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US 10,329,362 B2Granted
Polymer composition for a layer of a layer element
AssigneeBorealis AG
InventorsFrancis Costa, Mattias Berqvist, Stefan Hellstrom, Bert Broeders, Girish Suresh Galgali, Bernt-Ake Sultan, Tanja Piel, Bart Verheule, Jeroen Oderkerk
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Abstract
The present invention relates to a polymer composition, to a layer element, preferably to at least one layer element of a photovoltaic module, comprising the polymer composition and to an article which is preferably said at least one layer of a layer element, preferably of a layer element of a photovoltaic module.
Claims20
A polymer composition comprising:
- i) a polymer of ethylene (a) with a polar comonomer(s), wherein
- the polar comonomer is present in the polymer of ethylene (a) in an amount of 4.5 to 18 mol %, when measured by quantitative 1H NMR, and
- the polar comonomer is selected from the group of unsaturated carboxyl acid esters, and wherein
- the polymer of ethylene (a) optionally bears functional group(s) containing units other than said polar comonomer,
- ii) further comprising silane group(s) containing units (b), wherein the silane group(s) containing units (b) are a comonomer of the polymer of ethylene (a) or grafted chemically to the polymer of ethylene (a), and
- iii) additives selected from the group consisting of antioxidants, UV light stabilizers, nucleating agents, clarifiers, brighteners, acid scavengers, processing agents, and slip agents,
- wherein the polymer composition has
- difference in Refractive Index of the polymer composition within the temperature range from 10 to 70° C. is less than 0.0340, when measured in a refractometer, and
- the polymer composition does not contain any silanol condensation catalyst.
6 more elements
Dependencies are inferred from the claim text.