Polyvinyl Butyral

An adhesive (Monsanto’s Butvar) that may be applied over a polyurethane base to create a heat- or solvent-activated bondable construction for magnet wire. It is referred to as a self-bonding polyurethane: thermal class 105. Retains the solder stripping characteristics of polyurethane base. The self-bonding polyurethane film is generally produced in number 30 AWG wire and finer round copper wire.