Claims
- 1. In a unitary multilayer photoconductive element having a photoconductive insulating composition in electrical contact with a conductive layer, the improvement wherein said element comprises, as an interlayer between said photoconductive insulative composition and said conducting layer, an amorphous, water-insoluble polyester selected from the group consisting of
- (a) polyesters having recurring units derived from at least one aromatic dicarboxylic acid component and at least one diol component, at least one of said acid or diol components being a non-linear monomer selected from the group consisting of an isophthalic acid component or a branched-chain alkylenediol having the formula
- HO--CH.sub.2 --R.sup.1 --CH.sub.2 --OH
- wherein R.sup.1 is a branched-chain alkylene group, and
- (b) polyester copolymers having recurring units derived from at least one aromatic dicarboxylic acid component and at least one diol component, at least one of said acid or said diol components being a mixture of at least two different acids or two different diols, respectively, so that a copolyester is obtained, and at least one of said acid or one of said diol components being selected from the group consisting of a nonlinear monomer as defined above or a cycloaliphatic diol.
- 2. In a unitary multilayer photoconductive element as defined in claim 1, the improvement wherein said polyester is a member selected from the group consisting of
- (a) a copolyester of terephthalic acid, ethylene glycol, and neopentyl glycol;
- (b) a copolyester of terephthalic acid, isophthalic acid, cyclohexanedimethanol, and ethylene glycol; and
- (c) a copolyester of terephthalic acid, isophthalic acid, and ethylene glycol.
- 3. The unitary multilayer photoconductive element of claim 1, wherein said photoconductive insulating composition is a homogeneous organic photoconductive insulating composition.
- 4. A unitary multilayer photoconductive element as defined in claim 3 wherein said polyester is a copolyester of terephthalic acid, ethylene glycol, and neopentyl glycol.
- 5. The unitary multilayer photoconductive element of claim 1, wherein said photoconductive insulating composition is a multiphase aggregate photoconductive insulating composition.
- 6. A unitary multilayer photoconductive element as defined in claim 5 wherein said polyester is a copolyester of terephthalic acid, ethylene glycol, and neopentyl glycol.
- 7. The unitary multilayer photoconductive element of claim 1, wherein said photoconductive insulating composition is a multi-active photoconductive insulating composition having a charge generation layer containing an aggregate photoconductive material in electrical contact with a charge transport layer containing an organic photoconductor.
- 8. A unitary multilayer photoconductive element as defined in claim 7, wherein said polyester is a copolyester of terephthalic acid, ethylene glycol, and neopentyl glycol.
Parent Case Info
This application is a continuation-in-part application of U.S. Pat. Application Ser. No. 696,248 filed June 15, 1976 now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (4)
Number |
Date |
Country |
792846 |
Aug 1968 |
CAX |
799555 |
Nov 1968 |
CAX |
1356004 |
Jun 1974 |
GBX |
1431415 |
Apr 1976 |
GBX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
696248 |
Jun 1976 |
|