Method for preparing chlorinated polypropylene resin by aqueous phase suspension method

• Main Authors: GAO CHUANSHAN, JIN SHENGBO, SUN MENG, XIAO BIN, ZHANG DAOTONG
• Format: Patent
• Language: Chinese; English
• Published: 09.12.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention provides a method for preparing chlorinated polypropylene resin through a water phase suspension method. The method comprises the steps of smashing, feeding, chlorination and aftertreatment. In the crushing step, the polypropylene raw material is crushed until the average particle size is less than or equal to 13 microns to obtain the polypropylene superfine powder. According to the invention, a toxic organic solvent is not needed to carry out swelling pretreatment on polypropylene; the chlorinated polypropylene resin prepared by the method is light yellow superfine powder in appearance, the chlorine content is 30-40%, the viscosity (20% toluene 25 +/-1 DEG C) is 260-350 mpa.s, the solubility is greater than or equal to 99.5%, the transparency is greater than or equal to 82%, the volatile matter is less than or equal to 0.45%, the chlorinated polypropylene resin has the advantages of good solubility and high solution transparency, and ink and paint prepared from the chlorinated polypropylene res