Colorant stabilizers
AssigneeKimberly-Clark Worldwide, Inc.
InventorsRonald Sinclair Nohr, John Gavin MacDonald
Life of this patent
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Abstract
The present invention comprises colorant stabilizers and a colorant composition which includes a colorant and a colorant stabilizer. The colorant stabilizer imparts light-stability to the colorant so that the colorant does not fade when exposed to electromagnetic radiation such as sunlight or artificial light.
Claims36
A composition comprising a colorant and a stabilizing agent, wherein the stabilizing agent is a porphine.
A composition comprising a colorant and a stabilizing agent, wherein the stabilizing agent is dimethyl amino benzoic acid quat, represented by the following structure:
- ##STR56##
A composition comprising a colorant and a stabilizing agent, wherein the stabilizing agent is a basic fuschin hydrazone, represented by the following structure:
- ##STR57##
A composition comprising a colorant, a molecular includant, and a stabilizing agent, wherein the stabilizing agent is a benzophenone of the general formula:
- ##STR58## wherein R represents one or more substituents selected from the group consisting of hydroxyl groups, alkyl ether groups and sulfonic acid groups.
A method of light-stabilizing a colorant composition, comprising associating a colorant composition with a porphine.
A method of light-stabilizing a colorant composition, comprising associating a colorant composition with a basic fuschin hydrazone represented by the following structure:
- ##STR68##
A method of light-stabilizing a colorant composition, comprising associating a colorant composition with a molecular includant and a benzophenone of the general formula:
- ##STR69## wherein R represents one or more substituents selected from the group consisting of hydroxyl groups, alkyl ether groups and sulfonic acid groups.
A composition comprising a colorant and a stabilizing agent, wherein the stabilizing agent is Cu-meso-tetra-(4-sulfanatophenyl)-porphine, a sodium salt of Cu-meso-tetra-(4-sulfanatophenyl)-porphine or Cu-meso-tetra-(N-methyl-4-pyridyl)-porphine, having the following structures, respectively:
- ##STR71##
A composition comprising a colorant and a stabilizing agent, wherein the stabilizing agent is Co-meso-tetra-(4-sulfanatophenyl)-porphine, a sodium salt of Co-meso-tetra-(4-sulfanatophenyl)-porphine or Co-meso-tetra-(N-methyl-4-pyridyl)-porphine, having the following structures, respectively:
- ##STR72##
A composition comprising a colorant, a molecular includant and a stabilizing agent, wherein the stabilizing agent is a porphine.
A method of light-stabilizing a colorant composition, the method comprising:
- associating a colorant composition with Cu-meso-tetra-(4-sulfanatophenyl)-porphine, a sodium salt of Cu-meso-tetra-(4-sulfanatophenyl)-porphine or Cu-meso-tetra-(N-methyl-4-pyridyl)-porphine, having the following structures, respectively:
- ##STR73##
A method of light-stabilizing a colorant composition, the method comprising:
- associating a colorant composition with Co-meso-tetra-(4-sulfanatophenyl)-porphine, a sodium salt of Co-meso-tetra-(4-sulfanatophenyl)-porphine or Co-meso-tetra-(N-methyl-4-pyridyl)-porphine, having the following structures, respectively:
- ##STR74##
A method of light-stabilizing a colorant composition, the method comprising:
- associating a colorant composition with a molecular includant and a porphine.
Dependencies are inferred from the claim text.