A photochromic lens with uniform color change and preparation method thereof

Abstract

The present invention discloses a photochromic lens with uniform color change and a preparation method thereof, comprising: a photochromic lens; a material of a photochromic lens substrate comprising any one of polyurethane, acrylic acid, polymethacrylate or polycarbonate or a combination of at least two thereof; the photochromic lens substrate further comprises a color-changing liquid substrate, the color-changing liquid substrate comprising 50 to 80 parts of a resin monomer, 5 to 20 parts of a color-changing liquid and 1 to 5 parts of an initiator, the resin monomer being any one of polycarbonate, acrylate or polymethyl methacrylate or a combination of at least two thereof; the initiator comprising any one of monomethyltin dichloride, dimethyltin dichloride, trimethyltin monochloride, diethyltin dichloride, dimethyltin dibromide, dibutyltin dichloride or trimethyltin monobromide or a combination of at least two thereof. The present invention mixes the color-changing liquid with the resin monomer and stirs and mixes them with the lens substrate by vacuuming, and after uniform mixing, it is beneficial to improve the uniform distribution of the color-changing liquid, thereby improving the color change uniformity of the color-changing lens.

Description

Technical Field

[0001] The invention belongs to the technical field of photochromic lenses, and in particular relates to a photochromic lens with uniform color change and a preparation method thereof. Background Art

[0002] Photochromic lenses are lenses that become darker when exposed to light of a certain wavelength (usually ultraviolet light), and return to their original transmittance and become clear when no longer exposed to this light source. Photochromic lenses are widely used in sunglasses, optical glasses, snow goggles, sports goggles and protective goggles due to their unique properties. However, existing photochromic lenses may change color unevenly in daily life, resulting in panda eyes and affecting the aesthetics of wearing. In order to solve this problem, a photochromic lens with uniform color change and a preparation method thereof are provided. Summary of the invention

[0003] In view of this, the technical problem to be solved by the present invention is to provide a photochromic lens with uniform color change and a preparation method thereof, which solves the problem of uneven color change of photochromic lenses in the prior art.

[0004] In order to solve the above technical problems, the present invention discloses a substrate photochromic lens, comprising: a photochromic lens; the material of the photochromic lens substrate comprises any one of polyurethane, polyacrylic acid, polymethacrylate or polycarbonate, or a combination of at least two thereof; the photochromic lens substrate also comprises a color-changing liquid substrate, the color-changing liquid substrate comprises 50 to 80 parts of a resin monomer, 5 to 20 parts of a color-changing liquid and 1 to 5 parts of an initiator, the resin monomer is any one of polycarbonate, acrylate or polymethyl methacrylate, or a combination of at least two thereof; the initiator comprises any one of monomethyltin dichloride, dimethyltin dichloride, trimethyltin monochloride, diethyltin dichloride, dimethyltin dibromide, dibutyltin dichloride or trimethyltin monobromide, or a combination of at least two thereof.

[0005] Furthermore, the color-changing liquid substrate also contains an antioxidant, a light stabilizer, a release agent, a plasticizer and a defoaming agent.

[0006] Furthermore, the above-mentioned release agent includes any one of isopropyl phosphate, diisopropyl phosphate or butyric acid phosphate, or a combination of at least two thereof.

[0007] The method for preparing a substrate photochromic lens is characterized by comprising the following steps: (1) According to the formula, polycarbonate, acrylic acid, spiropyran photochromic liquid and other additives are mixed and added into a reactor, and then the added initiator is vacuumed at a reaction temperature of 30 to 50° C. for 30 to 40 minutes, and during this process, the mixture is continuously shaken to mix evenly, and a plasticizer is added; (2) After mixing evenly, pour the completely degassed mixture into a specially made glass mold and then place it in a drying oven for curing; (3) After the primary curing and molding, the lens is subjected to the steps of mold opening, edge trimming and cleaning, and then subjected to secondary curing to eliminate the internal stress of the resin lens, and finally the mold is opened to obtain the photochromic lens.

[0008] Compared with the prior art, the present application can obtain the following technical effects: The present invention mixes the color-changing liquid with the resin monomer and stirs and mixes it with the lens substrate by vacuuming. After the mixture is evenly mixed, it is beneficial to improve the uniform distribution of the color-changing liquid, thereby improving the color change uniformity of the color-changing lens.

[0009] Of course, any product implementing this application does not necessarily need to achieve all of the technical effects described above at the same time. DETAILED DESCRIPTION

[0010] The following will explain the implementation methods of the present application in detail with reference to examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Example 1

[0011] A photochromic lens with uniform color change, comprising: a photochromic lens; a material of a photochromic lens substrate comprising any one of polyurethane, acrylic acid, polymethacrylate or polycarbonate, or a combination of at least two thereof; the photochromic lens substrate also comprises a color-changing liquid substrate, the color-changing liquid substrate comprises 75 parts of a resin monomer, 20 parts of a color-changing liquid and 5 parts of an initiator, the resin monomer being any one of polycarbonate, acrylate or polymethyl methacrylate, or a combination of at least two thereof; the initiator comprising any one of monomethyltin dichloride, dimethyltin dichloride, trimethyltin monochloride, diethyltin dichloride, dimethyltin dibromide, dibutyltin dichloride or trimethyltin monobromide, or a combination of at least two thereof.

[0012] The color-changing liquid base material also has an antioxidant, a light stabilizer, a release agent, a plasticizer and a defoaming agent.

[0013] The release agent includes any one of isopropyl phosphate, diisopropyl phosphate or butyric acid phosphate or a combination of at least two thereof.

