Recording sheet

Claim 2

A RECORDING SHEET COMPRISING A SUPPORT HAING THEREON A COLOR DEVELOPER LAYER CAPABLE OF REACTING WITH A COLOR FORMER TO FORM A COLOR IMAGES, SAID COLOR DEVELOPER LAYER CONTAINING (1) A METAL SALT OF AN AROMATIC CARBOXYLIC ACID AND (2) AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ETHERS AND ALCOHOLS, SAID COMPONENT (1) AND SAID COMPONENT (2) BEING PRESENT AT A PROPORTION SUFFICIENT TO INCREASE THE COLORDEVELOPING ABILITY OF SAID COLOR DEVELOPER AND SAID COLOR FORMER.

Claim 3

The recording sheet of claim 1, wherein said metal of said metal salt of an aromatic carboxylic acid is a member of Group I B, Group II A, Group II B, Group III B, Group IV A, Group VI A, Group VII B or Group VIII of the Periodic Table.

Claim 4

The recording sheet of claim 1, wherein said aromatic carboxylic acid is represented by the formula:

Claim 5

The recording sheet of claim 3, wherein said metal of said metal salt of an aromatic carboxylic acid is a member of Group I B, Group II A, Group II B, GroUp III B, Group IV A, Group VI A, Group VII B or Group VIII of the Periodic Table; wherein said color developer layer contains from 10 to 250 parts by weight of said ether and alcohol per 100 parts by weight of said aromatic carboxylic acid and wherein said color developer layer is present on said support at a level of at least 0.1 g/m2 as the metal salt of the aromatic carboxylic acid; said ether is represented by the formula: ROX wherein X is -(CH2)pOR'', -(CH2)pOH, -((CH2)nO)qH, -((CH2)nO)qR'''', an alkyl group having up to 18 carbon atoms or an alkenyl group having up to 18 carbon atoms, R is an alkyl group having up to 10 carbon atoms, an aryl group having up to 10 carbon atoms or an alkenyl group having up to 10 carbon atoms, R'' and R'''' each is an alkyl group having up to 18 carbon atoms, an aryl group having up to 18 carbon atoms or an alkenyl group having up to 18 carbon atoms, p is an integer of 1 to 20 and q is an integer of 2 to 30; and the alcohol is an aliphatic alcohol having from 1 to 18 carbon atoms.

Claim 6

The recording sheet of claim 1, wherein said ether is a glycol ether.

Claim 7

The recording sheet of claim 1, wherein said alcohol is an alcohol having 4 or more carbon atoms.

Claim 8

The recording sheet of claim 1, wherein said color developer layer contains a mixture of at least on ether and at least on alcohol.

Claim 9

The recording sheet of claim 1, wherein said color developer layer contains from 10 to 250 parts by weight of said ether and alcohol per 100 parts by weight of said aromatic carboxylic acid and wherein said color developer layer is present on said support a level of at least 0.1 g/m2 as the metal salt of the aromatic carboxylic acid.

Claim 10

The recording sheet of claim 1, wherein said ether is represented by the formula: ROX wherein X is -(CH2)pOR'', -(CH2)pOH, -((CH2)nO)qH, -((CH2)nO)qR'''', an alkyl group having up to 18 carbon atoms or an alkenyl group having up to 18 carbon atoms, R is an alkyl group having up to 10 carbon atoms, an aryl group having up to 10 carbon atoms or an alkenyl group having up to 10 carbon atoms, R'' and R'''' each is an alkyl group having up to 18 carbon atoms, an aryl group having up to 18 carbon atoms or an alkenyl group having up to 18 carbon atoms, p is an integer of 1 to 20 and q is an integer of 2 to 30.

Claim 11

The recording sheet of claim 1 wherein said alcohol is an aliphatic alcohol having 1 to 18 carbon atoms.

Claim 12

The recording sheet of claim 1 wherein said alcohol is selected from the group consisting of n-butyl alcohol, n-amyl alcohol, n-hexyl alcohol, n-heptyl alcohol, n-octyl alcohol, n-nonyl alcohol, n-decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, isobutyl alcohol, sec-butyl alcohol, isoamyl alcohol, tert-butyl alcohol, sec-butyl carbinol, diethyl carbinol, 1-hexanol, 2-hexanol, 3-hexanol, cyclohexanol, 3-methyl-1-pentanol, 4-methyl-2-hexanol, allyl alcohol, trans-crotyl alcohol, ciscrotyl alcohol, 2-methyl-3-buten-1-ol, o-tolyl carbinol m-tolyl carbinol, p-tolyl carbinol and benzyl alcohol.

Claim 13

The recording sheet of claim 1 wherein said aromatic carboxylic acid is selected from the group consisting of benzoic acid, nitrobenzoic acid, chlorobenzoic acid, toluic acid, 4-methyl-3-nitrobenzoic acid, 2-chloro-4-nitrobenzoic acid, 2,3-dichlorobenzoic acid, 4-methyl-3-nitrobenzoic acid, 4-acetylbenzoic acid, 2,4-dihydroXybenzoic acid, 2,5-dihydroxybenzoic acid, 1-napththoic acid, 2-naphthoic acid, 1-hydroxy-2-naphthoic acid, 2-hydroxy-3-naphthoic acid, 2-hydroxy-1-naphthoic acid, thiosalicyclic acid, salicylic acid, 3,5-dinitrosalicylic acid, 3-methylsalicyclic acid, 2,4-cresotinic acid, 2,5-cresotinic acid, 3-methylsalicyclic acid, 2,4-cresotinic acid, 2,5-cresotinic acid, 5-tert-butylsalicylic acid, 3-phenylsalicylic acid, 3-methyl-5-tert-butylsalicylic acid, 3,5-di-tert-butylsalicylic acid, 3,5-di-tert-amylsalicylic acid, 3-cyclohexylsalicylic acid, 5-cyclohexylsalicylic acid and 3-methyl-5-isoamylsalicylic acid.

Claim 14

The recording sheet of claim 1, wherein said metal salt of said aromatic carboxylic acid is a copper, zinc, aluminum, tin or nickel salt.

Claim 15

A pressure sensitive copying assembly comprising a color former layer on a first support and a color developer layer on a second support, said color developer layer and said color former layer being brought together at the time of pressure sensitive copying to permit color developer and color former to be brought into reactive contact to form a color image, said color developer layer containing (1) a metal salt of an aromatic carboxylic acid and (2) at least one member selected from the group consisting of ethers and alcohols, said component (1) and said component (2) being present at a porportion sufficient to increase the color-developing ability of said color developer and said color former.

Claim 16

A pressure sensitive copying assembly comprising a color former layer on a first support and a color developer layer on a second support, said color developer layer and said color former layer being brought together at the time of pressure sensitive copying to permit color developer and color former to be brought into reactive contact to form a color image, said color developer layer containing (1) a metal salt of an aromatic carboxylic acid and (2) at least one member selected from the group consisting of ethers and alcohols, said component (1) and said component (2) being present at a porportion sufficient to increase the color-developing ability of said color developer and said color former.

Claim 17

The pressure sensitive copying assembly of claim 14 wherein said color developer layer contains from 10 to 250 parts by weight of said ether and alcohol per 100 parts by weight of said aromatic carboxylic acid and wherein said color developer layer is present on said support at a level of at least 0.1 g/m2 as the metal salt of the aromatic carboxylic acid.

Claim 18

The pressure sensitive copying assembly of claim 15, wherein said metal of said metal salt of an aromatic carboxylic acid is a member of Group I B, Group II A, Group II B, Group III B, Group IV A, Group VI A, Group VII B or Group VIII of the Periodic Table.

Claim 19

A pressure sensitive copying assembly comprising a color former layer and a color developer layer carried on the same support, said color developer layer and said color former layer being in relationship such that at the time of pressure sensitive copying, color developer and color former are brought into reactive contact to form a color image. Said color developer layer containing (1) a metal salt of an aromatic carboxylic acid and (2) at least one member selected from the group consisting of ethers and alcohols, said component (1) and said component (2) being present at a proportion sufficient to increase the color-developing ability of said color developer and said color former.

Claim 20

A pressure sensitive copying assembly comprising a color former layer and a color developer layer carried on the same support, said color developer layer and said color former layer being in relationship such that at the time of pressure sensitive copying, color developer and color former are brought into reactive contact to form a color image. Said color developer layer containing (1) a metal salt of an aromatic carboxylic acid and (2) at least one member selected from the group consisting of ethers and alcohols, said component (1) and said component (2) being present at a proportion sufficient to increase the color-developing ability of said color developer and said color former.

Claim 21

The pressure sensitive copying assembly of claim 17 wherein said color developer layer contains from 10 to 250 parts by weight of said ether and alcohol per 100 parts by weight of said aromatic carboxylic acid and wherein said color developer layer is present on said support at a level of at least 0.1 g/m2 as the metal salt of the aromatic carboxylic acid.

Claim 22

The pressure sensitive copying assembly of claim 18, wherein said metal of said metal salt of an aromatic carboxylic acid is a member of Group I B, Group II A, Group II B, Group III B, Group IV A, Group VI A, Group VII B or Group VIII of the Periodic Table.