Desensitizing composition
AssigneeFuji Photo Film Co., Ltd.
InventorsAkio Miyamoto, Hiroharu Matsukawa
Life of this patent
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Abstract
A desensitizing composition for a color developer capable of coloring a substantially colorless color former, which desensitizing composition contains a compound represented by the following general formula (I) ##STR1## wherein R has from 2 to 20 carbon atoms and represents an alkyl group, an alkenyl group, an aryl group, an aralkyl group or a ##STR2## group; m is 0 or an integer of 1 to 3; n is an integer of 2 to 6; the sum of a, b and c is an integer of 3 to 100, the sum of a, b, c and d is an integer of 4 to 100; the sum of p, q and r is an integer of 3 to 100; and the sum of p, q, r and s is an integer of 4 to 100.
Claims11
In a desensitizing composition for a color developer capable of coloring a substantially colorless color former including a natural or synthetic high molecular weight compound and a pigment, the improvement which comprises said composition containing a compound obtained by reacting an amine with propylene oxide and ethylene oxide represented by the following general formula (I) ##STR9## wherein R has 2 to 20 carbon atoms and represents an alkyl group, an alkenyl group, an aryl group, an aralkyl group or a ##STR10## group;
- m is 0 or an integer of 1 to 3;
- n is an integer of 2 to 6;
- the sum of a, b and c is an integer of 3 to 100;
- the sum of a, b, c and d is an integer of 4 to 100;
- the sum of p, q and r is an integer of 3 to 100;
- the sum of p, q, r and s is an integer of 4 to 100 and the molar ratio of propylene oxide moieties to ethylene oxide moities is 0.2 to 20.
A method for desensitizing a color developer capable of coloring a substantially colorless color former comprising contacting a color developer with a composition containing a compound obtained by reacting an amine with propylene oxide and ethylene oxide represented by the following general formula (I) ##STR11## wherein R has 2 to 20 carbon atoms and represents an alkyl group, an alkenyl group, an aryl group, an aralkyl group or a ##STR12## group;
- m is 0 or an integer of 1 to 3;
- n is an integer of 2 to 6;
- the sum of a, b and c is an integer of 3 to 100;
- the sum of a, b, c and d is an integer of 4 to 100;
- the sum of p, q and r is an integer of 3 to 100;
- and the sum of p, q, r and s is an integer of 4 to 100 and the molar ratio or propylene oxide moieties to ethylene oxide moieties is 0.2 to 20.
Dependencies are inferred from the claim text.