DECALCIFICATION METHOD OF POLYMER FOR REMOVING METAL COMPONENT FROM POLYMER SOLUTION BY CONTACTING THE SOLUTION WITH SILICA GEL HAVING SPECIFIC RANGE OF SIZE, PORE VOLUME AND SPECIFIC SURFACE AREA, AND PREPARATION METHOD OF POLYMER USING POLYMER SOLUTION OBTAINED BY THE METHOD

• Main Authors: IIDA MASASHI, TAKEMORI TOSHIFUMI, KUDO MASAAKI, TAKAYA YOSHIAKI
• Format: Patent
• Language: English; Korean
• Published: 07.03.2005
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PURPOSE: Provided are a method for decalcifying a polymer to remove a metal component from a solution containing a polymer more effectively, and a method for preparing a polymer containing no metal component with a high purity by using a polymer solution obtained by the method. CONSTITUTION: A solution containing a polymer is contacted with a silica gel which contains 4 wt% or more of moisture and has an average diameter of 500 micrometers or less, a pore volume of 0.1-2 ml/g and a specific surface area of 300-1,500 m2/g, to remove the metal component from the polymer solution. Preferably the polymer solution is prepared by a homogeneous system catalyst using at least one kind of organoaluminum compound, and the homogeneous system catalyst is the product of a metallocene compound with an organoaluminum compound or an aluminoxane. Preferably the polymer is a homopolymer or copolymer of an α-olefin or an aromatic vinyl compound, or a polymer of an α-olefin and an olefin having at least one cyclic structure.