Monosubstituted dithiooxamide compounds and their use
First Claim
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1. A construction comprising:
- (a) a first substrate with a surface on which is coated an N-(monosubstituted)dithiooxamide compound;
(b) a second substrate with a surface on which is coated a salt of a transition metal cation with a +2 oxidation state, wherein said second substrate surface is juxtaposed in contact with said coated surface of said first substrate; and
(c) means for separating said N-(monosubstituted)dithiooxamide from reaction with said transition metal cation until said construction is subjected to activating pressure.
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Abstract
This invention concerns monosubstituted dithiooxamides, and a preferred class comprises those wherein the substituent is such that the resulting dithiooxamide derivative is substantially nonvolatile at about room temperature. Preferred materials are those for which when the monosubstituent dithiooxamide is complexed with a transition metal cation, the resulting polymer is substantially a dark, i.e., preferably blue or blue-black color. Carbonless paper constructions involving use of N-(monosubstituted)dithiooxamides to advantage are described.
31 Citations
19 Claims
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1. A construction comprising:
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(a) a first substrate with a surface on which is coated an N-(monosubstituted)dithiooxamide compound; (b) a second substrate with a surface on which is coated a salt of a transition metal cation with a +2 oxidation state, wherein said second substrate surface is juxtaposed in contact with said coated surface of said first substrate; and (c) means for separating said N-(monosubstituted)dithiooxamide from reaction with said transition metal cation until said construction is subjected to activating pressure. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A construction comprising:
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(a) a first substrate with a surface on which is coated an N-(monosubstituted)dithiooxamide compound of the formula;
##STR49## wherein R3 comprises;
(i) an alkyl or aralkyl group having 11 or more carbon atoms;(ii) a group of the structure --R4 --Y--R5 wherein Y is a functional group selected from the group consisting of --N(R6)C(O)--, --C(O)N(R6)--, --N(R6)C(O)O--, --OC(O)N(R6)--, and --N(R6)C(O)N(R7)--, wherein R6 and R7 are independently hydrogen, or an alkyl or aralkyl group having 1 to 12 carbon atoms;
R4 is a divalent alkyl or divalent aralkyl group having 1 to 12 carbon atoms;
R5 is hydrogen, or an alkyl or aralkyl group having 1 to 20 carbon atoms; and
, the total number of carbon atoms in R4, plus R5 is at least 7;
or(iii) a group of the structure --R4 --Y--R5 wherein Y is a functional group selected from the group consisting of --OC(O)--, --C(O)O--, and --OC(O)O--;
R4 is a divalent alkyl or divalent aralkyl group having 1 to 12 carbon atoms;
R5 is hydrogen, or an alkyl or aralkyl group having 1 to 20 carbon atoms; and
, the total number of carbon atoms in R4 plus R5 is at least 9;(b) a second substrate with a surface on which is coated a salt of a transition metal cation with a +2 oxidation state, wherein said surface is juxtaposed in contact with said coated surface of said first substrate; and (c) means for separating said N-(monosubstituted)dithiooxamide from reaction with said transition metal cation until said construction is subjected to activating pressure. - View Dependent Claims (8, 9)
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10. A method of forming an image on a receptor sheet;
- said method comprising;
(a) providing a receptor sheet comprising a surface with a transition metal salt coated thereon; and (b) transferring to said coated surface of the receptor sheet an effective amount of an N-(monosubstituted)dithiooxamide compound. - View Dependent Claims (11, 12, 13, 14, 15)
- said method comprising;
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16. A substrate comprising a surface on which is coated encapsulated N-(monosubstituted)dithiooxamide compound of the formula:
- ##STR53## wherein R3 comprises;
(a) an alkyl or aralkyl group having 11 or more carbon atoms;
or(b) a group of the structure --R4 --Y--R5 wherein; (i) when Y is a functional group selected from the group consisting of --N(R6)C(O)--, --C(O)N(R6)--, --N(R6)C(O)O--, --OC(O)N(R6)--, and --N(R6)C(O)N(R7)--, wherein R6 and R7 are independently hydrogen, or an alkyl or aralkyl group having 1 to 12 carbon atoms;
R4 is a divalent alkyl or divalent aralkyl group having 1 to 12 carbon atoms;
R5 is hydrogen, or an alkyl or aralkyl group having 1 to 20 carbon atoms; and
, the total number of carbon atoms in R4 plus R5 is at least 7;
or(ii) when Y is a functional group selected from the group consisting of --OC(O)--, --C(O)O--, and --OC(O)O--;
R4 is a divalent alkyl or divalent aralkyl group having 1 to 12 carbon atoms;
R5 is hydrogen, or an alkyl or aralkyl group having 1 to 20 carbon atoms; and
, the total number of carbon atoms in R4 plus R5 is at least 9.
- ##STR53## wherein R3 comprises;
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17. A substrate comprising a surface on which is coated encapsulated N-(monosubstituted)dithiooxamide compound of the formula:
- ##STR54## wherein R8 is a suitable substituent such that the dithiooxamide compound is substantially nonvolatile at about 25°
C. - View Dependent Claims (18, 19)
- ##STR54## wherein R8 is a suitable substituent such that the dithiooxamide compound is substantially nonvolatile at about 25°
Specification