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1. (WO2019043577) CAST-MOLDING PROCESS FOR PRODUCING CONTACT LENSES
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Pub. No.: WO/2019/043577 International Application No.: PCT/IB2018/056556
Publication Date: 07.03.2019 International Filing Date: 28.08.2018
IPC:
B29D 11/00 (2006.01) ,G02B 1/04 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
D
PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
11
Producing optical elements, e.g. lenses or prisms
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
1
Optical elements characterised by the material of which they are made; Optical coatings for optical elements
04
made of organic materials, e.g. plastics
Applicants:
NOVARTIS AG [CH/CH]; Lichtstrasse 35 4056 Basel, CH
Inventors:
HOLLAND, Troy Vernon; US
CHANG, Frank; US
DESOUSA, Ryan; US
Priority Data:
62/551,33329.08.2017US
Title (EN) CAST-MOLDING PROCESS FOR PRODUCING CONTACT LENSES
(FR) PROCÉDÉ DE MOULAGE PAR COULÉE POUR LA PRODUCTION DE LENTILLES DE CONTACT
Abstract:
(EN) Described herein is a fast curing process for producing contact lenses. This fast curing process involves adding a chain-transfer agent, such as, a thiol-containing compound, into a lens-forming composition for making contact lenses. The curing time of such a lens-forming composition can be significantly reduced, compared to a "control composition" that is free of any chain-transfer agent. Also, the elastic modulus of the contact lenses obtained from such a lens-forming composition can be reduced.
(FR) L'invention concerne un procédé de durcissement rapide pour produire des lentilles de contact. Le procédé de durcissement rapide selon l'invention comprend l'ajout d'un agent de transfert de chaîne, tel qu'un composé contenant un thiol, dans une composition de formation de lentille pour la fabrication de lentilles de contact. Le temps de durcissement d'une telle composition de formation de lentille peut être significativement réduit, par comparaison à une « composition témoin » qui est exempte de tout agent de transfert de chaîne. De plus, le module élastique des lentilles de contact obtenues à partir d'une telle composition de formation de lentille peut être réduit.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 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 (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (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, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)