Composition, laminate, packaging material, battery case packaging material, and battery

1. A composition comprising:

a modified olefin polymer (A) that is a modified olefin polymer, the modified olefin polymer being a polymer (a) of a C 2 to C 2 α-olefin modified by a monomer (b) having a functional group reactive with an epoxy group or an oxazoline group;

a crosslinking agent (B) comprising at least one of an epoxy compound and an oxazoline compound; and

a catalyst (C) having a pKa of 11 or more, the modified olefin polymer (A) satisfying the following requirements (i) and (ii):

Requirement (i): the polymer (a) comprises a structural unit derived from a C 4 to C 20 α-olefin, and

Requirement (ii): a heat of fusion of the modified olefin polymer (A), as measured according to JIS K7122, is 0 to 50 J/g.

2. The composition according to claim 1 , comprising a hydrocarbon synthetic oil (D) having a kinematic viscosity at 40° C. of 30 to 500,000 cSt.

3. The composition according to claim 1 , wherein the polymer (a) comprises a structural unit derived from propylene.

4. The composition according to claim 3 , wherein a content of the structural unit derived from propylene is 40 to 95 mol % with respect to 100 mol % of a structural unit derived from a C 2 to C 20 α-olefin.

5. The composition according to claim 3 , wherein in the polymer (a), all structural units other than the structural unit derived from propylene are structural units derived from a C 4 to C 20 α-olefin.

6. The composition according to claim 1 , wherein the C 4 to C 20 α-olefin comprises 1-butene.

7. The composition according to claim 1 , wherein a content of a structural unit derived from the monomer (b) is 0.1 to 15 mass % with respect to 100 mass % of the modified olefin polymer (A).

8. The composition according to claim 1 , wherein the functional group is a carboxyl group or an acid anhydride group.

9. The composition according to claim 1 , wherein the crosslinking agent (B) is at least one selected from a bisphenol A liquid epoxy resin, an alicyclic epoxy compound, and a trimethylolpropane polyglycidyl ether.

10. A laminate comprising a substrate and an adhesive layer composed of a cured product of the composition according to claim 1 .

11. A packaging material comprising a laminate comprising an internal layer, an adhesive layer, and a substrate in this order,

the adhesive layer being a layer composed of a cured product of the composition according to claim 1 .

12. A battery case packaging material, comprising a laminate comprising an internal layer, an inner adhesive layer, a substrate, an outer adhesive layer, and an external layer in this order,

the inner adhesive layer being a layer composed of a cured product of the composition according to claim 1 .

13. A battery comprising the battery case packaging material according to claim 12 and an electrolyte solution packaged by the battery case packaging material, the internal layer of the battery case packaging material being at least partly in contact with the electrolyte solution.

14. A composition comprising:

a modified olefin polymer (A) that is a modified olefin polymer resulting from modification of a polymer (a) of a C 2 to C 20 α-olefin by a monomer (b1) having a functional group reactive with an epoxy group; and

at least one crosslinking agent (B1) selected from a bisphenol A liquid epoxy resin, an alicyclic epoxy compound, and a trimethylolpropane polyglycidyl ether,

the modified olefin polymer (A) satisfying the following requirements (i) and (ii):

Requirement (i): the polymer (a) comprises a structural unit derived from a C 4 to C 20 α-olefin, and

Requirement (ii): a heat of fusion of the polymer (A), as measured according to JIS K7122, is 0 to 50 J/g.

15. The composition according to claim 14 , comprising a hydrocarbon synthetic oil (D) having a kinematic viscosity at 40° C. of 30 to 500,000 cSt.

16. A laminate comprising a substrate and an adhesive layer composed of a cured product of the composition according to claim 14 .