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 GlasNovations, Butacite, Saflex, S-Lec, and Trosifol.In the structure of PVB resin, there are three functional groups: butyral, hydroxyl and acetyl group. 
• The physical properties of PVB resin can be adjusted by controlling the molecular structure of PVB.