Organic photoconductive element with interlayer and adhesion promoting additive专利检索-电击穿绝缘专利检索查询-专利查询网

Organic photoconductive element with interlayer and adhesion promoting additive

阅读：959发布：2021-08-31

专利汇可以提供Organic photoconductive element with interlayer and adhesion promoting additive专利检索，专利查询，专利分析的服务。并且The present invention relates to photosensitive members for electrophotography and more particularly to photosensitive layers prepared from organic photoconductive materials. The present invention provides photosensitive members which have been improved with respect to resistance to electric breakdown, adhesive ability, flexibility, and the like thereof and which are of great practical value. In accordance with the present invention, between a substrate and an organic photoconductive layer is interposed a barrier layer which is comprised mainly of copolymers comprising alkyl vinyl ethers and maleic anhydride or of composites of alkyl vinyl ethers/alkyl half esters of maleic acid copolymers and polyvinyl pyrrolidone or copolymers thereof. The photoconductive layer per se has been improved by incorporating vinylidene chloride/acrylic ester copolymers into the organic photoconductive layer.，下面是Organic photoconductive element with interlayer and adhesion promoting additive专利的具体信息内容。

权利要求

1. AN ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER COMPRISING A SUPPORT; AND OVERLYING SAID SUPPORT AN INTERMEDIATE BARRIER LAYER HAVING A THICKNESS OF LESS THAN 10 MICRONS FOR PREVENTING ELECTRIC DETERIORATION AND FATIGUE DUE TO REPEATED USE, SAID INTERMEDIATE BARRIER LAYER CONSISTING ESSENTIALLY OF (1) A COPOLYMER OF MALEIC ANHYDRIDE AND AN ALKYL VINYL ETHER WHEREIN THE ALKYL MOIETY THEREOF HAS FROM 1 TO 12 CARBON ATOMS OR (2) MIXTURES OF (A) COPOLYMERS OF ALKYL VINYL ETHERS WHEREIN THE ALKYL MOIETY THEREOF HAS FROM 1 TO 12 CARBON ATOMS AND ALKYL HALF ESTERS OF MALEIC ACID AND (B) HOMOPOLYMERS OF VINYL PYRROLIDONE HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 4,000 TO 360,000 OR COPOLYMERS OF VINYL PYRROLIDONE WITH VINYL MONOMERS COPOLYMERIZABLE THEREWITH HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 4,000 TO 360,000; AND OVERLYING SAID INTERMEDIATE BARRIER LAYER A PHOTOCONDUCTIVE LAYER CONSISTING ESSENTIALLY OF AN ORGANIC PHOTOCONDUCTOR AND FROM 1 TO 10% BY WEIGHT, BASED ON THE WEIGHT OF THE ORGANIC PHOTOCONDUCTOR, OF A COPOLYMER OF VINYLIDENE CHLORIDE AND AN ACRYLIC ACID ALKYL ESTER.

1. An electrophotographic photosensitive member comprising a support; and overlying said support an intermediate barrier layer having a thickness of less than 10 microns for preventing electric deterioration and fatigue due to repeated use, said intermediate barrier layer consisting essentially of (1) a copolymer of maleic anhydride and an alkyl vinyl ether wherein the alkyl moiety thereof has from 1 to 12 carbon atoms or (2) mixtures of (a) copolymers of alkyl vinyl ethers wherein the alkyl moiety thereof has from 1 to 12 carbon atoms and alkyl half esters of maleic acid and (b) homopolymers of vinyl pyrrolidone having an average molecular weight of from 4,000 to 360,000 or copolymers of vinyl pyrrolidone with vinyl monoMers copolymerizable therewith having an average molecular weight of from 4,000 to 360,000; and overlying said intermediate barrier layer a photoconductive layer consisting essentially of an organic photoconductor and from 1 to 10% by weight, based on the weight of the organic photoconductor, of a copolymer of vinylidene chloride and an acrylic acid alkyl ester.

2. The electrophotographic photosensitive member of claim 1, wherein the alkyl moiety of said alkyl vinyl ether has from 1 to 6 carbon atoms.

3. The electrophotographic photosensitive member of claim 1, wherein the alkyl moiety of said alkyl half esters of maleic acid has from 1 to 8 carbon atoms.

4. The electrophotographic photosensitive member of claim 3, wherein said alkyl moiety includes aryl-substitue alkyl groups.

5. The electrophotographic photosensitive member of claim 4, wherein said aryl-substituted alkyl group is benzyl.

6. The electrophotographic photosensitive member of claim 1, wherein the average molecular weight of said vinyl pyrrolidone homopolymer or copolymer is from 40,000 to 360,000.

7. The electrophotographic photosensitive member of claim 1, wherein said vinyl monomers are selected from the group consisting of styrene, vinyl chloride, vinyl acetate, methacrylate, acrylate, acrylamide, acrylonitrile, vinyl ethers, vinyl imidazole and ethylene.

8. The electrophotographic photosensitive member of claim 7, wherein the molar ratio of vinyl monomer to vinyl pyrrolidone is from seven-thirds to three-sevenths.

9. The electrophotographic photosensitive member of claim 1, wherein said substrate is composed of a material having a volume resistivity of below 109ohm/cm.

10. The electrophotographic photosensitive member of claim 1, wherein the thickness of said barrier layer is from 2 to 7 microns.

11. The electrophotographic photosensitive member of claim 1, wherein the volume resistivity of the barrier layer is from 1010 to 1011 ohm/cm.

12. The electrophotographic photosensitive member of claim 1, wherein said organic photoconductor is composed of 9-vinyl carbazole, derivatives thereof or a polymer thereof.

13. The electrophotographic photosensitive member of claim 1, wherein said photoconductive layer further includes a sensitizator for said organic photoconductor.

14. The electrophotographic photosensitive member of claim 1, wherein said barrier layer consists essentially of an unsaponified copolymer of maleic anhydride and an alkyl vinyl ether wherein the alkyl moiety thereof has from 1 to 12 carbon atoms.

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Organic photoconductive element with interlayer and adhesion promoting additive

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