HK143193A - A mercapto compound,a high refractive index resin and lens and a process for preparing them - Google Patents

A mercapto compound,a high refractive index resin and lens and a process for preparing them

Info

Publication number
HK143193A
HK143193A HK1431/93A HK143193A HK143193A HK 143193 A HK143193 A HK 143193A HK 1431/93 A HK1431/93 A HK 1431/93A HK 143193 A HK143193 A HK 143193A HK 143193 A HK143193 A HK 143193A
Authority
HK
Hong Kong
Prior art keywords
lens
preparing
refractive index
high refractive
mercapto compound
Prior art date
Application number
HK1431/93A
Other languages
English (en)
Inventor
Yoshinobu Kanemura
Katsuyoshi Sasagawa
Masao Imai
Toshiyuki Suzuki
Original Assignee
Mitsui Toatsu Chemicals
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsui Toatsu Chemicals filed Critical Mitsui Toatsu Chemicals
Publication of HK143193A publication Critical patent/HK143193A/xx

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
    • C08G18/3855—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur
    • C08G18/3876—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur containing mercapto groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C321/00—Thiols, sulfides, hydropolysulfides or polysulfides
    • C07C321/12—Sulfides, hydropolysulfides, or polysulfides having thio groups bound to acyclic carbon atoms
    • C07C321/14—Sulfides, hydropolysulfides, or polysulfides having thio groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041—Lenses

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
HK1431/93A 1988-12-22 1993-12-30 A mercapto compound,a high refractive index resin and lens and a process for preparing them HK143193A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32192888 1988-12-22

Publications (1)

Publication Number Publication Date
HK143193A true HK143193A (en) 1994-01-07

Family

ID=18137981

Family Applications (1)

Application Number Title Priority Date Filing Date
HK1431/93A HK143193A (en) 1988-12-22 1993-12-30 A mercapto compound,a high refractive index resin and lens and a process for preparing them

Country Status (9)

Country Link
US (1) US5087758A (xx)
EP (1) EP0378895B1 (xx)
KR (1) KR920005917B1 (xx)
CN (2) CN1036390C (xx)
AU (1) AU616298B2 (xx)
BR (1) BR8904398A (xx)
CA (1) CA1322377C (xx)
DE (1) DE68907582T2 (xx)
HK (1) HK143193A (xx)

Families Citing this family (107)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU634932B1 (en) * 1991-08-08 1993-03-04 Mitsui Chemicals, Inc. Mercapto compound, its preparation process, and sulfur- containing urethane resins and lenses using the same
US5446173A (en) * 1992-03-24 1995-08-29 Daiso Co., Ltd. Cyclic sulfide compound, polymerizable compositions for optical products and optical products formed thereof
US5225472A (en) * 1992-05-19 1993-07-06 Courtaulds Aerospace, Inc. Low viscosity polythiol and method therefor
US5306799A (en) * 1992-08-26 1994-04-26 Mitsui Toatsu Chemicals, Inc. High refractive index plastic lens and composition therefor
JP2695599B2 (ja) * 1993-09-29 1997-12-24 ホーヤ株式会社 ポリウレタンレンズの製造方法
US5578658A (en) * 1993-12-20 1996-11-26 Mitsui Toatsu Chemicals, Inc. High-speed polymerizable resin composition and lenses obtained therefrom
US5608115A (en) * 1994-01-26 1997-03-04 Mitsui Toatsu Chemicals, Inc. Polythiol useful for preparing sulfur-containing urethane-based resin and process for producing the same
EP0676428B1 (en) * 1994-04-06 1999-02-03 Mitsui Chemicals, Inc. Composition for low-specific gravity urethane-base plastic lens
TW300902B (xx) * 1994-11-17 1997-03-21 Mitsui Toatsu Chemicals
US5789476A (en) * 1995-03-03 1998-08-04 Seiko Epson Corporation Film-forming coating solution and synthetic resin lens
US6274694B1 (en) 1995-11-20 2001-08-14 Hoya Corporation Process for the production of polyurethane lens
US5908876A (en) * 1996-04-19 1999-06-01 Mitsui Chemicals, Inc. Optical resin composition comprising a thiourethane prepolymer and use thereof
DE59804135D1 (de) 1997-02-05 2002-06-20 Basf Ag Feste mischungen auf der basis von sulfonylharnstoffen und adjuvantien
KR100616795B1 (ko) * 2002-04-19 2006-08-28 미쓰이 가가쿠 가부시키가이샤 티오우레탄계 광학 재료
WO2004009659A1 (ja) 2002-07-22 2004-01-29 Mitsui Chemicals, Inc. 無機超微粒子を含有する樹脂組成物
ES2290881T3 (es) * 2004-01-30 2008-02-16 Essilor International Compagnie Generale D'optique Articulos polarizados y procedimientos para obtener articulos polarizados.
FR2871806B1 (fr) * 2004-06-21 2006-11-24 Essilor Int Composition polymerisable comprenant un agent de masquage des odeurs et un parfum, lentille optique obtenue et procede de fabrication.
KR20080045215A (ko) * 2005-08-18 2008-05-22 미쓰이 가가쿠 가부시키가이샤 폴리티오우레탄계 중합성 조성물 및 그들로 이루어지는광학용 수지
CN101228203B (zh) * 2005-08-18 2012-11-28 三井化学株式会社 聚氨酯·硫氨酯类光学用树脂及其制备方法
KR20080086993A (ko) * 2006-04-19 2008-09-29 미쓰이 가가쿠 가부시키가이샤 광학재료용 (폴리)티올 화합물의 제조방법 및 그것을포함하는 중합성 조성물
EP2011785B1 (en) 2006-04-20 2013-12-18 Mitsui Chemicals, Inc. Method for producing polythiol compound for optical material
EP2214035B1 (en) * 2006-07-14 2017-08-30 Hoya Corporation Plastic lens
EP2055377A1 (en) * 2006-08-25 2009-05-06 National University Corporation Nagoya University Magnetic chemical absorber, process for producing the same, method of regenerating the same, and method of treating waste liquid
EP2842978B1 (en) 2006-10-16 2015-08-05 Mitsui Chemicals, Inc. Process for producing resin for optical material
FR2917416B1 (fr) * 2007-06-13 2012-08-10 Essilor Int Procede de traitement de la surface d'un substrat a base de polymere soufre destine a etre recouvert par un revetement
WO2009098887A1 (ja) * 2008-02-07 2009-08-13 Mitsui Chemicals, Inc. 光学材料用重合性組成物、光学材料および光学材料の製造方法
WO2010032365A1 (ja) * 2008-09-22 2010-03-25 三井化学株式会社 光学材料用重合性組成物、光学材料および光学材料の製造方法
CN101434825B (zh) * 2008-12-12 2010-05-12 河南永丽化工有限公司 一种双组分端巯基聚氨酯防霉密封胶及其制备方法
FR2943798B1 (fr) 2009-03-27 2011-05-27 Essilor Int Article d'optique revetu d'un revetement antireflet ou reflechissant comprenant une couche electriquement conductrice a base d'oxyde d'etain et procede de fabrication
WO2010148424A1 (en) 2009-06-23 2010-12-29 Carl Zeiss Vision Australia Holdings Limited Thiourethane-based lens elements and processes for their production
US9372711B2 (en) * 2009-07-20 2016-06-21 Google Technology Holdings LLC System and method for initiating a multi-environment operating system
US20120225274A1 (en) 2009-11-13 2012-09-06 Mitsui Chemicals, Inc. Film and uses thereof
DE102010031684A1 (de) 2010-07-20 2012-01-26 Bayer Materialscience Ag Polyurethane mit hoher Lichtbrechung
DE102010031683A1 (de) 2010-07-20 2012-01-26 Bayer Materialscience Ag Polyisocyanatgemische
US8895661B2 (en) * 2011-08-15 2014-11-25 Hoya Corporation Plastic lens
ITMI20112102A1 (it) 2011-11-18 2013-05-19 Acomon Ag Composizione polimerizzabile, articolo ottico ottenuto dalla stessa e metodo per la produzione di detto articolo ottico
