Composite particles, binder composition for nonaqueous secondary batteries and nonaqueous secondary battery electrode

2:

• The composite particle according to claim 1, wherein at least a portion of the polyrotaxane is present within a particle structure consisting of chain molecules of the copolymer.

3:

• The composite particle according to claim 1, wherein at least one of the cyclic skeletons in the cyclic molecule is a crown ether skeleton, a cyclic siloxane skeleton, or a cyclic oligosaccharide skeleton.

4:

• The composite particle according to claim 1, wherein at least one of the cyclic skeletons in the cyclic molecule is an α-cyclodextrin skeleton.

5:

• The composite particle according to claim 1, wherein at least one of the stopper groups is a dinitrophenyl group, an adamantyl group, a trityl group, or a derivative group of any of these groups.

6:

• The composite particle according to claim 1, wherein at least one of the stopper groups is an adamantyl group.

7:

• The composite particle according to claim 1, wherein the chain molecule is at least one selected from the group consisting of polyethylene glycol, polypropylene glycol, polyisoprene, polyisobutylene, polybutadiene, polytetrahydrofuran, polyacrylic acid ester, polydimethylsiloxane, polyethylene, and polypropylene.

8:

• The composite particle according to claim 1, wherein at least one of the chain molecules is polyethylene glycol.

9:

• The composite particle according to claim 1, wherein the chain molecule has a weight average molecular weight of 5,000 to 50,000.

10:

• The composite particle according to claim 1, wherein a content of the polyrotaxane relative to 100 parts by mass of the copolymer is 0.10 parts by mass or more and 50 parts by mass or less.

11:

• The composite particle according to claim 1, wherein a content of the second structural unit in all structural units of the copolymer is 0.10% by mass or more and 20% by mass or less.

12:

• The composite particle according to claim 1, wherein the copolymer comprises a third structural unit derived from a monomer (a3), and the monomer (a3) is a compound having a plurality of independent ethylenically unsaturated bonds.

13:

• The composite particle according to claim 12, wherein a content of the third structural unit in all structural units of the copolymer is 0.010% by mass or more and 10% by mass or less.

14:

• The composite particle according to claim 1, which is used as a binder for a non-aqueous secondary battery.

15:

• A binder composition for a non-aqueous secondary battery, comprising the composite particle according to claim 1 and an aqueous medium.

16:

• The binder composition for a nonaqueous secondary battery according to claim 15, wherein an average particle diameter d50 of the composite particles is 0.18 μm or more and 1.0 μm or less.

17:

• A slurry for a non-aqueous secondary battery electrode comprising the composite particles according to claim 1, an electrode active material, and an aqueous medium.

18:

• A non-aqueous secondary battery electrode comprising the composite particle according to claim 1.

19:

• A non-aqueous secondary battery comprising the non-aqueous secondary battery electrode according to claim 18.