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

Claim 0:
1. A polyether siloxane block copolymer producing polyurethane, foams, the polyether siloxane block copolymer comprising a polyether siloxane block copolymer obtained by reacting
a) at least one alpha-omega hydrogen siloxane of formula (1), wherein
k=1 to 100, and
wherein the radicals R′ are each independently identical or different monovalent aliphatic or aromatic hydrocarbon radicals having 1 to 20 carbon atoms,
b) and at least one higher-order hydrogen siloxane of formula (2), wherein
l=1 to 10,
m=0 to 100,
n=0 to 100, and
wherein the radicals R2 are each independently identical or different monovalent aliphatic or aromatic hydrocarbon radicals having 1 to 20 carbon atoms, and
wherein the radicals R3 are each independently identical or different monovalent aliphatic or aromatic hydrocarbon radicals having 1 to 20 carbon atoms, and
wherein the radicals R4 are each independently identical or different monovalent aliphatic or aromatic hydrocarbon radicals having 1 to 20 carbon atoms, or are H,
wherein at least three R4 radicals are hydrogen atoms,
c) with at least one polyether of formula (3), wherein
g=0 to 100,
h=0 to 100,
i=0 to 100, and
wherein the radicals R5 are each independently identical or different monovalent aliphatic saturated or unsaturated hydrocarbon radicals having 1 to 20 carbon atoms or are H, and wherein the radicals R6 are each independently identical or different monovalent aliphatic or aromatic hydrocarbon radicals having 1 to 20 carbon atoms,

in the presence of a hydrosilylation catalyst (d), wherein the reaction is carried out optionally in a solvent (e).