Patent ID: 8686175

Claim:
A process for preparing siloxanes, comprising: reacting at least two siloxanes in the presence of an ion exchange resin catalyst comprising from 6 to 19 weight % water; recovering the ion exchange resin catalyst after the reacting; adding water to the ion exchange resin catalyst to bring the ion exchange resin to from 6 to 19 weight % water, based upon the dry weight of the ion exchange resin catalyst; and reacting at least two siloxanes in the presence of the ion exchange resin catalyst, wherein the at least two siloxanes comprise a first siloxane and a second siloxane, the first siloxane having units of the general formula R a SiO (4-a)/2 , wherein each R is independently a hydrogen or a C 1 -C 20 hydrocarbyl group and â€œaâ€ has a value from 0 to 3; and the second siloxane having a formula MD x M wherein M is R 3 SiOâ€” and D is â€”SiR 2 Oâ€”.