TH33019A - Catalyst for olifin polymerization And methods for their preparation - Google Patents

Abstract

DC60 (22/01/42) A catalyst for the polymerization of olefins is revealed, which contains product substances that can be obtained by contact: (A) a crosslinked and/or substituted cyclopentadienyl compound of Ti, Zr or Hf; (B) one organometallic aluminum compound of formula (II) or more AIR43-zHz (II) in which the R4 substituents are identical or different, linear or branched alkyl or alkylaryl radicals C1-C20, selectively saturated or unsaturated, containing Si or Ge atoms, in which at least one of the R4 substituents is different from the linear alkyl group z is 0 or 1; and (C) water. The molar ratio between the organometallic aluminum compound and water shall be composed between 1:1 and 100:1. Such catalyst It can be obtained by a process consisting of the following steps: (i) contact of component (A) with a portion of component (B) in the absence of component (C); (ii) contact of a portion of component (B) with component (C) in the absence of component (A) and continuously; (iii) contact of the product obtained in steps (i) and (ii); and the catalyst for olefin polymerization is exposed, which contains the product which can be obtained by contact: (A) a crosslinked and/or substituted cyclopentadienyl compound of Ti, Zr, or Hf; (B) one or more organometallic aluminum compounds of formula (II) (chemical formula) in which the R4 substituents are identical or different, linear or branched, saturated or unsaturated C1-C20 alkyl or alkylaryl radicals. Selectively, an organometallic compound containing either Si or Ge atoms, where at least one of the R4 substituents is distinct from the linear alkyl group z is 0 or 1, and (C) water, the molar ratio between the organometallic compound, aluminum, and water is composed between 1:1 and 100:1. Such catalysts can be obtained by compounding in the following steps: (i) contact of component (A) with component (B) in the absence of component (C); (ii) contact of component (B) with component (C) in the absence of component (A), and continuously; and (iii) contact of the product obtained in steps (i) and (ii).

Claims (19)

1. A catalyst for the polymerization of olefins, containing a product substance that can be obtained by contact with the following components: (chemical formula) 2. Catalyst pursuant to claim 1 where such component (B) conforms to formula (III) (chemical formula). 3. Catalyst pursuant to claim paragraph 2 where the aforementioned component (B) is tris(2,4,4-trimethyl-pentyl)aluminum. 4. Catalist pursuant to claim 1 where component (B) conforms to formula (IV) (chemical formula). 5. Catalyst pursuant to claim paragraph 4 where such component (B) is tris(2,3,3-trimethyl-pentyl)aluminum or tris(2,3,-dimethyl-pentyl)aluminum. 6. Catalyst according to any of the claims 1 through 5 in which component (B) is a mixture of two organometallic aluminum compounds of formula (II) in which z = 0 and z = 1 such that the molar ratio between the hydrogen atom directly bonded to the aluminum and the aluminum atom is less than 0.8. 7. Catalyst pursuant to claim 6, whereby the said molar ratio between hydrogen atoms directly bonded to aluminum and aluminum atoms ranges from 0.02 to 0.3. 8. Catalyst according to any of the claims 1 through 7 where the molar ratio between the said organometallic aluminum compound and the said water is 2. 9. Catalyst according to any of the claims 1 through 8 where the molar ratio between compound (B) and metal M of component (A) shall be between 50 and 50,000. 10. Catalyst under any of the claims 1 through 9 in which the aforementioned cyclopentadienyl compound of formula (I)M is zirconium. 11. Catalysts under any of the claims 1 through 10 shall be selected in which cyclopentadienyl compounds of the formula (I); m = 0 and C,R1 1-m H5-2 and C5R1y-m H5-y shall be selected from groups consisting of tetramethyl-cyclopentadienyl, pentamethyl-cyclopentadienyl, indenyl and 4, 5, 6, 7-tetrahydroindenyl. 12. Categorize according to any of the following. Of claims 1 to 10, the cyclopentadienyl compounds of the formula (I); m = 1 and C5R1x-m H5-x and 5R1y-m H5-y are selected from groups consisting of tetramethyl-cyclopentadienyl, indenyl, 2-methyl-indenyl, 4,7-dimethyl-indenyl, 2,4,7-trimethyl-indenyl, 4,5,6,7-tetrahydroindenyl, 2-methyl-4,5,6,7-tetrahydroindenyl, 4,7-dimethyl-4,5,6,7-tetrahydroindenyl, 2-methyl-4,5,6,7-tetrahydroindenyl. Hydroindenyl, 4,7-tetrahydroindenyl, 2,4,7-trimethyl-4,5,6,7-tetrahydroindenyl and fluorenyl, and R2 is (CH3)2Si less than or -CH2CH2-. 13. Catalyst pursuant to any of the claims 1 through 12 in which the cyclopentadienyl compound of formula (I) has a substituent Q that is a chlorine atom or a methyl group. 14. A selectable process for homopolymerization or copolymerization of (formula)-olefins in the presence of polyenes and/or cycloolefins, characterized by being performed in the presence of a catalyst, as described in any of Claims 1 through 13. 15. The procedure under claim 14 where (formula)-olefin is ethylene and component (B) is a mixture of two organometallic aluminum compounds of formula (II) where z - 0 and z = 1 in such quantities that the molar ratio between the hydrogen atoms directly bonded to the aluminum and the aluminum atoms is in the range from 0.02 to 0.3. 16. The procedure under claim 15 where, in step (i), the molar ratio between the hydrogen atom directly bonded to the aluminum atom and the aluminum atom is greater than 0.02 in step (i) and less than 0.2 in step (ii). 17. The procedure under claim 14 in which (formula)-olefin is propylene and component (B) is a mixture of two organometallic aluminum compounds of formula (II) in which z - 0 and z = 1 in such quantities that the molar ratio between the hydrogen atoms directly bonded to the aluminum and the aluminum atoms is in the range from 0.02 to 0.3. 18. The procedure under claim 18 in which the molar ratio between the hydrogen atom directly bonded to the aluminum and the aluminum atom is higher than 0.02 in step (i) and lower than 0.4 in step (ii). 19. The procedure for preparing the catalyst for the polymerization of olefins, as described in any of Claims 1–13, consists of the following steps: (i) contact of component (A) with component (B) in the absence of component (C), where components (A), (B), and (C) have the meanings reported in Claims 1; (ii) contact of component (B) with component (C) in the absence of component (A), and continuously; (iii) contact of the product obtained in steps (i) and (ii), where components (B) used in steps (i) and (ii) may be the same or different from each other. (Claims 19, page 5, figure 0)