Did You Know: UMEX maleated polypropylene coupling agents are unique due to their high acid number. Many competitive maleated coupling agents on the market today contain only 1% maleic anhydride content. However, UMEX contains significantly more. This permits lower addition levels of UMEX, resulting in lower cost. Applications include glass fiber reinforcement, Wood-Polymer-Composites and polymer blend compatibilization. Samples available.