Protective overcoatings for photoresponsive imaging members

Claim 2

A photoresponsive imaging member with acceptable residual voltages at from about 20 percent to about 80 percent relative humidities consisting essentially of inorganic or organic photoconductive substances, and as a release protective coating thereover a dispersion of colloidal silica and a hydroxylated silsesquixone in an alcoholic medium, which overcoating is of a thickness of from about 0.2 micron to about 1.5 microns.

Claim 3

An imaging member in accordance with claim 1 wherein the inorganic photoconductive substance is amorphous selenium or an amorphous selenium alloy.

Claim 4

An imaging member in accordance with claim 2 wherein the amorphous selenium alloy is selenium arsenic, or selenium tellurium.

Claim 5

A photoresponsive imaging member in accordance with claim 3 wherein the selenium arsenic alloy contains about 99.5 percent by weight of selenium, and 0.5 percent by weight of arsenic.

Claim 6

An organic layered photoresponsive imaging member with acceptable residual voltages at from about 20 percent to about 80 percent relative humidities, consisting essentially of a photogenerating layer containing therein a photogenerating pigment, and an aryl amine transport layer dispersed in an inactive resinous binder, the aryl amine being of the following formula ##STR2## wherein X is selected form the group consisting of (ortho)CH 3 , (meta)CH 3 , (para)CH 3 , (ortho)Cl, (meta)Cl, and (para)Cl, which member further contains thereover as a release protective overcoating a dispersion of colloidal silica and a hydroxylated silsesquixone in an alcoholic medium, and wherein the overcoating layer is of a thickness of from about 0.2 to about 1.5. microns.

Claim 7

An organic layered photoresponsive imaging member with acceptable residual voltages at from about 20 percent to about 80 percent relative humidities, consisting essentially of a photogenerating layer containing therein a photogenerating pigment, and an aryl amine transport layer dispersed in an inactive resinous binder, the aryl amine being of the following formula ##STR2## wherein X is selected form the group consisting of (ortho)CH 3 , (meta)CH 3 , (para)CH 3 , (ortho)Cl, (meta)Cl, and (para)Cl, which member further contains thereover as a release protective overcoating a dispersion of colloidal silica and a hydroxylated silsesquixone in an alcoholic medium, and wherein the overcoating layer is of a thickness of from about 0.2 to about 1.5. microns.

Claim 8

An imaging member in accordance with claim 5 wherein the photogenerating pigment is trigonal selenium, or vanadyl phthalocyanine, and this layer is situated between a supporting substrate and the aryl amine charge transport layer.

Claim 9

An imaging member in accordance with claim 5 wherein the photogenerating pigment is trigonal selenium, a metal free phthalocyanine, a metal phthalocyanine, or vanadyl phthalocyanine.

Claim 10

An imaging member in accordance with claim 5 wherein X is alkyl or halogen.

Claim 11

An imaging member in accordance with claim 1 wherein the acceptable residual voltage is from about 10 to about 150 volts.

Claim 12

An imaging member in accordance with claim 1 wherein the thickness of the overcoating layer is 1 micron.

Claim 13

An imaging member in accordance with claim 5 wherein the thickness of the overcoating layer is 1 micron.

Claim 14

An imaging member in accordance with claim 1 further including therein a silicone primer in contact with the inorganic or organic photoconductive substance.

Claim 15

An imaging member in accordance with claim 5 further including a supporting substrate, and silicone primer in contact therewith.

Claim 16

An imaging member in accordance with claim 11 wherein the thickness of the overcoating layer is 1 micron.