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Catalyst for bulk polymerization, catalyst for vapor phase polymerization, method of polymerization using these and olefymer obtained with these

An olefin polymer and bulk polymerization technology, applied in the field of olefin polymers, can solve the problems of reduced melt flow rate of olefin polymers, increased hydrogen partial pressure, and reduced monomer partial pressure, etc.

Inactive Publication Date: 2002-07-10
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] That is, the melt flow rate of the olefin polymer is reduced using conventional catalysts, so large amounts of hydrogen have to be used
[0012] (2) In the case of preparing an olefin polymer having a high melt flow rate by bulk polymerization or gas phase polymerization using the above-mentioned catalyst, the stereoregularity of the obtained olefin polymer will inevitably decrease, which is a problem
Therefore, from the viewpoint of ensuring safety, it is necessary to improve the pressure resistance of the manufacturing equipment, which is a problem
[0015] (4) In addition, in the case of using the above-mentioned catalyst, if a large amount of hydrogen is used, the hydrogen partial pressure during bulk polymerization or gas phase polymerization will increase, and at the same time the monomer partial pressure will be relatively reduced. The problem
Therefore, the productivity of olefin polymers will decrease accordingly, which is a problem

Method used

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  • Catalyst for bulk polymerization, catalyst for vapor phase polymerization, method of polymerization using these and olefymer obtained with these
  • Catalyst for bulk polymerization, catalyst for vapor phase polymerization, method of polymerization using these and olefymer obtained with these
  • Catalyst for bulk polymerization, catalyst for vapor phase polymerization, method of polymerization using these and olefymer obtained with these

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0355] (1) Preparation of solid catalyst components

[0356] ①The process of contacting component (a) and component (d)

[0357] A three-necked flask having a capacity of 0.5 liter and equipped with a stirrer was replaced with nitrogen, and then 16 g of diethoxymagnesium and 80 ml of dehydration-treated octane were added thereto as components (a).

[0358] Then, the temperature in the three-necked flask was raised to 40° C. by heating, and then 2.4 ml of silicon tetrachloride was added thereto as the component (d), followed by stirring for 20 minutes in this state.

[0359] ② Process of contacting with (c) component

[0360] Then, 3.4 ml of dibutyl phthalate as the component (c) was added to the three-necked flask.

[0361] ③Contact step 1 with component (b)

[0362] Then, the temperature in the three-necked flask was raised to 80° C., and then 77 ml of titanium tetrachloride as the component (b) was added to the flask using a titration funnel.

[0363] ④Contact step 2 wit...

Embodiment 2～4

[0383] Except that in Example 2, the hydrogen partial pressure during propylene polymerization was 0.25 MPa (gauge pressure), in Example 3, the hydrogen partial pressure during propylene polymerization was 0.5 MPa (gauge pressure) and in Example 4, the propylene Propylene was bulk polymerized in the same manner as in Example 1 except that the hydrogen partial pressure during polymerization was 0.75 MPa (gauge pressure), and the obtained polypropylene was evaluated. The obtained results are shown in Table 1 and part of the results are shown in figure 1 middle.

Embodiment 5

[0391] (1) Preparation of solid catalyst components

[0392] A solid catalyst component was prepared in the same manner as in Example 1.

[0393] (2) Polymerization method

[0394] The inner space of a 7-liter stainless steel autoclave equipped with a stirring device was replaced with nitrogen, and the temperature in the autoclave was maintained at 70°C.

[0395] Then, propylene gas was introduced into the autoclave so that the pressure thereof became 0.05 MPa (gauge pressure), and hydrogen gas was similarly introduced so that the pressure thereof became 0.03 MPa. Further, propylene gas was gradually introduced so that the total gas pressure became 2.8 MPa (gauge pressure).

[0396] Then add 20 ml of heptane, 2 mmol of triethylamine as (B) component, and cyclohexylisobutyldimethoxysilane as (C) component in the autoclave through a 60 ml catalyst feed tube replaced by nitrogen. 0.5 mmol of the solid catalyst component (corresponding to 0.005 mmol of Ti atoms) prepared in (1)...

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Abstract

The present invention provides a catalyst for bulk or vapor-phase polymerization having high polymerization activity during bulk or vapor-phase polymerization and providing an olefin polymer having excellent properties in melt flow rate and stereoregularity by adding a small amount of hydrogen. The catalyst for bulk or vapor-phase polymerization of an alpha -olefin compound under a presence of hydrogen, the catalyst is made by contacting the following ingredients (A) to (C). (A) a solid catalyst ingredient, comprising: (a) a magnesium compound, (b) titanium tetrachloride, and (c) dialkyl phthalate (Each of the alkyl group denotes a straight-chain or branched-chain hydrocarbon group having a carbon number of 3 to 20.); (B) an organoaluminum compound; and (C) an organosilicon compound, which is expressed by the following general chemical formula (1). (R<1>) (R<2>CH2) Si (OR<3>) (OR<4>)

Description

technical field [0001] The present invention relates to a catalyst for bulk polymerization of α-olefin compounds, a catalyst for gas phase polymerization, a method for polymerizing α-olefin compounds using the catalyst, and an olefin polymer obtained using the catalyst. [0002] More specifically, the present invention relates to catalysts for bulk polymerization and catalysts for gas-phase polymerization (sometimes simply referred to as catalysts) in which an α-olefin compound as a raw material monomer is subjected to bulk polymerization in the presence of hydrogen. During polymerization or gas phase polymerization, these catalysts have high polymerization activity, and by adding a small amount of hydrogen, any one of said catalysts can lead to the formation of olefin polymers with excellent melt flow rate and stereoregularity; the present invention It also relates to a polymerization method of an α-olefin compound using these polymerization catalysts, and an olefin polymer p...

Claims

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Application Information

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IPC IPC(8): C08F2/02C08F2/34C08F4/646C08F4/654C08F4/656C08F4/658C08F110/06
CPCC08F110/06Y10S526/901Y10S526/902C08F4/6565C08F4/6465C08F2500/12C08F2500/17
Inventor 贞屿孝典金丸正实太田刚船桥英雄
Owner IDEMITSU KOSAN CO LTD
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