Polycarbonate resin composition having consistent color and stable blue light cut-off performance

Abstract

Embodiments of the present disclosure relate to a series of PC resin additives for maintaining color stability and blue light cut-off performance during injection molding. The additive can be used to adapt PC resins, typically used for sunscreen lenses, for transparent lens applications.

Description

[0001] This application is a divisional application of the patent application with application number 201780057269.5, application date September 20, 2017, and invention name “Polycarbonate resin composition with consistent color and stable blue light cutoff performance”. Technical Field

[0002] The present invention relates to the field of ophthalmic lenses, including polarized ophthalmic lenses for spectacles and sunglasses. Background Art

[0003] Lenses made from commercially available polycarbonate (PC) resins, typically used in the sunglass and visor markets, have historically been shown to exhibit significantly higher blue light cutoff performance than those made from clear ophthalmic grade PC resins. These PC resins are targeted for solar lens applications where the lenses are significantly tinted. When these resins are employed in clear ophthalmic lens applications, a slight yellow tint is evident. The yellow tint is due in part to the inclusion of UV absorbers that filter blue light.

[0004] Injection molded sunglass lenses using the above PC resins include tinting that masks color changes caused by the injection molding process. Because color changes are generally not noticeable in heavily tinted lenses, manufacturers do not need to incorporate additives that minimize color changes. When these PC resins are used to produce clear or lightly tinted ophthalmic lenses by injection molding, the color changes become noticeable.

[0005] Lenses using the above PC resins may gradually change color appearance during use due to photodegradation of the PC resin and added colorants. This change in lens color has been shown to affect blue light cutting performance.

[0006] Photodegradation and color change can be reduced or prevented by including additives that provide appropriate protection. There is an industry need for clear ophthalmic grade lenses that provide protection against blue light. Because color change is more noticeable in clear lenses, it is important to incorporate an additive package that minimizes color change during lens production and provides long-term photoprotection for the lens components. Summary of the invention

[0007] One object of the present disclosure is to provide a polycarbonate resin for a transparent lens that provides a blue light blocking function or blue light cut-off performance comparable to that of a sunglass lens. The inclusion of a blue light cut-off function in a transparent lens will help protect prescription eyeglass wearers from phototoxic blue light. In some embodiments, the polycarbonate resin includes a UV absorber. To counteract the yellow tint imparted by the UV absorber, a colorant may be added to the polycarbonate resin.

[0008] Polycarbonate resins may include other additives such as antioxidants and light stabilizers in order to produce lenses with consistent color. Therefore, one object of the present disclosure is to provide an additive package that is incorporated into a base PC resin with a 400nm UV cutoff to protect the resin during processing and minimize color changes in the resulting lenses. Another object of the present disclosure is to have the proposed additive package further protect the lenses from color changes due to photodegradation. The additives and resin formulations disclosed in the present invention are used to produce clear lenses with consistent color and constant blue light cutoff performance during use.

[0009] Provided herein is a high blue light cut-off performance polycarbonate resin composition for transparent lenses. In some embodiments, the transparent lens is a tinted or untinted lens with a light transmittance of 80% or more to 100% in the visible spectrum. In some embodiments, the polycarbonate resin composition comprises a polycarbonate polymer, a UV absorber, a colorant additive, and a light stabilizer. In some aspects, the polycarbonate polymer is a base resin. In other embodiments, the base resin comprises a polycarbonate polymer and a UV absorber. In some aspects, the base resin blocks more than 99% of the light with a wavelength less than 400nm at each wavelength in the wavelength range of 315-400nm, and partially blocks the blue light in the range of 400-500nm. In some aspects, the resin composition blocks more than 99% of the light with a wavelength less than 400nm at each wavelength in the wavelength range of 315-400nm, and partially blocks the blue light in the range of 400-500nm. In some embodiments, the polycarbonate polymer has a weight average molecular weight in the range of from about 20,000g / mol to about 40,000g / mol.

[0010] UV absorbers are often incorporated into optical articles to reduce or prevent ultraviolet light from reaching the retina (particularly in ophthalmic lens materials). In addition, UV absorbers protect the substrate material from the effects of UV light, thereby preventing it from weathering and becoming brittle and / or yellowing. In some aspects, the UV absorber is preferably capable of at least partially blocking light having a wavelength shorter than 400nm, preferably less than a UV wavelength of 385nm or 390nm, but also has an absorption spectrum extending to the visible blue light range (400-500nm). Most preferred ultraviolet light absorbers have a maximum absorption peak in the range from 350nm to 370nm, and / or do not absorb light in the range of 465-495nm, preferably in the range of 450-550nm.

