EXXPRO elastomers are brominated polymers derived from a copolymer of isobutylene (IB) and p-methylstyrene (PMS).

These copolymers can be prepared in a wide range of monomer ratios and molecular weights. They are subsequently brominated to varying degrees, producing different grades of EXXPRO elastomers.

Bromination occurs selectively on the PMS methyl group, providing a reactive benzylic bromine functionality which is the key to EXXPRO elastomers' vulcanization and modification versatility.

Unique Attributes From:

Fully saturated polyisobutylene backbone

Highly reactive benzylic bromine functionality

Exceptional Combination of:

Temperature resistance

Stability: with greater heat stability than EPDM rubbers

Low permeability and high damping: similar to butyl rubbers

Wide latitude in cure and cocure with a variety of rubbers

Grafting and functionalization reactions

Ozone/weathering resistance

Click to view EXXPRO Specialty Elastomers web page.

  Chemical Resistance Guide

          EXXPRO 3035 RFU*
          EXXPRO 3433 EVA*
          EXXPRO 3433 RFU
          EXXPRO 3745 EVA
*EVA Inclusion film (melting point 93 - 96^°)
*RFU Removable Film Unit. Blue shaded stripable film.

EXXPRO is a trademark of ExxonMobil Chemical Corporation.