Low-gloss dry-erase coating formulation
View Patent ↗An EB (electron beam) or UV (ultra violet) curable, low-gloss, dry-erase coating formulation for static and electronic whiteboards is disclosed. The coating contains an acrylate silica blend, an aliphatic urethane acrylate or a polyester acrylate, a polyfunctional reactive diluent and at least one photoinitiator.
1. A low-gloss dry-erase hardcoat comprising:
a substrate; and
a low-gloss coating formulation covering at least a portion of said substrate, wherein said coating formulation comprises:
an acrylate silica blend;
an acrylate selected from a group consisting of an aliphatic urethane acrylate and a polyester acrylate;
a polymeric dispersant; and
a polyfunctional reactive diluent.
2. A low-gloss dry-erase hardcoat according to claim 1 , wherein said coating formulation further comprises at least one photoinitiator.
3. A low-gloss dry-erase hardcoat according to claim 1 , wherein at least one side of the substrate is pre-treated.
4. A low-gloss dry-erase hardcoat according to claim 1 , wherein said substrate comprises polymeric material.
5. A low-gloss dry-erase hardcoat according to claim 1 , wherein said substrate is selected from a group consisting of polyethylene terephthalate, polycarbonate, melamine, porcelain, coated paper, metal, and glass.
6. A low-gloss dry-erase hardcoat according to claim 1 , wherein the coating weight of said coating formulation on said substrate is between about 1 and 10 lbs/ream.
7. A low-gloss dry-erase hardcoat according to claim 1 , wherein said coating formulation exhibits a gloss of less than about 40 gloss units measured at 60 degrees.
8. A low-gloss dry-erase hardcoat according to claim 1 , wherein said coating formulation exhibits a gloss of less than about 30 gloss units measured at 60 degrees.
9. A low-gloss dry-erase static whiteboard comprising:
a backing board;
a substrate covering at least a portion of said backing board; and
a low-gloss coating formulation covering at least a portion of said substrate, wherein said coating formulation comprises:
an acrylate silica blend;
an acrylate selected from a group consisting of an aliphatic urethane acrylate and a polyester acrylate;
a polyfunctional reactive diluent; and
a polymeric dispersant;
characterized in that said coating formulation exhibits a gloss of less than about 40 gloss units measured at 60 degrees.
10. A low-gloss dry-erase static whiteboard according to claim 9 , wherein said coating formulation further comprises at least one photoinitiator.
11. A low-gloss dry-erase static whiteboard according to claim 9 , wherein said backing board comprises polymeric material.
12. A low-gloss dry-erase static whiteboard according to claim 9 , wherein said backing board is selected from a group consisting of polyethylene terephthalate, polycarbonate, melamine, porcelain, particleboard, coated paper, glass, wood, and metal.
13. A low-gloss dry-erase electronic whiteboard, wherein a portion of said electronic whiteboard is coated with a coating formulation comprising:
an acrylate silica blend;
an acrylate selected from a group consisting of an aliphatic urethane acrylate and a polyester acrylate;
a polyfunctional reactive diluent;
a polymeric dispersant; and
a polymeric dispersant.
14. A low-gloss dry-erase electronic whiteboard according to claim 13 , wherein said coating formulation further comprises at least one photoinitiator.
15. A low-gloss dry-erase hardcoat comprising:
a substrate; and
a low-gloss coating formulation covering at least a portion of said substrate, wherein said coating formulation comprises:
an acrylate silica blend;
an acrylate selected from a group consisting of an aliphatic urethane acrylate and a polyester acrylate; and
a polyfunctional reactive diluent;
characterized in that said coating formulation exhibits a gloss of less than about 40 gloss units measured at 60 degrees.
16. A low-gloss dry-erase electronic whiteboard, wherein a portion of said electronic whiteboard is coated with a coating formulation comprising:
an acrylate silica blend;
an acrylate selected from a group consisting of an aliphatic urethane acrylate and a polyester acrylate;
a polyfunctional reactive diluent; and
a polymeric dispersant;
characterized in that said coating formulation exhibits a gloss of less than about 40 gloss units measured at 60 degrees.
17. A substrate, coated by the process of applying a low-gloss coating formulation that includes an acrylate silica blend, an acrylate selected from a group consisting of an aliphatic urethane acrylate and a polyester acrylate, a polyfunctionalreactive diluent, at least one photoinitiator, a polymeric dispersant; and a solvent on a pre-treated substrate;
drying said solvent from said coating formulation; and
exposing said coating formulation on said pre-treated substrate to a radiation selected from a group consisting of electron beam and ultra violet radiation.