Patent ID: 11879037
Assignee: HENKEL AG & CO. KGAA
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 10:
11. A method for producing a hydroxyl-functionalized polysiloxane polyalkyleneglycol brush copolymer, wherein the polysiloxane backbone A contains less than 500 ppm mol % of SiH moiety based on the total moles of the silicon atom which constitutes the polysiloxane backbone, and said copolymer has a polydispersity index of from 1.3 to 5.0, comprising the steps of:
a) reacting a compound conforming to formula IV with a polyhydridosiloxane under anhydrous conditions and under catalysis of a transition metal catalyst of which the transition metal is selected from Groups 8 to 10 of the Periodic Table to provide a hydroxyl-functionalized polysiloxane prepolymer having Formula (II),, wherein:
Z is a covalent bond or selected from a polyoxyalkylene having a molecular weight of less than 10000 g/mol or a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom,
R1, R2, R3, R4 and R5 may be the same or different and are independently selected from a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom,
R12 is selected from a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom,
R7 is selected from a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom,
n1 and n2 is an integer independently selected from 0 to 1000, with the proviso that not both of n1 and n2 are 0,
n3 is an integer from 0 to 10, and
p is an integer from 0 to 1000,

said compound conforming to Formula (IV), and, wherein Z, R12 and R7 are as defined above,

said polyhydridosiloxane conforms to Formula (V), wherein:
R1, R2, R3, R4, R5 and pare as defined above; and
n is n1+n2+n3, and

b) in the presence of the obtained hydroxyl-functionalized polysiloxane prepolymer of Formula (II) and a catalyst, performing a ring-opening polymerization of at least one alkylene oxide monomer having Formula (III):, wherein:
each R8, R9, R10 and R11 may be the same or different and are independently selected from hydrogen or a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom.