A crosslinked copolymer is provided, which includes a copolymer crosslinked by a crosslinking agent. The copolymer is copolymerized of (a) styrene-based monomer, (b) monomer having conjugated double bonds or acrylate ester monomer, and (c) ammonium-containing heterocyclic monomer. The crosslinking agent is (d) ##STR00001##
or the product of the reaction between ##STR00002##
and (e) ##STR00003##
or a combination thereof. Z is ##STR00004##
wherein each R.sup.1 is independently H or C.sub.1-4 alkyl group, each R.sup.2 is independently H or C.sub.1-4 alkyl group, R.sup.3 is single bond, —O—, —S—, —CH.sub.2—, or —NH—. n is a positive integer. x is 1 to 12, y is 1 to 5, and z is 1 to 5.

The present specification relates to a (meth)acrylate compound, and a copolymer and a homopolymer including a repeating unit derived therefrom.

The present specification relates to a (meth)acrylate compound, and a copolymer and a homopolymer including a repeating unit derived therefrom.

The present invention relates to a binder for a lithium-sulfur secondary battery cathode, and a composition containing the same. The binder of the present application enables a cathode active material electrolyte to have excellent resistance.

The present invention relates to a binder for a lithium-sulfur secondary battery cathode, and a composition containing the same. The binder of the present application enables a cathode active material electrolyte to have excellent resistance.

The present specification relates to a (meth)acrylate compound, and a copolymer and a homopolymer including a repeating unit derived therefrom.

The present specification relates to a (meth)acrylate compound, and a copolymer and a homopolymer including a repeating unit derived therefrom.

An aspect of the present invention provides a monomer from which a polymer layer capable of keeping high display quality even in high temperature and high humidity environments can be formed. The monomer in an aspect of the present invention is a compound represented by P-Sp.sup.1-Z.sup.2-A.sup.1-(Z.sup.1-A.sup.2).sub.n1-Z.sup.3-Sp.sup.2-P: in the formula, P denotes the same or different radical polymerizable group; and at least one of Z.sup.1, Z.sup.2, and Z.sup.3 denotes NRCO or CONR group.

An aspect of the present invention provides a monomer from which a polymer layer capable of keeping high display quality even in high temperature and high humidity environments can be formed. The monomer in an aspect of the present invention is a compound represented by P-Sp.sup.1-Z.sup.2-A.sup.1-(Z.sup.1-A.sup.2).sub.n1-Z.sup.3-Sp.sup.2-P: in the formula, P denotes the same or different radical polymerizable group; and at least one of Z.sup.1, Z.sup.2, and Z.sup.3 denotes NRCO or CONR group.

The present invention relates to a binder for a lithium-sulfur secondary battery cathode, and a composition containing the same. The binder of the present application enables a cathode active material electrolyte to have excellent resistance.