US4492785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water soluble block polymers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1982-12-29
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Granted: 1985-01-08
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Expires: 2002-12-29
Abstract
Abstract The present invention relates to viscosification agents for water which are diblock polymers of t-butylstyrene/metal styrene sulfonate and triblock polymers of t-butylstyrene/metal styrene sulfonate/t-butylstyrene.
Inventors
- 👤 Paul L. Valint, Jr.
- 👤 Jan Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:19
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/02; C08F8/00; C08F8/44; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
A water soluble diblock polymer having the formula: ##STR3## wherein m is about 0.5 to about 15.0 mole %, n is about 85.0 to about 99.5 mole %, and M is selected from the group consisting of hydrogen, and metal ions of iron, aluminum, lead, and Groups IA, IIA, IB and IIB of the Periodic Table of Elements.
Claim 2
Dependent Claim
58 words
A water soluble diblock polymer having the formula: ##STR3## wherein m is about 0.5 to about 15.0 mole %, n is about 85.0 to about 99.5 mole %, and M is selected from the group consisting of hydrogen, and metal ions of iron, aluminum, lead, and Groups IA, IIA, IB and IIB of the Periodic Table of Elements.
Claim 3
Dependent Claim
11 words
A diblock polymer according to claim 1 wherein M is sodium.
Claim 4
Dependent Claim
11 words
A diblock polymer according to claim 1 which is water soluble.
Claim 5
Dependent Claim
51 words
A diblock polymer according to claim 1 said diblock polymer being dissolved in water to form a solution, said solution having a viscosity of about 5 cP to about 1000 cP at a concentration level of about 0.005 to about 5.0 grams of said diblock polymer per 100 grams of water.
Claim 6
Dependent Claim
58 words
A water soluble triblock polymer having the formula: ##STR4## wherein m is about 0.25 to about 7.5 mole %, n is about 85.0 to about 99.5 mole %, and M is selected from the group consisting of hydrogen, and metal ions of iron, aluminum, lead, and Groups IA, IIA, IB and IIB of the Periodic Table of Elements.
Claim 7
Dependent Claim
58 words
A water soluble triblock polymer having the formula: ##STR4## wherein m is about 0.25 to about 7.5 mole %, n is about 85.0 to about 99.5 mole %, and M is selected from the group consisting of hydrogen, and metal ions of iron, aluminum, lead, and Groups IA, IIA, IB and IIB of the Periodic Table of Elements.
Claim 8
Dependent Claim
11 words
A triblock polymer according to claim 5 wherein M is sodium.
Claim 9
Dependent Claim
11 words
A triblock polymer according to claim 5 which is water soluble.
Claim 10
Dependent Claim
51 words
A triblock polymer according to claim 5, said triblock polymer being dissolved in water to form a solution, said solution having a viscosity of about 5 cP to about 1000 cP at a concentration level of about 0.005 to about 5 grams of said triblock polymer per 100 grams of water.
References Cited (Backward Citations)
US3231635A
Cited
US3925280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |