Silicon ether compound, a method for the preparation thereof...

Details Silicon ether compound, a method for the preparation thereof... Silicon ether compound, a method for the preparation thereof...

2003-07-16

2004-11-23

Barts, Samuel (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

Reexamination Certificate

active

06822109

ABSTRACT:

CROSS REFERENCE OF RELATED APPLICATION
The present application claims priority based on CN 02125224.6, filed on Jul. 17, 2002, which is incorporated herein by reference in its entirety and for all purposes.
TECHNICAL FIELD
The present invention relates to a novel silicon ether compound, a method for the preparation thereof and use thereof in the polymerization of olefins.
BACKGROUND ART
W O 00/63261 discloses external electron donor compounds useful in olefin polymerization, i.e. silicon compounds having a general formula R
11
a
R
12
b
Si(OR
13
)
c
, wherein a and b are integer from 0 to 2, c is integer from 1 to 3, and the sum of a+b+c is 4, R
11
, R
12
and R
13
are independently C
1
-C
18
hydrocarbyl which optionally contains heteroatom. The preferred are those silicon compounds in which a is 1, b is 1, c is 2, at least one of R
11
and R
12
are selected from the group consisting of branched alkyl, alkenyl, alkylene, cycloalkyl and aryl, having from 3 to 10 carbon atoms and containing optionally heteroatom, and R
13
is C
1
-C
10
alkyl, especially methyl, for example, cyclohexylmethyldimethoxysilane. The also preferred are those silicon compounds in which a is 0, b is 1, c is 3, R
12
is branched alkyl or cycloalkyl, containing optionally heteroatom, and R
13
is methyl, for example, cyclohexyltrimethoxysilane and the like.
It is noted that when c is 1, the silicon compounds having the general formula R
11
a
R
12
b
Si(OR
13
)
c
are not deemed as good external electron donor compound. In the prior art, &ggr;-trihydrocarbylsilyloxy-ether compounds are never used as external electron donor compounds in olefin polymerization. However, the inventors surprisingly found that &ggr;-trihydrocarbylsilyloxy-ether or -silicon ether compounds exhibit good properties when used as external electron donor compounds in olefin polymerization. 9-hydrocarbyloxymethyl-9-(trihydrocarbylsilyl)oxymethyl-fluorene compounds and 9,9-bis(trihydrocarbylsilyloxymethyl)-fluorene compounds are specific &ggr;-trihydrocarbylsilyloxy-ether or -silicon ether compounds, and hitherto, no literature reporting them as well as the preparation thereof was found.


REFERENCES:
patent: WO 0063261 (2000-10-01), None

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