Stabilizer combination for the rotomolding process
AssigneeCiba Specialty Chemicals Corporation
InventorsChristoph Krohnke, Urs Leo Stadler
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Abstract
A description is given of a process for the production of polyolefin hollow articles, which comprises charging the polyolefin with a stabilizer combination, comprising (A) at least one compound from the group of the organic phosphites or phosphonites, and (B) at least one compound from the group of the 3-arylbenzofuranones, filling this mixture into a mold, heating this mold in an oven to above 280.degree. C., such that the stabilised polyolefin fuses, rotating the mold around at least 2 axes, the plastic spreading to the walls, and cooling the mold while still rotating, opening it and taking the resultant hollow article out.
Claims7
A process for the production of polyolefin hollow articles, which comprises charging the polyolefin with a stabilizer combination, comprising
- A) at least one compound from the group of the organic phosphites or phosphonites, and
- B) at least one compound from the group of the 3-arylbenzofuranones, filling this mixture into a mold, heating this mold in an oven to above 280.degree. C., such that the stabilized polyolefin fuses, rotating the mold around at least 2 axes, the plastic material spreading to the walls, and cooling the mold while still rotating, opening it and taking the resultant hollow article out.
Dependencies are inferred from the claim text.