| 摘要 |
PURPOSE: A soft olefin based resin composition is provided for formability and painting ability at injection molding of bulk products as well as other physical properties such as impact-resistance and heat and high tensile strength by adding specific ethylene-alpha-olefine copolymer rubber, modified resin having polar groups and other favorable additives. CONSTITUTION: The soft olefin based composition comprises as the main components, 25-45 wt.% of ethylene-propylene copolymer containing 7-12 wt.% of the ethylene-propylene rubber; and 33-51 wt.% ethylene-propylene copolymer containing 20-30 wt.% of the ethylene-propylene rubber. The composition further includes 10-22 wt.% of ethylene-alpha-olefine copolymer rubber such as the ethylene-propylene rubber having 25-45 wt.% of propylene and a melt index of 0.5-3g/10min.(230 deg.C.) or the ethylene-octene rubber having 20-30 wt.% of octene and a melt index of 0.5-2g/10min.(230 deg.C.) or mixture thereof; and 1-2 wt.% of modified resin and 0.1-1.5 wt.% of known additives. |
