Patent ID: 9303112
Filing Date: 2016-04-05
CPC Classification: C08F,C08K,C08L

Claim Text:
1. A propylene resin material comprising a propylene homopolymer portion (I) and a propylene-ethylene copolymer portion (II), wherein the propylene resin material satisfies the following requirements (1), (2), (3), and (4): requirement (1): the copolymer portion (II) comprises constitutional units derived from propylene and constitutional units derived from ethylene, wherein the content of the constitutional units derived from ethylene is 20 to 70% by weight where the overall weight of the copolymer portion (II) is taken as 100% by weight; requirement (2): the value of EPcxis calculated from a formula: EPcxis =(C2′CXIS/C2′CXS) x100 is 100 or more where the content of the constitutional units derived from ethylene contained in the components soluble in xylene at 20° C. of the propylene resin material is represented by C2′CXS, the components soluble in xylene at 20° C. are collectively named CXS, the content of the constitutional units derived from ethylene contained in the components insoluble in xylene at 20° C. of the propylene resin material is represented by C2′CXIS, the components insoluble in xylene at 20° C. are collectively named CXIS; requirement (3): the arithmetic mean (ΔEP) of the polypropylene resin material determined by the following procedures (1) through (5) is 20% or less; (1) the contents of five types of triads PPE (2) the ratios, PPE (3) the ratios, PPE (4) using PPE the absolute value (ΔPPE the absolute value (ΔEPE the absolute value (ΔPEP the absolute value (ΔPEE the absolute value (ΔEEE (5) using ΔPPE where P denotes a constitutional unit derived from propylene, E denotes a constitutional unit derived from ethylene, PPE denotes a triad composed of a constitutional unit derived from propylene, another constitutional unit derived from propylene, and a constitutional unit derived from ethylene, EPE denotes a triad sequentially composed of a constitutional unit derived from ethylene, a constitutional unit derived from propylene, and another constitutional unit derived from ethylene, PEP denotes a triad sequentially composed of a constitutional unit derived from propylene, a constitutional unit derived from ethylene, and another constitutional unit derived from propylene, PEE denotes a triad sequentially composed of a constitutional unit derived from propylene, a constitutional unit derived from ethylene, and another constitutional unit derived from ethylene, EEE denotes a triad sequentially composed of a constitutional unit derived from ethylene, another constitutional unit derived from ethylene, and still another constitutional unit derived from ethylene, requirement (4): the amount of the components insoluble in boiling xylene of the propylene resin material is 4% by weight or less, where the overall weight of the propylene resin material is taken as 100% by weight; and wherein the material is prepared by a process comprising heating a mixture of an organic peroxide with a propylene polymeric material produced via a multistage polymerization process using a polymerization catalyst and comprising a propylene homopolymer portion and a propylene-ethylene copolymer portion, and heating the mixture at a temperature lower than a decomposition temperature of the organic peroxide at which the half-life of the organic peroxide is one minute.