim 15
Dependent Claim
13 words
A process according to claim 12, wherein said amine is a tertiary amine.
Claim 16
Dependent Claim
13 words
A process according to claim 12, wherein said amine is a secondary amine.
Claim 17
Dependent Claim
19 words
A process according to claim 12, wherein said SO 3 H groups are at least 90 mole % neutralized.
Claim 18
Dependent Claim
17 words
A process according to claim 1, wherein said neutralized sulfonated polymer is formed from an elastomeric polymer.
Claim 19
Dependent Claim
22 words
A process according to claim 17, wherein said elastomeric polymer is selected from the group consisting of EPDM terpolymer and butyl rubber.
Claim 20
Dependent Claim
16 words
A process according to claim 1, wherein said neutralized sulfonated polymer is formed from a thermoplastic.
Claim 21
Dependent Claim
25 words
A process according to claim 19, wherein said thermoplastic is selected from the group consisting of polystyrene, t-butyl styrene, and copolymers containing vinyl aromatic groups.
Claim 22
Dependent Claim
17 words
A process according to claim 1, wherein said neutralized sulfonated polymer further includes a filler admixed therewith.
Claim 23
Dependent Claim
18 words
A process according to claim 1, wherein said neutralized sulfonated polymer further includes a polymeric substance admixed therewith.
Claim 24
Dependent Claim
37 words
A process according to claim 1, wherein said organic liquid is selected from the group consisting of aromatic hydrocarbons, ketones, chlorinated aliphatic hydrocarbons, aliphatic hydrocarbons, cyclic aliphatic ethers, aliphatic ethers and organic aliphatic esters and mixtures thereof.
Claim 25
Dependent Claim
26 words
A process according to claim 1, wherein said organic liquid is selected from the group consisting of aliphatic hydrocarbons, diesel fuels, paraffinic oils and aromatic hydrocarbons.
Claim 26
Dependent Claim
26 words
A process according to claim 1, wherein said organic liquid is selected from the group including benzene, toluene, ethyl benzene, xylene and styrene and mixtures thereof.
Claim 27
Dependent Claim
15 words
A process according to claim 25, wherein said neutralized sulfonated polymer is formed from polystyrene.
Claim 28
Dependent Claim
11 words
The water insoluble gel prepared by the process of claim 26.
Claim 29
Dependent Claim
28 words
The process of claim 1 where the viscosity of the solution is less than 20,000 cps and increases with inorganic base solution addition to greater than 500,000 cps.
Claim 30
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.
Claim 31
Dependent Claim
41 words
A process according to claim 1 or 13, wherein said inorganic base solution is formed from a Group IA and IIA metal hydroxide and a Group IA, IIA, IB, IIB, nickel, iron, lead and metal salt of a weak carboxylic acid.
References Cited (Backward Citations)
US2809959A
Cited
US2813087A
Cited
US3554287A
Cited
US3870841A
Cited
US4157432A
Cited
US4226751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |