EP0632066A1
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EP
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Elastomeric copolymers of ethylene with propylene and process for their preparation
Assignee: Basell Technology Co BV
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Filing: 1994-05-04
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Granted: —
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Expires: 2014-05-04
Abstract
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/(EPE+PPE+PPP) ≧ 1 (B) less than 2% of the CH₂ groups in the chain are in sequences (CH₂) 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.
Inventors
- 👤 Maurizio Galimberti
- 👤 Luigi Resconi
- 👤 Enrico Albizzati
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 02:57
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65908; C08F4/65912; C08F4/6592; C08F4/65922; C08F4/65927; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
A copolymer of ethylene with propylene, having a content of ethylene derived units comprised between about 35 and 85% by mole, a content of propylene derived units comprised between about 10 and 60% by mole, and having the following characteristics: (A) the % by mole content of propylene in the copolymer (%P) and the ratio EPE/(EPE+PPE+PPP), wherein EPE, PPE and PPP represent the sequences ethylene/propylene/ethylene, propylene/propylene/ethylene and propylene/propylene/propylene respectively in the copolymer, satisfy the following relationship: 0.01%P + EPE/(EPE+PPE+PPP) ≧ 1 (B) less than 2% of the CH₂ groups in the polymeric chain are in sequences (CH₂) n , wherein n is an even number.
Claim 2
Dependent Claim
26 words
A copolymer according to claim 1, having a content of units deriving from at least one polyene comprised between about 0 e 5 % by mole.
Claim 3
Dependent Claim
36 words
A copolymer according to one of claims 1 or 2, in which the product of the reactivity ratios r₁·r₂, wherein r₁ is the reactivity ratio of propylene and r₂ that of ethylene, is lower than 0,1.
Claim 4
Dependent Claim
17 words
A copolymer according to one of claims 1 to 3, having an intrinsic viscosity (η) > 1,0.
Claim 5
Dependent Claim
20 words
A copolymer according to one of claims 1 to 4, having a ratio M w /M n lower than 3.
Claim 6
Dependent Claim
20 words
An elastomeric copolymer obtainable by subjecting the copolymer according to one of claims 1 to 5 to a vulcanisation process.
Claim 7
Dependent Claim
12 words
A shaped article obtained from an elastomeric copolymer according to claim 6.
Claim 8
Dependent Claim
254 words
A process for the preparation of a copolymer according to one of claims 1 to 5, comprising the polymerisation reaction of mixtures of ethylene, propylene and optionally one or more polyenes, in the presence of a catalytic amount of a catalyst comprising the product of reaction between: (A) a compound of formula (I) wherein substituents R¹, the same or different from each other, are hydrogen atoms, C₁-C₂₀ alkyl radicals, C₃-C₂₀ cycloalkyl radicals, C₂-C₂₀ alkenyl radicals, C₆-C₂₀ aryl radicals, C₇-C₂₀ alkylaryl radicals, or C₇-C₂₀ arylalkyl radicals, optionally two adjacent substituents R¹ can form a cycle comprising from 5 to 8 carbon atoms and, furthermore, substituents R¹ can contain Si or Ge atoms; M is Ti, Zr or Hf; substituents R², the same or different from each other, are halogen atoms, -OH, -SH, R¹, -OR¹, -SR¹, - NR¹₂ or PR¹₂, wherein R¹ is defined as above; the group R³ is selected from >CR¹₂, >SiR¹₂, >GeR¹₂, >NR¹ or >PR¹, wherein R¹ is defined as above and optionally, when R³ is >CR¹₂, >SiR¹₂ or >GeR¹₂, both substituents R¹ can form a cycle comprising from 3 to 8 atoms, optionally as reaction product with an aluminium organo-metallic compound of formula AlR⁴₃ or Al₂R⁴₆, wherein substituents R⁴, the same or different from each other, are R¹ or halogen, and (B) an alumoxane, optionally mixed with an aluminium organo-metallic compound of formula AlR⁴₃ or Al₂R⁴₆, wherein substituents R⁴, the same or different from each other, are defined as above, or one or more compounds able to give a metallocene alkyl cation.
Claim 9
Dependent Claim
37 words
A process according to claim 8, in which the catalyst comprises the product of reaction between: (A) dimethylsilandiyl-bis(fluorenyl)zirconium dichloride, and (B) a compound selected from tetraisobutyl-dialuminoxane (TIBAO) and the reaction product between triisobutyl aluminium (TIBAL) and water.
References Cited (Backward Citations)
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