GB1350474A - Articles of bulk polymerised acrylic copolymers - Google Patents

Articles of bulk polymerised acrylic copolymers

Info

Publication number
GB1350474A
GB1350474A GB1484771*[A GB1484771A GB1350474A GB 1350474 A GB1350474 A GB 1350474A GB 1484771 A GB1484771 A GB 1484771A GB 1350474 A GB1350474 A GB 1350474A
Authority
GB
United Kingdom
Prior art keywords
acrylic
article
neutralization
articles
polymer
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
GB1484771*[A
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.)
Hydrophilics International Inc
Original Assignee
Hydrophilics International Inc
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 Hydrophilics International Inc filed Critical Hydrophilics International Inc
Publication of GB1350474A publication Critical patent/GB1350474A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • 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
    • C08F220/04—Acids; Metal salts or ammonium salts thereof
    • C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
    • 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
    • C08F8/44—Preparation of metal salts or ammonium salts
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/43—Thickening agents
    • 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
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2333/12—Homopolymers or copolymers of methyl methacrylate

Landscapes

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

Abstract

1350474 Articles of bulk polymerized acrylic copolymers HYDROPHILICS INTERNATIONAL Inc 13 May 1971 [13 May 1970 3 May 1971] 14847/71 Heading C3P [Also in Division G2] Hydrophilic polymer articles comprise a polymer made by bulk polymerization at an initial temperature of 40-65‹ C. and a final temperature of 80-95‹ C. of a monomer mixture comprising 50-95% of one or more C 1 -C 4 alkyl acrylates and/or methacrylates, 5-30% of acrylic and/or methacrylic acid, and 0-20% of one or more C 8 -C 18 aliphatic esters of acrylic and/or methacrylic acid, the percentages being by volume, based on the total monomer volume, the carboxylic acid groups on at least one surface of the article having been neutralized (without saponification of ester groups). The polymers are prepared in the form of, e.g. sheets or rods by carrying out the bulk polymerization in situ in a mould or casting cell, using a free radical generator, e.g. azodiisobutyronitrile, or U.V. light as initiator. Small amounts of a chain stopper, e.g. dodecyl mercaptan, and a cross-linker, e.g. ethylene glycol dimethacrylate, allyl methacrylate or divinyl benzene, may also be present. Neutralization is effected by treating the article with an aqueous base, such as NaOH, NH 4 OH, KOH, Ca(OH) 2 , ethanolamine or sodium tripolyphosphate. Neutralization may also be effected throughout the article, the depth of neutralization depending on the concentration of the base, and the duration of the treatment. The neutralized portions are hydrophilic and swell in water, in which state they can absorb therapeutic agents, such as pilocarpine, which are then slowly released by the polymer. In the examples sheets, rods or contact lenses, are formed from polymers or methylmethacrylate and acrylic acid, with or without ethylene glycol-dimethacrylate, divinyl benzene or ethyl hexyl acrylate, and are treated with NH 4 OH or NaOH. In Example 11, a contact lens of the invention is treated with pilocarpine solution; when in use, the substance is slowly released into the eye.
GB1484771*[A 1970-05-13 1971-05-13 Articles of bulk polymerised acrylic copolymers Expired GB1350474A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3693170A 1970-05-13 1970-05-13
US13954571A 1971-05-03 1971-05-03

Publications (1)

Publication Number Publication Date
GB1350474A true GB1350474A (en) 1974-04-18

Family

ID=26713642

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1484771*[A Expired GB1350474A (en) 1970-05-13 1971-05-13 Articles of bulk polymerised acrylic copolymers

Country Status (6)

Country Link
AR (1) AR192575A1 (en)
FR (1) FR2091532A5 (en)
GB (1) GB1350474A (en)
IL (1) IL36795A (en)
NL (1) NL7106472A (en)
SE (1) SE364466B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208512B (en) * 1987-01-12 1991-03-27 Ceskoslovenska Akademie Ved Contact or intraocular lens from lightly crosslinked polymer or copolymer of 2-hydroxyethyl methacryate and a method of production

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217869A (en) * 1988-04-22 1989-11-01 Ceskoslovenska Akademie Ved Contact lenses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208512B (en) * 1987-01-12 1991-03-27 Ceskoslovenska Akademie Ved Contact or intraocular lens from lightly crosslinked polymer or copolymer of 2-hydroxyethyl methacryate and a method of production

Also Published As

Publication number Publication date
SE364466B (en) 1974-02-25
IL36795A (en) 1974-10-22
AR192575A1 (en) 1973-02-28
NL7106472A (en) 1971-11-16
FR2091532A5 (en) 1972-01-14
IL36795A0 (en) 1971-07-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee