[EN] HIGH IMPACT POLY(URETHANE UREA) POLYSULFIDES<br/>[FR] POLYSULFURES DE POLY(URETHANNE UREE) HAUTEMENT RESISTANTS
申请人:PPG IND OHIO INC
公开号:WO2003044070A1
公开(公告)日:2003-05-30
The present invention relates to a sulfur-containing polyureaurethane and a method of preparing said polyureaurethane. In an embodiment, the sulfur-containing polyureaurethane when at least partially cured can have a refractive index of at least 1.57,an Abbe number of at least 35 and a density of less than 1.3 grams/cm3. Further, the sulfur-containing polyureaurethane can be prepared by reacting a polyureaurethane prepolymer comprising a polycyanate and at least one hydrogen-containing material, at least one episulfide-containing material; and an amine-containing curing agent.
[EN] PLASTIC SUBSTRATE AND PLASTIC LENS<br/>[FR] SUBSTRAT EN PLASTIQUE ET LENTILLE EN PLASTIQUE<br/>[JA] プラスチック基材、プラスチックレンズ