Pavement markings containing transparent non-vitreous ceramic microspheres
作者： Rogers C O Minnesota Mining And Lange
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摘要: Pavement marking comprising ceramic microspheres held by a binder, said being solid, transparent, non-vitreous, particles which serve as lens elements in the retroreflective pavement markings. The formed various sol gel techniques are characterized having: A. at least one metal oxide phase; and B. an average minimum dimension of up to 125 micrometers. inventive markings retain reflectivity for surprisingly long time.
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