GB829565A - Shaped hydrophilic articles and method of manufacturing same - Google Patents

Shaped hydrophilic articles and method of manufacturing same

Info

Publication number
GB829565A
GB829565A GB1250356A GB1250356A GB829565A GB 829565 A GB829565 A GB 829565A GB 1250356 A GB1250356 A GB 1250356A GB 1250356 A GB1250356 A GB 1250356A GB 829565 A GB829565 A GB 829565A
Authority
GB
United Kingdom
Prior art keywords
water
cross
article
mixture
hydrophilic
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
GB1250356A
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.)
Individual
Original Assignee
Individual
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
Priority to FR1169574D priority Critical patent/FR1169574A/en
Application filed by Individual filed Critical Individual
Priority to GB1250356A priority patent/GB829565A/en
Publication of GB829565A publication Critical patent/GB829565A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/62—Monocarboxylic acids having ten or more carbon atoms; Derivatives thereof
    • 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
    • B29D11/00038—Production of contact 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
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/14—Esterification
    • 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
    • G02B1/043—Contact 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
    • C08F2810/00—Chemical modification of a polymer
    • C08F2810/20—Chemical modification of a polymer leading to a crosslinking, either explicitly or inherently
    • 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
    • C08F2810/00—Chemical modification of a polymer
    • C08F2810/30—Chemical modification of a polymer leading to the formation or introduction of aliphatic or alicyclic unsaturated groups

Landscapes

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

Abstract

Hydrophilic swollen shaped articles such as contact lenses, plates or filling bodies for surgical purposes, pessaries or diaphragms, are made by cross-linking long-chain linear polymers containing numerous hydrophilic non-ionic groups in a mould which has the shape of the desired article or the shape of a block from which the article is shaped by cutting, the cross-linking being effected so as to obtain, on an average, one cross-link for every 50 to 600 monomeric units of the linear polymer, the process being carried out in the presence of water and/or a water-soluble inert liquid such as ethylene glycol, a poly-alkylene glycol or glycerine constituting 20 to 97% of the total weight of the reaction mixture, the article thereafter being washed with water and then stored in water or an aqueous solution. The hydrophilic groups of the polymer may be hydroxyl, ether, amide, triazole, tetrazole or lactone groups. In examples: (1) a solution of polyvinyl alcohol in water is heated with adipic acid and hydrogen chloride until a hydrogel is obtained; (2) polyvinyl alcohol is partially esterified with methacrylic anhydride and the resulting ester is polymerized in solution in water in the presence of a mixture of potassium persulphate and sodium thiosulphate; (3) triethyleneglycol monomethacrylate and dimethacrylate are copolymerized in a mixture of ethylene glycol and water in the presence of potassium persulphate.
GB1250356A 1957-04-24 1957-04-24 Shaped hydrophilic articles and method of manufacturing same Expired GB829565A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR1169574D FR1169574A (en) 1957-04-24 1956-10-30 Hydrophilic shaped bodies such as ophthalmic contact lenses auxiliary to surgery and the like
GB1250356A GB829565A (en) 1957-04-24 1957-04-24 Shaped hydrophilic articles and method of manufacturing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1250356A GB829565A (en) 1957-04-24 1957-04-24 Shaped hydrophilic articles and method of manufacturing same

Publications (1)

Publication Number Publication Date
GB829565A true GB829565A (en) 1960-03-02

Family

ID=10005797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1250356A Expired GB829565A (en) 1957-04-24 1957-04-24 Shaped hydrophilic articles and method of manufacturing same

Country Status (2)

Country Link
FR (1) FR1169574A (en)
GB (1) GB829565A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4950089A (en) * 1972-05-22 1974-05-15
GB2144749A (en) * 1983-08-09 1985-03-13 Plastomedical Sciences Inc Disposable, hydrogel soft contact lenses
US5824328A (en) * 1987-04-01 1998-10-20 Stockhausen Gmbh Insecticidal delivery compositions and methods for controlling a population of insects in an aquatic environment

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ200362A (en) * 1981-04-30 1985-10-11 Mia Lens Prod A method of forming a hydrophilic polymer suitable for use in the manufacture of soft contact lenses and a mould for use in the polymerization
US5080839A (en) * 1990-04-17 1992-01-14 Johnson & Johnson Vision Products, Inc. Process for hydrating soft contact lenses

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4950089A (en) * 1972-05-22 1974-05-15
JPS5756484B2 (en) * 1972-05-22 1982-11-30
GB2144749A (en) * 1983-08-09 1985-03-13 Plastomedical Sciences Inc Disposable, hydrogel soft contact lenses
US5824328A (en) * 1987-04-01 1998-10-20 Stockhausen Gmbh Insecticidal delivery compositions and methods for controlling a population of insects in an aquatic environment

Also Published As

Publication number Publication date
FR1169574A (en) 1958-12-31

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