this invention relates to fluoroalkyloxyalkyl diorganopolysiloxanes having the general formula ## str1 ## where r 1 represents fluoroalkyloxyalkyl groups of the general formula --. sub . a -- o -- c . sub . b f . sub . 2b h in which the hydrogen atom is in the beta position to the ether oxygen , a is 2 , 3 or 4 ; b is an integer having a value of from 1 to 6 ; r 2 represents an alkyl group having from 1 to 8 carbon atoms whose terminal units may also contain an amino or a thiol group , or an alkenyl group having 2 or 3 carbon atoms , or an aryl group having from 6 to 8 carbon atoms or hydrogen ; r 3 represents the group having the formula --. sub . c -- c . sub . d f . sub . hal . sub . e , in which hal represents a terminal chlorine , bromine or iodine atom , c is 2 , 3 or 4 ; d is an integer having a value of from 1 to 18 ; e is 0 or 1 ; r 4 , r 5 and r 6 are the same as r 2 ; x and y are the same or different and represent condensable terminal groups or trialkylsiloxy groups in which the alkyl groups have from 1 to 6 carbon atoms ; m has a value of from 0 . 05 to 0 . 9 ; n has a value of from 0 to 0 . 6 ; and p has a value of from 0 . 1 to 0 . 8 with the proviso that the sum of m + n + p = 1 .