Patent ID: 6943264

Claim:
A method for preparing a branched siloxane of the general formula (2), comprising the step of: reacting a branched siloxane compound of the general formula (2) containing a compound of the general formula (1) as an impurity with a disiloxane compound of the general formula (3) in the presence of an acid compound, for forming a branched siloxane of formula (2) containing a reduced level of the compound of formula (1), R 1 n Si(OSiR 2 3 ) 3-n (OR 3 ) (1) wherein R 1 is a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms, R 2 and R 3 are selected from hydrogen and substituted or unsubstituted monovalent hydrocarbon groups of 1 to 20 carbon atoms, R 2 may be the same or different, n is equal to 0 or 1, R 1 n Si(OSiR 2 3 ) 4-n (2) wherein R 1 , R 2 and n are as defined above, R 2 3 SiOSiR 2 3 (3) wherein R 2 is as defined above.