发明授权
US08822623B2 High index and high impact resistant poly(thio)urethane/urea material, method of manufacturing same and its use in the optical field 有权
高指数和高耐冲击聚(硫)氨基甲酸酯/脲材料,其制造方法及其在光学领域的应用

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