Organosilicon compound, method for producing thereof, and use thereof

A method for producing an organosilicon compound having not more than 200 silicon atoms per molecule, and represented by the following average compositional formula (I):

• YaR1bSiO(4-a-b)/2 (I)
• wherein R1 is an alkyl group having 1 to 12 carbon atoms, alkenyl group having 2 to 12 carbon atoms, aryl group having 6 to 20 carbon atoms, alkoxy group having 1 to 6 carbon atoms, or a hydroxyl group;
• Y is an acylphosphinate residue represented by the following general formula (II):
• wherein R2 is a non-substituted or halogen-substituted alkyl group having 1 to 12 carbon atoms, a non-substituted or halogen-substituted aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms;
• R3 is a linear or branched alkylene group having 1 to 12 carbon atoms;
• R4 is an alkylene group having 2 to 6 carbon atoms;
• Ar is a non-substituted, an alkoxy-substituted, or a halogen-substituted aryl group having 6 to 20 carbon atoms;
• and subscript m is an integer of from 0 to 100;
• and
• subscripts a and b are numbers satisfying the following conditions:
• 0<a≤2, 0<b≤3, and a≤b;
• the method comprising the following steps:
• i) reacting an organosilicon compound represented by the following average compositional formula (IV):
• ZaR1bSiO(4-a-b)/2 (IV)
• wherein R1 and subscripts a and b are each as described above;
• and Z is a group represented by the following general formula (V):
• wherein R3, R4 and subscript m are each as described above;
• with an organophosphine compound represented by the following general formula (VI):
• wherein R2 is as described above;
• and X are the same or different halogen atoms, to obtain a reaction product;
• and then
• ii) reacting the reaction product of step i) with a carboxylic halide represented by the following general formula (VII):
• wherein X and Ar are each as described above.