JPH0710889A - Silane compound and its production - Google Patents

Abstract

PURPOSE:To obtain a new compound, used as a catalyst component for propylene, capable of giving polypropylene in high stereoregularity and activity and further useful as a silane coupling agent, a resin modifying agent, etc. CONSTITUTION:The objective cyclopentyl(2-methyl-3-butyn-2-oxy)dimethoxysilane is expressed by formula I. The compound is obtained by reacting a cyclopentyltrihalosilane expressed by formula II (X is halogen, preferably Cl or Br) with 2-methyl-3-butyn-2-ol expressed by formula III, preferably in the presence of pyridine or quinoline as a hydrogen halide acceptor at 40-70 deg.C for 30min to 2hr and then reacting the resultant reactional product, preferably in the presence of a hydrogen halide acceptor such as pyridine at 10-60 deg.C for 30min to 2hr. Furthermore, the compound expressed by formula II is preferably obtained by subjecting cyclopentene and a trihalosilane to the hydrosilylating reaction.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a novel silane compound and a method for producing the same, and more particularly to a novel silane compound used as a propylene polymerization catalyst component, a silane coupling agent and the like and a method for producing the same.

[0002]

2. Description of the Related Art It has been conventionally known that a polymer having a high stereoregularity can be produced by using an alkoxysilane as a catalyst component in carrying out propylene polymerization. However, even if propylene is polymerized using a catalyst component produced using a conventionally known alkoxysilane or the like, both high polymerization activity and high stereoregularity cannot be sufficiently satisfied.

Further, the silane compound is expected to be used as a silane coupling agent or a resin modifier, and therefore, a new silane compound is desired to appear.

Therefore, an object of the present invention is to provide a novel silane compound having high activity and high stereoregularity, which is useful as a propylene polymerization catalyst component or a silane coupling agent, and a method for producing the same.

[0005]

The present invention firstly provides the following formula (I):

[0006]

[Chemical 2] And a cyclopentyl (2-methyl-3-butyne-2-oxy) dimethoxysilane.

This silane compound (I) has a boiling point of 59 ° C.
/0.1 mmHg. The structure of this silane compound is GC
-MS, ¹ H-NMR, infrared absorption spectrum (IR)
Etc. can be confirmed.

For example, when the compound (I) is analyzed using ¹ H-NMR, δ = 1.4 to 2.2, a methyl group and a cyclopentyl group bonded to a carbon atom, δ = 2.2, a hydrogen atom on a triple bond carbon, δ A signal based on a methyl group bonded to an oxygen atom was observed at = 3.6.

Further, from the analysis by IR spectrum,
1100cm large absorption based on SiOC bond in the vicinity of ^-1, and around 3308Cm ^-1 and 2343Cm ^-1 absorption due to carbon triple bond was observed.

From the analysis by GC-MS, the following m
/ E (spectral intensity ratio) was observed: 227 (13.37), 1
73 (100), 159 (21.02), 131 (9.08), 115 (40.27), 107 (28.3
2), 77 (27.04).

By using this silane compound (I) as a catalyst component, an olefin polymer having high stereoregularity such as polypropylene or polybutene can be produced with high polymerization activity.

Since the silane compound (I) has a hydrolyzable group, it can be used as a silane coupling agent, a polymerizable monomer and a resin modifier.

The present invention secondly provides a method for producing a novel silane compound represented by the above formula (I). That is, cyclopentyltrihalosilane was added to 2-methyl-3-butyne-2-
A silane compound of the above formula (I) is produced by reacting with all and then reacting the obtained reaction product with methanol. The raw material cyclopentyltrihalosilane has the following formula:

[0014]

[Chemical 3] (X represents a halogen atom, preferably Cl or B
is r) and can be readily prepared from cyclopentene and trihalosilane (H—SiX ₃ ) by a hydrosilylation reaction:

[0015]

[Chemical 4] At this time, per mol of cyclopentene, trihalosilane
Use 0.9 to 1.1 moles. The reaction conditions are, for example,
The temperature is 100 to 200 ℃, 10 minutes to 10 hours, platinum-based catalyst, such as chloroplatinic acid, platinum-1,1,3,3-tetramethyl-
It is preferable to use a 1,3-divinyldisiloxane complex or the like. A solvent can also be used, and examples thereof include benzene and toluene.

