Weather resistant exterior film composite
AssigneeCPFilms Inc.
InventorsAnthony B. Port, Scott E. Pickett, Steven A. Barth
Life of this patent
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Abstract
This invention relates to film composites with a single coating of hard coat material which have a significant improved adhesion together with improved weather resistance while also increasing resistance to abrasion and cracking. In one embodiment, this film composite is comprised of a transparent base sheet having on one side thereof a weather resistant hard coat comprised of: at least one multifunctional acrylate monomer or oligomer; a dual-curable resin comprising an aliphatic urethane acrylate resin having isocyanate functional groups and an aliphatic urethane acrylate having hydroxyl functional groups; an ultraviolet (UV) stabilizer; and a photoinitiator.
Claims19
A weather resistant film composite comprising:
- a base sheet comprising at least one polyester film layer, the polyester film layer having an exterior surface;
- and
- a dual-cured hard coat layer disposed on the exterior surface of the polyester film layer, wherein the dual-cured hard coat is formed from a composition comprising:
- a multifunctional acrylate;
- an aliphatic urethane acrylate resin having isocyanate functional groups and an isocyanate content of about 6.5 to about 7 percent, as measured in accordance with DIN-EN ISO-11 909;
- an aliphatic urethane acrylate resin having hydroxyl functional groups and a hydroxyl value of about 75 to about 110 mg KOH/g;
- an ultraviolet stabilizer;
- and
- a photoinitiator;
- wherein the dual-cured hardcoat layer is adhered to the exterior surface of the polyester film layer of the base sheet without the need for a second hard coat or primer layer.
A hard coat composition for improving the weather and abrasion resistance of a base sheet with a polyester film layer as an exterior surface of one side of the base sheet, comprising:
- a multifunctional acrylate selected from the group consisting of:
- dipentaerythritol pentaacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, ditrimethylolpropane tetraacrylate, trimethylolpropane triacrylate, tricyclodecane dimethanol diacrylate, 1,6-hexanediol diacrylate, cyclohexane dimethanol diacrylate, dioxane glycol diacrylate, and combinations thereof;
- and
- dual-curable resin comprising:
- an aliphatic urethane acrylate resin having isocyanate functional groups has an isocyanate content of about 6.5 percent to about 7.0 percent, as measured in accordance with DIN-EN ISO-11 909;
- and
- an aliphatic urethane acrylate resin having hydroxyl functional groups has a hydroxyl value of about 75 to about 110 mg of KOH/q;
- wherein the ratio of isocyanate functional groups to hydroxyl functional groups is about 1.1 to 1.
A weather resistant film composite comprising:
- a base sheet comprising at least one polyethylene terephthalate film layer, the film layer having an exterior surface;
- and
- a dual-cured hard coat disposed on the exterior surface of the film layer, wherein the dual-cured hard coat is formed from a composition comprising:
- a multifunctional acrylate;
- an aliphatic urethane acrylate resin having isocyanate functional groups and an isocyanate content of about 6.5 to about 7 percent, as measured in accordance with DIN-EN ISO-11 909;
- an aliphatic urethane acrylate resin having hydroxyl functional groups and a hydroxyl value of about 75 to about 110 mg KOH/g;
- an ultraviolet stabilizer;
- and
- a photoinitiator;
- wherein the dual-cured hardcoat layer is adhered to the exterior surface of the polyethylene terephthalate film layer of the base sheet without the need for a second hard coat or primer layer.
Dependencies are inferred from the claim text.