Extrusion-blowing-grade transparent polypropylene resin and preparation method thereof

• Main Authors: YANG TINGJIE, GOU RONGHENG, LIU YI, HAN LIWANG, CHENG MIN, WU ZHENLIN, WANG YONG, HE HAIKE
• Format: Patent
• Language: Chinese; English
• Published: 24.05.2024
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention belongs to the technical field of polypropylene resin production, and particularly relates to extrusion-blowing-grade transparent polypropylene resin and a preparation method thereof.The preparation method comprises the following steps that 1, a rare earth modifier WT is added into an alpha nucleating agent and stirred to 100-105 DEG C, and the modified alpha nucleating agent is prepared; (2) mixing the rare earth modifier WT modified alpha nucleating agent, a main antioxidant, an auxiliary antioxidant and an acid-binding agent to obtain a nucleating agent mixture; (3) adding polypropylene into the nucleating agent mixture to obtain a polypropylene composition mixture; the composition mixture is put into a double-screw extruder for extrusion granulation, and extrusion-blowing-grade transparent polypropylene granules are obtained; wherein the rare earth modifier WT contains metal acid ester pyrophosphate and a light rare earth oxide or a light rare earth organic complex. By using the rare earth m