Resins for bulk topcoat
View Patent ↗A topcoating ( 14 ) is disclosed for a face material ( 12 ) which exhibits desirable ink anchorage, anti-pinholing properties, moisture/water resistance, optical characteristics and/or anti-blocking properties. In one embodiment, the topcoating comprises a formulation of polyurethane and polyurethane acrylate. Suitably, the polyurethane is an aliphatic polyurethane and/or the polyurethane acrylate is an aliphatic polyurethane acrylate. In one suitable embodiment, either or both the polyurethane and polyurethane acrylate are water dispersible. In a further embodiment, suitably, the polyurethane is a polyether urethane. Suitably, the formulation may further include a crosslinker, e.g., a water soluble or water dispersible crosslinker.
1. A printable or print receptive topcoating for a face material, said topcoating comprising:
a polyether urethane;
a polyurethane acrylate;
a crosslinker, wherein the crosslinker comprises an amount in a range of from about 2 parts to about 15 parts based on 100 parts total solids; and
an anti-blocking additive,
wherein the polyurethane is a water dispersible polyurethane.
2. The printable or print receptive topcoating as claimed in claim 1 , in which the polyurethane acrylate is an aliphatic polyurethane acrylate.
3. The printable or print receptive topcoating as claimed in claim 1 , in which the polyurethane acrylate is a water dispersible polyurethane acrylate.
4. The printable or print receptive topcoating as claimed in claim 1 , wherein the polyurethane acrylate has a functionality of two or three.
5. The printable or print receptive topcoating as claimed in claim 1 , in which the crosslinker is water soluble or water dispersible.
6. The printable or print receptive topcoating as claimed in claim 1 , in which the crosslinker is an aziridine crosslinker.
7. The printable or print receptive topcoating as claimed in claim 1 , wherein the crosslinker comprises an amount of the topcoating greater than or equal to about 4 parts based on 100 parts total solids.
8. The printable or print receptive topcoating as claimed in claim 1 , wherein the crosslinker comprises an amount of the topcoating in a range of from about 4 part to about 7 parts based on 100 parts total solids.
9. The printable or print receptive topcoating as claimed in claim 1 , wherein the topcoating further comprises:
a silicate dispersion.
10. The printable or print receptive topcoating as claimed in claim 1 , wherein the topcoating further comprises a slip additive.
11. The printable or print receptive topcoating as claimed in claim 1 , having a sheet or rolled construction formed on a surface thereof.
12. The printable or print receptive top coating of claim 11 , wherein the sheet or rolled construction includes a face material that has the topcoating formed on a print receiving side thereof.
13. The printable or print receptive top coating of claim 12 , wherein the sheet or rolled construction further comprises:
a release liner, said face material being releasably adhered on its back side to the release liner via an adhesive, said back side of the face material being opposite the print receiving side thereof.
14. The printable or print receptive top coating of claim 13 , wherein the adhesive is a pressure sensitive adhesive.
15. The printable or print receptive top coating of any one of claim 12 , wherein the face material comprises at least one of a laminate, a film or a paper.
16. The printable or print receptive top coating of any one of claim 12 , wherein the face material comprises polypropylene.
17. The printable or print receptive top coating of claim 16 , wherein the polypropylene is bi-axially oriented.
18. The printable or print receptive top coating any one of claim 12 , wherein the face material comprises a metalized paper.
19. The printable or print receptive top coating of claim 18 , wherein the metalized paper includes at least one metal surface and the topcoating is formed on said metal surface.