PURPOSE: The titled composition which has excellent flexibility, low-temperature impact resistance, mechanical strength, and moldability and gives a molded article with excellent appearance, consisting of a specified hydrogenated derivative of a block copolymer, a PP resin, and a non-aromatic rubber-softener.
CONSTITUTION: A block copolymer of the formula (where A is a monovinyl-substituted aromatic hydrocarbon polymer block; B is an elastomeric conjugated- diene polymer block; n is 1W5) obtained by the block polymerization of a monovinyl-substituted aromatic hydrocarbon and a conjugated diene monomer in an inert solvent in the presence of an Li catalyst or a Ziegler catalyst is hydrogenated in an inert solvent in the presence of a hydrogenation catalyst to give a hydrogenated derivative (a) of the aforementioned block copolymer having an MFR (230°C, 5kg load) of 0.5W20g/10min. Then 100pts.wt. component (a), 30W 300pts.wt. PP resin (b) with an MFR (230°C, 2.16kg load) of 1g/10min or higher, and 0W50pts.wt. non-aromatic rubber-softener (e.g. a non-aromatic mineral oil) are compounded.
NISHITANI YOSHINORI
ITO SHOJI
| JPS58215446A | 1983-12-14 | |||
| JPS58206644A | 1983-12-01 | |||
| JPS596236A | 1984-01-13 |
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