NEW HDPE RESINS AND PRODUCTS WITH IMPROVED PROPERTIES

摘要

The present invention is directed to resin compositions useful for blow molding comprising recycled HDPE, optionally virgin HDPE and an additive selected from the group consisting of LLDPE, thermoplastic elastomers, mixtures of those elastomers and mixtures of LLDPE and at least one of those elastomers. The resin compositions preferably contain from about 0.1 to about 40 weight percent recycled HDPE, from about 0.1 to about 50 weight percent additive with the balance comprising virgin HDPE. The invention further comprises blow molded products produced from the above resins. The invention also provides methods for improving the resistance to environmental stress cracking and/or to drop impact of blow molded products. These improvements are achieved by adding the above additive in an amount sufficient to increase the ESCR and/or impact resistance of the product above that for a similar product comprised of the same resin but not including the additive. In a more preferred embodiment an effective amount of the additive is added to improve the measured characteristic above that characteristic for a similar product of virgin HDPE.