Ethylene polymer compositions

Details Ethylene polymer compositions Ethylene polymer compositions

C - Chemistry, Metallurgy

08

L

400/6586

C08L 23/06 (2006.01) C08L 23/04 (2006.01)

Patent

CA 2026497

Abstract An ethylene polymer composition suitable as gas pipe material. The ethylene polymer composition comprises two or more kinds of ethylene polymers different in average molecular weight, characterized in that: i) the portion not less than 500,000 in weight average molecular weight of said composition: a) has at least one short-chain branch per l,OOO carbon atoms, and b) does not contain a component having a crystalli- zation temperature of not lower than 127°C as measured according to differential scanning calorimetry (DSC) using stepwise isothermal crystallization, and ii) a relative tie:molecules concentration of said composition is not lower than 1.7.

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