Recyclable bumper system
AssigneeBASF SE
InventorsErhard Seiler, Klaus-Dieter Ruempler, Norbert Jung, Udo Haardt, Rainer Henning, Juergen Hamprecht
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Abstract
A recyclable bumper system based on polypropylene comprises a bumper support A of glass fiber reinforced polypropylene, an energy-absorbing foam core B of foamed polypropylene and a tough shell C of EP-rubber modified polypropylene which may be coated, and can be recycled by mechanical comminution, extrusion and granulation, resulting in granules from which injection moldings having good mechanical properties can be produced.
Claims3
A recyclable bumper system based on polypropylene, comprising a bumper support A, an energy-absorbing foam core B and a tough, deformable bumper shell C which may be coated with a coating D, formed from
- A. 70-30% by weight of a glass fiber reinforced propylene polymer containing at least some unidirectionally oriented continuous fibers, the glass fiber content being not less than 30% by weight, based on A,
- B. 2-15% by weight of a propylene polymer foam having a density of from 30 to 150 g/l
- C. 28-73% by weight of a propylene polymer containing from 25 to 65% by weight, based on C, of an ethylene/propylene rubber, with or without
- D. 0.05-4% by weight of a conventional automotive coating.
Dependencies are inferred from the claim text.