Patent ID: 6448361
Filing Date: 2002-09-10
Classification: B01J,C08G

Abstract:
A product made by a process comprising:(a) continuously feeding hydrogen siloxane, one or more olefinically substituted block or random polyoxyalkylene corresponding to the formula R1(OCH2CH2)v(OCH2CHR3)wâ€”OR2 wherein R1 denotes an alkenyl group containing 3 to 10 carbon atoms; each R3 is independently methyl or ethyl; R2 denotes a monovalent organic group; v has a value of 0 to 200; and w has a value of 0 to 200, provided that the sum of (v+w) is greater than 0, capable of reacting with said hydrogen siloxane, and a catalyst for said reaction, to a first in a series of at least one continuously stirred tanked reactor (CSTR), and continuously withdrawing from the last CSTR in said series a crude product stream that contains siloxane copolymer and unreacted hydrogen siloxane moieties and olefinically substituted block or random polyoxyalkylene; and (b) continuously feeding the product stream of step (a) to at least one plug flow reactor wherein a product stream is withdrawn continuously, wherein said reactions of steps (a) and (b) are catalyzed by a noble metal catalyst.