The invention discloses a method for providing a crosslinked composition, comprising the following steps: (a) providing an ethylene-α-olefin plastomer having a density of 850 kg/m³ to 900 kg/m³ and a melt flow rate (ISO 1133, 2.16 kg, 190℃) of 0.3 to 50 g/10 min; (b) grafting the ethylene-α-olefin plastomer with a silane crosslinking agent such that the content of silane crosslinking agent ranges from 0.1 to 10.0 wt% relative to the grafted ethylene-α-olefin plastomer; (c) contacting the grafted ethylene-α-olefin plastomer with a tin-free silane crosslinking catalyst at 23℃ and 50% relative humidity for at least 15 minutes to form a crosslinked composition, wherein the tin-free silane crosslinking catalyst is present in an amount of 2 to 8 wt% relative to the resulting mixture of grafted ethylene-α-olefin plastomer and tin-free silane crosslinking catalyst, the tin-free catalyst comprising a Brønsted acid, and the gel content of the crosslinked composition after 15 minutes is at least 60%.

Area Code: AT

Application Number: CN201980059458.5