LOW REFRACTIVE INDEX COMPOSITION, ABRASION RESISTANT ANTI-REFLECTIVE COATING, AND METHOD FOR FORMING ABRASION RESISTANT ANTI-REFLECTIVE COATING

• Main Authors: BEKIARIAN, PAUL, GREGORY, KOURTAKIS, KOSTANTINOS
• Format: Patent
• Language: English; French; German
• Published: 07.11.2012
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NANOTECHNOLOGY; NATURAL RESINS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; PHYSICS; POLISHES; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

A low refractive index composition is provided comprising the reaction product of: (i) a fluoroelastomer having at least one cure site; (ii) a multiolefinic crosslinker; (iii) a free radical polymerization initiator; (iv) a nanosilica composite comprising: (iv-a) a plurality of nanosilica particles, and (iv-b) at least one of a hydrolysis and condensation product of an oxysilane having a carbon-carbon double bond, wherein the at least one of a hydrolysis and condensation product is formed by contacting, in the presence of an organic acid and a lower alkyl alcohol, the oxysilane with from about 3 to about 9 moles of water per mole of hydrolyzable functional group bonded to the silicon of the oxysilane. The present invention further provides abrasion resistant anti-reflective coatings formed from these low refractive index compositions and methods for forming abrasion resistant anti-reflective coatings for optical display substrates from these low refractive index compositions.