Water removable compositions and applications thereof
View Patent ↗In one aspect, water removable compositions are described herein, including for use in various printing applications. In some embodiments, a composition described herein comprises 50-95% by weight alcohol wax having the formula CH 3 (CH 2 ) n OH, wherein n is an integer from 15 to 40; 5-50% by weight tackifier; and 0.5-5% by weight colorant. In other instances, a composition described herein comprises 50-95% by weight carboxylic acid wax having the formula CH 3 (CH 2 ) m COOH, wherein m is an integer from 14 to 40; 5-50% by weight tackifier; and 0.5-5% by weight colorant. Additionally, in some cases, the tackifier of a composition described herein comprises a rosin acid, a rosin ester, a rosin alcohol, or a mixture or combination thereof. Further, the solubility of a colorant in a composition described herein can be characterized by a spectral strength delta value of 5% or less or 3% or less.
1. A composition comprising:
50-95% by weight alcohol wax;
5-50% by weight tackifier; and
0.5-5% by weight colorant,
wherein the solubility of the colorant in the composition is characterized by a spectral strength delta value of 5% or less.
2. The composition of claim 1 , wherein the alcohol wax comprises an alcohol having the formula CH 3 (CH 2 ) n OH, wherein n is an integer from 15 to 40.
3. The composition of claim 1 , wherein the alcohol wax is present in the composition in an amount of 60-80% by weight, based on the total weight of the composition.
4. The composition of claim 1 , wherein the tackifier comprises a rosin acid, a rosin ester, a rosin alcohol, or a mixture or combination thereof.
5. The composition of claim 1 , wherein the tackifier is present in the composition in an amount of 10-40% by weight, based on the total weight of the composition.
6. The composition of claim 1 , wherein the colorant comprises an organic dye.
7. The composition of claim 1 further comprising up to 10% by weight inhibitor or stabilizing agent.
8. The composition of claim 1 , wherein the composition has a melting point ranging from about 45° C. to about 80° C.
9. The composition of claim 1 , wherein the composition is water removable from a plastic substrate surface.
10. A method of printing comprising depositing an ink on a plastic substrate, wherein the ink comprises:
50-95% by weight alcohol wax;
5-50% by weight tackifier; and
0.5-5% by weight colorant,
wherein the alcohol wax comprises an alcohol having the formula CH 3 (CH 2 ) n OH, wherein n is an integer from 15 to 40, and wherein the solubility of the colorant in the ink is characterized by a spectral strength delta value of 5% or less.
11. The method of claim 10 , wherein printing is two-dimensional printing.
12. The composition of claim 1 , wherein the tackifier is present in the composition in an amount of 25-35% by weight, based on the total weight of the composition.
13. The composition of claim 1 , wherein the alcohol wax comprises an alcohol having the formula CH 3 (CH 2 ) n OH, wherein n is an integer from 16 to 22.
14. The composition of claim 1 , wherein:
the alcohol wax comprises an alcohol having the formula CH 3 (CH 2 ) n OH, wherein n is an integer from 16 to 22;
the alcohol wax is present in the composition in an amount of 60-80% by weight, based on the total weight of the composition;
the tackifier comprises a rosin acid, a rosin ester, a rosin alcohol, or a mixture or combination thereof;
the tackifier is present in the composition in an amount of 25-40% by weight, based on the total weight of the composition;
the colorant comprises an organic dye; and
the composition has a melting point ranging from 45° C. to 80° C.