Patent ID: 6794476
Filing Date: 2004-09-21
Classification: C08F,C08L

Abstract:
A propylene homopolymer characterized by that:(a) a melt tension (MT) measured at a temperature of 230Â° C., a Z average molecular weight (Mz) determined by gel permeation chromatography and a melt index (MI) (g/10 minutes) measured at a temperature of 230Â° C. and a load of 21.2N satisfy the relation of an equation (1): log MT&gE;0.555Ã—log[Mz/MI]âˆ’2.85â€ƒâ€ƒ(1) and (b) a difference [T60âˆ’T40] in eluting temperatures and a maximum eluting temperature Tmax(Â°C) in programmed temperature fractional chromatography satisfy both of: log[T60âˆ’T40]&lE;âˆ’0.232Tmax+25.70â€ƒâ€ƒ(2) T60âˆ’T40&lE;80â€ƒâ€ƒ(3) in a range where Tmax is 110Â° C. or lower, wherein T60 represents a temperature (Â°C) at which 60% by weight of the components is eluted, and T40 represents a temperature (Â°C) at which 40% by weight of the components is eluted, or satisfy the relation of: T60âˆ’T40&lE;1.51â€ƒâ€ƒ(4) in a range where Tmax exceeds 110Â° C. and is 130Â° C. or lower.