公开(公告)号：US20210147632A1

公开(公告)日：2021-05-20

申请号：US17158149

申请日：2021-01-26

申请人： Henkel AG & Co. KGaA

发明人： Christina Despotopoulou ,  Johann Klein ,  Therese Hemery ,  Esteban Mejia ,  Udo Kragl ,  Theresia Koehler ,  Lea Grefe

IPC分类号： C08G77/06 ,  C08G77/16 ,  C08G77/12 ,  C08G77/20 ,  C08G77/00 ,  C08K5/23 ,  C08K5/3445 ,  C08K5/18 ,  C08K5/05 ,  C08K5/315

摘要： The invention relates to a process for preparing polyorganosiloxanes by (i) condensation polymerization of at least one linear organosiloxane which has at least one hydroxy group or hydrolysable group bound to a silicon atom, (ii) ring-opening polymerization of at least one cyclosiloxane, or (iii) ring-opening polymerization and condensation polymerization of a mixture of at least one linear organosiloxane which has at least one hydroxy group or hydrolysable group bound to a silicon atom and at least one cyclosiloxane with a basic initiator and a hydroxy group-containing compound in the presence of a polar aprotic solvent, wherein the obtained polyorganosiloxanes are not miscible in the polar aprotic solvent at room temperature.

公开(公告)号：US12060459B2

公开(公告)日：2024-08-13

申请号：US17158149

申请日：2021-01-26

申请人： Henkel AG & Co. KGaA

发明人： Christina Despotopoulou ,  Johann Klein ,  Therese Hemery ,  Esteban Mejia ,  Udo Kragl ,  Theresia Koehler ,  Lea Grefe

IPC分类号： C08G77/08 ,  C08G77/00 ,  C08G77/06 ,  C08G77/12 ,  C08G77/16 ,  C08G77/20 ,  C08K5/05 ,  C08K5/18 ,  C08K5/23

CPC分类号： C08G77/08 ,  C08G77/06 ,  C08G77/12 ,  C08G77/16 ,  C08G77/20 ,  C08G77/70 ,  C08G77/80 ,  C08K5/05 ,  C08K5/18 ,  C08K5/23 ,  C08G2170/00

摘要： The invention relates to a process for preparing polyorganosiloxanes by (i) condensation polymerization of at least one linear organosiloxane which has at least one hydroxy group or hydrolysable group bound to a silicon atom, (ii) ring-opening polymerization of at least one cyclosiloxane, or (iii) ring-opening polymerization and condensation polymerization of a mixture of at least one linear organosiloxane which has at least one hydroxy group or hydrolysable group bound to a silicon atom and at least one cyclosiloxane with a basic initiator and a hydroxy group-containing compound in the presence of a polar aprotic solvent, wherein the obtained polyorganosiloxanes are not miscible in the polar aprotic solvent at room temperature.