KR101464943B1 (ko) * 2012-01-25 2014-11-25 주식회사 케이오씨솔루션 티오에폭시계 광학재료용 폴리티올화합물의 제조방법과 이를 포함하는 티오에폭시계 광학재료용 공중합체 조성물
US20150018507A1 (en) * 2012-01-25 2015-01-15 Koc Solution Co., Ltd Method for producing polythiol compound for optical materials and composition comprising same for optical materials
JP5373226B1 (ja) 2012-08-14 2013-12-18 三井化学株式会社 ポリチオール組成物、光学材料用重合性組成物およびその用途
EP3026041B1 (en) * 2012-08-14 2017-04-19 Mitsui Chemicals, Inc. Production method for polythiol compound, polymerizable composition for optical material and use therefor
CN105189592B (zh) * 2013-03-04 2018-04-10 三菱瓦斯化学株式会社 光学材料用组合物和使用其的光学材料
EP2801586B1 (de) 2013-05-07 2016-04-13 Bruno Bock Chemische Fabrik GmbH & Co. KG Gießharz auf Polythiourethanbasis mit hoher Bruchfestigkeit und niedrigem spezifischen Gewicht
TW201506083A (zh) * 2013-06-18 2015-02-16 Mitsubishi Gas Chemical Co 光學材料用組成物
CN105683160B (zh) * 2013-11-01 2018-02-16 三菱瓦斯化学株式会社 多硫醇化合物及其制造方法
TWI619707B (zh) 2013-12-11 2018-04-01 Mitsubishi Gas Chemical Co Novel thiol compound and composition for optical material using the same
US10066081B2 (en) 2013-12-13 2018-09-04 Mitsui Chemicals, Inc. Polymerizable composition for optical materials
EP3103824B1 (en) 2014-02-06 2020-03-25 Mitsui Chemicals, Inc. Polymerizable composition for optical material and optical material
WO2016006606A1 (ja) 2014-07-08 2016-01-14 三井化学株式会社 光学材料用重合性組成物およびその用途
CN106471030B (zh) 2014-07-08 2019-11-08 三井化学株式会社 光学材料用聚合性组合物及其用途
TWI699389B (zh) * 2014-07-18 2020-07-21 日商三菱瓦斯化學股份有限公司 聚硫醇組成物及其製造方法
US20190010273A1 (en) * 2014-08-29 2019-01-10 Hoya Lens Thailand Ltd. Optical resin composition, optical element obtained by curing optical resin composition, and plastic lens for eyeglasses
CN104402783B (zh) * 2014-12-15 2015-08-12 黄河三角洲京博化工研究院有限公司 一种巯基化合物的制备方法
JP6450460B2 (ja) 2015-08-06 2019-01-09 三井化学株式会社 光学材料用重合性組成物の製造方法および光学材料用重合性組成物
CN105367466A (zh) * 2015-10-21 2016-03-02 吴姣 一种巯基化合物的制备方法
EP3203271B1 (en) 2016-02-08 2021-01-27 Essilor International Blue light cutting optical material comprising a benzotriazole uv absorber
EP3236296B1 (en) 2016-04-21 2019-03-06 Essilor International Optical material comprising a red-shifted benzotriazole uv absorber
CN105777596B (zh) * 2016-04-27 2017-12-12 江苏视客新材料股份有限公司 一种聚氨酯型高折射含硫光学树脂单体及其制备方法
JP6588639B2 (ja) 2016-06-30 2019-10-09 ホヤ レンズ タイランド リミテッドＨＯＹＡ Ｌｅｎｓ Ｔｈａｉｌａｎｄ Ｌｔｄ ポリチオール化合物の製造方法、硬化性組成物の製造方法、および硬化物の製造方法
KR101885879B1 (ko) * 2016-08-30 2018-08-07 에스케이씨 주식회사 광학 재료용 폴리티올 조성물 및 이의 제조방법
EP3318920B1 (en) 2016-11-04 2022-07-06 Essilor International Near infrared light-cutting optical articles with low residual color
EP3382429A1 (en) 2017-03-28 2018-10-03 Essilor International Optical article comprising an abrasion- and/or scratch-resistant coating having a low sensitivity to cracks
EP3392680A1 (en) 2017-04-18 2018-10-24 Essilor International Optical article having an abrasion and temperature resistant interferential coating with an optimized thickness ratio of low and high refractive index layers
EP3441798A1 (en) 2017-08-09 2019-02-13 Essilor International Optical article comprising a substrate with embedded particles for light transmission enhancement
EP3441799A1 (en) 2017-08-09 2019-02-13 Essilor International Optical article comprising a substrate with embedded particles for abrasion and/or scratch resistance enhancement
JP7168656B2 (ja) * 2018-03-30 2022-11-09 三井化学株式会社 有機メルカプト化合物又はその中間体の製造方法、組成物、光学材料用重合性組成物、成形体、光学材料及びレンズ
WO2019209703A1 (en) 2018-04-27 2019-10-31 Novol, Inc. Method and system for molding of thermoplastic optical polymers
EP3564286A1 (en) 2018-04-30 2019-11-06 Essilor International Blue light cutting optical material having a bluish appearance
WO2020016620A1 (en) 2018-07-18 2020-01-23 Essilor International Optical article with improved antireflective coating, methods for making the same
US20210356763A1 (en) 2018-10-15 2021-11-18 Essilor International Optical Article Incorporating Optical Elements and Manufacturing Method Thereof
EP3640688B1 (en) 2018-10-18 2022-10-05 Essilor International Optical article having an interferential coating with an improved abrasion-resistance
EP3640687A1 (en) 2018-10-18 2020-04-22 Essilor International Optical article having an interferential coating with a high abrasion-resistance
WO2020104381A2 (en) 2018-11-19 2020-05-28 Essilor International Optical lens having a mirror coating and a multilayer system for improving abrasion-resistance
EP3654072B1 (en) 2018-11-19 2024-09-04 Essilor International Optical lens having a filtering interferential coating and a multilayer system for improving abrasion-resistance
