Polyvinyl butyral

Polyvinyl butyral (or PVB) is a resin usually used for applications that require strong binding, optical clarity, adhesion to many surfaces, toughness and flexibility. It is prepared from polyvinyl alcohol by reaction with butyraldehyde. The major application is laminated safety glass for automobile windshields. Tradenames for PVB-films include: BUTACITE, SAFLEX, S-Lec, TROSIFOL

Translated from http://de.wikipedia.org/wiki/Polyvinylbutyral

Polyvinylbutyral Butiral de polivinilo Polyvinyle de butyral Polyvinylbutyral