Unlock instant, AI-driven research and patent intelligence for your innovation.

Process for producing alpha-olefin polymerization catalyst

An olefin polymerization and catalyst technology, applied in the field of preparing α-olefin polymerization catalyst, can solve the problems of high rigidity, poor responsiveness, low molecular weight, etc.

Inactive Publication Date: 2010-08-04
SUMITOMO CHEM CO LTD
View PDF12 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, those polymerization catalysts may be poor in their responsiveness to hydrogen, which is industrially used as a good molecular weight regulator for α-olefin polymers, so that it is necessary to use a large amount of hydrogen in order to prepare its low molecular weight Polypropylene with high rigidity
However, the use of large amounts of hydrogen is one of the limitations of the process used to prepare α-olefin polymers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for producing alpha-olefin polymerization catalyst
  • Process for producing alpha-olefin polymerization catalyst
  • Process for producing alpha-olefin polymerization catalyst

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0157] Examples of the α-olefin polymer produced by the production method of the present invention are propylene homopolymer, 1-butene homopolymer, propylene-ethylene copolymer, propylene-1-butene copolymer, propylene-1-hexene Copolymer, and propylene-1-octene copolymer.

[0158] The process for preparing the α-olefin polymers of the present invention is preferably used for the preparation of isotactic stereoregular α-olefin polymers, and particularly preferably for the preparation of isotactic stereoregular propylene polymer.

[0159] Examples of isotactic propylene polymers are propylene homopolymers; copolymers of propylene with ethylene and / or comonomers such as alpha-olefins having 4 to 12 carbon atoms, wherein ethylene and / or comonomers The amount of monomer used is such that the obtained copolymer has crystallization properties; and the block copolymer obtained according to the preparation method comprising the following steps: (i) homopolymerizing propylene, or combin...

Embodiment 1

[0170]A 300 liter stainless steel reaction vessel equipped with a stirrer was dried under reduced pressure and then purged with argon. Cool the autoclave, then evacuate. To a glass charger containing heptane, add 2.6 mmol of triethylaluminum (organoaluminum compound), 0.52 mmol of cyclohexyltriethoxysilane (external electron donor), and 6.39 mg of 182981A, the solid catalyst components prepared in Example 1(2), in this order, thereby bringing them into contact with each other in a glass filler to form a polymerization catalyst-containing mixture.

[0171] The mixture was added to the autoclave all at once. Then, 780 g of liquefied propylene (α-olefin) and 5.1 NL of hydrogen were charged into the reactor in this order. The autoclave was heated to 70°C, whereby polymerization was initiated.

[0172] After 1 hour of polymerization, unreacted propylene remaining in the reactor was purged to obtain a polymer. The polymer was dried at 60° C. for 1 hour under reduced pressure, th...

Embodiment 2

[0196] Example 1 was repeated except that (1) the amount of the solid catalyst component was changed to 5.44 mg, and (2) the amount of added hydrogen was changed to 15.4 NL, whereby a propylene homopolymer powder was obtained. The yield of propylene homopolymer per 1 g of solid catalyst component was 25,500 g-polymer / g-solid catalyst component (polymerization activity).

[0197] The propylene homopolymer was found to have a soluble fraction (CXS) in xylene at 20° C. of 0.90 wt %; an intrinsic viscosity ([η]) of 0.75 dl / g; and an isotactic pentad fraction of 0.9829 [ mmmm], the total amount of homopolymer is 100 wt%. The results are summarized in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A production process of an [alpha]-olefin polymerization catalyst, comprising the steps of (1) reducing a titanium compound represented by a defined formula with an organomagnesium compound in the presence of an Si-O bond-containing silicon compound, (2) contacting the resultant solid catalyst component precursor, a halogenating compound and an internal electron donor with one another, and (3) contacting the resultant solid catalyst component, an organoaluminum compound and a Si-containing external electron donor represented by a defined formula with one another; and a production process of an olefin polymer using the above catalyst.

Description

technical field [0001] The present invention relates to a method for preparing an α-olefin polymerization catalyst, and a method for preparing an α-olefin polymer. Background technique [0002] JP 7-216017A (equivalent to US 5,608,018A) discloses a polymerization catalyst capable of preparing highly stereoregular α-olefin polymers, which is prepared according to a process comprising the following steps: (i) reducing the titanium compound with an organomagnesium compound in the presence of a silicon compound and an ester compound, thereby obtaining a solid component containing a magnesium atom, a titanium atom, and a hydrocarbyloxy group, (ii) treating the solid component with the ester compound, and (iii) bringing the thus-treated solid component into contact with a halogenated compound (for example, titanium tetrachloride) and an electron donor (for example, an ether compound or a mixture of an ether compound and an ester compound), thereby obtaining a trivalent titanium co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/658C08F4/656C08F4/654
CPCC08F110/06C08F10/06C08F4/6465C08F4/6494C08F4/6492C08F4/6565C08F2500/15C08F2500/17
Inventor 藤原靖己
Owner SUMITOMO CHEM CO LTD