Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Patent
1998-05-01
1999-01-05
Shaver, Paul F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
556471, C07F 718
Patent
active
058565493
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a novel silane compound and a process for the preparation thereof, more specifically a novel silane compound which is suitable as a catalytic component for polymerization of propylene, or as a silane coupling agent, and a process for the preparation of the same.
BACKGROUND OF THE INVENTION
It is known that a polymer with high stereoregularity can be prepared by the use of alkoxy silanes as a catalytic component in the polymerization of propylene. However, it was impossible to sufficiently attain both high polymerization activity and high stereoregularity with known alkoxy silanes as a catalytic component in the polymerization of propylene.
Further, silane compounds are expected to be useful as silane coupling agents and resin modifiers. Accordingly, new silane compounds are awaited.
DISCLOSURE OF THE INVENTION
An object of the invention is to provide a novel silane compound useful as a highly active catalytic component for polymerization of propylene with high stereoregularity or as a silane coupling agent, and a process for the preparation of the same.
The present invention provides a silane compound represented by the following formula (I): ##STR1## that is, di-sec-butoxy-n-propyl methoxysilane.
The present invention secondly provides a process for the preparation of the novel silane compound represented by the aforesaid formula (I). That is, the silane compound represented by the aforesaid formula (I) is prepared by reacting n-propyl trihalosilane with sec-butanol and then reacting a resultant reaction product with methanol.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a chart of .sup.1 H-NMR on di-sec-butoxy-n-propyl methoxysilane prepared in Example 1. The curves above the peaks and the numbers below the peaks represent an area intensity of each peak.
FIG. 2 is a chart of IR on di-sec-butoxy-n-propyl methoxysilane prepared in Example 1.
BEST MODE FOR THE PRACTICE OF THE INVENTION
This silane compound (I) has a boiling point of 125.degree. C./0.1 mmHg. The structure of this silane compound may be confirmed by GC-MS, .sup.1 H-NMR, infrared absorption spectrum (IR) and so on.
When compound (I) is analyzed by .sup.1 H-NMR, signals are observed at .delta.=0.4-1.8 for the hydrogen atoms except ones bound to the carbon atoms directly bound to the oxygen atoms in the n-propyl and sec-butoxy groups, .delta.=3.5 for the hydrogen atoms bound to the carbon atoms in the methoxy group and .delta.=3.7-4.1 for the hydrogen atoms bound to the carbon atoms directly bound to the oxygen atoms in the sec-butoxy groups.
In analysis by IR spectra, a large absorption due to the SiOC bonds is observed around 1,100 cm.sup.-1.
Olefinic polymers, such as polypropylene and polybutene, with high stereoregularity can be prepared at high polymerization activity using the silane compound (I) as a catalytic component.
As the silane compound (I) has hydrolytic groups, it can be used as a silane coupling agent, a polymerizable monomer and a resin modifier.
In the present process, n-propyl trihalosilane used as a raw material is represented by the following formula (II): prepared from propylene and trihalosilane (H--SiX.sub.3) through hydrosilylation reaction: --SiX.sub.3 (II) (reaction A ) of propylene. The reaction is conducted in conditions of a temperature of 100.degree. to 200.degree. C. and 10 minutes to 10 hours, preferably with the use of a platinum catalyst such as chloroplatinic acid and platinum-1,1,3,3-tetramethyl-1,3-divinyldisiloxane complex. Solvents may also be used, such as benzene and toluene. N-propyl trihalosilane is commercially available. Such commercial products maybe used in the present invention.
In the present invention, the aforesaid n-propyl trihalosilane (II) is reacted with sec-butanol. Sec-butanol is known per se and is commercially available. The reaction is considered to proceed as follows: ##STR2## wherein sec-Bu stands for sec-butyl group, hereinafter the same. This reaction results in the formation of compound (III).
In the aforesaid r
REFERENCES:
patent: 5248803 (1993-09-01), Aoki et al.
patent: 5451693 (1995-09-01), Kubota et al.
Imanishi Kunihiko
Murata Masahide
Nakajima Masashi
Taki Takayuki
Dippert William H.
Shaver Paul F.
Tonen Corporation
LandOfFree
Silane compound and process for the preparation thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Silane compound and process for the preparation thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silane compound and process for the preparation thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-864165