Crosslinked resin compositions

A process for preparing a crosslinked resin composition, said process comprising crosslinking a composition consisting essentially of (A) 80-10 wt. % of a propylene polymer and (B) 20-90 wt. % of an ethylene/.alpha.-olefin copolymer prepared by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst, said catalyst comprising a solid component and an organoaluminum compound, said solid component containing at least magnesium and titanium and said ethylene/.alpha.-olefin copolymer having the following properties (i) to (iv):

• ______________________________________ (i) Melt index 0.01-100 g/10 min. (ii) Density 0.870-0.905 g/cm.sup.3 (iii) Maximum peak temperature not lower than 100.degree. C. measured according to a differential scanning calorimetry (DSC) (iv) Insolubles in boiling not less than 10 wt. %. n-hexane ______________________________________