WO2018080097A2

WO2018080097A2 - Polycarbonate resin composition, and optical molded product composed of same

Info

Publication number: WO2018080097A2
Application number: PCT/KR2017/011539
Authority: WO
Inventors: 전병규; 고운; 손영욱; 홍무호; 반형민; 고태윤
Original assignee: 주식회사 엘지화학
Priority date: 2016-10-31
Filing date: 2017-10-18
Publication date: 2018-05-03
Also published as: WO2018080097A3

Abstract

The present invention relates to a polycarbonate resin composition and an optical molded product composed of the same. The polycarbonate resin composition according to the present invention has excellent transmissivity and color stability. Thus, high transparency can be achieved, and the stability of a polycarbonate resin can be improved.

Description

[Name of invention]

Polycarbonate resin composition and optical molded article consisting thereof

Technical Field

Cross Citation with Related Application (s)

This application claims the benefit of priority based on Korean Patent Application No. 10-2016-0142889 dated October 31, 2016 and Korean Patent Application No. 10-2017-0134732 dated October 17, 2017. All content disclosed in the literature is included as part of this specification.

The present invention relates to a polycarbonate resin composition and an optical molded article comprising the same, which are excellent in transmittance and color stability, which can secure high transparency, and which can increase the stability of a polycarbonate resin.

[Background of invention.

Recently, as the liquid crystal display device becomes thinner and larger, the thickness of the components used therein is getting thinner and thinner. The liquid crystal display is equipped with a backlight, which is a light emitting part that emits light behind the LCD, and a light guide plate or a diffuser plate is used to diffuse or transmit light depending on the type of light source. The light guide plate is also getting thinner according to the recent trend, and the general level of the light guide plate actually used is about 0.5 mm in thickness, but the thinnest is about 0.3 mm and the thickness is going to become thinner in the future.

In accordance with the trend of thinning, the use of edge type backlight units equipped with LEDs at the corners of the backlight is increasing instead of the conventional cold cathode fluorescent lamps (CCFL). In the edge type backlight unit, the light from the light source mounted at the corner portion is transmitted through the light guide plate, and a part of the light transmitted through the plate is scattered by the light scattering layer applied to the surface of the plate, so that the entire surface of the surface uniformly emits light. This will illuminate the liquid crystal display. The light scattering layer is formed by transferring or printing a dot pattern on the surface of the light guide plate, and recently, transfers a prism structure having a fine structure in order to increase light efficiency.

Since the light guide plate needs high light transmittance, PMMA, which is an acrylic resin, has been generally used as a material of the light guide plate. Acrylic resin Although it has a high light transmittance, it is not suitable for applying to a thin light guide plate due to lack of mechanical strength, and has a disadvantage of being vulnerable to heat generated in an electronic device due to lack of heat resistance.

Polycarbonate has attracted attention in place of such acrylic resins. Polycarbonate can be used as a material of a thin light guide plate because of its excellent mechanical strength compared to acrylic resin, and has excellent heat resistance and flame retardancy, and is gradually replacing acrylic resin in LED-based backlight units and lighting apparatuses with high heat generation. However, since the polycarbonate has a lower total light transmittance than the acrylic resin, it is required to have a light transmittance comparable to the acrylic resin while maintaining the advantages of the polycarbonate.

In this regard, Japanese Patent Laid-Open No. 2008-045131 discloses a ΡΜΜΑ having a viscosity average molecular weight (Mv) of 20, 000 to 60,000 in an acrylic resin and a polycarbonate having a Μν of 15, 000 to 40,000. The formulation in the range of 0.3 phr has suggested excellent photoconductivity. However, physical properties such as optical properties still need to be improved.

[Content of invention]

Problem to be solved

An object of the present invention is to provide a polycarbonate resin composition which is excellent in transmittance and color stability and can secure high transparency and can improve stability of a polycarbonate resin.

Moreover, this invention is providing the optical molded article which consists of the said resin composition.

[Measures of problem]

In order to solve the above problem, Polycarbonate; Cyclic phosphite ester compounds; Linear phosphite ester compounds; Vinyl polymers including (meth) acrylate repeating units containing epoxy functional groups; And a photoreactive compound including a phenylene functional group, and a content of the linear phosphite ester compound based on 100 parts by weight of the cyclic phosphite ester compound is 40 parts by weight to 90 parts by weight. In addition, the present invention can provide an optical molded article comprising the polycarbonate resin composition.

