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|1. (WO2018180812) METHOD FOR MANUFACTURING CROSSLINKED POLYMER OR SALT THEREOF|
|Applicants:||TOAGOSEI CO., LTD.
|Title:||METHOD FOR MANUFACTURING CROSSLINKED POLYMER OR SALT THEREOF|
The present specification provides a method for manufacturing a crosslinked polymer having a carboxyl group, used in a binder for a non-aqueous electrolyte secondary cell electrode, or a salt thereof. The method for manufacturing a crosslinked polymer or a salt thereof is provided with: a polymerization step for performing precipitation polymerization of a monomer component containing 50-100 mass% of structural units derived from an ethylenically unsaturated carboxylic acid monomer in relation to all structural units; and one or more cleaning steps after the polymerization step. As a result of the cleaning step, the total amount of the ethylenically unsaturated carboxylic acid monomer and salts thereof in terms of unneutralized form in relation to the total amount of the crosslinked polymer and salts thereof is 5.0 mass% or below.