LIGHTWEIGHT POLYPROPYLENE COMPOSITE COMPOSITION WITH EXCELLENT ADHESION WITH PAINT WITHOUT A PRIMER TREATMENT, AND HAVING EXCELLENT COATABILITY AND IMPACT RESISTANCE, AND A MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A polypropylene composite composition is provided to have excellent mechanical properties such as impact resistance, bending strength, and excellent physical properties such as thermal resistance, electric properties, etc.;CONSTITUTION: A polypropylene composite composition comprises 80-90 parts by weight of polypropylene substrate, 5-20 parts by weight of alpha-olefin copolymer, 1-2.5 parts by weight of a polar group-containing modified resin, 0.5-3.0 parts by weight of a nano inorganic additive, and 0.05-0.5 parts by weight of an inorganic modifier. The nano inorganic additive uses silica as dry silica, wherein the dry silica comprises an inorganic modifier dipped inside. The inorganic modifier is selected from ampholyte, polyhydric alcohols, organic silanes, or a mixture thereof.;COPYRIGHT KIPO 2013;[Reference numerals] (P1) Step of manufacturing modified master batch by mixing 25-50 parts by weight of acrylate-based copolymer and 5-20 parts by weight of surface-treated nano inorganic based additives with respect to 100 parts by weight of alpha-olefin copolymer; (P2) Step of manufacturing a pellet shape by melting 1-2.5 parts by weight of polar group-containing modified resin and 5-10 parts by weight of modified master batch with respect to 80-90 parts by weight of polypropylene base by using extruder under die temperature of 170-190 °C and screw rate of 45-60 rpm