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1. (WO2012121997) POLYTHIOURETHAN BASED COMPOSITE ARTICLES
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2012/121997    International Application No.:    PCT/US2012/027389
Publication Date: 13.09.2012 International Filing Date: 02.03.2012
IPC:
G02B 1/04 (2006.01)
Applicants: PPG INDUSTRIES OHIO, INC. [US/US]; 3800 West 143rd Street Cleveland, Ohio 44111 (US) (For All Designated States Except US)
Inventors: RETSCH, William H.; (US)
Agent: ALTMAN, Deborah M.; PPG Industries, Inc. Law Department - Intellectual Property One PPG Place 39th Floor Pittsburgh, Pennsylvania 15272-0001 (US)
Priority Data:
61/449,339 04.03.2011 US
Title (EN) POLYTHIOURETHAN BASED COMPOSITE ARTICLES
(FR) ARTICLES COMPOSITES À BASE DE POLYTHIOURÉTHANE
Abstract: front page image
(EN)Provided is a composite optical article including (a) a polymeric base layer comprising a sulfur-containing urethane-based material having a refractive index of at least 1.57; and (b) a polymeric outer layer cast over a surface of the base layer (a) comprising (i) a poly(urea-urethane) material having a refractive index of less than 1.57, and (ii) a photochromic compound and/or a static dye. The thickness of the base layer (a) is greater than the thickness of the outer layer (b).
(FR)La présente invention concerne un article optique composite comportant (a) une couche de base polymère comprenant un matériau à base d'uréthane contenant du soufre ayant un indice de réfraction supérieur ou égal à 1,57 ; et (b) une couche polymère externe coulée sur une surface de la couche de base (a) et comprenant (i) un matériau en poly(urée-uréthane) ayant un indice de réfraction inférieur à 1,57, et (ii) un composé photochrome et/ou un colorant statique. L'épaisseur de la couche de base (a) est supérieure à l'épaisseur de la couche externe (b).
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)