Preparation method of special active calcium carbonate filler for PVC (polyvinyl chloride)

• Main Authors: HUANG ZHIQIN, ZHU YONG, MA WENZHUO, LU FANGYAN, HUANG YUANZHEN, LU QIAOLI, WANG ZHUXIAN
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2024
• 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 preparation method of a special active calcium carbonate filler for PVC (Polyvinyl Chloride), which comprises the following steps: carrying out digestion reaction by taking quicklime as a raw material, adding an additive rubidium hydroxide, and introducing carbon dioxide for reaction to obtain a submicron calcium carbonate whisker solution; the method comprises the following steps: carrying out digestion reaction by taking quicklime as a raw material, adding potassium carbonate into a suspension, transferring the suspension to a carbonizer, and introducing carbon dioxide for reaction to obtain a rice-grain-shaped calcium carbonate solution; the preparation method comprises the following steps: uniformly mixing and stirring submicron calcium carbonate whiskers and rice-grain-shaped calcium carbonate according to a ratio of 4: 1 to obtain mixed calcium carbonate, adding a surfactant compounded by isopropoxy triphthalate and hydroxymethyl cellulose, stirring at a high speed, drying, cru