Polymerizable composition for coloring contact lenses

a technology of composition and color, applied in the field of polymerizable composition for coloring contact lenses, can solve the problems of discoloration or fading, easy peeling of colored layer from contact lenses, complicated method,

Active Publication Date: 2016-11-10
BENQ MATERIALS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The composition ensures excellent adhesion and prevents discoloration or deformation of colored contact lenses, offering a simpler and more effective manufacturing method compared to conventional approaches.

Problems solved by technology

However, the method is unfavorable because the colored layer lacks the interaction force with the contact lens, so that the colored layer is easily peeling from contact lenses and discoloration or fading occurs.
But, this method is so complicated and costly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example a

The Preparation Method of Composite Colorant (I)

[0040]100 g of Iron Oxide Black powder (trade name is Sicovit and is available from BASF, Germany), 150 ml of deionized water, 150 ml of ethanol, 22 ml of aqueous solution of ammonium (the weight percent concentration is 25%) and 5 ml of tetraethoxysilane (available from Acros Organics, US) were mixed uniformly in a flask to form a mixture. Next, the mixture was heated to 65° C. for 2 hours, after that, 8 ml of 3-methacryloxypropyltrimethoxysilane (trade name is KBM503 and is valuable from Shin-Etsu Silicone, Japan) was added into the flask and reacted for another 6 hours. Then, the supernatant of the resulting reaction solution was removed by using of centrifugation, after that, the remaining solution was washed with ethanol and deionized water. After the solvent was removed, the composite colorant (I) was obtained.

example b

The Preparation Method of Composite Colorant (II)

[0041]The preparation method of Example B was the same as Example A, except that the amount of silane coupling agent. The silane coupling used in Example B was 4 ml.

example c

The Preparation Method of Composite Colorant (III)

[0042]The preparation method of Example C was the same as Example A, except that the amount of silane coupling agent. The silane coupling agent used in Example C was 2 ml.

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Abstract

The disclosure is related to a polymerizable composition for coloring contact lens, comprising a composite colorant and at least one hydrophilic monomer. The composite colorant is produced by a reaction of a colorant precursor and a (methyl)methacryloxy group-containing shine coupling agent. The colorant precursor is produced by a reaction of a metal oxide and a siloxane compound under alkaline solution.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of Taiwanese application Ser. No. 104114162, filed on May 4, 2015, which is incorporated herein by reference.BACKGROUND[0002]1. Technical Field[0003]The present disclosure relates to a polymerizable composition for coloring contact lenses. More particularly, the polymerizable composition for coloring contact lenses has good adhesion to the contact lenses so that no discoloration or fading occurred on the colored contact lenses made from hydrogel or silicone hydrogel.[0004]2. Description of Related Art[0005]Nowadays, concerning fashion or clothes matching, people begin to wear colored contact lenses capable of altering their natural iris color. However these different colored or patterned contact lenses would fade or discolor so as to make the wearers have ocular allergy.[0006]One of the conventional methods for manufacturing colored contact lens is to mix a colorant and the hydrophilic monomers ...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G02C7/10G02C7/04G02B1/04C08K3/22
CPCG02C7/108C08K3/22C08K2003/2265G02B1/043G02C7/04
InventorJAN, FAN-DANCHENG, TSUNG-JUNG
OwnerBENQ MATERIALS CORP