| abstract |
(57) [Abstract] [Problem] Rigidity, surface hardness, heat resistance, impact strength, transparency, To provide a propylene-based copolymer excellent in heat sealability, blocking resistance, and bleed-out resistance, and a method for producing the same. The propylene copolymer comprises (a) 95 to 99.5 mol% of propylene units and 0.5 (B) the triad tacticity of the propylene unit chain composed of head-to-tail bonds determined by 13 C-NMR is 95.0% or more; (C) the proportion of regio-irregular units based on 2,1-insertion of the propylene monomer in the total propylene insertion determined by 13 C-NMR is 0.05% to 0.5%, and (d) 1 The intrinsic viscosity [η] measured in decalin at 35 ° C. is 0.1 １２12 dl / g. |