| abstract |
(57) [Summary] (Modified) [Constitution] A siloxane of the formula [I]. A process for producing disiloxane, which comprises reacting a compound of formula [II] with a disiloxane of formula [III]. F 1 -Q-Z-M [ II] X-D-Si (R 1) 2 -O-Si (R 1) 2 -D-X [III] (wherein F 1 is a functional group directly bonded to Q or bonded through an intermediate group (preferably an aliphatic group); Q is a (substituted) cyclic group ; Z is 0, SO 2 N H, NHSO 2 , NHCO, COO and the like; D is a (substituted) idrocarbylene group; R 1 to R 6 are (substituted) hydrocarbyl groups; x, y and z are each 0 to It has a value of 100; however, when Z is --O--, F 1 does not represent an amino group.) [Effect] The polysiloxane has flexibility, stretchability and impact resistance, and resistance to wide-range radiation. Imparts ozone resistance, corona discharge resistance and oxidation resistance. It lowers T g , facilitates processing and molding, reduces friction coefficient, increases solubility, acid resistance, and gas permeability. |