Diazotype material and graphic reproduction processes employing the same

Claim 2

A diazotype material, which comprises a supported light-sensitive layer comprising a light-sensitive, water-insoluble diazoimino compound of the formula reactive ##STR7##wherein R is an aryl group and R 1 and R 2 are organic radicals, which may be the same or different, or R 1 and R 2 together with the nitrogen atom to which they are attached form a 4 to 7 membered heterocyclic group, an azo coupler, and an alkaline material, said diazoimino compound, when exposed to ultraviolet light, being reactive with said azo coupler to form a visible dye product only at a pH greater than 7.

Claim 3

A diazotype material according to claim 1, wherein said diazoimino compound is 1-(4-morpholino-2,5-diethoxy-phenyl)-3-morpholino triazene.

Claim 4

A diazotype material according to claim 1, wherein said diazomino compound is 1-(4-diethylaminophenyl)-3,3-diethyl triazene.

Claim 5

A diazotype material according to claim 1, wherein said diazoimino compound is 1-(4-pyrrolidino-3-methylphenyl)-3-pyrrolidino triazene.

Claim 6

A diazotype material according to claim 1, wherein said diazomino compound is 1-(4-morpholino-2,5-diethoxyphenyl)-3,3-diallyl triazene

Claim 7

A diazotype material according to claim 1, wherein said diazoimino compound is 1-(4-p-methylphenoxy-2,5-dimethoxyphenyl)-3-morpholino triazene.

Claim 8

A diazotype material according to claim 1, wherein said diazoimino compound is 1-(4-morpholino-3-chlorophenyl)-3-morpholino triazene.

Claim 9

A diazotype material according to claim 1, wherein said diazoimino compound is 1-(4-pyrrolidino-3-methoxyphenyl)-3,3-diallyl triazene.

Claim 10

A diazotype material according to claim 1, wherein said diazoimino compound is 1-(4-morpholinophenyl)-3,3-diallyl triazene.

Claim 11

A diazotype material according to claim 1, wherein R is phenyl or naphthyl, unsubstituted or substituted by one or more substituents selected from the group consisting of C 1 to C 18 alkyl, halogen, R 3 --O--, R 4 --S-- and ##STR8##where R 3 and R 4 are independently aliphatic or aromatic, and R 5 and R 6 are hydrogen, aliphatic or aromatic, or R 5 and R 6 together with the nitrogen atom to which they are attached form a saturated or unsaturated 4 to 7 membered heterocyclic group containing the nitrogen atom as the sole heteroatom or containing oxygen, sulfur or a second nitrogen atom as an additional heteroatom; and R 1 and R 2 are independently alkyl, alkoxy, alkenyl, aralkyl or aryl, said R 1 and R 2 each having up to 18 carbon atoms; or R 1 and R 2 together with the nitrogen atom to which they are attached form a saturated or unsaturated 4 to 7 membered heterocyclic group containing the nitrogen atom as the sole heteroatom or containing oxygen, sulfur or a second nitrogen atom as an additional heteroatom.

Claim 12

A diazotype material according to claim 10, wherein R is phenyl, unsubstituted or substituted by one or more of said substituents.

Claim 13

A process for diazotype reproduction, which comprises exposing the diazotype material of claim 1 imagewise to ultraviolet light to form a negative image composed of an azoic dye in imagewise exposed areas of said diazotype material, and fixing said negative image by contacting said exposed diazotype material with an acidic material followed by exposure of the diazotype material to ultraviolet light.

Claim 14

The process according to claim 12, wherein said diazotype material is contacted with an alkaline material after said fixing.

Claim 15

The process according to claim 12, wherein said diazoimino compound is 1-(4-morpholino-2,5-diethoxyphenyl)-3-morpholino triazene.

Claim 16

The process according to claim 12, wherein said diazoimino compound is 1-(4-diethylaminophenyl)-3,3-diethyl triazene.

Claim 17

The process according to claim 12, wherein said diazoimino compound is 1-(4-pyrrolidino-3-methylphenyl)-3-pyrrolidino triazene.

Claim 18

The process according to claim 12, wherein said diazoimino compound is 1-(4-morpholino-2,5-diethoxyphenyl)-3,3-diallyl triazene.

Claim 19

The process according to claim 12, wherein said diazoimino compound is 1-(4-p-methylphenoxy-2,5-dimethoxyphenyl)-3-morpholino triazene.

Claim 20

The process according to claim 12, wherein said diazoimino compound is 1-(4-morpholino-3-chlorophenyl)-3morpholino triazene.

