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原文传递 PMMA (Polymethymethacrylate) Retro-Reflective Beads for Traffic Paints. Final rept.

题名：	PMMA (Polymethymethacrylate) Retro-Reflective Beads for Traffic Paints. Final rept.
作者：	DURANT, Y. G.
关键词：	Paints-; Beads-; Vehicular-traffic-control; Retroflectivity-.;Polymethyl-methacrylate; Pavement-markings; Crosslinking-Chemistry; Surfaces-; Coatings-; Wear-resistance; Research-program.
摘要：	This cooperative research program studied the potential of polymethymethacrylate (PMMA) beads to act as a substitute for glass beads when their surface chemistry is modified to react (crosslink) with the binder chemistry. The field testing of these beads was carried in two separate years, with 3 sites during a first year and a single site during a second year. The project was successful in achieving its goal of developing a novel type of traffic coating with improved wear performance. More specifically, it completed the development of a process and recipe to effectively modify the surface of PMMA beads in order to obtain chemical crosslinking of the beads with a paint binder containing acetoacetate function. It also completed the evaluation of these novel beads in reference to conventional traffic coating under accelerated conditions, after several attempts, and yielded clear evidence that the novel traffic coating has significantly higher wear resistance over conventional coatings. Application of the novel coatings was similar to the conventional system, and requires very limited equipment modification.
报告类型：	科技报告