US4013823A
Expired / Lapsed
US
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Process for preparing elastomeric copolymers of ethylene and higher alpha-olefins
Assignee: Covestro International SA
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Filing: 1975-02-07
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Granted: 1977-03-22
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Expires: 1995-02-07
Abstract
Abstract High yields of elastomeric copolymers of ethylene and higher alpha-olefins, or of ethylene, higher alpha-olefins and unsaturated monomers (polyenes) containing two or more double bonds are obtained by copolymerizing a mixture of the monomers in contact with a catalyst prepared by mixing a catalyst-forming component which is an organometallic compound of aluminum with a supported catalyst-forming component obtained by contacting a halogenated titanium compound with a carrier or support consisting of or comprising an anhydrous Mg or Mn halide partially or completely complexed with a Lewis base capable of forming a complex with it. The copolymers so obtained have valuable mechanical properties, in particular a relatively low value of permanent set and do not exhibit excessive residual deformation at break.
Inventors
- 👤 Paolo Longi
- 👤 Nazzareno Cameli
- 👤 Sandro Parodi
- 👤 Remo Cervi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:00
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/02; C08F4/022; C08F210/00; C08F210/16; Y; Y10; Y10S; Y10S526/00; Y10S526/906; Y10S526/916
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
188 words
A process for preparing saturated, elastomeric and vulcanizable copolymers of ethylene with alpha-olefins having the general formula CH 2 = CHR in which R is an alkyl radical containing from 1 to 6 carbon atoms, or low-unsaturated copolymers of ethylene, said alpha-olefins CH 2 = CHR and polyenes, which process comprises copolymerizing, at a temperature of from -50° C to +150° C, a mixture of said monomers in contact with a catalyst prepared by mixing: a. a catalyst-forming component selected from the group consisting of the hydrides and organometallic compounds of aluminum with b. a catalyst-forming component consisting of the product obtained by cogrinding a halogenated Ti compound with a support comprising, as the essential support constituent, an anhydrous magnesium or manganese dihalide, and with a Lewis base, under conditions such that, in the absence of the base, the support attains a surface area higher than 5 m 2 /g, the total molar ratio between the magnesium or manganese dihalide and the Lewis base in the catalyst being between 2:1 and 5:1, and the amount of Ti in catalyst-forming component (b) being between 0.1% and 30% by weight.
Claim 2
Dependent Claim
188 words
A process for preparing saturated, elastomeric and vulcanizable copolymers of ethylene with alpha-olefins having the general formula CH 2 = CHR in which R is an alkyl radical containing from 1 to 6 carbon atoms, or low-unsaturated copolymers of ethylene, said alpha-olefins CH 2 = CHR and polyenes, which process comprises copolymerizing, at a temperature of from -50° C to +150° C, a mixture of said monomers in contact with a catalyst prepared by mixing: a. a catalyst-forming component selected from the group consisting of the hydrides and organometallic compounds of aluminum with b. a catalyst-forming component consisting of the product obtained by cogrinding a halogenated Ti compound with a support comprising, as the essential support constituent, an anhydrous magnesium or manganese dihalide, and with a Lewis base, under conditions such that, in the absence of the base, the support attains a surface area higher than 5 m 2 /g, the total molar ratio between the magnesium or manganese dihalide and the Lewis base in the catalyst being between 2:1 and 5:1, and the amount of Ti in catalyst-forming component (b) being between 0.1% and 30% by weight.
Claim 3
Dependent Claim
189 words
A process for preparing saturated, elastomeric and vulcanizable copolymers of ethylene with alpha-olefins having the general formula CH 2 = CHR in which R is an alkyl radical containing from 1 to 6 carbon atoms, or low unsaturated copolymers of ethylene, said alpha-olefins, and polyenes, which process comprises copolymerizing at a temperature of -50° C to +150° C, a mixture of said monomers in contact with a catalyst obtained by mixing: a. a catalyst-forming component selected from the group consisting of hydrides and organometallic compounds of aluminum with b. a catalyst-forming component consisting of the product obtained by cogrinding a support the essential support constituent of which is a magnesium or manganese dihalide at least partially complexed with a Lewis base and a halogenated titanium compound, under conditions such that magnesium or manganese dihalide not complexed with the Lewis base attains a surface area higher than 5 m 2 /g, the total molar ratio between the magnesium or manganese dihalide and the Lewis base in the catalyst being between 2:1 and 5:1, and the amount of Ti in the catalyst-forming component (b) being between 0.1% and 30% by weight.
Claim 4
Dependent Claim
189 words
A process for preparing saturated, elastomeric and vulcanizable copolymers of ethylene with alpha-olefins having the general formula CH 2 = CHR in which R is an alkyl radical containing from 1 to 6 carbon atoms, or low unsaturated copolymers of ethylene, said alpha-olefins, and polyenes, which process comprises copolymerizing at a temperature of -50° C to +150° C, a mixture of said monomers in contact with a catalyst obtained by mixing: a. a catalyst-forming component selected from the group consisting of hydrides and organometallic compounds of aluminum with b. a catalyst-forming component consisting of the product obtained by cogrinding a support the essential support constituent of which is a magnesium or manganese dihalide at least partially complexed with a Lewis base and a halogenated titanium compound, under conditions such that magnesium or manganese dihalide not complexed with the Lewis base attains a surface area higher than 5 m 2 /g, the total molar ratio between the magnesium or manganese dihalide and the Lewis base in the catalyst being between 2:1 and 5:1, and the amount of Ti in the catalyst-forming component (b) being between 0.1% and 30% by weight.
Claim 5
Dependent Claim
29 words
The process of claim 2 wherein the Lewis base is an electron-donor compound in which the electron-donor atom (or atoms) is (or are) selected from O, P and N.
Claim 6
Dependent Claim
28 words
The process of claim 2, wherein the catalyst-forming component (a) is selected from the group consisting of aluminum trialkyls and aluminum trialkyls partially complexed with a Lewis base.
References Cited (Backward Citations)
US3642746A
Cited
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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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |