| abstract |
(57) [Summary] [Structure] The following formula: (In the formula, R 1 is a monovalent hydrocarbon group such as an alkyl group, Rf is a perfluoroalkyl group or a perfluoroalkyl ether group) is polymerized with a fluorine-containing cyclotrisiloxane represented by a lithium silanolate catalyst, and the resulting polymerization product is heated under reduced pressure to volatilize. A chain organopolysiloxane is produced by removing the components. [Effect] In the chain polyorganosiloxane obtained by this method, the content of the volatile low-molecular-weight siloxane contained as an impurity is suppressed to substantially zero or a very small amount. Therefore, when this chain polyorganosiloxane is used for various purposes, various problems caused by the presence of volatile low-molecular-weight siloxane, such as electrical contact trouble due to volatilization of low-molecular-weight siloxane from a rubber cured product (especially in the electrical field) ), Problems such as environmental pollution (especially in the field of construction) are effectively avoided. |