METHOD OF MANUFACTURE OF BLOCK COPOLYMERS CONTAINING POLYSILOXANE SEGMENTS AND SEGMENTS OF POLYETHER,POLYACETAL AND POLYESTER STRUCTURE BONDED TOGETHER WITH SI-O-C LINKLOKSANOVYE SEGMENTY I SEGMENTY POLIEHFIRNOJJ I POLIACETALEVOJJ STRUKTURY,SVJAZANNYE DRUG S DRUGOM SVJAZ'JU