The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2016
Filed:
Dec. 09, 2008
Virginie Boucher, Villeneuve d'ascq, FR;
Alexandra Roos, Charenton-le-Pont, FR;
Sophie Duquesne, Villeneuve d'Ascq, FR;
Serge Bourbigot, Villeneuve d'Ascq, FR;
Laure Meynie, Paris, FR;
Karine Cavalier, Arles, FR;
Didier SY, Salin de Giraud, FR;
Marc Lacroix, Louvain-la-Neuve, BE;
Virginie Boucher, Villeneuve d'ascq, FR;
Alexandra Roos, Charenton-le-Pont, FR;
Sophie Duquesne, Villeneuve d'Ascq, FR;
Serge Bourbigot, Villeneuve d'Ascq, FR;
Laure Meynie, Paris, FR;
Karine Cavalier, Arles, FR;
Didier Sy, Salin de Giraud, FR;
Marc Lacroix, Louvain-la-Neuve, BE;
ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE), Salin-de-Giraud, FR;
RENAULT S.A.S.; SOLVAY SA, Boulogne Billancourt, BE;
Abstract
A method of preparing a transparent polymer material includes mixing mineral nanoparticles selected from nanoparticles of alkaline-earth metal carbonates, alkaline-earth metal sulfates, metallic oxides, oxides of metalloids, and siloxanes, and a composition A including at least one thermoplastic polymer in the molten state selected from polycarbonate (PC), polystyrene (PS) and polymethyl methacrylate (PMMA) in order to obtain a master-batch, the mixture of step i) including at least 25% and at most 75% by weight of the mineral nanoparticles. The master-batch obtained in step i) is mixed with a composition B of a thermoplastic polycarbonate matrix (PCm) in the molten state, to obtain a transparent polymer material including at most 10% by weight of the mineral nanoparticles, preferably at most 5% by weight of the mineral nanoparticles.