Abstract This application describes photographic material which comprises a support base having coated thereon on one or both sides at least one photographic emulsion layer, and having coated on each topmost emulsion layer a gelatin supercoat layer, there being present on at least one supercoat layer an antistatic layer which is a layer of a homopolymer of a compound of general formula I: (CH2 CH - CH2)2NR1R2 X I where R1 and R2 are each hydrogen atoms or alkyl groups and X is an anion, or a copolymer thereof with minor amounts of other ethylenically unsaturated monomers, the said homo- or copolymer layer having been coated from a lower primary alcohol solution, or photographic material which comprises a support base which has on one side thereof at least one photographic emulsion layer and which has on the other side an antistatic layer which is a layer of a homopolymer of a compound of the above formula I or a copolymer thereof with minor amounts of other ethylenically unsaturated monomers.
Photographic material according to claim 1 wherein in the compound therein defined R1 and R2 are each methyl groups.
Claim 2
Dependent Claim
31 words
Photographic material according to claim 1 wherein the copolymer layer is a copolymer of the compound defined in claim 1 together with up to 7 percent of vinylpyrrolidone, acrylamide or styrene.
Claim 3
Dependent Claim
76 words
Photographic material which comprises a film support which has on one side thereof at least one photographic emulsion layer and which has on the other side an antistatic layer which is a layer of a homopolymer of a compound of the general formula (CH2 CH-CH2)2NR1R2 X where R1 and R2 are each hydrogen atoms or alkyl groups and X is an anion, or a copolymer thereof with up to 7 percent of other ethylenically unsaturated monomers.
Claim 4
Dependent Claim
19 words
Photographic material according to claim 4 wherein in the compound therein defined R1 and R2 are each methyl groups.
Claim 5
Dependent Claim
31 words
Photographic material according to claim 4 wherein the copolymer layer is a copolymer of the compound defined in claim 4 together with up to 7 percent of vinylpyrrolidone, acrylamide or styrene.
Claim 6
Dependent Claim
98 words
X-ray film material which comprises a film support having coated on each side a photographic emulsion layer and having coated on each emulsion layer a gelatin supercoat layer, there being present on each supercoat layer an antistatic layer which is a layer of a homopolymer of a compound of the general formula: (CH2 CH-CH2)2NR1R2 X where R1 and R2 are each hydrogen atoms or alkyl groups and X is an anion, or a copolymer thereof with up to of other ethylenically unsaturated monomers, the said homo- or copolymer layer having been coated from a lower primary alcohol solution.
Claim 7
Dependent Claim
106 words
A process for the preparation of an antistatic layer on photographic material which comprises a film support having coated thereon on one or both sides at least one photographic emulsion layer, and having coated on each top-most emulsion layer a supercoat layer, which process comprises coating on at least one supercoat layer a lower primary alcohol solution of a homopolymer of a compound of the general formula: (CH2 CH-CH2)2NR1R2 X where R1 and R2 are each hydrogen atoms or alkyl groups and X is an anion, or a copolymer thereof with up to 7 percent of other ethylenically unsaturated monomers and removing the lower primary alcohol.