Polymers with improved ESCR for blow molding applications

• Main Authors: ROHATI VIVEK, GRECO JEFFREY F, ASKEW, JIM, B, YANG QING, HLAVINKA MARK L
• Format: Patent
• Language: Chinese; English
• Published: 25.03.2022
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present application relates to polymers with improved ESCR for blow molding applications. Disclosed herein are vinyl polymers that are generally characterized by a density greater than 0.954 g/cm3, a high load melt index in the range of 10 to 45 g/10 min, a high load melt index to melt index ratio in the range of 175 to 600, a rheological slope parameter in the range of 0.15 to 0.30, and an ESCR in 10% igepal exceeding 800 hours. These polymers have the beneficial processability and die swell characteristics of chromium-based resins, and also have improved stiffness and stress crack resistance, and are useful in blow molding and other end-use applications. 本申请涉及用于吹塑应用的具有改进的ESCR的聚合物。本文公开乙烯基聚合物，其总体上特征在于大于0.954g/cm3的密度、在10到45g/10min范围内的高负荷熔融指数、在175到600范围内的高负荷熔融指数与熔融指数比、在0.15到0.30范围内的流变斜率参数以及超出800小时的10％igepal中的ESCR。这些聚合物具有铬基树脂的有益的可加工性和离模膨胀特征，而且具有改进的刚性和耐应力开裂性，并且可用于吹塑及其它最终用途应用中。