Method for preparing a polyorganosiloxane and a polyorganosiloxane

Abstract

A polyorganosiloxane resin represented by the following general formula (5): (R 3 SiO 1/2 ) l′ (R 2 SiO 2/2 ) m′ (RSiO 3/2 ) n′ (SiO 4/2 ) o′ (5) wherein R is, independently of each other, a hydrogen atom or a monovalent hydrocarbon group having 1 to 18 carbon atoms, and optionally having an oxygen, halogen, nitrogen or sulfur atom; l′, m′ and o′ are, independently of each other, an integer of from 0 to 10,000; n′ is an integer of from 1 to 10,000; a total of l′, m′ and n′ is from 2 to 30,000; and at least one R is a hydrogen atom and at least one R is an —OX group in the molecule, wherein X is an alkyl group having 1 to 10 carbon atoms or an alkoxyalkyl group having 2 to 10 carbon atoms; and at least one hydrogen atom and at least one —OX group bond to one and the same silicon atom.

1 . A polyorganosiloxane represented by the following formula (9): 
       
         
           
           
               
               
           
         
         wherein R 1  is, independently of each other, a monovalent hydrocarbon group having 1 to 18 carbon atoms, and optionally having an oxygen, halogen, nitrogen or sulfur atom; R 2  is, independently of each other, a hydrogen atom or R 1 ; R 3  is, independently of each other, R 1  or an —OX group; R 5  is, independently of each other, a hydrogen atom, an alkenyl group having 2 to 10 carbon atoms, or 3-glycidyloxypropyl group, provided that, when at least one R 3  bonding to the silicon atom at the end is an —OX group, R 5  bonding to this silicon atom is not a hydrogen atom; X is, independently of each other, an alkyl group having 1 to 10 carbon atoms or an alkoxyalkyl group having 2 to 10 carbon atoms; t is 0 or 1; s is an integer of from 1 to 20; when t is 0, s′ is 0; when t is 1, s′ is s; q is an integer of 1 or more; and the siloxane units in the square brackets may form a block structure or a random structure. 
       
     
     
         2 . The polyorganosiloxane according to  claim 1 , wherein t is 0 and q is 1 in said formula (9). 
     
     
         3 . The polyorganosiloxane according to  claim 1 , represented by the following formula.