[0011] In some aspects, the polycarbonate resin UV absorber is a benzotriazole absorber. Suitable UV absorbers include, but are not limited to, 2-(2-hydroxyphenyl)-benzotriazoles, such as 2-(2-hydroxy-3-tert-butyl-5-methylphenyl)chlorobenzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-(3'-methallyl-2'-hydroxy-5'-methylphenyl)benzotriazole, or other allylhydroxymethylphenylbenzotriazoles, 2-(3,5-di-tert-amyl-2-hydroxyphenyl)benzotriazole, and 2-hydroxy-5-acryloxyphenyl-2H-benzotriazole disclosed in U.S. Pat. No. 4,528,311, and BASF Corporation (BASF) Preferred absorbents belong to the benzotriazole family. Commercially available products include Tinuvin 326 from BASF, Seeseorb 703 from Cipro, Viosorb 550 from Kyodo Chemicals, and Kemisorb 73 from Chemipro. In a specific aspect, the UV absorber is 2-(5-chloro-2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methylphenol. In some embodiments, the polycarbonate resin comprises 0.05% to 1% by weight of the UV absorber.

[0012] In some aspects, polycarbonate resin includes colorant additive. Suitable colorant additive can be selected from: azo dye, polymethine dye, arylmethine dye, polyene dye, anthracene dione dye, pyrazolone dye, anthraquinone dye, amino porphyrinone (auinophtalone) dye and carbonyl dye. In some aspects, polycarbonate resin colorant additive is blue dye, purple dye, red dye or any combination thereof. In certain embodiments, blue dye is anthraquinone dye. In other aspects, blue dye is 1,4-bis (2,6-dibromo-4-methylphenylamino) anthracene -9,10- dione.

[0013] In some aspects, the resin composition comprises at least one hindered amine light stabilizer, and / or at least one antioxidant, more preferably at least one hindered amine light stabilizer and at least one antioxidant. This free radical scavenger combination provides the best protection against thermal and photodegradation for the filter means. The protection of the filter means against photodegradation can also be enhanced by the presence of an anti-reflective coating comprising at least one mineral / dielectric layer on the optical article.

[0014] In some embodiments, the polycarbonate resin further comprises an antioxidant or a heat stabilizer. Preferred antioxidants are sterically hindered phenols, phenylpropionic acid esters, thioethers or phosphites. In other embodiments, the antioxidant is phenylpropionic acid ester. In a specific embodiment, the antioxidant is phenylpropionic acid ester, i.e., 3 (1,1-dimethylethyl) -4-hydroxy-5-methyl-1,1'-[1,2-ethanediylbis (oxy-2,1-ethanediyl)] ester. In some embodiments, 0.05% to 1% by weight of an antioxidant is added to the polycarbonate resin.

[0015] In some aspects, the polycarbonate resin may further comprise a light stabilizer. In some embodiments, the light stabilizer is a hindered amine light stabilizer. In other aspects, the hindered amine light stabilizer is bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butyl malonate. In some embodiments, 0.05% to 1% by weight of the light stabilizer is added to the polycarbonate resin. In additional aspects, the resin may further comprise a selective blue light blocking filter, also referred to herein as a selective filter.

[0016] In further embodiments, the presently disclosed resins are used to produce a transparent lens having a D65 transmittance greater than 85% for a 1.1 mm thick lens. In some embodiments, the BVC(B') value of the lens comprising the presently disclosed resin composition is ≥15%, preferably ≥18%, more preferably ≥20%. In additional embodiments, the transparent lens may further include at least one wafer overmold for increasing at least one of blue light cutoff performance, color balance, and lens clarity.

[0017] In another embodiment, a method for producing a transparent lens with improved optical properties and / or degradation resistance from a base resin is disclosed. In some embodiments, the base resin is a commercially available blue light cut-off performance resin that includes a UV absorber. In some embodiments, the base resin is Panlite L-1250VX PC resin from Teijin, Makrolon LQ3187 from Bayer, or Lexan OQ4120, OQ4320, OQ4320R, OQ4620, or OQ4620R from Sabic. In some aspects, the base resin comprises a polycarbonate polymer and a UV absorber. The base resin is typically used in the sunglass and visor markets, and a UV blocker may be included in the resin composition. In some aspects, a method for producing a transparent lens with improved optical properties and / or degradation resistance comprises the following steps: obtaining a base resin, and adding one or more additives selected from the group consisting of: a colorant additive, an antioxidant, a light stabilizer, and a selective blue light blocking filter. In some aspects, additional or supplemental UV blockers are added to the base resin.In some embodiments, the base resin blocks greater than 99% of light having a wavelength less than 400 nm at each wavelength within the wavelength range of 315-400 nm.

