Transparent films, compositions, and method of manufacture thereof

US7119140B2 · kind B2 · utility

Inventors

• Ronald Basham · Evansville, US
• Gheorghe Cojocariu · Evansville, US
• Robert R. Gallucci · Greenwood, US
• Anshu Ghosal · New Delhi, IN
• Emine Elif Gurel · Evansville, US
• Grant Hay · Niskayuna, US

Key dates

• Filing date: Jul 22, 2004
• Grant date: Oct 10, 2006
• Expiry date: Jul 22, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2369/00
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A film comprising in admixture a thermoplastic resin component comprising a thermoplastic resin component and a glass having a refractive index within 0.04 of the thermoplastic resin component, wherein the film has a haze of less than about 20%, total transmittance of greater than about 70%, and a coefficient of thermal expansion of about 20 to about 80 um/m/° C. measured over a temperature range of 20 to 70° C. The films are of particular utility in optical applications such as light diffuser films.