Process for preparing olefin polymers
AssigneeSumitomo Chemical Company, Limited
InventorsHideki Sato, Hiroaki Katayama
Life of this patent
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Abstract
A method for producing an olefin polymer, characterized in that an olefin is homopolymerized or copolymerized in the presence of a catalyst for olefin polymerization, having the following (A) and (C) as catalyst components, or a catalyst for olefin polymerization, having the following (A), (B) and (C) as catalyst components: (A) a transition metal complex dissolved, suspended or slurried in an aliphatic hydrocarbon compound; (B) an organoaluminum compound or aluminoxane selected from compounds (B1) to (B3) dissolved, suspended or slurried in an aliphatic hydrocarbon compound; and (C) at least one boron compound selected from compounds (C1) to (C3) suspended or slurried in an aliphatic hydrocarbon compound.
Claims3
A method for producing an olefin polymer, said method comprising:
- (1a) supplying (A) and (C), or (A), (B) and (C) described below as catalyst components in a catalyst preparation apparatus and supplying thus prepared catalyst for olefin polymerization in an olefin polymerization apparatus, or
- (1b) supplying (A) and (C), or (A), (B) and (C) described below as catalyst components in a polymerization apparatus to prepare a catalyst;
- and
- (2) homopolymerizing an olefin or copolymerizing two or more olefins in the presence of the thus prepared catalyst for olefin polymerization:
- (A) is a transition metal compound dissolved, suspended or slurried in an aliphatic hydrocarbon compound;
- (B) is triethylaluminum, triisobutylaluminum, methylaluminoxane or isobutylaluminoxane dissolved, wherein component (B) is suspended or slurried in an aliphatic hydrocarbon compound;
- and
- (C) is a suspension or slurry, wherein said suspension or slurry consists of at least one boron compound selected from the group consisting of:
- (C1) is a boron compound represented by the general formula BQ1Q2Q3;
- (C2) is a boron compound represented by the general formula G+(BQ1Q2Q3Q4);
- and
- (C3) is a boron compound represented by the general formula (L-H)+(BQ1Q2Q3Q4)−,
- wherein,
- B represents a boron atom in the trivalent valence state;
- Q1, Q2, Q3 and Q4 may be the same or different and represent a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a halogenated hydrocarbon group having 1 to 20 carbon atoms, a substituted silyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms or an amino group having 2 to 20 carbon atoms;
- G+ represents an inorganic or organic cation;
- L represents a neutral Lewis base;
- and
- (L-H)+ represents a Bronsted acid,
- wherein component (C) is suspended or slurried in an aliphatic hydrocarbon compound.
A method for producing an olefin polymer, said method comprising:
- (1a) supplying (A) and (C), or (A), (B) and (C) described below as catalyst components in a catalyst preparation apparatus and supplying thus prepared catalyst for olefin polymerization in an olefin polymerization apparatus, or
- (1b) supplying (A) and (C), or (A), (B) and (C) described below as catalyst components in a polymerization apparatus to prepare a catalyst;
- and
- (2) homopolymerizing an olefin or copolymerizing two or more olefins in the presence of the thus prepared catalyst for olefin polymerization:
- (A) is a transition metal compound dissolved, suspended or slurried in an aliphatic hydrocarbon compound;
- (B) is a compound dissolved, suspended or slurried in an aliphatic hydrocarbon, wherein (B) is selected from the group consisting of (B1), (B2) and (B3)
- (B1) is an organoaluminum compound represented by the general formula E1aAlZ3-a;
- (B2) is a cyclic aluminoxane having a structure represented by the general formula (—Al(E2)—O—)b;
- and
- (B3) is a linear aluminoxane having a structure represented by the general formula E3(—Al(E3)—O—)cAlE32,
- wherein
- E1, E2 and E3 respectively represent a hydrocarbon group having 1 to 8 carbon atoms, and all of E1, E2 and E3 may be the same or different;
- Z represents a hydrogen atom or a halogen atom, and all of Z may be the same or different;
- a represents a numeral satisfying 0<a≦3;
- b represents an integer of not less than 2;
- and
- c represents an integer of not less than 1;
- and
- (C) is a suspension or slurry, wherein said suspension or slurry consists of at least N,N-dimethylaniliniumtetrakis(pentafluorophenyl)borate or triphenylmethyltetrakis (pentafluorophenyl)borate, wherein component (C) is suspended or slurried in an aliphatic hydrocarbon compound.
A method for producing an olefin polymer according to any one of claim 1 or 3, wherein a maximum particle diameter of the boron compound in (C) is not more than 50 μm.
Dependencies are inferred from the claim text.