Very low density polyethylene and high density polyethylene...

Details Very low density polyethylene and high density polyethylene... Very low density polyethylene and high density polyethylene...

C - Chemistry, Metallurgy

08

L

C08L 23/16 (2006.01) B32B 27/32 (2006.01) C08F 210/16 (2006.01) C08J 5/18 (2006.01) C08L 23/04 (2006.01) C08L 23/06 (2006.01) C08L 23/08 (2006.01) C09D 123/08 (2006.01)

Patent

CA 2414056

Blends of very low density polyethylene produced using metallocene catalysts (mVLDPE) and high density polyethylene (HDPE) are disclosed. The polymer blends include a metallocene-catalyzed VLDPE polymer having a density of less than 0.916 g/cm3, the VLDPE polymer preferably being linear and without long chain branching, and a HDPE polymer having a density of greater than 0.940 g/cm3. The polymer blends are particularly suitable in blown and cast film applications.

La présente invention concerne des mélanges de polyéthylène très basse densité de catalyse métallocénique (mVLDPE) et de polyéthylène haute densité (HDPE). Ces mélanges de polymères incluent un polymère de VLDPE de catalyse métallocénique d'une densité n'excédant pas 0,916 g/cm?3¿, le polymère VLDPE étant de préférence linéaire et sans ramification de chaîne longue, et un polymère HDPE d'une densité supérieure à 0,940 g/cm?3¿. Ces mélanges de polymères conviennent particulièrement pour les applications de films soufflés et coulés.

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