Patent ID: 11952466
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC C  H

Claim 6:
7. A method for preparing a binder compound of formula (I),, wherein
R1, R2, and R3 each independently represents an unsubstituted or substituted linear or branched alkyl with 1-6 carbon atoms, or an unsubstituted or substituted aryl with 6-20 carbon atoms;
R4 represents —COOM,
R5 represents a bridging oxo or bridging imino;
each M independently represents one of Li, Na, K, Rb, and Cs;
Z represents a linear or branched alkylene with 1-6 carbon atoms;
m is an integer selected from 7,600 to 47,000;
n is an integer selected from 1,520 to 94,000; and
m/n=0.1-10;
the method comprising following steps:
(i) allowing a polymerization reaction of a vinylidene fluoride monomer in the presence of a chain transfer agent of formula (II) to obtain a polymer of formula (III):, wherein R1, R3, Z, and m are defined as above respectively; and
optionally, the chain transfer agent of formula (II) is 4-cyano-4-thioylthiopropylsulfanyl pentanoic acid;
(ii) allowing a polymerization reaction between a glucose acrylic acid derivative of formula (IV) and polyvinylidene fluoride of formula (III) to obtain a polymer of formula (I′):, wherein R1, R2, R3, Z, m, n, and m/n are as defined above respectively,
R5 represents a bridging oxo or bridging imino, and
R6 represents acetyl;
and (iii) reacting the polymer obtained in the step (ii) with an alkali metal alkoxide R7OM to obtain the binder compound of formula (I):, wherein R7 is selected from a linear or branched alkyl with 1-6 carbon atoms.