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The inherent tack, aging resistance and low permeability of Exxon butyl rubber, Exxon™ bromobutyl rubber and Exxon™ chlorobutyl rubber support compounders in achieving a wide range of properties in adhesive applications.
Valve cement based on Exxon butyl rubber exhibits good adhesion for Exxon butyl and Exxon chlorobutyl rubber-based innertube compounds with either natural rubber or butyl rubber-based valves.
Chlorobutyl rubber can be used alone or in blends with other polymers to achieve special properties in contact cement. It is well suited for sealant tapes because of its vulcanization and heat-treatment capabilities, tack, flexibility and heat resistance. Extrudable compounds with these characteristics are used in sealing tapes for automotive windshields, pre-engineered buildings and double-glazed windows. The windshield sealing tape offers good adhesion to metal and glass, and provides softness for ease in installation.
Tapes and flooring adhesives
Exxon butyl rubber can be used in adhesive formulations for transparent tape, hot-melt pressure sensitive adhesives, mastic for pipe wrap tape and vinyl floor tile adhesives.
It can also be used for semiconducting electrical splicing tape. A rubber splicing tape must be self-fusing; i.e., when wrapped upon itself, it must fuse to the underlying layer, forming a permanent bond. The self-fusing is a result of compounding and eliminates the need for application of a separate adhesive coat. These compounds have very high tensile strengths and exhibit some degree of recovery or elasticity. Electrical splicing tapes based on Exxon butyl rubber have moisture resistance, outstanding aging resistance and good electrical properties.
Polyisobutylene elastomers have long been successfully used in pressure sensitive adhesives both as primary elastomers and as tackifiers and modifiers. Exxon chlorobutyl rubber can be used alone or in blends with other polymers to achieve special properties in pressure sensitive adhesives.