Polymeric composition comprising a fluorescent dye, its process of preparation, use and object comprising it
The present invention relates to a polymeric composition comprising a polymeric elastomeric phase and a fluorescent dye. In particular the present invention relates to a polymeric composition comprising a polymeric elastomeric phase and a fluorescent dye, its process of preparation and use. The present invention concerns also objects or articles comprising a polymeric composition comprising a polymeric elastomeric phase and a fluorescent dye. The present invention concerns as well a photovoltaic module comprising a polymeric composition comprising a polymeric elastomeric phase and a fluorescent dye.
1. A luminescent solar concentrator including a composition comprising:
a polymeric phase having a glass transition temperature of at least 50° C.; and
an acrylic block copolymer having a general formula (A) n B in which:
n is an integer of greater than or equal to 1,
block A includes an acrylic or methacrylic homo- or copolymer having a Tg of greater than 50° C., or polystyrene, or an acrylic/styrene or methacrylic/styrene copolymer,
wherein said block A forms a polymeric phase,
block B includes an acrylic or methacrylic homo- or copolymer having a Tg of less than 20° C.,
wherein said block B forms an elastomeric phase of macromolecular sequences having a flexible nature; and
a photo luminescent dye.
2. The luminescent solar concentrator according to claim 1 , wherein said polymeric phase includes a thermoplastic polymer P1 selected from polyethylene terephthalate (PT), a homo- or copolymer of methyl methacrylate, polycarbonate (PC), polyvinylidenefluoride (PVDF), poly (ethylene-vinyl acetate) (PEVA), or polyamide-grafted polyolefin.
3. The luminescent solar concentrator according to claim 1 , wherein said block B has a weight average molecular weight of between 10 000 g/mol and 500 000 g/mol.
4. The luminescent solar concentrator according to claim 1 , comprising from 1 ppm to 10 000 ppm of the photo luminescent dye based on the weight of the composition.
5. The luminescent solar concentrator according to claim 1 , wherein said photo luminescent dye comprises at least one heterocyclic ring.
6. The luminescent solar concentrator according to claim 1 , wherein said photo luminescent dye has a maximum of absorption at a wavelength λ abs between 300 nm and 700 nm.
7. The luminescent solar concentrator according to claim 1 , wherein said photo luminescent dye has a maximum of the emission at a wavelength λ em between 400 nm and 1000 nm.
8. The luminescent solar concentrator according to claim 1 , wherein the difference between the maximum of an emission wavelength λ em and the maximum of an absorption wavelength λ abs of said photo luminescent dye is between 5 nm and 250 nm.
9. The luminescent solar concentrator according to claim 1 , wherein said photo luminescent dye comprises at least one dye selected from: a perylene compound known by the trade-name Lumogen® from BASF; an acene compound; a benzothiadiazole compound; a compound comprising a benzoetherodiazole group and at least one benzodithiophene group; a disubstituted naphthothiadiazole compound; a benzoheterodiazole compound disubstituted with benzodithiophene groups; a disubstituted benzoheterodiazole compound; or a disubstituted diaryloxybenzoheterodiazole compound.
10. A luminescent solar concentrator including a composition comprising:
a) a polymeric phase having a glass transition temperature of at least 50° C.,
b) an elastomeric phase of macromolecular sequences having a flexible nature with a glass transition temperature of less than 20° C.,
wherein said elastomeric phase and said polymeric phase are part of a polymer network, and
c) a photo luminescent dye.
11. The luminescent solar concentrator according to claim 10 , wherein said elastomeric phase represents between 1 wt % and 30 wt % of the polymer network.
12. The luminescent solar concentrator according to claim 10 wherein said elastomeric phase is a thermoplastic acrylic sequence containing at least 50% of alkyl(meth)acrylate monomers.
13. The luminescent solar concentrator according to claim 12 wherein said alkyl(meth)acrylate monomers are selected from methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, styrene or butyl methacrylate, or mixtures thereof.
14. A photovoltaic module including a composition comprising:
a) a polymeric phase having a glass transition temperature of at least 50° C.,
b) an elastomeric phase of macromolecular sequences having a flexible nature with a glass transition temperature of less than 20° C.,
wherein said elastomeric phase and said polymeric phase are part of a polymer network, and
c) a photo luminescent dye.