[0014] The method for preparing a substrate photochromic lens is characterized by comprising the following steps: (1) According to the formula, polycarbonate, acrylic acid, spiropyran photochromic liquid and other additives are mixed and added into a reactor, and then the added initiator is vacuumed at a reaction temperature of 30 to 50° C. for 30 to 40 minutes, and during this process, the mixture is continuously shaken to mix evenly, and a plasticizer is added; (2) After mixing evenly, pour the completely degassed mixture into a specially made glass mold and then place it in a drying oven for curing; (3) After the primary curing and molding, the lens is subjected to the steps of mold opening, edge trimming and cleaning, and then subjected to secondary curing to eliminate the internal stress of the resin lens, and finally the mold is opened to obtain the photochromic lens. Example 2

[0015] The photochromic lens substrate also includes a color-changing liquid substrate, which has 80 parts of a resin monomer, 15 parts of a color-changing liquid and 5 parts of an initiator, wherein the resin monomer is any one of polycarbonate, acrylate or polymethyl methacrylate or a combination of at least two of them; the initiator includes any one of monomethyltin dichloride, dimethyltin dichloride, trimethyltin monochloride, diethyltin dichloride, dimethyltin dibromide, dibutyltin dichloride or trimethyltin monobromide or a combination of at least two of them.

[0016] The method for preparing a substrate photochromic lens is characterized by comprising the following steps: (1) According to the formula, polycarbonate, acrylic acid, spiropyran photochromic liquid and other additives are mixed and added into a reactor, and then the added initiator is vacuumed at a reaction temperature of 30 to 50° C. for 30 to 40 minutes, and during this process, the mixture is continuously shaken to mix evenly, and a plasticizer is added; (2) After mixing evenly, pour the completely degassed mixture into a specially made glass mold and then place it in a drying oven for curing; (3) After the primary curing and molding, the lens is subjected to the steps of mold opening, edge trimming and cleaning, and then subjected to secondary curing to eliminate the internal stress of the resin lens, and finally the mold is opened to obtain the photochromic lens. Example 3

[0017] The photochromic lens substrate also includes a color-changing liquid substrate, which has 78 parts of a resin monomer, 19 parts of a color-changing liquid and 3 parts of an initiator. The resin monomer is any one of polycarbonate, acrylate or polymethyl methacrylate, or a combination of at least two of them; the initiator includes any one of monomethyltin dichloride, dimethyltin dichloride, trimethyltin monochloride, diethyltin dichloride, dimethyltin dibromide, dibutyltin dichloride or trimethyltin monobromide, or a combination of at least two of them.

[0018] The method for preparing a substrate photochromic lens is characterized by comprising the following steps: (1) According to the formula, polycarbonate, acrylic acid, spiropyran photochromic liquid and other additives are mixed and added into a reactor, and then the added initiator is vacuumed at a reaction temperature of 30 to 50° C. for 30 to 40 minutes, and during this process, the mixture is continuously shaken to mix evenly, and a plasticizer is added; (2) After mixing evenly, pour the completely degassed mixture into a specially made glass mold and then place it in a drying oven for curing; (3) After the primary curing and molding, the lens is subjected to the steps of mold opening, edge trimming and cleaning, and then subjected to secondary curing to eliminate the internal stress of the resin lens, and finally the mold is opened to obtain the photochromic lens.

[0019]

[0020] The above table shows that the resin monomer, initiator, antioxidant, light stabilizer, release agent, plasticizer and defoamer in the color-changing liquid base material can make the color-changing liquid mix and diffuse more evenly, so that the light transmittance of the cured lens matrix is ​​better.

[0021] The present invention mixes the color-changing liquid with the resin monomer and stirs and mixes it with the lens substrate by vacuuming. After the mixture is evenly mixed, it is beneficial to improve the uniform distribution of the color-changing liquid, thereby improving the color change uniformity of the color-changing lens.

[0022] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A photochromic lens with uniform color change, comprising: Photochromic lenses; the material of the photochromic lens substrate includes any one of polyurethane, polyacrylic acid, polymethacrylate or polycarbonate, or a combination of at least two thereof; It is characterized in that the photochromic lens substrate also includes a color-changing liquid substrate, which has 50 to 80 parts of a resin monomer, 5 to 20 parts of a color-changing liquid and 1 to 5 parts of an initiator, the resin monomer is any one of polycarbonate, acrylate or polymethyl methacrylate or a combination of at least two of them; the initiator includes any one of monomethyltin dichloride, dimethyltin dichloride, trimethyltin monochloride, diethyltin dichloride, dimethyltin dibromide, dibutyltin dichloride or trimethyltin monobromide or a combination of at least two of them.

2. The photochromic lens with uniform color change according to claim 1, characterized in that: The color-changing liquid base material also contains an antioxidant, a light stabilizer, a release agent, a plasticizer and a defoaming agent.

3. The photochromic lens with uniform color change according to claim 2, characterized in that: The release agent includes any one of isopropyl phosphate, diisopropyl phosphate or butyric acid phosphate or a combination of at least two thereof.

4. The method for preparing a photochromic lens with uniform color change according to claim 1, characterized in that: The following steps are involved: (1) According to the formula, polycarbonate, acrylic acid, spiropyran photochromic liquid and other additives are mixed and added into a reactor, and then the added initiator is vacuumed at a reaction temperature of 30 to 50° C. for 30 to 40 minutes, and during this process, the mixture is continuously shaken to mix evenly, and a plasticizer is added; (2) After mixing evenly, pour the completely degassed mixture into a specially made glass mold and then place it in a drying oven for curing; (3) After the primary curing and molding, the lens is subjected to the steps of mold opening, edge trimming and cleaning, and then subjected to secondary curing to eliminate the internal stress of the resin lens, and finally the mold is opened to obtain the photochromic lens.

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