Additive for photoconductor end seal wear mitigation
View Patent ↗This invention provides an organic photoconductor which does not experience end-seal wear in normal use. This invention provides charge transport formulation that is easily prepared and coated by standard, dip-coating methods. This is realized by addition of a small amount of poly(methyl methacrylate-co-ethylene glycol dimethacrylate). Commercially available, 8μ spherical particles are used. These microspheres are insoluble in common organic solvents, but are readily dispersed into polycarbonate-based charge transport formulations. A photoconductor roller is mounted in pressure engagement with two end seals, each on opposite side of the roller.
1. A photoconductor having a conductive substrate, a charge generation layer and an outer charge transport layer, said outer layer comprising particulate poly(methyl methacrylate-co-ethylene glycol dimethacrylate) present in the amount of 1 to 3 percent by weight of the weight of said outer layer and a charge transport additive.
2. The photoconductor of claim 1 in which said particulate size is about 8 microns.
3. The photoconductor of claim 2 in which said particulate poly(methyl methacrylate-co-ethylene glycol dimethacrylate) is spherical.
4. The photoconductor of claim 1 in which said poly(methyl methacrylate-co-ethylene glycol dimethacrylate) is in amount of about 3 percent by weight of the weight of said outer layer.
5. The photoconductor of claim 4 in which said particulate size is about 8 microns.
6. The photoconductor of claim 5 in which said particulate poly(methyl methacrylate-co-ethylene glycol dimethacrylate) is spherical.
7. A photoconductor roller having a conductive substrate, a charge generation layer and an outer charge transport layer, said outer layer comprising particulate poly(methyl methacrylate-co-ethylene glycol dimethacrylate) present in the amount of 1 to 3 percent by weight of the weight of said outer layer, and a charge transport additive and two toner end seals each contacting said roller on opposite ends of said roller.
8. The photoconductor roller of claim 7 in which said particulate size is about 8 microns.
9. The photoconductor roller of claim 8 in which said particulate poly(methyl methacrylate-co-ethylene glycol dimethacrylate) is spherical.
10. The photoconductor roller of claim 7 in which said poly(methyl methacrylate-co-ethylene glycol dimethacrylate) is in amount of about 3 percent by weight of the weight of said outer layer.
11. The photoconductor roller of claim 10 in which said particulate size is about 8 microns.
12. The photoconductor roller of claim 11 in which said particulate poly(methyl methacrylate-co-ethylene glycol dimethacrylate) is spherical.