Overview

In 1938 DuPont introduced Butacite® , a petrochemical-based, polyvinyl butyral (PVB) plastic for use as an interlayer in safety glass. Butacite® sales grew rapidly because automobile manufacturers were delighted to have a windshield that would retain its strength even in extreme cold, a quality that earlier products had lacked. By the late 1950s, safety glass manufacturers also were exploring non-automotive uses for Butacite® , such as building windows.

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