Photosensitive element having improved antistatic layer

Claim 2

A photographic element comprising a polymeric film support having carboxyl groups attached to the surface thereof, a photosensitive layer on the support, and a permanent antistatic layer coated on at least one surface of the support, the antistatic layer consisting essentially of the reaction product of (1) a water-soluble, electrically conductive polymer having functionally attached carboxyl groups integral to the polymer, and (2) a polyfunctional substituted aziridine wherein at least one hydrogen atom on a carbon atom of the aziridine ring is substituted with an alkyl substituent wherein alkyl is of 1 to 6 carbon atoms, wherein the aziridine interlinks the water-soluble, electrically conductive polymer having functionally attached carboxyl groups integral to the polymer and the carboxyl groups on the surface of the support to form an antistatic layer having a coating weight based on the weight of conductive polymer (1) of less than 4.5 mg/dm 2 .

Claim 3

A photographic element according to claim 1 wherein on a weight basis, the proportions of (1) to (2) range from 100:4 to 100:30.

Claim 4

A photographic element according to claim 1 wherein on a weight basis, the proportion of (1) to (2) is 100 to 10.

Claim 5

A photographic element according to claim 1 wherein the photosensitive layer is a photographic silver halide emulsion layer.

Claim 6

A photographic element according to claim 1 wherein the photosensitive layer is a layer of a photopolymer composition.

Claim 7

A photographic element according to claim 1 wherein the support is a polyester film.

Claim 8

A photographic element according to claim 6 wherein the polyester support is polyethylene terephthalate.

Claim 9

A photographic element according to claim 6 wherein the polyester support is resin coated.

Claim 10

A photographic element according to claim 6 wherein the polyester support is energy treated.

Claim 11

A photographic element according to claim 1 wherein copolymer (1) is a copolymer of the sodium salt of styrene sulfonic acid and the disodium salt of maleic acid.

Claim 12

A photographic element according to claim 1 wherein the coating weight based on the weight of conductive polymer of the antistatic layer is less than 3.8 mg/dm 2 .

Claim 13

A photographic element according to claim 1 wherein a hydrogen atom on an aziridinyl carbon atom of the polyfunctional aziridine is substituted with a methyl group.

Claim 14

A photographic element according to claim 1 wherein a hydrogen atom on an aziridinyl carbon atom of the polyfunctional aziridine is substituted with an ethyl group.

Claim 15

A photographic element according to claim 1 wherein a hydrogen atom on both aziridinyl carbon atoms of the polyfunctional aziridine is substituted with a methyl group.

Claim 16

A photographic element according to claim 1 wherein the permanent antistatic layer is coated on the same side of the support and under the photosensitive layer.

Claim 17

A photographic element according to claim 1 wherein the permanent antistatic layer is coated on the side of the support opposite the photosensitive layer.

Claim 18

A photographic element according to claim 1 wherein the photosensitive layer and antistatic layer are coated on both sides of the support.

Claim 19

A photographic element comprising a polyethylene terephthalate support having carboxyl groups attached to the surface thereof and having coated on one side a photosensitive silver halide or photopolymerizable layer, and coated on the support beneath the photosensitive layer a permanent antistatic layer consisting essentially of the reaction product of (1) a copolymer of the sodium salt of styrene sulfonic acid and the disodium salt of maleic acid in a 3:1 mole ratio, and (2) a polyfunctional substituted aziridine wherein one hydrogen atom on a carbon atom of the aziridine ring is substituted with an alkyl substituent wherein alkyl is of 1 to 4 carbon atoms, wherein the aziridine interlinks the copolymer of the sodium salt of styrene sulfonic acid and the disodium salt of maleic acid in a 3:1 mole ratio and the carboxyl groups on the surface of the support to form an antistatic layer having a coating weight based on the weight of copolymer (1) of less than 3.8 mg/dm 2 and wherein aziridine (2) may range from 4 to 30 parts per 100 parts of copolymer (1), on a weight ratio basis.

Claim 20

A photographic element comprising a polyethylene terephthalate support having carboxyl groups attached to the surface thereof and having coated on one side a photosensitive silver halide or photopolymerizable layer, and coated on the support beneath the photosensitive layer a permanent antistatic layer consisting essentially of the reaction product of (1) a copolymer of the sodium salt of styrene sulfonic acid and the disodium salt of maleic acid in a 3:1 mole ratio, and (2) a polyfunctional substituted aziridine wherein one hydrogen atom on a carbon atom of the aziridine ring is substituted with an alkyl substituent wherein alkyl is of 1 to 4 carbon atoms, wherein the aziridine interlinks the copolymer of the sodium salt of styrene sulfonic acid and the disodium salt of maleic acid in a 3:1 mole ratio and the carboxyl groups on the surface of the support to form an antistatic layer having a coating weight based on the weight of copolymer (1) of less than 3.8 mg/dm 2 and wherein aziridine (2) may range from 4 to 30 parts per 100 parts of copolymer (1), on a weight ratio basis.

Claim 21

A photographic element according to claim 1 wherein the permanent antistatic layer is solely coated on the side of the support opposite to that bearing the photosensitive layer.

Claim 22

A photographic element according to claim 18 wherein a second permanent antistatic layer is coated on the side of the support opposite to that bearing the photosensitive layer.

Claim 23

A photographic element according to claim 18 wherein a surfactant or wetting agent is present in the coating of the antistatic layer.