High index and high impact resistant poly(thio)urethane/urea material, method of manufacturing same and its use in the optical field

US8822623B2 · kind B2 · utility

Assignee

• Essilor International (Compagnie Generale d'Optique) · FR

Inventors

• Fadi O. Adileh · St. Petersburg, US
• Aref Jallouli · Midland, US
• Peiqi Jiang · Dallas, US
• Joey Oliveros Obordo · Sanford, US
• Yassin Turshani · Largo, US
• Steven Weber · Carrollton, US

Key dates

• Filing date: Jul 16, 2010
• Grant date: Sep 2, 2014
• Expiry date: Sep 30, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/5072
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A transparent, non elastomeric, high refractive index, impact resistant poly(thio)urethane/urea material comprising the reaction product of: a) at least one (α, ω)-diiso(thio)cyanate cycloaliphatic or aromatic polysulfide prepolymer, and b) at least one aromatic primary diamine, in an equivalent molar ratio amine function/iso(thio)cyanate function ranging from 0.5 to 2, wherein, said prepolymer and diamine are free from disulfide (—S—S—) linkage and wherein the (α, ω)-diiso(thio)cyanate polysulfide prepolymer is the reaction product of at least one cycloaliphatic or aromatic diiso(thio)cyanate and at least one (α, ω)-diol prepolymer.