Patent ID: 8722763

Claim:
A process for producing a polymer composition comprising the steps of a) providing a masterbatch (MB) which comprises at least one water tree retardant (WTR) additive and a carrier polymer, and b) blending the masterbatch obtained from step a) with at least one LDPE polymer (A) produced in a high pressure process, to obtain said polymer composition; wherein the carrier polymer and the LDPE polymer (A) are different, and wherein the masterbatch (MB) comprises: one or more WTR additive(s), wherein the total amount of the one or more WTR additive(s) is of less than 50 wt %, based on the total amount (wt %) of the MB and a carrier polymer in an amount of at least 50 wt % based on the total amount of the MB wherein the carrier polymer is a polar polyethylene.