Transparent polymer articles of low thickness
AssigneeCiba Specialty Chemicals Corporation
InventorsDavid Leppard, Francois Gugumus, Michela Bonora
Life of this patent
Estimating the term…
Abstract
The novel transparent polyolefin, polyester or polyamide article disclosed is stabilized against the effects of light, oxygen, heat and agressive chemicals by addition of 0.005-0.30% by weight the polymeric substrate of a hydroxyphenyl triazine UV absorber, and is characterized by its thickness between 1 and 500 μm. Preferred polyolefin articles thus stabilized are agricultural films containing as further stabilizer a sterically hindered amine. The novel compositions act as selective UV filter especially useful in agriculture.
Claims17
Transparent polyolefin, polyester or polyamide article having a thickness between 1 and 200 μm, which is stabilized against the effects of light, oxygen, heat and/or aggressive chemicals by addition of 0.005-0.30% by weight, based on the polyolefin, polyester or polyamide, of a hydroxyphenyl triazine UV absorber and containing a sterically hindered amine as further stabilizer.
12-16. (canceled)
Dependencies are inferred from the claim text.