Flexible nanoparticle optical coating compositions

US11034843B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Claire Hartmann-Thompson · Lake Elmo, US
• Jonathan A. Anim-Addo · New Hope, US
• Justin P. Meyer · Oakdale, US
• Samuel J. Carpenter · Shoreview, US
• Bryan V. Hunt · Anoka, US

Key dates

• Filing date: Dec 27, 2017
• Grant date: Jun 15, 2021
• Expiry date: Feb 28, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K50/858
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Curable, coatable compositions include silane surface-treated inorganic nanoparticles with a high refractive index, and a curable reaction mixture. The curable reaction mixture includes a first (meth)acrylate monomer comprising a high refractive index (meth)acrylate monomer with a refractive index of 1.6 or higher, a second (meth)acrylate monomer comprising a lower refractive index (meth)acrylate monomer with a refractive index of less than 1.6, and at least one initiator. Cured optical coatings prepared from the compositions are optically clear, having a visible light transmission of at least 88% and a haze of 5% or less, and have a refractive index of at least 1.78, and are capable of passing a 10 millimeter mandrel flexibility test.