GB636785A - Production of optical elements - Google Patents

Production of optical elements

Info

Publication number
GB636785A
GB636785A GB1187448A GB1187448A GB636785A GB 636785 A GB636785 A GB 636785A GB 1187448 A GB1187448 A GB 1187448A GB 1187448 A GB1187448 A GB 1187448A GB 636785 A GB636785 A GB 636785A
Authority
GB
United Kingdom
Prior art keywords
optical elements
methacrylate
ethylenically unsaturated
optical element
production
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB1187448A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JOHN PATRICK CAVANAGH
Imperial Chemical Industries Ltd
Original Assignee
JOHN PATRICK CAVANAGH
Imperial Chemical Industries Ltd
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 JOHN PATRICK CAVANAGH, Imperial Chemical Industries Ltd filed Critical JOHN PATRICK CAVANAGH
Priority to GB1187448A priority Critical patent/GB636785A/en
Publication of GB636785A publication Critical patent/GB636785A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/04—Azo-compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Ophthalmology & Optometry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Optical elements are formed by photopolymerizing, in contact with a mould surface an ethylenically unsaturated liquid monomeric compound or a partial polymer thereof or a mixture of the two in the presence of 1,11-azodicyclohexane-carbonitrile or an alkyl ester or amide derived therefrom. The ethylenically unsaturated compounds may be methacrylic acid, methyl methacrylate, cyclohexyl methacrylate, 2,2-trifluorethyl methacrylate and esters of alpha-fluoroacrylic acid with fluorinated alcohols. If desired, the polymerization may be assisted by heating. In a modification, the optical element may first be formed as a preform which is subsequently converted to the optical element by the process of Specification 582,248. Specifications 618,787, 622,374, 626,155 and 636,283 also are referred to.
GB1187448A 1948-04-30 1948-04-30 Production of optical elements Expired GB636785A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1187448A GB636785A (en) 1948-04-30 1948-04-30 Production of optical elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1187448A GB636785A (en) 1948-04-30 1948-04-30 Production of optical elements

Publications (1)

Publication Number Publication Date
GB636785A true GB636785A (en) 1950-05-03

Family

ID=9994254

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1187448A Expired GB636785A (en) 1948-04-30 1948-04-30 Production of optical elements

Country Status (1)

Country Link
GB (1) GB636785A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561401A1 (en) * 1984-03-16 1985-09-20 Ceskoslovenska Akademie Ved PROCESS FOR THE POLYMERIZATION OF MIXTURES OF MONOMERS FOR THE PRODUCTION OF CONTACT LENSES BY CENTRIFUGAL MOLDING

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561401A1 (en) * 1984-03-16 1985-09-20 Ceskoslovenska Akademie Ved PROCESS FOR THE POLYMERIZATION OF MIXTURES OF MONOMERS FOR THE PRODUCTION OF CONTACT LENSES BY CENTRIFUGAL MOLDING

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