Preparation method of calcium acetylacetonate special for PVC (polyvinyl chloride) thermal stabilizers

• Main Authors: BAO YU, LIU XIN, GUO XIANGRONG
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2019
• 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 calcium acetylacetonate special for PVC (polyvinyl chloride) thermal stabilizers. The preparation method includes subjecting acetylacetone, calcium hydroxide, stearic acid and water to reaction under high-speed dispersion in the mass ratio of 100:(38.5-41):(1.0-1.2):(8-10) before coating, to be specific, subjecting calcium hydroxide and part of waterto reaction for activation, adding acetylacetone to allow reacting while the rest of water is added slowly so as to obtain calcium acetylacetonate under controlled reaction speed and temperature, adding stearic acid to subject the as-formed calcium acetylacetonate to surface coating modification, and stirring until water vaporizes completely to obtain modified calcium acetylacetonate. The preparation method is simple, the purity is high, the cost is low, no wastewater or residue is produced, and the preparation method is energy efficient and environmentally friendly; compared with calcium acetylacetone from other pro