Catalyst for producing polyolefins

Abstract

Novel highly active catalysts useful for highly stereospecific polymerization of olefin which enables to produce polymer of good grain size having a high stereoregularity can be obtained by a combination of [A] a solid catalyst component obtained by reacting a specified organomagnesium component (i) with a specified chlorosilane compound containing Si--H (ii) to obtain a solid (1) and reacting said solid (1) with a titanium compound containing at least one halogen atom (2) and a carboxylic acid or a derivative thereof (3) and [B] a component consisting of an organometallic compound and a carboxylic acid or a derivative thereof.The organomagnesium component is of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.swherein .alpha. is a number of 0 or greater than 0; .beta.> 0; p, q, r and s are each a number of 0 or greater; p+q+r+s=m.alpha.+2.beta. wherein m is the valency of M; M is a metal element of the 1st to the 3rd group of the Periodical Table; R.sup.1 and R.sup.2 are the same or different hydrocarbon radicals having 1 to 20 carbon atoms; X and Y are the same or different radicals selected from the group consisting of halogen, OR.sub.3, OSiR.sup.4 R.sup.5 R.sup.6, NR.sup.7 R.sup.8 and SR.sup.9 wherein R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are each hydrogen atom or a hydrocarbon radical having 1 to 20 carbon atoms and R.sup.9 is a hydrocarbon radical having 1 to 20 carbon atoms,And chlorosilane is of the formulaH.sub.a SiCl.sub.b R.sub.4-(a+b)wherein a and b are each a number greater than 0, having the relationship a.ltoreq.2 and a+b.ltoreq.4 wherein R is a hydrocarbon radical having 1 to 20 carbon atoms.

Description

Claims

1. In a catalyst useful for polymerizing olefins comprising a magnesium compound, a titanium compound, an electron donor, and an organometallic compound, the improvement which is characterized in that a solid (1) is obtained by reacting one mole of organomagnesium component (i) represented by the general formula

M.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.s

wherein

.alpha. is a number of 0 or greater than 0;

.beta. > 0;

p, q, r and s are each numbers 0 or greater than 0, respectively, having the relationship of p+q+r+s=m.alpha.+2.beta.;

M is a metal component of the 1st to the 3rd group of the Periodic Table;

m is the valency of M;

R.sup.1 and R.sup.2 are the same or different hydrocarbon groups having 1-20 carbon atoms;

X and Y are the same or different groups selected from the group consisting of halogen, OR.sup.3, OSiR.sup.4 R.sup.5 R.sup.6, NR.sup.7 R.sup.8 and SR.sup.9,

wherein

R.sup.3, r.sup.4, r.sup.5, r.sup.6, r.sup.7 and R.sup.8 are hydrogen atoms or hydrocarbon groups having 1-20 carbon atoms, and

R.sup.9 is a hydrocarbon group having 1-20 carbon atoms, with 0.01-100 moles of chlorosilane compound (ii) containing Si--H bonds and represented by the general formula

H.sub.a SiCl.sub.b R.sub.4-(a+b)

wherein

< a.ltoreq.2,

b is a number greater than 0,

a+b.ltoreq.4, and

R is a hydrocarbon group having 1-20 carbon atoms, that a solid catalyst component (A) is obtained by reacting said solid (1), a titanium compound (2) selected from a tetravalent titanium halide and/or a trivalent titanium halide, and a carboxylic acid or a derivative thereof (3) selected from a carboxylic acid having up to 30 carbon atoms, an acid halide having up to 30 carbon atoms, an acid anhydride or a carboxylic acid ester having up to 30 carbon atoms in the carboxylic portion, and that said catalyst component (A) is used with a component (B) comprising an organometallic compound of a metal selected from Groups I, II, III of the Periodic Table mixed with a carboxylic acid or derivative thereof selected from a carboxylic acid having up to 30 carbon atoms, an acid halide having up to 30 carbon atoms, an acid anhydride or a carboxylic acid ester having up to 30 carbon atoms in the carboxylic portion.

2. A catalyst for polymerizing olefins according to claim 1, wherein said organomagnesium component (i) is a hydrocarbon-soluble organomagnesium complex compound,

wherein

.alpha. is a number greater than 0,

M is an atom selected from the group consisting of aluminum, boron, zinc and beryllium, and

X and Y are groups other than halogen, respectively.

3. A catalyst for polymerizing olefins according to claim 1, wherein said organomagnesium component (i) is a hydrocarbon soluble organomagnesium compound,

wherein

.alpha. is 0, and

X and Y are groups other than halogen, respectively.

4. A catalyst for polymerizing olefins according to claim 2, wherein the ratio of .beta./.alpha. is in the range of 0.5-10.

5. A catalyst for polymerizing olefins according to claim 2, wherein the ratio of (r+s)/(.alpha.+.beta.) is in the range of 0-0.8.

6. A catalyst for polymerizing olefins according to claim 1, wherein said titanium compound (A) (2) is a titanium tetrachloride.

7. A catalyst for polymerizing olefins according to claim 1, wherein said titanium compound (A) (2) is titanium trichloride.

8. A catalyst for polymerizing olefins according to claim 1, wherein said titanium compound (A) (2) is a tetravalent titanium halide or a trivalent titanium halide.

9. A catalyst for polymerizing olefins according to claim 1, wherein said titanium compound (A) (2) is titanium tetrachloride or titanium trichloride.

10. A catalyst for polymerizing olefins according to claim 1, wherein said carboxylic acid or derivative thereof (A) (3) is used in 0.001-50 times the molar amount of the hydrocarbon groups included in the solid obtained by reacting the organo-magnesium component and chlorosilane compound containing Si--H bonds.

11. A catalyst for polymerizing olefins according to claim 1, wherein said organometallic compound (B) is a hydrocarbon soluble organomagnesium complex compound having the general formula

M.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.2

wherein

.alpha. and .beta. are numbers greater than 0,

.beta./.alpha. is in the range of 0.1-10,

p, q, r and s are 0 or a number greater than 0, respectively, having the relationships p+q+r+s=m.alpha.+2.beta. and 0.ltoreq.(r+s)/(.alpha.+.beta.)<1.0

wherein

M is an atom selected from the group consisting of aluminum, zinc, boron and beryllium,

m is the valency of M,

R.sup.1 and R.sup.2 the same or different hydrocarbon groups having 1-20 carbon atoms,

X and Y are the same or different groups selected from the group consisting of OR.sup.3, OSiR.sup.4 R.sup.5 R.sup.6, NR.sup.7 R.sup.8 and SR.sup.9

wherein

R.sup.3, r.sup.4, r.sup.5, r.sup.6, r.sup.7 and R.sup.8 are hydrogen atoms or a hydrocarbon group having 1-20 carbon atoms, and

R.sup.9 is a hydrocarbon group having 1-20 carbon atoms.

12. A catalyst for polymerizing olefins according to claim 11, wherein M of said organomagnesium complex compound is an aluminum atom.

13. A polymerization catalyst according to claim 1, wherein said organometallic compound (B) is an organoaluminum compound having the general formula

AlR.sub.t.sup.10 Z.sub.3-t

wherein

R.sup.10 is a hydrocarbon group having 1-20 carbon atoms,

Z is a member selected from the group consisting of hydrogen, halogen, alkoxy, aryloxy and a siloxy group, and

t is from 2-3.

14. A polymerization catalyst according to claim 13, wherein said organoaluminum compound is a trialkylaluminum or a dialkylaluminum hydride.

15. A polymerization catalyst according to claim 1, wherein said component (B) consisting of an organoaluminum compound and a carboxylic acid or its derivative is used by adding separately the product obtained by first reacting one part of an organoaluminum component having the general formula

AlR.sub.t.sup.10 Z.sub.3-t

wherein

R.sup.10 is a hydrocarbon group having 1-20 carbon atoms,

Z is a member selected from the group consisting of hydrogen, halogen, alkoxy, aryloxy and siloxy group,

with a carboxylic acid or its derivative, and then adding the remaining organoaluminum compound.