Mar 02, 2016 · APR Showcase highlights HDPE-PPpatibilizer, advanced PET. Published: March 2, 2016. Updated: March 29, 2017. March 2, 2016. by Jared Paben. website builder. Dow Chemical Co. says its newpatibilizer allows reclaimers to get improved properties from PE-PP mixes, making it possible to move the material into higher-value applications.