Patent ID: 6258968
Filing Date: 2001-07-10
Classification: C08G

Abstract:
Process for the production of organofunctional polydiorganosiloxanes of the formula (I)[R.sub.2 (XR'O)SiO.sub.1/2 ].sub.a [R.sub.2 SiO.sub.2/2 ].sub.b [R.sub.3 SiO.sub.1/2 ].sub.2-awhere0<a.ltoreq.2,b=0-500, and with the proviso that where b=0, a is 2 in the total,X.dbd.--OH, --COOH, --NR"".sub.2, --CR"".dbd.CR"".sub.2,R.dbd.C.sub.1 -C.sub.18 alkyl, C.sub.6 -C.sub.14 aryl and R'.dbd.C.sub.2 -C.sub.18 alkylene, oxyalkylene, C.sub.6 -C.sub.14 arylene and R"".dbd.H and/or C.sub.1 -C.sub.18 alkyl, wherein the [R.sub.2 SiO.sub.2/2 ] units are optionally attached together via O--R'--O linkages,wherein at least one cyclic dialkylsiloxane is reacted with at least one compound of the type HO--R'--X in the presence of at least one equilibration catalyst, optionally in the presence of linear trialkylsiloxy-terminated siloxanes, where alkyl=C.sub.1 -C.sub.18 alkyl, and optionally in a hydrophobic solventat temperatures of between 80 and 220.degree. C.