Patent ID: 9413011
Filing Date: 2016-08-09
CPC Classification: C08F,H01M,Y02E

Claim Text:
1. A binder for secondary battery electrodes comprising a polymer obtained by polymerizing three or more kinds of monomers with a reactive emulsifying agent, wherein the three or more kinds of monomers are a mixture of: a (meth) acrylic acid ester monomer (a); at least one monomer selected from the group consisting of an acrylate monomer, a vinyl monomer and a nitrile monomer (b); and an unsaturated monocarbonic acid monomer (c), wherein the (meth)acrylic acid ester monomer is at least one monomer selected from the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, isobutyl acrylate, n-amyl acrylate, isoamyl acrylate, n-ethyl hexyl acrylate, 2-ethyl hexyl acrylate, 2-hydroxy ethyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-amyl methacrylate, isoamyl methacrylate, n-hexyl methacrylate, n-ethyl hexyl methacrylate, 2-ethyl hexyl methacrylate, hydroxyethyl methacrylate and hydroxypropyl methacrylate, wherein the acrylate monomer is selected from the group consisting of methacryloxy ethylethylene urea, β-carboxy ethylacrylate, dipropylene diacrylate, ditrimethylolpropane tetraacrylate, dipentaerythritol hexaacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, lauryl acrylate, cetyl acrylate, stearyl acrylate, lauryl methacrylate, cetyl methacrylate and stearyl methacrylate, wherein the reactive emulsifying agent contains a carbon-carbon double bond at one side thereof and contains at least one selected from the group consisting of a cationic emulsifying agent, an anionic emulsifying agent, an amphoteric emulsifying agent, and a non-ionic emulsifying agent group at the other side thereof, wherein the anionic emulsifying agent group is selected from the group consisting of sulfate, phosphate, and sulfosuccinate, wherein the binder further comprises a non-reactive emulsifying agent, in addition to the reactive emulsifying agent, and wherein the non-reactive emulsifying agent is present in an amount of 100% or less, with respect to the weight of the reactive emulsifying agent.