Color-changing materials and multiple component materials having a color-changing composition
AssigneeKimberly-Clark Worldwide, Inc.
InventorsXuedong Song, Kaiyuan Yang, Stephanie M. Martin, Maia Bageant
Life of this patent
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Abstract
The present invention relates to a color-changing material and to a multiple-component material that includes a color-changing composition. The color-changing materials and color-changing compositions are capable of changing color in order to indicate a change in condition, such as a change in pH. The color-changing materials and color-changing compositions include a hydrogel-forming composition, a charged colorant and a pH adjuster. The hydrogel-forming composition includes at least one charged species.
Claims18
A color-changing material comprising:
- a hydrogel-forming composition comprising a charged hydrogel-forming polymer, the hydrogel-forming composition containing at least one charged species;
- a charged colorant;
- a pH adjuster;
- and
- a volatile solvent;
- wherein the charged hydrogel-forming polymer is selected from poly(ethylene glycol)-grafted cationic hydrogels;
- a copolymer of 2-hydroxyethyl methacrylate (HEMA) and methacrylamide propyltrimethylammonium chloride;
- a crosslinked cationic copolymer of vinylpyrrolidone (VP) and 3-dimethylaminopropyl(meth)acrylamide (DMAPMA) monomer;
- (3-acrylamidopropyl)-trimethylammonium chloride (APTMAC1) monomer crosslinked with a neutral crosslinker N,N-methylenebisacrylamide;
- crosslinked hydrophobically-modified dialkyldiallylammonium salts;
- a vinyl ether of monoethanolamine;
- and copolymerization of N,N,N,N-tetrallyl piperazinium dibromide (TAP) with N,N-diallyl morpholinium bromide (DAM).
A multiple-component material, the material comprising:
- a substrate, the substrate having a hydrogel-forming layer, wherein the hydrogel-forming layer includes a color-changing composition, the color-changing composition comprising
- a hydrogel-forming composition comprising a charged hydrogel-forming polymer;
- a charged colorant;
- a volatile solvent;
- and
- a pH adjuster;
- wherein the charged hydrogel-forming polymer is selected from poly(ethylene glycol)-grafted cationic hydrogels;
- a copolymer of 2-hydroxyethyl methacrylate (HEMA) and methacrylamide propyltrimethylammonium chloride;
- a crosslinked cationic copolymer of vinylpyrrolidone (VP) and 3-dimethylaminopropyl(meth)acrylamide (DMAPMA) monomer;
- (3-acrylamidopropyl)-trimethylammonium chloride (APTMAC1) monomer crosslinked with a neutral crosslinker N,N-methylenebisacrylamide;
- crosslinked hydrophobically-modified dialkyldiallylammonium salts;
- a vinyl ether of monoethanolamine;
- and copolymerization of N,N,N,N-tetrallylpiperazinium dibromide (TAP) with N,N-diallyl morpholinium bromide (DAM).
A method of printing on a substrate, comprising the steps of:
- providing a substrate to be printed upon;
- and
- applying an ink material onto the substrate, wherein the ink material includes a hydrogel-forming composition comprising a charged hydrogel-forming polymer, the hydrogel-forming composition containing at least one charged species;
- a charged colorant;
- a pH adjuster;
- and
- a volatile solvent;
- wherein the charged hydrogel-forming polymer is selected from poly(ethylene glycol)-grafted cationic hydrogels;
- a copolymer of 2-hydroxyethyl methacrylate (HEMA) and methacrylamide propyltrimethylammonium chloride;
- a crosslinked cationic copolymer of vinylpyrrolidone (VP) and 3-dimethylaminopropyl(meth)acrylamide (DMAPMA) monomer;
- (3-acrylamidopropyl)-trimethylammonium chloride (APTMAC1) monomer crosslinked with a neutral crosslinker N,N-methylenebisacrylamide;
- crosslinked hydrophobically-modified dialkyldiallylammonium salts;
- a vinyl ether of monoethanolamine;
- and copolymerization of N,N,N,N-tetrallyl piperazinium dibromide (TAP) with N,N-diallyl morpholinium bromide (DAM).
Dependencies are inferred from the claim text.