[go: up one dir, main page]

GB1374670A - Contact lens having an optimum combination of properties - Google Patents

Contact lens having an optimum combination of properties

Info

Publication number
GB1374670A
GB1374670A GB2702772A GB2702772A GB1374670A GB 1374670 A GB1374670 A GB 1374670A GB 2702772 A GB2702772 A GB 2702772A GB 2702772 A GB2702772 A GB 2702772A GB 1374670 A GB1374670 A GB 1374670A
Authority
GB
United Kingdom
Prior art keywords
contact lens
per cent
properties
optimum combination
weight
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
GB2702772A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1374670A publication Critical patent/GB1374670A/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
    • 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
    • C08F220/00—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
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/22—Esters containing halogen

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Eyeglasses (AREA)

Abstract

1374670 Contact lenses E I DU PONT DE NEMOURS & CO 9 June 1972 [11 June 1971] 27027/72 Heading G2J [Also in Division C3] Contact lenses are constructed from copolymers of 10-70 per cent by weight methyl methacrylate and 30-90 per cent by weight of at least one methacrylate ester of a fluoro-alcohol, and have a refractive index of 1À36 to 1À45, a Knoop hardness of 5 to 16, a tensile modulus of 50,000 to 250,000 p.s.i., a permeability to O 2 and CO 2 of at least 1,000 centibarrers and not more than 5 per cent by weight water content. The lens may be a corneal or scleral contact lens. Reference has been directed by the Comptroller to Specification 1254567.
GB2702772A 1971-06-11 1972-06-09 Contact lens having an optimum combination of properties Expired GB1374670A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15207371A 1971-06-11 1971-06-11

Publications (1)

Publication Number Publication Date
GB1374670A true GB1374670A (en) 1974-11-20

Family

ID=22541411

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2702772A Expired GB1374670A (en) 1971-06-11 1972-06-09 Contact lens having an optimum combination of properties

Country Status (7)

Country Link
JP (1) JPS5146614B1 (en)
CA (1) CA969791A (en)
DE (1) DE2228517C3 (en)
FR (1) FR2141814B1 (en)
GB (1) GB1374670A (en)
IT (1) IT956453B (en)
NL (1) NL7207879A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320028A (en) * 1996-12-06 1998-06-10 Shofu Kabushiki Kaisha Dental elastic restorative material
EP1571165A1 (en) * 2004-03-01 2005-09-07 Lorenzo Toffano Compositions for the preparation of hydrophobic coatings

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130706A (en) * 1977-08-08 1978-12-19 E. I. Du Pont De Nemours And Company Hydrophilic, oxygen permeable contact lens
JPH073517B2 (en) * 1985-11-29 1995-01-18 チバ―ガイギー アクチエンゲゼルシャフト Non-hydrous soft contact lens and method for producing the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320028A (en) * 1996-12-06 1998-06-10 Shofu Kabushiki Kaisha Dental elastic restorative material
GB2320028B (en) * 1996-12-06 2000-10-11 Shofu Kabushiki Kaisha Dental elastic restorative material and method for production of dental prosthetic material using the same
US6136886A (en) * 1996-12-06 2000-10-24 Kabushiki Kaisha Shofu Dental elastic restorative material and method for production of dental prosthetic material using the same
EP1571165A1 (en) * 2004-03-01 2005-09-07 Lorenzo Toffano Compositions for the preparation of hydrophobic coatings

Also Published As

Publication number Publication date
FR2141814B1 (en) 1977-12-23
DE2228517C3 (en) 1974-10-31
IT956453B (en) 1973-10-10
NL7207879A (en) 1972-12-13
FR2141814A1 (en) 1973-01-26
DE2228517A1 (en) 1972-12-28
CA969791A (en) 1975-06-24
DE2228517B2 (en) 1974-04-04
JPS5146614B1 (en) 1976-12-10

Similar Documents

Publication Publication Date Title
GB1254567A (en) Contact lens
ES8601250A1 (en) Ultraviolet absorbing polymers comprising 2-hydroxy-5-acrylyloxalkylphenyl-2H-benzotriazoles.
ES8107265A1 (en) Water absorbing contact lenses made from polysiloxane/acrylic acid polymer
JPS5515110A (en) Contact lens
GB1304739A (en)
EP0376052A3 (en) Polycarbonate-based resin composition
FR2270613A1 (en) Very strong spectacle lenses - has a continuously variable refractive index
EP0351364A3 (en) Dimethylacrylamide-copolymer hydrogels with high oxygen permeability
GB1463107A (en)
GB1374670A (en) Contact lens having an optimum combination of properties
JPS52102047A (en) Bundle of optical fibers
DE3062767D1 (en) Contact lenses made from methyl methacrylate copolymers
GB9100354D0 (en) Optical glass of negative anomalous partial dispersion in the blue region,index nd of from 1.69 to 1.83 and abbe coefficient vd of from 29 to 38.5
GB810232A (en) Improvements in artificial intraocular lenses
SU637074A3 (en) Composition of bath for strengthening glass
JPS53134787A (en) Stain-removing agent containing fluoroalkyl radical
JPS537789A (en) Copolymers for use in lenses and their preparation
GB910455A (en) Improvements in or relating to corneal lenses
JPS5229234A (en) Optical fiber
JPS537788A (en) Copolymers for use in lenses and their preparation
JPS5562910A (en) Anti-fogging transparent article and its preparation
GB1394056A (en) Contact lenses
JPS5515118A (en) Improved copolymer for high refractive index lens
JPS5434419A (en) Production of modified polyvinyl alcohol fiber
JPS5255651A (en) Light-diffusing plate

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee