EP4306557A1 - 1-BUTENE/ETHYLENE COPOLYMER, 1-BUTENE-BASED POLYMER COMPOSITION CONTAINING SAID 1-BUTENE/ETHYLENE COPOLYMER AND PROPYLENE-BASED POLYMER, 1-BUTENE-BASED POLYMER COMPOSITION CONTAINING SAID 1-BUTENE/ETHYLENE COPOLYMER, PROPYLENE-BASED POLYMER, AND ETHYLENE-BASED POLYMER, AND USES THEREOF