Patent ID: 8058379

Claim:
A 4-methyl-1-pentene polymer comprising: 50 to 100% by mass of a constituting unit derived from 4-methyl-1-pentene and 0 to 50% by mass of a constituting unit derived from at least one of olefins having 2 to 20 carbon atoms excluding 4-methyl-1-pentene provided that the total of the constituting unit derived from 4-methyl-1-pentene and the constituting unit derived from at least one of olefins having 2 to 20 carbon atoms excluding 4-methyl-1-pentene is 100% by mass, wherein the 4-methyl-1-pentene polymer satisfies the following formulas (1) and (2): 48Ã—[ Y]âˆ’ 7500â‰¦ [X]â‰¦ 48Ã—[ Y]âˆ’ 7000â€ƒâ€ƒ(1) 160Â° C.â‰¦[ Y]â‰¦ 190Â° C.â€ƒâ€ƒ(2) in which [X] is a modulus in tension (MPa), as measured in an ASTM D638 method, of the 4-methyl-1-pentene polymer and [Y] is a Vicat softening point (Â° C.), as measured in an ASTM D 1525 method, of the 4-methyl-1-pentene polymer.