Patent ID: 7582700

Claim:
A process for preparing emulsions of highly viscous organopolysiloxanes having a viscosity of at least 10,000 mPa·s, comprising reacting siloxanes (1) comprising units of the formula A a ⁢ ⁢ R c ⁢ ⁢ ( OR 1 ) d ⁢ ⁢ SiO 4 - ( a + c + d ) 2 ( I ) where A each independently is a monovalent, Si—C-bonded radical having basic nitrogen, R is each independently a monovalent, optionally substituted hydrocarbon radical having from 1 to 18 carbon atoms per radical, R 1 are each independently a hydrogen atom or an alkyl radical having from 1 to 8 carbon atoms, a each independently is 0 or 1, c each independently is 0, 1, 2 or 3 and d each independently is 0 or 1, with the proviso that the sum of a+c+d is ≦3 and, on average, at least one A radical and at least one R 1 radical where R 1 is a hydrogen atom are present per molecule, siloxanes (2) composed of units of the formula R c ⁢ ⁢ ( OR 1 ) d ⁢ ⁢ SiO 4 - ( c + d ) 2 ( II ) where R, R 1 , c and d are each as defined above, with the proviso that the sum of c+d is ≦3 and at least one R 1 radical where R 1 is a hydrogen atom are present per molecule, or a mixture of siloxanes (1) and (2), with silanes (3) of the formula BR 3 Si(OR 3 ) 3-e (III) where B each independently is a monovalent radical of the formula —CR 2 2 —Y, R 2 each independently is a hydrogen atom or an alkyl radical having from 1 to 4 carbon atoms, Y each independently is a monofunctional radical selected from the group consisting of the halogens, monosubstituted O and S atoms, and substituted N and P atoms, R 3 each independently is an alkyl radical having from 1 to 8 carbon atoms per radical and e is 0, 1 or 2, in the presence of dispersion medium (4) and optionally emulsifiers (5).