PROCESS FOR PREPARING 2-HYDROXYPHENYL ALKENYL BENZOTRIAZOLE COMPOUNDS AND PROCESS FOR PREPARING SILOXANE COMPOUNDS CONTAINING 2-HYDROXYPHENYL BENZOTRIZOLE FUNCTION
The process for preparing 2-hydroxyphenyl alkenyl benzotriazole compounds and the process for preparing siloxane compounds containing 2-hydroxyphenyl benzotriazole function are disclosed.
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(2012/05/19)
Method for synthesizing benzotriazole
A method for synthesizing benzotriazole comprises acts of: preparing a first solvent comprising 2-(2-hydroxy-5-methylphenyl) benzotriazole, a basic agent and molecular sieves and a second solvent comprising 3-chloro-2-alkyl propylene; mixing the solvents; and heating the solvents. This method requires only one reaction vessel and produces few by-products, therefore is simpler and cheaper to produce. Furthermore, the molecular sieves are cheaper than catalysts in conventional reactions and may be recycled, giving even greater economic benefits.
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(2009/10/31)
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