GB1199061A - Improvements relating to the Preparation of Photoconductive Recording Materials - Google Patents

Improvements relating to the Preparation of Photoconductive Recording Materials

Info

Publication number
GB1199061A
GB1199061A GB19186/67A GB1918667A GB1199061A GB 1199061 A GB1199061 A GB 1199061A GB 19186/67 A GB19186/67 A GB 19186/67A GB 1918667 A GB1918667 A GB 1918667A GB 1199061 A GB1199061 A GB 1199061A
Authority
GB
United Kingdom
Prior art keywords
polymers
layer
coating
photoconductor
soluble
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.)
Expired
Application number
GB19186/67A
Inventor
Karel Eugeen Verhille
Robert Joseph Noe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Agfa Gevaert NV filed Critical Agfa Gevaert NV
Priority to GB19186/67A priority Critical patent/GB1199061A/en
Priority to FR1560975D priority patent/FR1560975A/fr
Priority to BE714257D priority patent/BE714257A/xx
Priority to NL6805982.A priority patent/NL158623B/en
Priority to US724459A priority patent/US3595691A/en
Priority to DE19681772316 priority patent/DE1772316C3/en
Publication of GB1199061A publication Critical patent/GB1199061A/en
Expired legal-status Critical Current

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
    • G03G5/08—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being inorganic
    • G03G5/087—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being inorganic and being incorporated in an organic bonding material
    • 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
    • G03G5/0525—Coating methods

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

1,199,061. Photoconductive composition. GEVAERT-AGFA N.V. 1 April, 1968 [26 April, 1967], No. 19186/67. Heading H1K A photo-conductive recording layer comprises an inorganic photoconductor dispersed in a binder consisting of a mixture of binding agents which are not mutually soluble in the solid state wherein at least one agent is a polymer containing groups having the properties of a Lewis base and wherein at least another agent is a polymer containing gronps having the properties of a Lewis acid or a neutralized Lewis base or acid and wherein the layer has a porous structure. The cavities of the porous structure are not more than 50% of the volume of the layer, randomly distributed, microscopic and interconnected. The photoconductor may be ZnO and the layer is preferably coated on glassine paper to form an electrophotographic plate. In the specific embodiments the Lewis base polymer is polyvinylbutyral, a cellulose ether derivative, ethyl cellulose or copolyvinyl chloride-vinyl acetatemaleic anhydride whilst the other polymer is copolyvinyl acetate-vinyl laurate, but many other polymers of both types are specified. Acid butyl phosphate, tetrachlorophthalic anhydride and various sensitizing dyestuffs may be added. The recording layer is made by dispersing the photoconductor in a solution containing at least one organic solvent having dissolved therein at least polymers, coating the solution on a support and drying the coating at such a rate that at least a part of one of the polymers precipitates from the solvent before the other polymers and that on completion of drying, the dried coating contains randomly interconnected microscopic cavities. The polymers must not be soluble in water at pH 7, must be differentially soluble in the solvent, must form a clear solution and must be mutually insoluble in the solid state, thus giving a layer which has macroscopic heterogeneities that are detectable by the eye. It is preferred to use a mixture of sym.-dichloroethane, ethanol and cyclohexanone or ethyl methyl ketone, and to dry the coating in two stages, the first at a slow evaporation rate and the second at a much faster evaporation rate.
GB19186/67A 1967-04-26 1967-04-26 Improvements relating to the Preparation of Photoconductive Recording Materials Expired GB1199061A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB19186/67A GB1199061A (en) 1967-04-26 1967-04-26 Improvements relating to the Preparation of Photoconductive Recording Materials
FR1560975D FR1560975A (en) 1967-04-26 1968-04-24
BE714257D BE714257A (en) 1967-04-26 1968-04-26
NL6805982.A NL158623B (en) 1967-04-26 1968-04-26 METHOD OF MANUFACTURING A PHOTO-CONDUCTIVE RECORDING MATERIAL.
US724459A US3595691A (en) 1967-04-26 1968-04-26 Preparation of photoconductive recording materials
DE19681772316 DE1772316C3 (en) 1968-04-27 Process for the production of electrophotographic recording materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19186/67A GB1199061A (en) 1967-04-26 1967-04-26 Improvements relating to the Preparation of Photoconductive Recording Materials

Publications (1)

Publication Number Publication Date
GB1199061A true GB1199061A (en) 1970-07-15

Family

ID=10125187

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19186/67A Expired GB1199061A (en) 1967-04-26 1967-04-26 Improvements relating to the Preparation of Photoconductive Recording Materials

Country Status (5)

Country Link
US (1) US3595691A (en)
BE (1) BE714257A (en)
FR (1) FR1560975A (en)
GB (1) GB1199061A (en)
NL (1) NL158623B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258114A (en) * 1978-05-10 1981-03-24 U.S. Philips Corporation Electrophotographic recording material and method of manufacturing same

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1376196A (en) * 1971-06-08 1974-12-04 Agfa Gevaert Photoconductive recording layers
GB1422336A (en) * 1972-04-13 1976-01-28
JPS4924382A (en) * 1972-06-26 1974-03-04
CA1069745A (en) * 1975-03-26 1980-01-15 Xerox Corporation Photoconductive layer containing dispersed elastomeric material derived from a heterogenous copolymer
JPS6035057B2 (en) * 1979-07-13 1985-08-12 株式会社リコー Electrophotographic photoreceptor
NL8100163A (en) * 1981-01-15 1982-08-02 Oce Nederland Bv REPEATEDLY USABLE ELECTROPHOTOGRAPHIC ELEMENT AND METHOD FOR MANUFACTURING THAT ELEMENT.
JP2621127B2 (en) * 1992-11-13 1997-06-18 富士写真フイルム株式会社 Manufacturing method of electrophotographic lithographic printing plate precursor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258114A (en) * 1978-05-10 1981-03-24 U.S. Philips Corporation Electrophotographic recording material and method of manufacturing same

Also Published As

Publication number Publication date
FR1560975A (en) 1969-03-21
NL6805982A (en) 1968-09-25
BE714257A (en) 1968-10-28
US3595691A (en) 1971-07-27
NL158623B (en) 1978-11-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee