Patent US3932181A successfully refreshed from Google Patents.
US3932181A
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US
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Electrophotographic coating compositions having bromine-containing polymer binders
Assignee: Ingredion Inc
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Filing: 1974-07-01
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Granted: 1976-01-13
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Expires: 1994-07-01
Abstract
Abstract Photoconductive coating compositions for application to solid substrates which are to be utilized in electrophotographic operations are described; the resultant photoconductive coatings comprise a layer of photoconductive pigment particles bonded to themselves and to the solid substrate with a binder comprising a novel interpolymer, at least one of whose constituent monomers contains bromine. Novel bromine-containing monomers are also disclosed.
Inventors
- 👤 Dilip K. Ray-Chaudhuri
- 👤 Paul C. Georgoudis
- 👤 Hans H. Stockmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:30
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/05; G03G5/0528; G03G5/0589
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
189 words
A photoconductive composition comprising a finely divided photoconductive pigment selected from at least one member of the group consisting of zinc oxide, titanium dioxide, selenium oxide and zinc sulfide dispersed in a bromine-containing interpolymer consisting essentially of repeating units derived from at least one bromine-containing monomer corresponding to the general formulas: ##EQU5## wherein: R.sub.1 = H, or -CH.sub.3, R.sub.2 = alkyl radical having 1 to 4 carbon atoms, R.sub.3 = H, CH.sub.3, or --CH.sub.2 Br, ##EQU6## R.sub.6 = H or Br and at least one monomer which does not contain bromine selected from the group consisting of compounds corresponding to the general formulas ##EQU7## wherein: R 1 = H or --CH 3 , R 4 = h, cl, or t-butyl, R 5 = an alkyl radical of 1 to 8 carbon atoms or a cycloalkyl radical of 3 to 8 carbon atoms, and Z = h or -- COO -- R 5 wherein the interpolymer contains from 0.01 to 0.35 mole of bromine-containing monomer per mole of total monomers and wherein the ratio of pigment to interpolymer is in the range of from about 2:1 to 12:1 by weight.
Claim 2
Dependent Claim
189 words
A photoconductive composition comprising a finely divided photoconductive pigment selected from at least one member of the group consisting of zinc oxide, titanium dioxide, selenium oxide and zinc sulfide dispersed in a bromine-containing interpolymer consisting essentially of repeating units derived from at least one bromine-containing monomer corresponding to the general formulas: ##EQU5## wherein: R.sub.1 = H, or -CH.sub.3, R.sub.2 = alkyl radical having 1 to 4 carbon atoms, R.sub.3 = H, CH.sub.3, or --CH.sub.2 Br, ##EQU6## R.sub.6 = H or Br and at least one monomer which does not contain bromine selected from the group consisting of compounds corresponding to the general formulas ##EQU7## wherein: R 1 = H or --CH 3 , R 4 = h, cl, or t-butyl, R 5 = an alkyl radical of 1 to 8 carbon atoms or a cycloalkyl radical of 3 to 8 carbon atoms, and Z = h or -- COO -- R 5 wherein the interpolymer contains from 0.01 to 0.35 mole of bromine-containing monomer per mole of total monomers and wherein the ratio of pigment to interpolymer is in the range of from about 2:1 to 12:1 by weight.
Claim 3
Dependent Claim
31 words
The composition of claim 1, wherein there is also present from about 0.02% to about 0.5% of at least one sensitizer dye based on the weight of the photosensitive pigment therein.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |