EP0145368A2
Expired / Lapsed
EP
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Process for producing propylene block copolymers
Assignee: Tonen General Sekiyu KK
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Filing: 1984-11-21
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Granted: —
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Expires: 2004-11-21
Abstract
Abstract A process for producing block copolymers which comprises the steps of (a) polymerizing propylene in the presence of a catalyst to give a crystalline propylene polymer, and (b) copolymerizing ethylene and at least one kind of alpha-olefin in the presence of said catalyst and said polymer, said catalyst comprising (A) a catalyst component obtained by contacting with one another 1) a magnesium alkoxide, 2) a silicon compound having the hydrogen-silicon bond, 3) an electron donor compound, and 4) a titanium compound (B) an organic compound of a metal in Group I to III of the Periodic Table, and (C) an organosilicon compound represented by the formula RpSiXm(OR min )n, wherein R and R min are the same or different C1-20 hydrocarbon groups, X is a halogen atom, 0 </= p < 4, 0 </= m < 4, 0 < n </= 4, and p + m + n = 4.
Inventors
- 👤 Masahito Fujita
- 👤 Masami Kizaki
- 👤 Yukio Nagashima
- 👤 Makoto Miyazaki
- 👤 Yuichi Shinbori
- 👤 Naomi Inaba
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 21:23
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
156 words
A process for producing propylene block copolymers which comprises the steps of: (a) polymerizing propylene in the presence of a catalyst to give a crystalline propylene polymer, (b) copolymerizing ethylene and at least one alpha-olefin in the presence of said catalyst and said crystalline polypropylene polymer, said catalyst comprising (A) a titanium-containing catalyst component obtained by contacting with one another (a) a magnesium alkoxide, (b) a silane having at least one hydrogen-silicon bond, and (c) an electron donor compound, and (d) a titanium compound, (8) an organic compound of a metal of Groups I and III of the Periodic.Table, and (C) an organo silicon compound represented by the formula R p SiX m (OR') n wherein R and R' are the same or different C 1-20 hydrocarbon groups, X is a halogen atom, 0 < p < 4, 0 ≤ m < 4, 0 < n ≤ 4, and p + m + n = 4.
Claim 2
Dependent Claim
156 words
A process for producing propylene block copolymers which comprises the steps of: (a) polymerizing propylene in the presence of a catalyst to give a crystalline propylene polymer, (b) copolymerizing ethylene and at least one alpha-olefin in the presence of said catalyst and said crystalline polypropylene polymer, said catalyst comprising (A) a titanium-containing catalyst component obtained by contacting with one another (a) a magnesium alkoxide, (b) a silane having at least one hydrogen-silicon bond, and (c) an electron donor compound, and (d) a titanium compound, (8) an organic compound of a metal of Groups I and III of the Periodic.Table, and (C) an organo silicon compound represented by the formula R p SiX m (OR') n wherein R and R' are the same or different C 1-20 hydrocarbon groups, X is a halogen atom, 0 < p < 4, 0 ≤ m < 4, 0 < n ≤ 4, and p + m + n = 4.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein the magnesium alkoxide and the silicon compound having the hydrogen-silicon bond are reacted together prior to contact with the electron donor and the titanium compound.
Claim 4
Dependent Claim
22 words
The process of claim 2 wherein the silicon compound having the hydrogen-silicon bond is trichlorosilane and the magnesium compound is magnesium diethoxide.
Claim 5
Dependent Claim
59 words
The process of any of claims 1 to 3, wherein the organic compound is an organoaluminum compound represented by the formula R 10 AlX'' ' 3-w wherein R 10 is an alkyl or aryl group, X''' is a halogen atom, alkoxyl group, or hydrogen atom and w is any nunber in the range of 1 < w < 3.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein the organoaluminum compound is an aluminum trialkyl.
Claim 7
Dependent Claim
17 words
The process of claim 5 wherein the aluminum trialkyl is one of triethyl aluminum or triisobutyl aluminum.
Claim 8
Dependent Claim
36 words
The process of claim 1 wherein the organo silicon compound is selected from ethyl triethoxy silane, vinyl triethoxy silane, phenyl trimethoxy silane, phenyl triethoxy silane, diphenyl dimethoxy silane, methyl phenyl dimethoxy silane and chlorophenyl diethoxy silane.
Claim 9
Dependent Claim
53 words
The process of claim 1 wherein the electron donor is selected from carboxylic acids, carboxylic acid anhydrides, carboxylate esters, carboxylic acid halides, alcohols, ethers, ketones, amines, amides, nitriles, aldehydes, alcoholates, phosphoamides, thioethers, thioesters, carbonate esters and compounds of phosphorus, arsenic or antimony attached to an organic group through a carbon or oxygen atom.
Claim 10
Dependent Claim
12 words
The process of claim 8 wherein the electron donor is ethyl benzoate.
Claim 11
Dependent Claim
12 words
The process of claim 3 wherein the titanium compound is TiCl 4.
References Cited (Backward Citations)
No citation records indexed.
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