Butyl rubber is an elastomeric polymer that is used in a wide variety of construction adhesives and sealants. Because of its unique properties it also is used in the automotive and food processing industries among others. Butyl adhesives can be applied in a number of different forms. It can be used as a hot melt, solvent solution, preformed tape or gasket, and as a gun-dispensable sealant. Butyl rubber can be used as a primary base resin or as an additive for tack and other desired properties.
RESULTING PROPERTIES
The cohesive strength of butyl adhesives can be improved by the incorporation of high molecular weight PIB. The modification also provides a degree of age resistance for long-term service. A significant application for butyl tape is corrosion protection. The backing is generally polyethylene or flexible polyvinyl chloride filled with carbon black. In these applications the adhesive is applied in a thick mass generally greater than 0.010” thick. The table above describes a formulation for a polyethylene backed, anticorrosion PSA tape.
