US4305840A
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US
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Catalyst-forming components and catalysts prepared therefrom useful in the polymerization of olefins
Assignee: Montedison SpA
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Filing: 1979-10-25
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Granted: 1981-12-15
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Expires: 1999-10-25
Abstract
Abstract There are disclosed new catalyst-forming components and catalysts prepared therefrom which, used in the polymerization of olefins, result in high yields of polyolefins having a narrow molecular weight distribution and which do not require special purifying after-treatments for the removal of catalyst residues. More particularly, the new catalyst components and catalysts prepared from them are useful in the polymerization of ethylene or alpha-olefins CH2=CHR, in which R is an alkyl or aryl radical of from 1 to 8 carbon atoms, or mixtures of ethylene with said alpha-olefins.
Inventors
- 👤 Umberto Zucchini
- 👤 Gianni Pennini
- 👤 Illaro Cuffiani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:47
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/02; C08F4/022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
203 words
Components of catalysts for the polymerization of olefins obtained by reacting in an apolar solvent: (a) a preformed product of the reaction between: (a.1) a compound of trivalent Ti or V of the formula MeR n X 3-n , wherein Me is Ti or V, R is a group OR', NR' 2 or OCOR' in which R' is alkyl, cycloalkyl or aryl with from 1 to 12 carbon atoms, X is halogen, and 0≦n≦3; (a.2) an organic compound containing at least one OH group selected from the group consisting of aliphatic, cycloaliphatic and aromatic alcohols with from 1 to 18 carbon atoms, phenols with from 6 to 18 carbon atoms, and silanols R' p Si(OH) 4-p wherein R' has the same meaning as in (a.1) and 1≦p≦3; and (a.3) a Mg compound selected from Mg oxide, Mg hydroxide, Mg salts of oxygenated inorganic acids and compounds R q MgX 2-q , wherein R is a group OR', OH or OCOR', in which R' has the same meaning as in (a.1), X is halogen and 0≦q≦2; with (b) a compound selected from the group consisting of Al trialkyls, Al alkyl halides, halogen-silanes, Si, Al, Sn and B halides, hydrogen halides and TiCl 4 .
Claim 2
Dependent Claim
203 words
Components of catalysts for the polymerization of olefins obtained by reacting in an apolar solvent: (a) a preformed product of the reaction between: (a.1) a compound of trivalent Ti or V of the formula MeR n X 3-n , wherein Me is Ti or V, R is a group OR', NR' 2 or OCOR' in which R' is alkyl, cycloalkyl or aryl with from 1 to 12 carbon atoms, X is halogen, and 0≦n≦3; (a.2) an organic compound containing at least one OH group selected from the group consisting of aliphatic, cycloaliphatic and aromatic alcohols with from 1 to 18 carbon atoms, phenols with from 6 to 18 carbon atoms, and silanols R' p Si(OH) 4-p wherein R' has the same meaning as in (a.1) and 1≦p≦3; and (a.3) a Mg compound selected from Mg oxide, Mg hydroxide, Mg salts of oxygenated inorganic acids and compounds R q MgX 2-q , wherein R is a group OR', OH or OCOR', in which R' has the same meaning as in (a.1), X is halogen and 0≦q≦2; with (b) a compound selected from the group consisting of Al trialkyls, Al alkyl halides, halogen-silanes, Si, Al, Sn and B halides, hydrogen halides and TiCl 4 .
Claim 3
Dependent Claim
108 words
Catalyst components according to claim 1 consisting of the product obtained by reacting: (a) the product of the reaction between TiCl 3 , a hydroxyl compound selected from the group consisting of aliphatic alcohols with from 2 to 8 carbon atoms and phenol, and MgCl 2 ; with (b) a compound selected from the group consisting of SiCl 4 , Cl 3 SiCH 3 , ClSi(CH 3 ) 3 , Cl 3 SiH, TiCl 4 , AlCl 3 , Al(C 2 H 5 ) 2 Cl, Al(C 2 H 5 )Cl 2 , Al(C 2 H 5 ) 3 , SnCl 4 , BCl 3 and hydrogen halides.
Claim 4
Dependent Claim
55 words
Catalysts for the polymerization of ethylene or mixtures thereof with minor amounts of alpha-olefins CH 2 ═CHR, wherein R is an alkyl with from 1 to 8 carbon atoms; obtained by reaction of a catalyst component according to claim 1 with an organometallic aluminum compound selected from the group consisting of Al-trialkyls and Al-alkyl halides.
Claim 5
Dependent Claim
31 words
Catalyst components according to claim 1, containing in a chemically combined form an electron-donor compound in an amount comprised between 0.2 and 3 moles per g. atom of Ti or V.
Claim 6
Dependent Claim
48 words
A catalyst for the polymerization of alpha-olefins CH 2 ═CHR, wherein R is an alkyl or aryl radical with from 1 to 8 carbon atoms, or mixtures thereof with minor proportions of ethylene, obtained by mixing a catalyst component as defined in claim 4 with an Al-alkyl compound.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |