Elastomeric copolymers of ethylene with alpha-olefins and...

Details Elastomeric copolymers of ethylene with alpha-olefins and... Elastomeric copolymers of ethylene with alpha-olefins and...

C - Chemistry, Metallurgy

08

F

C08F 210/16 (2006.01) C08F 4/642 (2006.01)

Patent

CA 2123335

ABSTRACT OF THE DISCLOSURE Amorphous copolymers of ethylene with .alpha.-olefins and optionally minor amounts of polyenes are disclosed, having the following characteristics: (A) the % by mole content of .alpha.-olefin in the copolymer (%.alpha.) and the ratio between the molar amount of .alpha.-olefin diads and the molar content of .alpha.-olefin in the copolymer (.alpha..alpha./.alpha.) satisfy the following relationship: (%.alpha.) - 250 (.alpha..alpha./.alpha.) ? 10 (B) less than 2% of the CH2 groups in the polymeric chain are in sequences (CH2)n, wherein n is an even number. These copolymers are obtainable by operating in the pres- ence of particular metallocene-based catalysts having two fluorenyl groups joined together through a bridging group.

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