|  | The inherent tack, aging resistance and low permeability of butyl-type polymers account for their use in various adhesive applications. A number of partially cross-linked butyl rubbers are commercially available. Many of these are specifically produced for the adhesives and sealants markets. The wide selection of completely compatible materials in the family of isobutylene polymers permits the knowledgeable compounder to achieve a wide range of properties.
Valve cement based on EXXON Bromobutyl exhibits good adhesion for EXXON Butyl / EXXON Chlorobutyl blend inner tube compounds with both NR and butyl-based procured valves. Chlorobutyl can be used alone or in blends with other polymers to achieve special properties in contact cement and is well suited for sealant tapes because of its vulcanization and heat treatment capabilities, tack, flexibility and heat resistance. Extrudable compounds possessing these characteristics were developed for use as sealing tapes for automotive windshields, pre-engineered buildings and double-glazed windows. The windshield sealing tape offers good adhesion to metal and glass as well as softness for ease in installation.
Butyl rubber can be used in formulations for adhesive for transparent tape, hot melt pressure sensitive adhesives, mastic for pipe wrap tape and vinyl floor tile adhesives. Butyl rubber can also be used for semi-conducting 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 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. Chlorobutyl can be used alone or in blends with other polymers to achieve special properties in pressure sensitive adhesives.
For more information about the grades that go into the Adhesives applications, click on the ExxonMobil products below.
EXXON Butyl
EXXON Bromobutyl
EXXON Chlorobutyl
For additional information about our polymers, please contact us at 1-800-231-6633 or 281-870-6000.
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