[0018] In some embodiments, a benzotriazole UV absorber is added to the base resin. Suitable UV absorbers include, but are not limited to, 2-(2-hydroxyphenyl)-benzotriazoles, such as 2-(2-hydroxy-3-tert-butyl-5-methylphenyl)chlorobenzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-(3'-methallyl-2'-hydroxy-5'-methylphenyl)benzotriazole, or other allylhydroxymethylphenylbenzotriazoles, 2-(3,5-di-tert-amyl-2-hydroxyphenyl)benzotriazole, and 2-hydroxy-5-acryloyloxyphenyl-2H-benzotriazole disclosed in U.S. Pat. No. 4,528,311 and BASF Corporation (BASF) Preferred absorbents belong to the benzotriazole family. Commercially available products include Tinuvin 326 from BASF, Seeseorb 703 from Cipro, Viosorb 550 from Kyodo Chemicals, and Kemisorb 73 from Chemipro. In a specific aspect, the UV absorber is 2-(5-chloro-2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methylphenol. In some embodiments, 0.05% to 1% by weight of the UV absorber is added to the base resin.

[0019] In some aspects, at least one colorant additive is added to the base resin. Suitable colorant additives can be selected from: azo dyes, polymethine dyes, arylmethine dyes, polyene dyes, anthracene dione dyes, pyrazolone dyes, anthraquinone dyes, aminoprenophthalone (auinophtalone) dyes and carbonyl dyes. In some aspects, a blue dye colorant additive is added to the base resin. In some aspects, the polycarbonate resin colorant additive is a blue dye, a purple dye, a red dye or any combination thereof. In certain embodiments, the blue dye is an anthraquinone dye. In other aspects, the blue dye is 1,4-bis (2,6-dibromo-4-methylphenylamino) anthracene-9,10-dione. In certain embodiments, 0.1ppm to 20ppm of dye is added to the base resin. In a preferred embodiment, 5ppm to 10ppm of dye is added to the base resin.

[0020] In some embodiments, an antioxidant or a heat stabilizer is added to the base resin. Preferred antioxidants are phenylpropionate, sterically hindered phenol, thioether or phosphite. In other embodiments, the antioxidant is a phenylpropionate. In a specific embodiment, the antioxidant is a phenylpropionate, i.e., 3 (1,1-dimethylethyl) -4-hydroxy-5-methyl-1,1'- [1,2-ethanediyl bis (oxy-2,1-ethanediyl)] ester. In some embodiments, 0.05% to 1% by weight of an antioxidant is added to the base resin.

[0021] In some aspects, a light stabilizer is added to the base resin. In some embodiments, the light stabilizer is a hindered amine light stabilizer. Preferred hindered amine light stabilizers are derivatives of piperidine, such as derivatives of 2,2,6,6-tetramethylpiperidine. In other aspects, the hindered amine light stabilizer is bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butyl malonate. In some embodiments, 0.05% to 1% by weight of the light stabilizer is added to the base resin.

[0022] In some aspects, the resin composition further comprises at least one selective filter. The selective filter selectively inhibits / blocks the transmission of light within the selected wavelength range, and the wavelength range is selected in the range of 400-500nm, preferably in the range of 400-460nm. In some aspects, the selective filter has little or no effect on the transmission of wavelengths outside the selected wavelength range unless it is explicitly configured for this. The bandwidth of the selected range can preferably be in the range of from 10 to 70nm, preferably from 10 to 60nm, and more preferably from 20 to 50nm. In some embodiments, the selective filter preferably blocks or intercepts at least 5%, preferably at least 8%, and more preferably at least 12% of the light within the selected wavelength range. The phrase "blocking X%" of the incident light within the specified wavelength range does not necessarily mean that some wavelengths within the range are completely blocked, although this is possible. Instead, "blocking X%" of the incident light within the specified wavelength range means that an average of X% of the light within the range is not transmitted. As used herein, the light blocked in this way is light that reaches that main face (generally the front main face) of the optical article on which the layer comprising at least one filtering means is deposited.

[0023] In some aspects, the selective filter is a notch filter. Preferably, the selective filter is an absorbing dye that at least partially absorbs light in the wavelength range of 400-500 nm, preferably in the wavelength range of 400-460 nm. The chemical nature of the absorbing dye that acts as a filter for at least partially suppressing light having a selected wavelength range is not particularly limited, as long as the absorbing dye acts as a selective filter. The blue light blocking dye (typically a yellow dye) is preferably selected to absorb little or no absorption in other parts of the visible spectrum to minimize the appearance of other colors.

[0024] Porphyrins are well-known macrocyclic compounds consisting of four modified pyrrole subunits interconnected at their carbon atoms by methine bridges. The parent porphyrin is porphin and substituted porphins are called porphyrins. Porphyrins are ligand conjugate acids that bind various metals to form (coordination) complexes.

[0025] Certain porphyrins or porphyrin complexes or derivatives are interesting in that they provide selective absorption filters with a bandwidth of, for example, 20 nm in some cases, in a selected blue light wavelength range. The selective properties are provided in part by the symmetry of the molecule. This selectivity helps to limit distortion of the visual perception of color, limit adverse filtering effects on dark vision, and limit effects on circadian rhythms.

[0026] For example, one or more porphyrins or porphyrin complexes or derivatives are selected from the group consisting of: chlorophyll a; chlorophyll b; 5,10,15,20-tetrakis(4-sulfonylphenyl)porphyrin sodium salt complex; 5,10,15,20-tetrakis(N-alkyl-4-pyridyl)porphyrin complex; 5,10,15,20-tetrakis(N-alkyl-3-pyridyl)porphyrin complex; and 5,10,15,20-tetrakis(N-alkyl-2-pyridyl)porphyrin complex, wherein the alkyl group is preferably a linear or branched alkyl chain, each chain containing 1 to 4 carbon atoms. For example, the alkyl group may be selected from the group consisting of methyl, ethyl, butyl and propyl.

[0027] The complex is typically a metal complex, the metal being selected from the group consisting of Cu cations, Cr(III), Ag(II), In(III), Mn(III), Sn(IV), Fe(III), Co(II), Mg(II) and Zn(II). Cr(III), Ag(II), In(III), Mn(III), Sn(IV), Fe(III), Co(II) and Zn(II) show absorption in water in the range of 425nm to 448nm, with a steep absorption peak. In addition, the complexes they provide are stable and insensitive to acid. In particular, Cr(III), Ag(II), In(III), Sn(IV), Fe(III) do not exhibit fluorescence at room temperature.

[0028] In some embodiments, the base resin is used to produce a lens having a BVC(B') value ≥ 20%. In other embodiments, the base resin is used to produce a transparent lens having a D65 transmittance greater than 85% for a 1.1 mm lens. In some embodiments, the resin composition is used to produce a lens having a BVC(B') value ≥ 20%. In other embodiments, the resin composition is used to produce a transparent lens having a D65 transmittance greater than 85% for a 1.1 mm lens. In additional embodiments, the transparent lens may further include at least one wafer overmold for increasing at least one of blue light cutoff performance, color balance, and lens clarity.

[0029] Any embodiment of any disclosed composition and / or method may consist of or consist essentially of - rather than comprise / include / contain / have any of the described elements and / or features and / or steps. Thus, in any claim, the term "consisting of" or "consisting essentially of" may replace any open-ended linking verb described above in order to alter the scope of a given claim from what it would otherwise be using the open-ended linking verb.

[0030] The term "substantially" and variations thereof are defined as to be largely but not necessarily entirely as understood by one of ordinary skill in the art to be specified, and in a non-limiting embodiment substantially refers to within 10%, within 5%, within 1%, or within 0.5%.

[0031] "Analogue" and "analog", when referring to a compound, refers to a modified compound in which one or more atoms have been substituted with other atoms, or in which one or more atoms have been deleted from the compound, or in which one or more atoms have been added to the compound, or any combination of such modifications. Such additions, deletions, or substitutions of atoms may occur at any point, or multiple points, along the primary structure comprising the compound.

[0032] "Derivatives" referring to a parent compound refer to a chemically modified parent compound or an analog thereof, wherein at least one substituent is not present in the parent compound or an analog thereof. One such non-limiting example is a parent compound that has been covalently modified. Typical modifications are amines, carbohydrates, alkyl groups, acyl groups, esters, pegylation, and the like.

[0033] The terms "about" or "approximately" or "substantially unchanged" are defined as close to what is understood by one of ordinary skill in the art, and in one non-limiting embodiment, these terms are defined as within 10%, preferably within 5%, more preferably within 1%, and most preferably within 0.5%.

