Shaped artificial polymer articles
AssigneeBASF SE
InventorsGerard Finnegan, Thomas Thompson, Juan Capote, Rupa Darji
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Abstract
Use of porous metal oxide microspheres as light stabilizers for shaped artificial polymer articles, wherein the porous metal oxide microspheres are prepared via a process comprising forming a liquid dispersion of polymer nanoparticles and a metal oxide; forming liquid droplets of the dispersion; drying the droplets to provide polymer template microspheres comprising polymer nanospheres; and removing the polymer nanospheres from the template microspheres to provide the porous metal oxide microspheres.
Claims16
A method of preparing a composition comprising incorporating porous metal oxide microspheres into a shaped artificial polymer article as a light stabilizer, wherein
- the polymer is a synthetic polymer and/or a natural or synthetic elastomer and
- the porous metal oxide microspheres comprise a metal oxide and are prepared by a method comprising
- forming a liquid dispersion of polymer nanoparticles and a metal oxide;
- forming liquid droplets of the dispersion;
- drying the liquid droplets to provide polymer template microspheres comprising polymer nanospheres and metal oxide;
- and
- removing the polymer nanospheres from the template microspheres to provide the porous metal oxide microspheres, and
- wherein the microspheres have
- an average diameter of from 0.5 μm to 100 μm,
- an average porosity of from 0.10 to 0.80 and
- an average pore diameter of from 50 nm to 999 nm.
Dependencies are inferred from the claim text.