Polyvinyl butyral

Polyvinyl butyral (CAS 68648-78-2), commonly abbreviated as PVB, is a thermoplastic resin produced by reacting polyvinyl alcohol with butyraldehyde.

Where is Polyvinyl butyral used?

• Safety glass interlayers and architectural coatings: primary binder
• Specialty adhesives: strong substrate adhesion and film flexibility
• Automotive and architectural glazing: laminated between glass panes to produce safety glass
• Wash primers and metal primers: binder with adhesion to bare metal surfaces
• Printing inks: gravure and screen inks for glass, ceramics and foils
• Aerospace structural adhesives and specialty sealants rely on PVB.

Good to know: Compatible with phenolic and epoxy crosslinkers during curing. Grade selection is driven by hydroxyl content and viscosity specifications.

Commercial specifications

• Varying molecular weights and degrees of acetalization
• Bulk and bag packaging