[0034] When used in conjunction with the term "comprising" in the claims and / or description, the word "a / an" may mean "one / an", but also has the meaning of "one / a or more / multiple", "at least one / an" and "one / a or more than one / an".

[0035] As used in this specification and one or more claims, the words “comprising” (and any forms of comprising, such as “comprise” and “comprises”), “having” (and any forms of having, such as “have” and “has”), “including” (and any forms of including, such as “includes” and “include”), or “containing” (and any forms of containing, such as “contains” and “contain”) are inclusive or open-ended and do not exclude additional, undescribed elements or method steps.

[0036] The compositions and methods for their use may "comprise," "consist essentially of," or "consist of" any ingredient or step disclosed throughout the specification. With respect to the transition phrase "consist essentially of," in one non-limiting aspect, the basic and novel features of the compositions and methods disclosed in this specification include the ability of the compositions to block or reduce blue light transmission through optical articles.

[0037] Other objects, features and advantages of the present invention will become apparent from the following detailed description. However, it should be understood that the detailed description and examples, although indicating specific embodiments of the present invention, are given by way of illustration only. In addition, it is expected that changes and modifications within the spirit and scope of the present invention will become apparent to those skilled in the art from the detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a graph depicting the yellowness index (YI) and BVC (B') of a series of lenses formed by injection molding of commercial polycarbonate resins. The upward drift of YI and the evolution of BVC (B') demonstrate the inadequacy of commercial PC resins with 400nm UV cutoff in maintaining color stability and blue light cutoff performance during injection molding.

[0039] Figure 2 is a graph depicting the transmission spectrum of one embodiment of a blue light cut-off polycarbonate resin lens. DETAILED DESCRIPTION

[0040] The various features and advantageous details are explained more fully with reference to the non-limiting embodiments shown in the drawings and detailed in the following description. However, it should be understood that the detailed description and specific examples, while indicating embodiments, are given by way of illustration only and not by way of limitation. Various substitutions, modifications, additions and / or rearrangements will be apparent to those of ordinary skill in the art in light of this disclosure.

[0041] In the following description, numerous specific details are provided to provide a thorough understanding of the disclosed embodiments. However, one of ordinary skill in the relevant art will recognize that the invention may be practiced without one or more of the specific details or with other methods, components, materials, etc. In other cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

[0042] Disclosed herein is a method for improving the color stability of existing polycarbonate resins during processing and lenses made therefrom. More specifically, a combination of various additives, including UV blockers, antioxidants, light stabilizers such as hindered amine light stabilizers, and colorants, can be added to a polycarbonate base resin before being formed into an optical lens. The resulting lens exhibits consistent color and significant blue light cutoff performance. The modified resin formulation can be used to produce transparent lenses, helping to protect prescription eyeglass wearers from phototoxic blue light.

[0043] The blue light cutoff of a lens is typically defined by:

[0044] Blue light cutoff rate (%) = 100-T sb

[0045]

[0046] in

[0047] T(λ): Transmittance (%), interval is 5nm

[0048] E sλ (λ): Solar spectral irradiance (ISO 8980-3: Appendix B)

[0049] B(λ): Blue light hazard function (ISO 8980-3: Annex B)

[0050] The experimental and observational results disclosed herein support a blue cutoff performance metric characterized by:

[0051]

[0052] or

[0053]

[0054] in

[0055] T(λ): Transmittance (%), interval is 10nm

[0056] B'(λ): Blue light hazard function (Arnault et al., PlosOne, 2013)

[0057] B(λ): Blue light hazard function (ISO 8980-3: Annex B)

[0058] The blue light cutting performance of a lens is a function of the transmittance T(λ), which is directly related to the color appearance of the lens corresponding to a specific transmission spectrum. Therefore, it is important for the lens to have a consistent and stable color to achieve constant blue light cutting performance.

[0059] Insufficient protection against heat and oxidation during the lens injection molding process may result in lens color change. A typical indicator of lens color change is the continuous evolution of the Yellowness Index (YI) from lens to lens ( Figure 1 ). Lens color can also change due to photodegradation of the base PC resin and component additives and colorants. An increase in YI during the production of successive lenses indicates that heat and / or oxidation are adversely affecting lens quality.

[0060] To enhance the protection of commercial PC resins with a 400nm UV cutoff from degradation / oxidation due to high heat, antioxidants or heat stabilizers such as phenylpropionic acid can be added to the base PC resin. 3(1,1-Dimethylethyl)-4-hydroxy-5-methyl-1,1'-[1,2-ethanediylbis(oxy-2,1-ethanediyl)]ester is a product manufactured by the Ciba division of BASF under the name 245. In some embodiments, 0.05% to 1% by weight of phenylpropionic acid is added. In order to reduce or prevent the photodegradation of the resulting lens, a light stabilizer can be added to the base PC resin. In some embodiments, the light stabilizer bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butyl malonate can be added to the base PC resin. This compound can be used as 144 is commercially available and sold by the Ciba division of BASF. In some aspects, 0.05% to 1% by weight of a light stabilizer is added to the resin.

[0061] Experimental Section Injection Molding of Commercial PC Resin

[0062] A 1.50B SFSV lens using Teijin's Panlite L-1250VX PC resin with a 400nm UV cutoff was injection molded using a Nissei FN4000 injection molding machine with the following process parameters:

[0063] Melting Temperature: 515F

[0064] Mold temperature: 270F

[0065] Screw speed: 15rpm

[0066] Injection speed: 6%

[0067] Packing pressure: 1220psi

[0068] Packing time: 10s

[0069] Cooldown: 250s

[0070] Figure 1 The graph depicted in FIG shows the YI and BVC (B') data of the resulting comparative lenses. Figure 1 As shown, the upward shift of YI and the evolution of BVC(B') are evident, which clearly demonstrates the inadequacy of commercial PC resin with 400 nm UV cutoff in maintaining color stability and blue light cutoff performance during injection molding.

[0071] According to the present invention, before forming an optical lens, a combination of various additives (including UV blockers, antioxidants, light stabilizers such as hindered amine light stabilizers, and colorants) can be added to the above-mentioned polycarbonate base resin to maintain color stability and blue light cutting performance during injection molding and produce transparent blue light cutting performance lenses with stable color.

[0072] The claims should not be interpreted as including means-plus-function or step-plus-function limitations unless such limitations are explicitly recited in a given claim using the phrases "means for" or "step for," respectively.

Claims

1. A polycarbonate resin composition with high blue light cutoff performance for transparent lenses, comprising: Polycarbonate polymers; UV absorbers; Colorant additives; Antioxidants; as well as Hindered amine light stabilizers; The resin blocks more than 99% of light having a wavelength less than 400 nm at each wavelength within the wavelength range of 315-400 nm, and partially blocks blue light within the range of 400-500 nm.

2. The polycarbonate resin composition according to claim 1, wherein The weight average molecular weight of the polycarbonate polymer is in the range of from about 20,000 g / mol to about 40,000 g / mol.

3. The polycarbonate resin composition according to claim 1 or 2, wherein The UV absorber is a benzotriazole absorber.

4. The polycarbonate resin composition according to claim 3, wherein The UV absorber is 2-(5-chloro-2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methylphenol.

5. The polycarbonate resin composition according to any one of claims 1 to 4, wherein The colorant additive is a blue dye, a violet dye, a red dye or any combination thereof.

6. The polycarbonate resin composition according to claim 5, wherein The colorant additive is 1,4-bis(2,6-dibromo-4-methylphenylamino)anthracene-9,10-dione.

7. The polycarbonate resin composition according to any one of claims 1 to 6, wherein The antioxidant is phenylpropionate.

8. The polycarbonate resin composition according to claim 7, wherein The antioxidant is phenylpropionic acid, namely 3(1,1-dimethylethyl)-4-hydroxy-5-methyl-1,1'-[1,2-ethanediylbis(oxy-2,1-ethanediyl)]ester.

9. The polycarbonate resin composition according to any one of claims 1 to 8, wherein The hindered amine light stabilizer is bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butyl malonate.

10. The polycarbonate resin composition according to any one of claims 1 to 9, wherein The resin further comprises a selective blue light blocking filter.

11. The polycarbonate resin composition according to claim 10, wherein The selective blue light blocking filter at least partially blocks blue light within a wavelength range selected within the range of 400-460 nm.

12. Use of the polycarbonate resin composition according to claim 1 in a transparent lens, wherein: The D65 transmission of a 1.1mm thick lens is greater than 85%.

13. The use of the transparent lens according to claim 12, wherein: The lens comprises a BVC(B') value of ≥ 20%.

14. The use of the transparent lens according to claim 13, wherein: The lens further includes a wafer overmold for increasing at least one of blue light cutting performance, color balance, and lens clarity.

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