Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Young Hee Kim0
Kwang Soo Kim0
Kyung Ja Kim0
Soo Ryong Kim0
Dae Hyun Cho0
Doh Hyung Riu0
Dong Geun Shin0
Dong Won Lim0
...
Date of Patent
April 10, 2007
Patent Application Number
10851693
Date Filed
May 21, 2004
Patent Primary Examiner
Patent abstract
The present invention is related to a method of producing polycarbosilane by heating polydimethylsilane at low pressure within the range of 320˜450° C. using zeolite having the Si/Al or Si/B ratio of 1˜200 as catalyst. This invention uses a zeolite with the structure of ZSM-5, ZSM-11, ZSM-12, zeolite X and zeolite Y, which has the Si/Al or Si/B ratio of 1˜200, as catalyst. When polycarbosilane is produced using a specific zeolite as catalyst, Si/Al or Si/B ratio can be adjusted at any proportion, enabling acidity control of catalyst, and therefore the molecular weight of final products can be easily controlled and the product yield can be improved, compared to conventional solid acid catalysts.
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