Colored ink for pad transfer printing of silicone hydrogel lenses

Colored ink for pad transfer printing of silicone hydrogel lenses

  • CN 103,091,730 A
  • Filed: 03/31/2005
  • Published: 05/08/2013
  • Est. Priority Date: 04/01/2004
  • Status: Active Application
First Claim
Patent Images

1. manufacture the method for colored silicone hydrogel contact lenses, comprise the following steps:

  • (a) with printing ink, coloured coating is imposed at least a portion of at least one lens die molded surface, wherein printing ink contains at least one colorant, adhesion promoter, at least one contains at least one first functionalized vinyl monomer that is selected from the group that hydroxyl-OH, amino-NHR, carboxyl-COOH, epoxy radicals, amide group-CONHR and combination thereof form, have the crosslinkable groups that is selected from the group that hydroxyl, amino-NHR, carboxyl, epoxy radicals, amide group-CONHR and combination thereof form containing the silicone binder polymer, and optional thinning agent, wherein R is hydrogen or C 1to C 8alkyl;

    Containing the silicone binder polymer, be wherein the copolymerization product that comprises following polymerizable mixture (i) at least one hydrophilic ethylene class monomer;

    (ii) at least one second functionalized vinyl monomer, contain the functional group that at least one is selected from the group of hydroxyl-OH, amino-NHR, carboxyl-COOH, epoxy radicals, amide group-CONHR and combination composition thereof, and wherein R is hydrogen or C 1to C 8alkyl;

    (iii) at least one silicone-containing vinyl monomer or large monomer, and(iv) optional one or more are selected from the component of the group of polymerization initiator, chain-transferring agent and solvent composition, wherein lens die comprises the first half module with first molded surface that limits the contact lenses front surface and the second half module with second molded surface that limits the contact lenses rear surface, wherein the first and second half modules are manufactured into and can mutually receive, thereby form contact lenses and form chamber between the first and second molded surfaces, wherein coloured coating contains the first surface that is exposed to lens shaped coelosis inside and the second surface contacted with molded surface;

    (b) make to be imprinted on the part or all of heat curing of mould curing ink, so that coloured coating is changed into to colour film;

    (c) silicone hydrogel lens is formed to Distribution of materials in the lens shaped coelosis of mould;

    And(d) in the lens shaped coelosis, cured lens forms material to form contact lenses, and colour film breaks away from and becomes one with contact lenses from molded surface thus.

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