US4036808A
Expired / Lapsed
US
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Conductive hydrogel containing 3-ionene
Assignee: California Institute of Technology
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Filing: 1973-12-26
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Granted: 1977-07-19
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Expires: 1993-12-26
Abstract
Abstract Cationic polyelectrolytes formed by the polymerization in absence of oxygen of a monomer of the general formula: dispersed ##STR1## where x is 3 or more than 6 and Z is I, Br or Cl to form high charge density linear polymers are dispered in a water-soluble polymer such as polyvinyl alcohol to form a conductive hydrogel.
Inventors
- 👤 Alan Rembaum
- 👤 Shiao-Ping Siao Yen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:41
CPC Classifications
C; C08; C08G; C08G81/00; B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J37/00; B01J37/0009; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08F; C08F8/00; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/0226; B01J31/0234; B01J31/0235; B01J31/0239
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A conductive composition consisting essentially of a dispersion of 20 to 95 percent by weight of a water-soluble gel forming binder polymer selected from polyvinyl alcohol or polyvinyl alcohol cross-linked to a water-insoluble and water-swellable form by reaction with a coreactive water-soluble polymer and a linear, water-soluble polyelectrolyte of the formula: ##STR16## where Z is chloro, bromo or iodo and n is an integer such that the intrinsic viscosity, n, as determined by light scattering in 0.4 KBr is at least 0.2 dl/g as determined by the formula: n= (2.94 × 10 .sup..sup.-4) M.sup.0.61 where M is molecular weight.
Claim 2
Dependent Claim
99 words
A conductive composition consisting essentially of a dispersion of 20 to 95 percent by weight of a water-soluble gel forming binder polymer selected from polyvinyl alcohol or polyvinyl alcohol cross-linked to a water-insoluble and water-swellable form by reaction with a coreactive water-soluble polymer and a linear, water-soluble polyelectrolyte of the formula: ##STR16## where Z is chloro, bromo or iodo and n is an integer such that the intrinsic viscosity, n, as determined by light scattering in 0.4 KBr is at least 0.2 dl/g as determined by the formula: n= (2.94 × 10 .sup..sup.-4) M.sup.0.61 where M is molecular weight.
Claim 3
Dependent Claim
16 words
A composition according to claim 1 in which the water soluble binder polymer comprises polyvinyl alcohol.
Claim 4
Dependent Claim
22 words
A composition according to claim 1 in which the polyelectrolyte is present in an amount from 10-30 weight precent of the composition.
Claim 5
Dependent Claim
17 words
A composition according to claim 3 further including up to 50 weight percent of an inert filler.
Claim 6
Dependent Claim
17 words
A composition according to claim 4 in which the filler is a reprographic paper grade of clay.
Claim 7
Dependent Claim
11 words
A composition according to claim 1 in which Z is chloro.
Claim 8
Dependent Claim
18 words
A conductive composition according to claim 1 in which the coreactive polymers are polyvinyl alcohol and polyacrylic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |