Patent ID: 11965064
Assignee: EVONIK OPERATIONS GMBH
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 5:
6. The polyether siloxane block copolymer according to claim 1, wherein alpha-omega hydrogen siloxane and higher-order hydrogen siloxane are not provided separately but a siloxane composition comprising alpha-omega hydrogen siloxane and higher-order hydrogen siloxane is provided directly by equilibration, which corresponds to formula (4),, , wherein
o=0.01 to 0.7,
p=0 to 100,
wherein the radicals R7 are each independently identical or different monovalent aliphatic or aromatic hydrocarbon radicals having 1 to 20 carbon atoms, and
wherein the radicals R8 are each independently identical or different monovalent aliphatic or aromatic hydrocarbon radicals having 1 to 20 carbon atoms, and
wherein the radicals R9 are each independently identical or different monovalent aliphatic or aromatic hydrocarbon radicals having 1 to 20 carbon atoms, or are H,
wherein at least 50% of the R9 radicals are hydrogen atoms,
and which is then reacted directly with a polyether of formula (3).