公开(公告)号：US20250011575A1

公开(公告)日：2025-01-09

申请号：US18707331

申请日：2022-09-15

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Karel WILSENS ,  Rajesh CHITTA ,  Luke HERINX ,  Kankan BHAUMIK

IPC: C08K5/526 ,  C08J3/20 ,  C08K5/098 ,  C08L23/06

Abstract: a method for stabilising a material composition containing polyethylene includes: i) providing a material composition containing polyethylene; ii) determining the quantity of vinyl unsaturations in the polyethylene; iii) determining the quantity of secondary antioxidant in the material composition; iv) adding a quantity of secondary antioxidant so that the quantity of secondary antioxidant in the polyethylene is as required for a polyethylene having a quantity of vinyl unsaturations as determined under ii) to obtain a modified material composition. The method allows for obtaining a modified material composition that can be used in the production of articles via thermal shaping processes, such as extrusion or injection moulding processes, without excessive increase of long chain braches as a consequence of the shaping process.