EP3654071B1 (en) 2018-11-19 2024-07-31 Essilor International Optical lens having an interferential coating and a multilayer system for improving abrasion-resistance
BR112021009279A2 (pt) 2018-11-19 2021-08-10 Essilor International lente óptica tendo um revestimento interferencial melhorado e um sistema multicamada para melhoramento da resistência à abrasão
AU2019409977A1 (en) 2018-12-18 2021-07-08 Essilor International Optical article having a reflective coating with high abrasion-resistance
EP3763517A1 (en) 2019-07-09 2021-01-13 Essilor International Method for manufacturing a photochromic optical article
CN114555250A (zh) 2019-10-04 2022-05-27 依视路国际公司 具有涂覆有提供防雨功能的临时超疏水膜的疏水表面的制品及获得其的方法
EP3800167A1 (en) 2019-10-04 2021-04-07 Essilor International Article with a hydrophilic surface coated with a temporary super-hydrophobic film and process for obtaining same
CN110724077A (zh) * 2019-11-19 2020-01-24 山东益丰生化环保股份有限公司 一种1,2,3-三巯基乙基硫代丙烷的制备方法
WO2021123858A1 (en) 2019-12-19 2021-06-24 Essilor International Screen friendly optical article
WO2021123856A1 (en) 2019-12-19 2021-06-24 Essilor International Anti-reflective coating for side reflection
JP2023521235A (ja) 2020-04-17 2023-05-23 エシロール アンテルナショナル 低屈折率の厚いハードコートにより被包される表面微細構造を有するレンズ
HUE065095T2 (hu) 2020-04-17 2024-05-28 Essilor Int Továbbfejlesztett eljárás mikrolencséket tartalmazó optikai termék kialakítására
EP3816677B1 (en) 2020-04-23 2023-02-15 Essilor International Lens with surface microstructures encapsulated by a self-stratified coating
EP3919943A1 (en) 2020-06-03 2021-12-08 Essilor International Curable coating composition
EP3923038A1 (en) 2020-06-09 2021-12-15 Essilor International Optical article with a durability improved hard coating
EP3945105A1 (en) 2020-07-30 2022-02-02 Basf Se Process for preparing a hydroxy group functionalized thioether
EP4063941B1 (en) 2020-11-13 2024-07-10 Mitsui Chemicals, Inc. Polythiol composition, polymerizable composition, resin, molded article, optical material, and lens
US20240180419A1 (en) 2021-02-26 2024-06-06 Essilor International Method for determining at least one optical product intended to face an eye of a user using an eye resistance level and a light protection level
EP4091805A1 (en) 2021-05-18 2022-11-23 Essilor International A method for improved coating of an optical article comprising optical elements
EP4095570A1 (en) 2021-05-27 2022-11-30 Essilor International Optical lens having an asymmetric mirror
CN117396738A (zh) 2021-05-31 2024-01-12 依视路国际公司 用于评估旨在面对用户的眼睛的至少一个光学产品的至少一个光保护水平的方法
EP4102265A1 (en) 2021-06-09 2022-12-14 Essilor International Optical lens having an antireflection coating reflecting harmful blue light
EP4102264A1 (en) 2021-06-09 2022-12-14 Essilor International Optical lens having an antireflection coating reflecting harmful blue light and nir radiation
EP4352551A1 (en) 2021-06-09 2024-04-17 Essilor International Optical lens having an antireflection coating reflecting blue light
EP4109141A1 (en) 2021-06-21 2022-12-28 Essilor International Optical lens having a light-absorbing interferential coating
EP4359832A1 (en) 2021-06-21 2024-05-01 Essilor International Optical lens having an interferential coating and a multilayer system for improving abrasion-resistance
WO2024003383A1 (en) 2022-06-30 2024-01-04 Essilor International Method of fast curing a polythiourethane based substrate using a delayed-action catalyst
EP4344863A1 (en) 2022-09-30 2024-04-03 Essilor International Manufacturing method of an optical article incorporating optical elements by inkjet printing
WO2024074596A1 (en) 2022-10-05 2024-04-11 Essilor International Method of curing a polythiourethane based substrate with a salt catalyst
EP4382973A1 (en) 2022-12-07 2024-06-12 Essilor International An optical article with reduced visual fatigue
WO2024126518A2 (en) 2022-12-15 2024-06-20 Essilor International Method of heating an optical element
WO2024126747A1 (en) 2022-12-15 2024-06-20 Essilor International Method of curing a polythiourethane based substrate tolerant to water
WO2024127055A1 (en) 2022-12-16 2024-06-20 Essilor International Ophthalmic lens element with masking structures
WO2024133820A1 (en) 2022-12-21 2024-06-27 Essilor International Method of curing a polythiourethane based substrate coupled to a microstructured wafer
EP4442724A1 (en) 2023-04-04 2024-10-09 Essilor International Method of curing a polythiourethane-based substrate from a pre-polymer

