Colorant film, method for making colorant film, and ophthalmic lens

Patent metadata

Field	Value
Publication number	US-9952451-B2
Application number	US-201514961092-A
Country	US
Kind code	B2
Filing date	Dec 7, 2015
Priority date	Oct 30, 2015
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A method for making a colorant film providing eye care includes following steps of providing a plurality of microcapsules containing hydrogen peroxide aqueous solution; mixing a hydrophilic monomer, a cross-linking agent, and an initiator to form a mixture; mixing the microcapsules, the mixture, a pigment, and a solvent to form a colorant material; printing the colorant material into a mold; and heating or irradiating the colorant material in the mold to copolymerize the hydrophilic monomer, the initiator, and the cross-linking agent. A colorant film, and the manufacture of an ophthalmic lens are also provided.

First claim

What is claimed is:

1. A method for making a colorant film comprising:
providing a plurality of microcapsules containing hydrogen peroxide aqueous solution;
mixing a hydrophilic monomer, a cross-linking agent, and an initiator together to form a mixture;
mixing the microcapsules, the mixture, a pigment and a solvent together to form a colorant material;
printing the colorant material into a mold; and
heating the colorant material in the mold or irradiating the colorant material in the mold by ultraviolet light to copolymerize the hydrophilic monomer, the initiator, and the cross-linking agent.

2. The method of claim 1 , wherein the microcapsules have a mass percentage of about 0.01% to about 7% in the colorant material, the mixture has a mass percentage of about 31% to about 74.99% in the colorant material, the pigment has a mass percentage of about 20% to about 41% in the colorant material, the solvent has a mass percentage of about 5% to about 21% in the colorant material.

3. The method of claim 1 , wherein each of the microcapsules has a peripheral wall made of a material selected from a group consisting of natural macromolecular material, semisynthetic macromolecular material, and synthetic macromolecular material.

4. The method of claim 3 , wherein the natural macromolecular material is selected from a group consisting of gelatin, chitin, starch, arabic gum, shellac, dextrin, wax, pine resin, sodium alginate, and zein; the semisynthetic macromolecular material is selected from a group consisting of carboxymethyl cellulose, methyl cellulose, and ethyl cellulose; the synthetic macromolecular material is selected from a group consisting of polylactic-co-glycolic acid), polylactic acid, and polyglycolide acid.

5. The method of claim 1 , wherein the hydrogen peroxide aqueous solution has a mass concentration of 0.5% to 8%.

6. A colorant film comprising:
a matrix copolymerized from a hydrophilic monomer, an initiator, and a cross-linking agent;
a pigment; and
a plurality of microcapsules containing hydrogen peroxide aqueous solution;

wherein the pigment and the microcapsules are dispersed in the matrix.

7. The colorant film of claim 6 , wherein the colorant film is formed by heating or by irradiating a colorant material by ultraviolet light; the colorant material comprises the pigment, the microcapsules, a mixture comprising the hydrophilic monomer, the initiator, and the cross-linking agent, and a solvent; the microcapsules have a mass percentage of about 0.01% to about 7% in the colorant material, the mixture has a mass percentage of about 31% to about 74.99% in the colorant material, the pigment has a mass percentage of about 20% to about 41% in the colorant material, and the solvent has a mass percentage of about 5% to about 21% in the colorant material.

8. The colorant film of claim 6 , wherein each of the microcapsules has a peripheral wall made of a material selected from a group consisting of natural macromolecular material, semisynthetic macromolecular material, and synthetic macromolecular material.

9. The colorant film of claim 8 , wherein the natural macromolecular material is selected from a group consisting of gelatin, chitin, starch, arabic gum, shellac, dextrin, wax, pine resin, sodium alginate, and zein; the semisynthetic macromolecular material is selected from a group consisting of carboxymethyl cellulose, methyl cellulose, and ethyl cellulose; the synthetic macromolecular material is selected from a group consisting of poly(lactic-co-glycolic acid), polylactic acid, and polyglycolide acid.

10. The colorant film of claim 6 , wherein the colorant film has a thickness of 1 μm to 45 μm, the hydrogen peroxide aqueous solution has a mass concentration of 0.5% to 8%.

11. An ophthalmic lens comprising:
a substrate made of a hydrogel or silicone hydrogel; and
a colorant film attached to a surface of the substrate;
wherein the colorant film comprises a plurality of microcapsules containing hydrogen peroxide aqueous solution, the colorant film further comprises a matrix copolymerized from a hydrophilic monomer, an initiator, and a cross-linking agent, the microcapsules are dispersed in the matrix.

12. The ophthalmic lens of claim 11 , wherein each of the microcapsules has a peripheral wall made of a material selected from a group consisting of natural macromolecular material, semisynthetic macromolecular material, and synthetic macromolecular material.

13. The ophthalmic lens of claim 12 , wherein the natural macromolecular material is selected from a group consisting of gelatin, chitin, starch, arabic gum, shellac, dextrin, wax, pine resin, sodium alginate, and zein; the semisynthetic macromolecular material is selected from a group consisting of carboxymethyl cellulose, methyl cellulose, and ethyl cellulose; the synthetic macromolecular material is selected from a group consisting of poly(lactic-co-glycolic acid), polylactic acid, and polyglycolide acid.

14. The ophthalmic lens of claim 11 , wherein the hydrogen peroxide aqueous solution has a mass concentration of 0.5% to 8%.

15. The ophthalmic lens of claim 11 , wherein the colorant film has a thickness of 1 μm to 45 μm.

Assignees

• Hon Hai Prec Ind Co Ltd

Inventors

• Chien Hsiu-Wen

Classifications

• C08J3/28

  Treatment by wave energy or particle radiation · CPC title

• B29K2105/0032

  Pigments, colouring agents or opacifiyng agents · CPC title

• C08J7/0427

  with only one layer of a composition containing a polymer binder (with more layers C08J7/042) · CPC title

• B29K2105/0076

  Microcapsules · CPC title

• A61L27/58

  Materials at least partially resorbable by the body · CPC title