Organic photoconductive material for electrophotography
AssigneeMita Industrial Co., Ltd.
InventorsToshihiko Nishiguchi, Mika Yamamura
Life of this patent
Estimating the term…
Abstract
Disclosed is an organic photoconductive material for the electrophotography, which comprises a linear high-molecular-weight polymer having a rhodanine derivative of the following formula incorporated as a substituent: ##STR1## In this derivative group, a benzylidene group or the like is bonded to the 5-position of the rhodanine ring. A photosensitive material comprising a polymer having this rhodanine derivative group shows a photoconductivity to visible rays even without addition of a charge-generating pigment.
Claims16
A charge-generating material for electrophotography, which comprises a linear high-molecular-weight polymer substituted with a rhodanine derivative having the following structural formula ##STR19## wherein X is a substituent selected from the group consisting of ##STR20## in which R.sub.1 stands for a lower alkyl group having up to 6 carbon atoms or a hydroxyl group, R.sub.2 and R.sub.3 stand for a hydrogen atom, a substituted or unsubstituted aryl group or a hydroxyl group, and R.sub.4 stands for a hydrogen atom, a lower alkyl group having up to 6 carbon atoms, a substituted or unsubstituted aryl group or a hydroxyl group, said rhodanine derivative group being present in an amount of 20 to 50% by weight based on the polymer, and said polymer having a weight average molecular weight of about 15,000 to 200,000.
A photoconductive material for the electrophotography, which comprises a linear high-molecular-weight polymer comprising recurring units represented by the following formula ##STR21## wherein R.sub.7 represents a hydrogen atom or a methyl group, Y is a divalent group selected from the group consisting of --NH--, --OCH.sub.2 --, --NHCOCH.sub.2 -- and ##STR22## and X is a substituent selected from the group consisting of ##STR23## in which R.sub.1 stands for a lower alkyl group having up to 6 carbon atoms or a hydroxyl group, R.sub.2 and R.sub.3 stand for a hydrogen atom, a substituted or unsubstituted aryl group or a hydroxyl group, and R.sub.4 stands for a hydrogen atom, a lower alkyl group having up to 6 carbon atoms, a substituted or unsubstituted aryl group or a hydroxyl group;
- and a charge-transporting material.
A photoconductive material for the electrophotography, which comprises a linear high-molecular-weight polymer comprising recurring units represented by the following formula ##STR24## wherein R.sub.7 represents a hydrogen atom or a methyl group, and X is a substituent selected from the group consisting of ##STR25## in which R.sub.1 stands for a lower alkyl group having up to 6 carbon atoms or a hydroxyl group, R.sub.2 and R.sub.3 stand for a hydrogen atom, a substituted or unsubstituted aryl group or a hydroxyl group, and R.sub.4 stands for a hydrogen atom, a lower alkyl group having up to 6 carbon atoms, a substituted or unsubstituted aryl group or a hydroxyl group and a charge-transporting material.
A photoconductive material for electrophotography, which comprises a linear high-molecular-weight polymer comprising recurring units represented by the following formula:
- ##STR26## and a charge-transporting material.
A charge-generating material for electrophotography, which comprises a linear high-molecular-weight polymer substituted with a rhodanine derivative having the following structural formula:
- ##STR27## wherein X is a substituent selected from the group consisting of ##STR28## in which R.sub.1 stands for a lower alkyl group having up to 6 carbon atoms or a hydroxyl group,
- R.sub.2 and R.sub.3 stand for a hydrogen atom, a substituted or unsubstituted aryl group or a hydroxyl group, and
- R.sub.4 stands for a hydrogen atom, a lower alkyl group having up to 6 carbon atoms, a substituted or unsubstituted aryl group or a hydroxyl group,
- R.sub.7 represents a hydrogen atom or a methyl group, and
- Y is a divalent group selected from the group consisting of --NH--, --CH.sub.2 --, --NHCOCH.sub.2 -- and ##STR29## said rhodanine derivative group being present in an amount of 20 to 50% by weight based on the polymer, and said polymer having a weight average molecular weight of about 15,000 to about 200,000.
Dependencies are inferred from the claim text.