Radiation curable coating for film structure
AssigneeMartin Processing, Inc.
InventorWilliam P. Hodnett, III
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Abstract
The present invention relates to a unique radiation curable coating formulation used in the manufacture of window films. The coating composition is a mixture of radiation polymerizable monomers. The mixture includes a triacrylate or a tetraacrylate and acrylic acid. The thickness of the coating after polymerization ranges between about 1 and 2.5 microns. The coating can be applied to metal substrates and is used to achieve a superior abrasion resistant coating having optimum infrared absorption, while using high infrared absorption components in the coating mixture. Typically, the coating is applied to metal, for example, to aluminum substrates used in the fabrication of insulating window film or window structures. A process for applying the coating to such substrates is also disclosed.
Claims29
A radiation curable coating for a film structure, comprising a coating composition of a mixture of radiation polymerizable monomers comprising a triacrylate or tetraacrylate monomer and acrylic acid, said coating adhered to a substrate, the thickness of said coating after polymerization ranging between about 1 and about 2.5 microns, whereby an abrasion resistant coating having substantially reduced infrared absorption is obtained.
A window film comprising a radiation curable coating composition of a mixture of radiation polymerizable monomers consisting essentially of pentaerythritol tetraacrylate having a concentration of at least about 50% by weight of the mixture, and acrylic acid having a concentration from about 10% to about 50% by weight of the mixture, a metal substrate adhered to the coating composition and to a window film, the thickness of the coating after polymerization ranging between about 1 and about 2.5 microns, whereby an abrasion resistant, low infrared absorption insulating window is obtained.
A radiation curable coating for a film structure, comprising a coating composition of a mixture of radiation polymerizable monomers comprising a triacrylate or tetraacrylate monomer and acrylic acid, said coating adhered to a substrate, the thickness of said coating after polymerization being at least about 1 micron, whereby an abrasion-resistant coating is obtained.
A process for fabricating a film structure, comprising the steps of preparing a coating composition of a mixture of radiation polymerizable monomers comprising a triacrylate or tetraacrylate monomer and acrylic acid;
- applying the mixture to a metal or metal compound substrate;
- coating the substrate to a thickness after polymerization between about 1 and about 2.5 microns;
- and radiation polymerizing the coating to obtain a film structure.
Dependencies are inferred from the claim text.