| 摘要 |
The present invention relates to a highly regular and well-define structured polyorganosilsesquioxane with superior heat resistance, combustion resistance and flexibility, wherein two kinds of substituents are bonded alternately, and the preparation method thereof. The present invention provides polyorganosilsesquioxane with superior heat resistance, combustibility and flexibility. The polyorganosilsesquioxane prepared from the present invention has small molecular weight distribution and high molecular weight, and is soluble in organic solvent because a three-dimensional network structure is not formed during the condensation polymerization, which is resulted from the structure defect and randomness of the oligomer as a starting material for polymerization. Polyalkylaromaticsilsesquioxane obtained from the preparing method of the present invention is a useful heat-resistant material. It can be used for heat-resistant coating agent, protective coating agent of optical fiber, coating material for resistor, heat-resistant paint, adhesive and releasing agent for precise molding. Also, it can be used for the semiconductor protective layer, interlayer dielectrics for semiconductor integration (e.g. LSI), resist material and new heat-resistant photoresist.
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