Highly processable polymeric compositions based on lldpe

Details Highly processable polymeric compositions based on lldpe Highly processable polymeric compositions based on lldpe

C - Chemistry, Metallurgy

08

L

C08L 23/04 (2006.01) B32B 27/32 (2006.01) C08F 297/08 (2006.01) C08J 5/18 (2006.01) C08L 23/08 (2006.01)

Patent

CA 2158729

Polymeric compositions based on Linear Low Density Polyethylene (LLDPE) comprising: (A) from 75 to 95 % by weight of an ethylene copolymer with an .alpha.-olefin CH2=CHR, wherein R is an alkyl radical having from 1 to 10 carbon atoms, and (B) from 5 to 25 % by weight of a copolymer of propylene with ethylene and an .alpha.-olefin CH2=CHRI, wherein RI is an alkyl radical having from 2 to 10 carbon atoms. Copolymer (B) is characterised by a relatively high insolubility in xylene. The polymeric compositions of the invention are endowed with improved processability and improved mechanical properties with respect to the LLDPE of the conventional type.

Compositions polymères à base de polyéthylène linéaire de faible densité comportant (A) de 75 à 95 % en poids d'un copolymère d'éthylène et d'une alpha-oléfine CH¿2?=CHR, où R représente un radical alkyle C¿2-10?, et (B) de 5 à 25 % en poids d'un copolymère de propylène et d'éthylène, et d'une alpha-oléfine CH¿2?=CHR?I¿, où R?I¿ représente un radical alkyle C¿2-10?. Le copolymère (B) est caractérisé en ce qu'il est relativement difficilement soluble dans le xylène. Lesdites compositions polymères sont dotées d'une transformabilité améliorée et de propriétés mécaniques améliorées par rapport au polyéthylène linéaire de faible densité de type traditionnel.

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