Claim 21

The process according to claim 12, wherein said diazoimino compound is 1-(4-pyrrolidino-3-methoxyphenyl)-3,3-diallyl triazene.

Claim 22

The process according to claim 12, wherein said diazoimino compound is 1-(4-morpholinophenyl)-3,3-diallyl triazene.

Claim 23

The process according to claim 12, wherein said acidic material is selected from the group consisting of organic and inorganic acids.

Claim 24

The process according to claim 22, wherein said acidic material is a liquid or gas.

Claim 25

The process according to claim 12, wherein R is phenyl or naphthyl, unsubstituted or substituted by one or more substituents selected from the group consisting of C 1 to C 18 alkyl, halogen, R 3 -O-, R 4 -S- and ##STR9##where R 3 and R 4 are independently aliphatic or aromatic, and R 5 and R 6 are hydrogen, aliphatic or aromatic, or R 5 and R 6 together with the nitrogen atom to which they are attached form a saturated or unsaturated 4 to 7 membered heterocyclic group containing the nitrogen atom as the sole heteroatom or containing oxygen, sulfur or a second nitrogen atom as an additional heteroatom; and R 1 and R 2 are independently alkyl, alkoxy, alkenyl, aralkyl or aryl, said R 1 and R 2 each having up to 18 carbon atoms; or R 1 and R 2 together with the nitrogen atom to which they are attached form a saturated or unsaturated 4 to 7 membered heterocyclic group containing the nitrogen atom as the sole heteroatom or containing oxygen, sulfur or a second nitrogen atom as an additional heteroatom.

Claim 26

The process according to claim 24, wherein R is phenyl, unsubstituted or substituted by one or more of said substituents.

Claim 27

A process for diazotype reproduction, which comprises contacting the diazotype material of claim 1 with an acidic material to lower the pH of said light-sensitive layer to below 7, exposing the thus treated diazotype material imagewise to ultraviolet light to form a latent positive image in imagewise non-exposed areas, and developing said latent image by contacting said diazotype material with an alkaline material.

Claim 28

The process according to claim 26, wherein said diazoimino compound is 1-(4-morpholino-2,5-diethoxyphenyl)-3-morpholino triazene.

Claim 29

The process according to claim 26, wherein said diazoimino compound is 1-(4-diethylaminophenyl)-3,3-diethyl triazene.

Claim 30

The process according to claim 26, wherein said diazomino compound is 1-(4-pyrrolidino-3-methylphenyl)-3-pyrrolidino triazene.

Claim 31

The process according to claim 26, wherein said diazoimino compound is 1-(4-morpholino-2,5-diethoxyphenyl)-3,3-diallyl triazene.

Claim 32

The process according to claim 26, wherein said diazoimino compound is 1-(4-p-methylphenoxy-2,5-dimethoxyphenyl)-3-morpholino triazene.

Claim 33

The process according to claim 26, wherein said diazoimino compound is 1-(4-morpholino-3-chlorophenyl)-3-morpholino triazine.

Claim 34

The process according to claim 26, wherein said diazoimino compound is 1-(4-pyrrolidino-3-methoxyphenyl)-3,3-diallyl triazene.

Claim 35

The process according to claim 26, wherein said diazoimino compound is 1-(4-morpholinophenyl)-3,3-diallyl triazene.

Claim 36

The process according to claim 26, wherein said acidic material is selected from the group consisting of organic and inorganic acids.

Claim 37

The process according to claim 35, wheein said acidic material is a liquid or gas.

Claim 38

The process according to claim 26, wherein R is phenyl or naphthyl, unsubstituted or substituted by one or more substituents selected from the group consisting of C 1 to C 18 alkyl, halogen, R 3 --O--, R 4 --S-- and ##STR10##where R 3 and R 4 are independently aliphatic or aromatic, and R 5 and R 6 are hydrogen, aliphatic or aromatic, or R 5 and R 6 together with the nitrogen atom to which they are attached form a saturated or unsaturated 4 to 7 membered heterocyclic group containing the nitrogen atom as the sole heteroatom or containing oxygen, sulfur or a second nitrogen atom as an additional heteroatom; and R 1 and R 2 are independently alkyl, alkoxy, alkenyl, aralkyl or aryl, said R 1 and R 2 each having up to 18 carbon atoms; or R 1 and R 2 together with the nitrogen atom to which they are attached form a saturated or unsaturated 4 to 7 membered heterocyclic group containing the nitrogen atom as the sole heteroatom or containing oxygen, sulfur or a second nitrogen atom as an additional heteroatom.

Claim 39

The process according to claim 37 wherein R is phenyl, unsubstituted or substituted by one or more of said substituents.