Polyethylene composition

Details Polyethylene composition Polyethylene composition

C - Chemistry, Metallurgy

08

L

400/4919

C08L 23/06 (2006.01)

Patent

CA 1218181

Abstract of the Disclosure A polyethylene composition comprising three specific types of polyethylenes; polyethylene (A), polyethylene (B) and polyethylene (C) respectively. The polyethylene composition has a melt index not less than 0.001 g/10 min. and not more than 10 g/cm and exhibits excellent processability under variant molding techniques. Molded objects exhibit excellent physical properties such as impact strength environmental stress cracking resistance and uniform thickness distribution. Polyethylene (A) has a molecular weight of from 5,000 to 90,000 and polyethylene (C) has a molecular weight of from 100,000 to 1,500,000 and the ratio of the molec- ular weight of polyethylene (C)/ the molecular weight of polyethylene (A) is from 4 to 200. Polyethylene (B) has a molecular weight of from 50,000 to 500,000, being pre- pared by a polymerization with use of a chromium compound- supported type catalyst capable of producing a specifically conditioned homopolyethylene with respect to the proper- ties of the polymers in terms of flow ratio and die swell.

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