Method for preparing layered hydrotalcite-like PVC heat stabilizer from vermiculite

• Main Authors: ZHANG XIANGKUN, SHEN YIWEN, LIN YANJUN, TIAN WEILIANG, ZHU KAIDI, HOU JINPENG, DING HUIPING, ZHANG KEWEI, YOU HOUMEI, FENG YONGJUN, LI ZHONG, LIU LIJUAN
• Format: Patent
• Language: Chinese; English
• Published: 09.09.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention discloses a method for preparing a layered hydrotalcite-like PVC (polyvinyl chloride) heat stabilizer from vermiculite, which comprises the following steps: pretreating vermiculite, preparing nanoscale vermiculite sheets, adding fluoride, ammonia water and water, and carrying out a series of reactions such as ultrasonic dispersion to prepare layered powder layered hydrotalcite-like and silicon dioxide products, thereby realizing the preparation of a vermiculite functional product. And when the flame retardant is applied to a PVC product, the thermal stability of PVC is improved. The vermiculite-based layered powder product can be directly prepared, reaction and separation are coupled, meanwhile, the function of stripping layered vermiculite is achieved, and the method has the advantages of being low in reaction temperature and low in energy consumption; and the treatment agent fluoride can be recycled, so that the method is suitable for industrial production. According to the preparation method