Improved sealing properties and optical properties as well as reduced crystalline propylene copolymer composition having a solubility

摘要

A) C₄ - C₈ alpha - olefins are included under 10% super - 14%, propylene copolymer 15 of C₄ - C₈ alpha - olefins - 60%;B) C₄ - C₈ alpha - olefins which 14 - 30% include C₄ - C₈ alpha - olefins, optionally ethylene 0.5 - 3% they are possible to include, desirably propylene copolymer 40 of butene - 85%;(However, total content of C₄ - C₈ alpha - olefins in the propylene polymer composition is higher than 10%)Weight % With it includes, the propylene polymer composition.