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3544543A (en) * 1966-11-07 1970-12-01 Stauffer Chemical Co Reaction product of polymercaptans and episulfides
CA992105A (en) * 1970-03-26 1976-06-29 Exxon Research And Engineering Company Polythioethers formed by anionic ring opening of episulfides
US3954723A (en) * 1973-01-23 1976-05-04 Exxon Research & Engineering Co. Novel polythioether diols and their preparation
GB1499043A (en) * 1975-11-19 1978-01-25 Texaco Belgium Nv Sa Preparation of thioethers
DE2934948A1 (de) * 1979-08-29 1981-03-19 Agfa-Gevaert Ag, 5090 Leverkusen Verfahren zur herstellung von 2-mercaptoalkylsulfiden und 2-mercaptoalkylethern
JPS60158163A (ja) * 1984-01-30 1985-08-19 Nisso Yuka Kogyo Kk ポリチオアルキレンジメルカプタン類の製造方法
JPS60161962A (ja) * 1984-01-31 1985-08-23 Nisso Yuka Kogyo Kk ポリチオアルキレンジメルカプタン類の製造法
JPS60199016A (ja) * 1984-03-23 1985-10-08 Mitsui Toatsu Chem Inc チオカルバミン酸ｓ―アルキルエステル系レンズ用樹脂の製造方法
EP0235743B1 (en) * 1986-03-01 1990-01-31 MITSUI TOATSU CHEMICALS, Inc. High-refractivity plastic lens resin
JPH0777733B2 (ja) * 1986-12-15 1995-08-23 三井東圧化学株式会社 含硫ウレタン樹脂製レンズの注型重合方法

