Control of crazing, cracking or crystallization of a charge transport layer in a photoconductor
View Patent ↗A charge transport composition is provided including a cyclo-aliphatic ether compound. One purpose of the cyclo-aliphatic ether compound is to improve the resistance to crazing, crystallization and etching of the charge transport layer. The charge transport composition may be coated along with a charge generation composition onto a conductive substrate to form a photoconductor. The charge transport composition may therefore be employed in a photoconductor located in a printer or a printer cartridge.
1. A charge transport composition comprising:
a charge transport compound;
a binder; and
a cyclo-aliphatic ether compound of the structure:
wherein n has a value of 0-10,
R 1 is a hydrogen atom, an aliphatic or aromatic group; and
R 2 is a hydrogen atom, an aliphatic group, an aromatic group, or an aliphatic/aromatic group.
2. The charge transport composition of claim 1 wherein R 2 is selected from an aliphatic group comprising the structure:
—(CH 2 ) x —CH 3 wherein x may have a value of 0-20.
3. The charge transport composition of claim 2 wherein x has a value of 7.
4. The charge transport composition of claim 2 wherein x has a value of 9.
5. The charge transport composition of claim 1 wherein said cyclo-aliphatic ether compound comprises a mixture of compounds having the following structures:
6. The charge transport composition of claim 1 wherein said charge transport compound is present in the range of about 5 to 50% by weight, said binder is present in the range of about 25-95% by weight and said cyclo-aliphatic ether compound is present in the range of about 1-25% by weight.
7. A photoconductor comprising:
a substrate;
a charge generation layer covering at least a portion of said substrate, and
a charge transport layer covering at least a portion of said charge generation layer, said charge transport layer comprising:
a charge transport compound;
a binder; and
a cyclo-aliphatic ether compound of the structure:
wherein n has a value of 0-10,
R 1 is a hydrogen atom, an aliphatic or aromatic group, and
R 2 is a hydrogen atom, an aliphatic group, an aromatic group or an aliphatic/aromatic group.
8. The photoconductor of claim 7 wherein R 2 is selected from an aliphatic group comprising the structure:
—(CH 2 ) x —CH 3 wherein x may have a value of 0-20.
9. The photoconductor of claim 8 wherein x has a value of 7.
10. The photoconductor of claim 8 wherein x has a value of 9.
11. The photoconductor of claim 7 wherein said cyclo-aliphatic ether compound comprises a mixture of compounds having the following structures:
12. The photoconductor of claim 7 wherein said charge transport compound is present in the range of about 5 to 50% by weight, said binder is present in the range of about 25-95% by weight and said cyclo-aliphatic ether compound is present in the range of about 1-25% by weight.
13. The photoconductor of claim 7 wherein said photoconductor exhibits a discharge voltage in the range of −100V to −400V at 49 ms expose-to-develop-time using a laser wavelength of 780 nm and a laser energy in the range of 0.01 to 10 μJ/cm 2 measured.
14. The photoconductor of claim 7 located in a printer cartridge.
15. A printer having a photoconductor comprising:
a substrate;
a charge generation layer covering at least a portion of said substrate; and
a charge transport layer covering at least a portion of said charge generation layer, said charge transport layer comprising:
a charge transport compound;
a binder; and
a cyclo-aliphatic ether compound of the structure:
wherein n has a value of 0-10,
R 1 is a hydrogen atom, an aliphatic or aromatic group, and
R 2 is a hydrogen atom, an aliphatic group, an aromatic group or an aliphatic/aromatic group.
16. The printer of claim 15 wherein R 2 is selected from an aliphatic group comprising the structure:
—(CH 2 ) x —CH 3 wherein x may have a value of 0-20.
17. The printer of claim 16 wherein x has a value of 7.
18. The printer of claim 16 wherein x has a value of 9.
19. The printer of claim 15 wherein said cyclo-aliphatic ether compound comprises a mixture of compounds having the following structures:
20. The printer of claim 15 wherein said charge transport compound is present in the range of about 5 to 50% by weight, said binder is present in the range of about 25-95% by weight and said cyclo-aliphatic ether compound is present in the range of about 1-25% by weight.