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US 2018/0258278 A1Published application
Low Emission, Wear Resistant Polyoxymethylene Composition
AssigneeCelanese Sales Germany GmbH
InventorsQamer Zia, Kirsten Markgraf, Ursula Ziegler
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Abstract
A tribologically modified polyoxymethylene polymer composition is disclosed. In accordance with the present disclosure, the polyoxymethylene polymer composition contains a tribological modifier, such as polytetrafluoroethylene, in combination with a stabilizer package. The stabilizer package can include a guanamine compound in combination with at least one carboxylic acid salt. The stabilizer package minimizes formaldehyde emission.
Claims19
A polymer composition comprising:
- a polyoxymethylene polymer present in the composition in an amount of at least about 50% by weight;
- at least one tribological additive comprising a polytetrafluoroethylene polymer, the polytetrafluoroethylene polymer being present in the composition in an amount from about 5% to about 30% by weight;
- a benzoguanamine;
- a carboxylic acid salt;
- and
- wherein the polymer composition emits less than about 80 ppm of formaldehyde when tested according to Test VDA 275 after 24 hours using a plaque having a width of 2 mm.
3 more elements
Dependencies are inferred from the claim text.