In the present invention, the cyclopentyltrihalosilane (II) thus obtained is treated with 2-methyl-3-butyne.
-2-React with all:

[0017]

[Chemical 5] In carrying out this reaction, 1 to 3 mol of 2-methyl-3-butyn-2-ol is used with respect to 1 mol of cyclopentyltrihalosilane (II). The reaction is carried out, for example, at a temperature of 20 to 100 ° C. for 10 minutes to 5 hours, preferably at a temperature of 40 to 70 ° C. for 30 minutes to 2 hours. A solvent can also be used, and examples thereof include organic solvents such as hexane, ether, petroleum ether, and benzene.

Here, in order to allow the reaction to proceed rapidly, it is preferable to coexist with a hydrogen halide acceptor. As the hydrogen halide acceptor, tertiary amines,
And nitrogen-containing heterocyclic compounds such as pyridine, quinoline, isoquinoline and the like. Of these, pyridine and quinoline are preferably used. The hydrogen halide acceptor is 1 mole to 1 mole of cyclopentyltrihalosilane.
It is preferably used in an amount of .about.1.5 mol.

In the present invention, next, the obtained reaction product (III) is reacted with methanol to produce the above-mentioned silane compound (I) of the present invention.

[0020]

[Chemical 6] In this reaction, 2 to 5 mol of methanol is used with respect to 1 mol of the compound (III). The reaction is carried out at a temperature of 0 to 100 ° C for 10 minutes to 5 hours, preferably at a temperature of 10 to 60 ° C for 30 minutes to 2 hours. Also in the reaction C, it is preferable to coexist with a hydrogen halide acceptor in order to allow the reaction to proceed rapidly. As the hydrogen halide acceptor, the reaction B was previously used.
The hydrogen halide acceptor exemplified in 1) can be used.
The hydrogen halide acceptor used here may be the same as or different from the compound used in the previous reaction,
Usually, the same one is used. The hydrogen halide acceptor is preferably used in an amount of 2 to 3 mol with respect to 1 mol of the compound (III).

Further, in the above-mentioned reaction B and reaction C, by blowing an inert gas, the produced hydrogen halide can be removed from the reaction system to allow the reaction to proceed rapidly.

By the above-mentioned production method, the novel silane compound (I) can be obtained in high yield.

The present invention also provides a method different from the above for producing the silane compound represented by the above formula (I). That is, cyclopentyltrimethoxysilane
Method for producing compound of formula (I) by alcohol exchange reaction with 2-methyl-3-butyn-2-ol to introduce 2-methyl-3-butyn-2-oxy group to the above silane compound Is:

[0024]

[Chemical 7] In the above reaction formula, relative to 1 mol of compound (IV),
Use 1-20 mol of 2-methyl-3-butyn-2-ol.
The reaction is carried out, for example, at a temperature of 0 to 100 ° C. for 10 minutes to 20 hours. In this alcohol exchange reaction, as a catalyst,
An acid, such as a trifluoroborane-ether complex, toluenesulfonic acid, or one that reacts with an alcohol to form an acid, such as trimethylchlorosilane; or a base, such as an alkali metal alkoxide or a metal hydroxide, can be used. .

Cyclopentyltrimethoxysilane (IV) which is a starting material can be produced by a reaction of cyclopentyltrichlorosilane and methanol with generation of hydrogen chloride.

[0026]

The present invention will be described in more detail by the following examples. Example 1 Cyclopentyl (2-methyl-3-butyne-2-oxy) dime
Production of Toxysilane (1) In a 100 ml pressure vessel, 13.9 g (0.204 mol) of cyclopentene, 25.1 g (0.185 mol) of trichlorosilane and
Charge 25 μl of 0.077 mmol / ml chloroplatinic acid in isopropyl alcohol (platinum content 1.92 × 10 ⁻⁶ mol),
Cyclopentyl trichlorosilane was quantitatively obtained by stirring at 150 ° C. for 30 minutes.

A 500 ml three-necked flask equipped with a magnetic stirrer, a reflux condenser and a dropping funnel was charged with the cyclopentyltrichlorosilane obtained above and 300 ml of hexane, and 49.3 g (0.623 mol) of pyridine and 2- A mixture of methyl-3-butyn-2-ol (18.7 g, 0.222 mol) was added dropwise at room temperature with stirring for 30 minutes. After refluxing for 2 hours, 18.4 g (0.575 mol) of methanol was added thereto, and refluxing was continued for another hour, and then the reaction was terminated.

The formed salt was removed by filtration, hexane was then distilled off, and the residue was distilled under reduced pressure to give a boiling point of 59 ° C./0.1 mmHg (digital vacuum gauge, manufactured by Hayasaka Riko Co., Ltd.,
31.7 g (0.131 mol) of a liquid having a resolution of 0.1 mmHg) was obtained. This product is cyclopentyl (2-methyl-3-butyne
-2-oxy) dimethoxysilane, GC-M
Confirmed by S, ¹ H-NMR and IR. ¹ H-
The measurement results of NMR and IR are shown in FIG. 1 and FIG. 2, respectively.
It was shown to. The yield was 71%.

¹ H-NMR, IR and GC-M
S was measured under the following conditions.

¹ H-NMR measuring device: HITACHI R-1500 (manufactured by Hitachi, Ltd.), measuring solvent: C ₆ D ₆ , standard substance: residual benzene IR measuring device: 1600 series FT-IR (manufactured by Perkin Elmer Co., Ltd.) ) Measuring method: Liquid film method (KBr plate) GC-MS measuring apparatus: HP 5970B (manufactured by Hewlett-Packard Co.) Example 2 Cyclopentyl (2-methyl-3-butyne-2-oxy) dim
(2) To a 100-ml three-necked flask equipped with a magnetic stir bar and a reflux condenser, 12 g of cyclopentyltrimethoxysilane (6
3.2 mmol), 2-methyl-3-butyn-2-ol 8.2 g
(97 mmol) and 70 mg of sodium methoxide (1.
(3 mmol) was charged and reacted at room temperature with stirring for 3 hours. Then, by adding trimethylchlorosilane to neutralize the alkali, and then distilling under reduced pressure, cyclopentyl (2-methyl-3-butyne-2-oxy)
11.1 g (46 mmol) of dimethoxysilane was obtained. The structure was confirmed in the same manner as in Example 1. The yield was 73%.

[0031]

According to the present invention, it is possible to provide a novel silane compound useful as a propylene polymerization catalyst component, a silane coupling agent and the like, and a method for producing the same.

[Brief description of drawings]

1] Cyclopentyl (2-methyl produced in Example 1
-3-Butyne-2-oxy) dimethoxysilane ¹ H-NM
It is a chart which shows the result of R spectrum analysis.

2 is a cyclopentyl (2-methyl prepared in Example 1
3 is a chart showing the results of IR spectrum analysis of -3-butyne-2-oxy) dimethoxysilane.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Satoshi Ueki 1-3-3 Nishitsurugaoka, Oi-cho, Iruma-gun, Saitama Tonen Research Institute

Claims (3)

[Claims] 1. The following formula (I): A silane compound represented by. 2. The production of a silane compound according to claim 1, wherein cyclopentyltrihalosilane is reacted with 2-methyl-3-butyn-2-ol, and then the obtained reaction product is reacted with methanol. Method. 3. Cyclopentyltrimethoxysilane and 2-
The method for producing a silane compound according to claim 1, wherein a 2-methyl-3-butyne-2-oxy group is introduced into the silane compound by an alcohol exchange reaction with methyl-3-butyn-2-ol.