obtained by heating organocyclopolysiloxanes in the presence of alkali catalysts to effect equilibration reaction contain residual silanol groups the organopolysiloxanes can be stabilized by effecting silylation reaction by adding silylketeneacetal compounds to them thereby blocking the residual silanol groups through silylation application_number US 75775391 A description according to the process of the invention an organopolysiloxane is first prepared by adding an alkali catalyst to an organocyclopolysiloxane and heating the reaction system to effect equilibration reaction the starting reactant is an organocyclopolysiloxane which may be represented by the general formula 2 str2 in formula 2 r 39 groups are independently selected from a hydrogen atom and a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms preferably 1 to 8 carbon atoms for example alkyl groups such as methyl ethyl propyl and butyl groups alkenyl groups such as vinyl allyl and butenyl groups aryl groups such as phenyl and tolyl groups aralkyl groups such as benzyl and 2 phenylethyl groups and substituted hydrocarbon groups in which some or all of the hydrogen atoms attached to carbon atoms of these groups are replaced by halogen atoms cyano groups or the like such as chloromethyl chloropropyl 3 3 3 trifluoropropyl and 2 cyanoethyl groups letter n is an integer of from 3 to 10 preferably equal to 3 or 4 a polymerization chain stopper such as hexamethyldisiloxane and tetramethyldivinyldisiloxane may be added.