Also Published As

Publication number Publication date
CA1322377C (en) 1993-09-21
DE68907582D1 (de) 1993-08-19
CN1043498A (zh) 1990-07-04
EP0378895A1 (en) 1990-07-25
BR8904398A (pt) 1990-10-23
KR900009576A (ko) 1990-07-04
EP0378895B1 (en) 1993-07-14
DE68907582T2 (de) 1994-02-17
CN1164540A (zh) 1997-11-12
CN1063458C (zh) 2001-03-21
KR920005917B1 (ko) 1992-07-24
AU616298B2 (en) 1991-10-24
AU4097589A (en) 1990-07-19
CN1036390C (zh) 1997-11-12
US5087758A (en) 1992-02-11

Similar Documents

Publication Publication Date Title
HK143193A (en) A mercapto compound,a high refractive index resin and lens and a process for preparing them
AU605428B2 (en) A lens having a large refractive index and a process for producing the same
EP0422836A3 (en) Resin for urethane lenses, lenses comprising the resin, and a process for preparation of the resin and the lenses
AU3540589A (en) High refractive index lens and method for its production
AR243486A1 (es) Cristal fotocromico apropiado para lentes oftalmicos.
GB2179174B (en) Photochromic resin lens
AU2995089A (en) Resin for plastic lens having high-refractive index, lens comprising the resin, and method for preparation of the lens
AU625767B2 (en) Method for fabricating a transparent polymer lens with modulated refraction index
GB2161616B (en) Optically athermal infra-red lenses
EP0273710A3 (en) Resin having high refractive index, process for producing said resin and optical materials composed of said resin
EP0243605A3 (en) Fluorine-containing resin composition having a low refractive index
AU2998489A (en) Plastic lenses having a high-refracting index and process for the preparation thereof
EP0271839A3 (en) Casting polymerisation process for preparing sulfur-containing urethane resin lens
EP0357062A3 (en) A process for manufacturing colored contact lenses, and the lenses obtained by the process
EP0330363A3 (en) Highly-refractive plastic lens and process for making the lens
AU619952B2 (en) Resin having a high refractive index
GB2230730B (en) Lens mould
GB2169723B (en) A graded refractive index single lens system
AU551366B2 (en) Plastic lens with high refractive index
AU3797585A (en) Dimethallyl phtholate plastic lens
GB8813769D0 (en) Optical fibre
SG125093G (en) A mercapto compound a high refractive index resin and lens and a process for preparing them
EP0460646A3 (en) Polycarbonate resin composition for optical use
GB2226310B (en) Optical fibre manufacture
GB8828088D0 (en) Optical fibre manufacture

Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)