Polyethylene composition and process for producing the same

Details Polyethylene composition and process for producing the same Polyethylene composition and process for producing the same

C - Chemistry, Metallurgy

08

F

400/4919

C08F 110/02 (2006.01) C08L 23/04 (2006.01)

Patent

CA 1138148

ABSTRACT OF THE DISCLOSURE A polyethylene composition comprising a mixture of three kinds of polyethylenes (A), (B) and (C) characterized in that: (i) the viscosity average molecular weight of (A) is 1,000-100,000, the viscosity average molecular weight of (B) is 100,000-1,000,000, the viscosity average molecular weight of (C) is 400,000-6,000,000, the molecular weight ratio of (B) to (A), i.e. B/A, is 2-200 and the molecular weight ratio of (C) to (B), i.e. C/B, is 1.5 or more. (ii) the mixing ratio of (A) to (B) is 30/70 to 70/30 and the mixing ratio of (C) is 1-10% by weight based on the total composition, and (iii) the melt index of the composition is 0.001-1, and a process for producing said composition. This polyethylene composition is excellent in physical properties in that it has an appropriate die swell, a high melt tension and an excellent moldability and exhibits a high stiffness and a high ESCR.

358085

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