Elastomeric copolymers of ethylene with propylene and process for their preparation
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United States of America Patent
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Sep 10, 2002
Issued Date -
N/A
app pub date -
Nov 7, 2000
filing date -
Jun 30, 1993
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Abstract
Amorphous copolymers of ethylene with propylene, and optionally with minor amounts of polyenes, have the following characteristics: (A) the % content by mole of propylene in the copolymer (%P) and the triads ratio EPE/(EPE+PPE+PPP) satisfy the following relationship: 0.01%P+EPE/(E?E+PPE+PPP).gtoreq.1 (B) less than 2% of the CH.sub.2 groups in the chain are in sequences (CH.sub.2).sub.n, wherein n is an even number. These copolymers are obtainable by operating in the presence of particular metallocene catalysts having two fluorenyl groups joined together through a bridging group.
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