UST889020I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST889020I4 UST889020I4 US889020DH UST889020I4 US T889020 I4 UST889020 I4 US T889020I4 US 889020D H US889020D H US 889020DH US T889020 I4 UST889020 I4 US T889020I4
- Authority
- US
- United States
- Prior art keywords
- polymer
- softening point
- electrical
- binder
- alkylated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/05—Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
- G03G5/0528—Macromolecular bonding materials
- G03G5/0532—Macromolecular bonding materials obtained by reactions only involving carbon-to-carbon unsatured bonds
- G03G5/0535—Polyolefins; Polystyrenes; Waxes
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/05—Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
- G03G5/0528—Macromolecular bonding materials
- G03G5/0557—Macromolecular bonding materials obtained otherwise than by reactions only involving carbon-to-carbon unsatured bonds
- G03G5/0567—Other polycondensates comprising oxygen atoms in the main chain; Phenol resins
Definitions
- the blends comprise a polycarbonate, polyester or polystyrene resin with a polymer which causes reduction of the electrical contrast of the photoconciuctive layer.
- the latter polymer can be (a) an alkylated styrene polymer having a softening point from about 100-150 C., or (b) a fi-pinene polymer having a softening point around 100 C. or (c) a terpene-phenol copolymer having a softening point around 100 C.
- An example is a composition containing (a) 150 parts by weight of a 50/50 blend of bisphenol A polycarbonate and alkylated polystyrene of which the styrene rings have one ethyl or two methyl substituents as a binder for (b) 50 parts of the organic photoconductor phenyldibenzylamine and (c) one part of a pyryliurn sensitizing dye.
- the mixture is coated on a subbed nickel support and used as a xerographic plate. After charging in the dark to a surface potential of about 600 volts, its gamma for a positive charge is 1.07 and the ratio of electrical H & D shoulder and toe speed is 2000/25.
- the use of the alkylated styrene polymer, the fi-pinene polymer or the terpenephenol copolymer for blending with other binder resins enables one to prepare photoconductive elements of a desired contrast level.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
Abstract
THE ELECTRICAL CONTRAST OF ELECTROPHOTOGRAPHIC ELEMENTS IS LOWERED WHILE KEEPING SPEED REASONABLY HIGH BY USING NOVEL BLENDS OF RESINS AS BINDER MATERIALS FOR ORGANIC OR INORGANIC PHOTOCONDUCTORS IN THE PHOTOCONDUCTIVE LAYERS OF THE ELECTROPHOTOGRAPHIC ELEMENTS. THE BLENDS COMPRISE A POLYCARBONATE, POLYESTER OR POLYSTYRENE RESIN WITH A POLYMER WHICH CAUSES REDUCTION OF THE ELECTRICAL CONTRAST OF THE PHOTOCONDUCTIVE LAYER. THE LAYER POLYMER CAN BE (A) AN ALKYLATED STYRENE, POLYMER HAVING A SOFTENING POINT FROM ABOUT 100-150* C. OR (B) A B-PINENE POLYMER HAVING A SOFTENING POINT AROUND 100* C. OR (C) A TERPENE-PHENOL COPOLYMER HAVING A SOFTENING POINT AROUND 100* C. AN EXAMPLE IS A COMPOSITION CONTAINING (A) 150 PARTS BY WEIGHT OF A 50/50 BLEND OF BISPHENOL A POLYCARBONATE AND ALKYLATED POLYSTYRENE OF WHICH THE STYRENE RINGS HAVE ONE ETHYL OR TWO METHYL SUBSTITUENTS AS A BINDER FOR (B) 50 PARTS OF THE ORGANIC PHOTOCONDUCTOR PHENYLDIBENZYLAMINE AND (C) ONE PART OF A PYRYLIUM SENSITIZING DYE. THE MIXTURE IS COATED ON A SUBBED NICKEL SUPPORT AND USED AS A XEROGRAPHIC PLATE. AFTER CHARGING IN THE DARK TO A SURFACE POTENTIAL OF ABOUT 600 VOLTS, ITS GAMMA FOR A POSITIVE CHARGE IS 1.07 AND THE RATIO OF ELECTRICAL H & D SHOULDER AND TOE SPEED IS 2000/25. THE USE OF THE ALKYLATED STYRENE POLYMER, THE B-PINENE POLYMER OR THE TEPENEPHENOL COPOLYMER FOR BLENDING WITH OTHER BINDER RESINS ENABLES ONE TO PREPARE PHOTOCONDUCTIVE ELEMENTS OF A DESIRED CONTRAST LEVEL.
Description
DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969. 869 0.61. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. Thethending of each abstract indicates the number of pages of specification. including claims and sheets of drawings contained in the application as originally died. The files or these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED AUGUST 31, 1971 T889 020 BINDER MATERIALS FO R PHOTOCONDUCTIV E LAYERS CONTAINING BLENDS 0F RESINS Oris L. Stanton, 1669 Lake Ave., Rochester, N.Y. 14650 Filed Oct. 6, 1970, Ser. No. 78,578 Int. Cl. G03g 5/04 U.S. Cl. 961.5 No Drawing. 18 Pages Specification The electrical contrast of electrophotographic elements is lowered while keeping speed reasonably high by using novel blends of resins as binder materials for organic or inorganic photoconductors in the photoconductive layers of the electrophotographic elements. The blends comprise a polycarbonate, polyester or polystyrene resin with a polymer which causes reduction of the electrical contrast of the photoconciuctive layer. The latter polymer can be (a) an alkylated styrene polymer having a softening point from about 100-150 C., or (b) a fi-pinene polymer having a softening point around 100 C. or (c) a terpene-phenol copolymer having a softening point around 100 C. An example is a composition containing (a) 150 parts by weight of a 50/50 blend of bisphenol A polycarbonate and alkylated polystyrene of which the styrene rings have one ethyl or two methyl substituents as a binder for (b) 50 parts of the organic photoconductor phenyldibenzylamine and (c) one part of a pyryliurn sensitizing dye. The mixture is coated on a subbed nickel support and used as a xerographic plate. After charging in the dark to a surface potential of about 600 volts, its gamma for a positive charge is 1.07 and the ratio of electrical H & D shoulder and toe speed is 2000/25. The use of the alkylated styrene polymer, the fi-pinene polymer or the terpenephenol copolymer for blending with other binder resins enables one to prepare photoconductive elements of a desired contrast level.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7857870A | 1970-10-06 | 1970-10-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
UST889020I4 true UST889020I4 (en) | 1971-08-31 |
Family
ID=22144945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US889020D Pending UST889020I4 (en) | 1970-10-06 | 1970-10-06 | Defensive publication |
Country Status (3)
Country | Link |
---|---|
US (1) | UST889020I4 (en) |
CA (1) | CA945424A (en) |
FR (1) | FR2111031A5 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1153195A (en) * | 1980-01-11 | 1983-09-06 | Eastman Kodak Company | Preparation of heterogeneous photoconductive composition containing a thiopyrilium dye in a blend of aggregating and non-aggregating polymers |
-
1970
- 1970-10-06 US US889020D patent/UST889020I4/en active Pending
-
1971
- 1971-09-03 CA CA122,079A patent/CA945424A/en not_active Expired
- 1971-10-06 FR FR7135911A patent/FR2111031A5/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA945424A (en) | 1974-04-16 |
FR2111031A5 (en) | 1972-06-02 |
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