Crosslinkable polymer composition, crosslinked polymer material, metal member, and wiring harness

A crosslinkable polymer composition comprising an ingredient A selected from the group consisting of calcium acetylacetonate, calcium isopropixide, zinc acetylacetonate, zinc isopropixide, titanium acetylacetonate, titanium isopropixide, aluminum acetylacetonate, and aluminum triisopropoxide, an ingredient B selected from the group consisting of maleic anhydride-modified liquid polybutadienes, carboxyl group-introduced liquid polyacrylates, and carboxyl-modified silicone oils, and an ingredient C selected from the group consisting of one or more acidic phosphate esters represented by the general formulas (C1) and (C2) below,

• P(═O)(—OR)(—OH)2 (C1)
• P(═O)(—OR)2(—OH) (C2)
• wherein, assuming that the metal ion released from component A has a valence of +y and a content of the metal ion is m mol, the substituent contained in component B has a valence of −z and a content of the substituent is n mol, the acidic phosphate constituting component C has a valence of −x and a content of the acidic phosphate esters is 1 mol,
• g≥0.1 holds for g=(m·y−l·x)/(n·z),
• where R is a hydrocarbon group with a carbon number of 4 to 30.