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|1. (WO2017150265) 4-METHYL-1-PENTENE POLYMER, RESIN COMPOSITION, AND MOLDED OBJECT|
|Applicants:||MITSUI CHEMICALS, INC.
|Title:||4-METHYL-1-PENTENE POLYMER, RESIN COMPOSITION, AND MOLDED OBJECT|
The present invention addresses the problem of providing a 4-methyl-1-pentene polymer that has high heat resistance and gives molded objects which are inhibited from opacifying upon steam sterilization and of providing a 4-methyl-1-pentene polymer that has high heat resistance and gives films which have improved elongation. The polymers of the present invention are each a 4-methyl-1-pentene polymer in which the content of constituent units derived from 4-methyl-1-pentene is 90-100 mol% and the content of constituent units derived from at least one olefin selected from among ethylene and C3-20 α-olefins excluding 4-methyl-1-pentene is 0-10 mol%. The 4-methyl-1-pentene polymer satisfies the following requirements (a) to (e): (a) to have a mesodiad content (m), as determined by 13C-NMR, of 98-100%; (b) to have a ratio of the z-average molecular weight Mz to the weight-average molecular weight Mw, Mz/Mw, as determined by gel permeation chromatography (GPC), of 2.5-20; (c) to have a ratio of the weight-average molecular weight Mw to the number-average molecular weight Mn, Mw/Mn, as determined by gel permeation chromatography (GPC), of 3.6-30; (d) to have a melt flow rate (MFR), as determined under the conditions of 260ºC and a load of 5 kg in accordance with ASTM D1238, of 0.1-500 g/10 min; and (e) to have a 23ºC-decane soluble content of 5.0 mass% or less.