High transparency and high flexbility elastoplastic polyolefin compostions

• Main Authors: E. GARAGNANI, G. COLLINA, A. PELLICONI
• Format: Patent
• Language: Chinese; English
• Published: 11.08.2004
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

具有高柔软性和透明性的弹塑性聚烯烃组合物，该组合物包含：A)14～18重量份丙烯的均聚物或丙烯与乙烯和/或一种或多种CH#-[2]＝CHR α-烯烃的共聚物，所述共聚物含有至少95％(重量)丙烯；B)5～18重量份含有乙烯的弹性丙烯共聚物成分，并且在室温下不溶于二甲苯；和C)72～80重量份弹性丙烯共聚物成分，其中所含有的共聚单体选自乙烯以及乙烯和一种或多种CH#-[2]＝CHR α-烯烃的混合物，并且在室温下可溶于二甲苯，所述成分含有15～23％(重量)所述共聚单体；相对于聚烯烃组合物总量，成分B和C共计占82～86％(重量)。本发明组合物的雾度值在30％以下，大部分为15～25％，在某些情况下低至约10％，而弹性模量在150兆帕斯卡以下，大部分在100兆帕斯卡以下。 Highly transparent and flexible elastoplastic polyolefin compositions which contain A) 10-20 parts by weight of a propylene homopolymer or copolymer with ethylene and/or one or more CH2-CHR alpha-olefins, the copolymer containing at least 95% by weight of propylene; B) 5-20 parts by weight of propylene copolymer fraction containing ethylene and insoluble in xylene at room temperature; and C) 60-80 parts by weight of a propylene copolymer fraction containing a comonomer selected from ethylene and mixtures of ethylene with one or more CH2-CHR alpha-olefin and soluble in xylene at room temperature, the fraction containing from 15 to 25% by weight of the comonomer, the percent by weight of the sum of the B and C components with respect to the total polyolefin composition being from 80% to 90%.