US 5,670,283 AGranted

Electrophotographic material for color proofing

AssigneeFuji Photo Film Co., Ltd.

InventorsEiichi Kato, Sadao Osawa

Life of this patent

Estimating the term…

Loading patent…

Abstract

An electrophotographic material for color proofing which comprises a substrate, a photoconductive layer and a transfer layer in this order, and is used for preparing a color proof in a process wherein at least one color toner image is electrophotographically formed on the transfer layer and then transferred together with said transfer layer to a sheet material to prepare the color proof, wherein said photoconductive layer comprises a polymer (P) and/or a polymer particle (L) which contain units having fluorine atom(s) and/or silicon atom(s) at least in the region near the surface facing said transfer layer and the surface of said photoconductive layer which contacts with the transfer layer has tack strength of not more than 150 gram.multidot.force, which is measured by Pressure Sensitive Tape and Sheet Test of JIS Z0237-1980.

Claims5

Dependent claims

An electrophotographic material for color proofing which comprises a substrate, a photoconductive layer comprising a binder resin, and a transfer layer in this order, said material being useful for preparing a color proof in a process wherein at least one color toner image is electrophotographically formed on the transfer layer and then transferred together with said transfer layer to a sheet material to prepare the color proof,

(a) wherein said binder resin comprises a polymer (P) and/or a polymer particle (L) which contain units having fluorine atom(s) and/or silicon atom(s) at least in the region near the surface facing said transfer layer,
(b) wherein said polymer (P) is a block-copolymer comprising a polymer segment (X) which contains not less than 50% by weight of said units having fluorine atom(s) and/or silicon atom(s) and a polymer segment (Y) which contains not more than 20% by weight of said units,
(c) wherein said polymer particle (L) comprises a polymer segment (X) which contains not less than 50% by weight of said units having fluorine atom(s) and/or silicon atom(s) and a polymer segment (Y) which contains not more than 20% by weight of said units,
(d) wherein said polymer segment (X) in said polymer particle (L) contains units having at least one photo and/or thermosetting group, and said polymer segment (Y) in said polymer (P) contains units having at least one photo and/or thermosetting group,
(e) wherein said polymer segment (X) in said polymer particle (L) is insoluble in a nonaqueous solvent and the polymer segment (Y) in said polymer particle (L) is soluble in a nonaqueous solvent, and
(f) wherein the polymer (P) and/or the polymer particle (L) are contained in an amount of 0.01 to 40 parts by weight based on 100 parts by weight of all binders which are present in the photoconductive layer.

3 more elements

A process for forming a color proof wherein at least one color toner image is electrophotographically formed on an electrophotographic material for color proofing which comprises a substrate, a photoconductive layer comprising a binder resin, and a transfer layer in this order, and then transferred together with said transfer layer to a sheet material to prepare the color proof,

(a) wherein said binder resin comprises a polymer (P) and/or a polymer particle (L) which contain units having fluorine atom(s) and/or silicon atom(s) at least in the region near the surface facing said transfer layer,
(b) wherein said polymer (P) is a block-copolymer comprising a polymer segment (X) which contains not less than 50% by weight of said units having fluorine atom(s) and/or silicon atom(s) and a polymer segment (Y) which contains not more than 20% by weight of said units,
(c) wherein said polymer particle (L) comprises a polymer segment (X) which contains not less than 50% by weight of said units having fluorine atom(s) and/or silicon atom(s) and a polymer segment (Y) which contains not more than 20% by weight of said units,
(d) wherein said polymer segment (X) in said polymer particle (L) contains units having at least one photo and/or thermosetting group, and said polymer segment (Y) in said polymer (P) contains units having at least one photo and/or thermosetting group,
(e) wherein said polymer segment (X) in said polymer particle (L) is insoluble in a nonaqueous solvent and the polymer segment (Y) in said polymer particle (L) is soluble in a nonaqueous solvent, and
(f) wherein the polymer (P) and/or the polymer particle (L) are contained in an amount of 0.01 to 40 parts by weight based on 100 parts by weight of all binders which are present in the photoconductive layer.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/279,068Filed 22 Jul 1994 · continuation
Priority: JP 3-24981927 Sep 1991
Granted: 23 Sep 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G03G 5/0596
Macromolecular bonding materials: macromolecular compounds characterised by their physical properties
G03F 3/105
Checking the colour or tonal value of separation negatives or positives: using electro photographic materials
G03G 5/0589
Macromolecular bonding materials: macromolecular compounds characterised by specific side-chain substituents or end groups
G03G 13/01
Electrographic processes using a charge pattern: for multicoloured copies