Hereinafter, a polycarbonate resin composition and a molded article thereof according to a specific embodiment of the present invention will be described in detail. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise", "comprise" or "having" are intended to indicate that there is a feature, step, component, or combination thereof, and one or more other features or steps, It should be understood that the presence or addition of components or combinations thereof is not considered in advance.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated and described in detail below. However, the present invention is not intended to be limited to the specific embodiments disclosed herein. It is to be understood that all changes, equivalents, and substitutes included in the spirit and scope of the invention are included. Cyclic phosphite ester compound

The polycarbonate resin composition of one embodiment may include a cyclic phosphite ester compound. As the polycarbonate resin composition includes the above-described cyclic phosphite ester compound, the oxidation resistance of the polycarbonate resin composition may be increased, and color stability of the initial product may be secured to implement transparency of the polycarbonate resin composition. have.

The phosphite te ester compound is a compound in which an organic functional group is bonded to an oxygen atom included in a phosphite functional group and has a tricyclic structure. The cyclic structure includes a phosphorus (P) atom and an oxygen (0) atom included in a phosphite functional group in the phosphite ester compound. It may be formed through a chemical bond between three or more atoms including, and the number of rings is not limited.

Specifically, the cyclic phosphite ester compound may include two phosphite functional groups and a tetravalent organic functional group bonded to the two phosphite functional groups. Two oxygen atoms of the three oxygen atoms included in the phosphite functional group are respectively bonded to two working points included in the tetravalent organic functional group, and two oxygen atoms of the three oxygen atoms included in the other phosphite functional group are each It may bind to the remaining two functional points contained in the tetravalent organic functional group.

As described above, the tetravalent organic functional group may include four functional points (or radicals) capable of forming a bond with the oxygen atom included in the phosphite functional group. Simultaneous bonds can be formed.

More specifically, the cyclic phosphite ester compound may be represented by the following formula (1).

[Formula 1]

In Formula 1 above. ^ Is a tetravalent organic functional group, and ¾ is the same or different, and is each independently an aryl group having 6 to 40 carbon atoms.

Although the specific examples of the tetravalent organic functional group described above are not large, it may be preferably represented by the following Chemical Formula 1-1. [Formula 1-1]

In Formula 1-1, "*" means a point of attachment (or point of action). Meanwhile, the aryl group having 6 to 40 carbon atoms is a monovalent functional group derived from arene, and may be, for example, monocyclic or polycyclic. Specifically, the monocyclic aryl group may be a phenyl group, biphenyl group, terphenyl group, stilbenyl group and the like, but is not limited thereto. The polycyclic aryl group may be naphthyl group, anthryl group, phenanthryl group, pyrenyl group, perrylenyl group, chrysenyl group, fluorenyl group, or the like, but is not limited thereto. At least one hydrogen atom of the aryl group may be substituted with another substituent, and examples of the substituent include an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, and an aryl having 6 to 12 carbon atoms. Group, C2-C12 heteroaryl group, C6-C12 arylalkyl group, halogen atom, cyano group, amino group, amidino group, nitro group, amide group, carbonyl group, hydroxy group, sulfonyl group, carbamate group, carbon number 1-10 alkoxy groups etc. are mentioned.

More preferably, a 2, 6- di-tert- butyl- 4-methylphenyl group can be mentioned as said C6-C40 aryl group. Specific of the compound represented by the formula (1). Examples include bis (2, 6-di-tert butyl-4-methylphenyl) pentaeryri-di-phosphite [PEP36].

Linear phosphite ester compounds

The polycarbonate resin composition of one embodiment may include a linear phosphite ester compound. As the polycarbonate resin composition includes the above-described linear phosphite ester compound, not only the antioxidant power of the polycarbonate resin composition may be increased, but the stability of the polycarbonate resin may be increased.

In particular, the linear phosphite cester compound does not advance side reactions upon addition of water, thereby inhibiting decomposition of the polycarbonate resin by by-products such as acidic substances. In addition, the linear phosphite ester compound can suppress the clouding phenomenon in the process of manufacturing the optical molded article can increase the transparency of the polycarbonate resin composition and the molded article using the same.

Therefore, when the linear phosphite ester compound is mixed with the cyclic phosphite ester compound in a specific ratio, While maintaining the oxidation resistance of the polycarbonate resin composition above a certain level, it is possible to maintain the color tone in an appropriate range to secure transparency, minimize the decomposition of the polycarbonate resin, and also minimize the clouding phenomenon of the polycarbonate resin composition You can implement the effect.

The phosphite te ester compound is a compound in which an organic functional group is bonded to an oxygen atom included in a phosphite functional group, and has a linear structure. The linear structure is a concept opposite to a cyclic structure, and is a non-ring through a chemical bond between three or more atoms including a phosphorus (P) atom and an oxygen (0) atom included in a phosphite functional group in the phosphite ester compound. It can form a straight line.

Specifically, the linear phosphite ester compound may include a phosphite functional group and an aryl group having 6 to 40 carbon atoms bonded to the phosphite functional group. The aryl group having 6 to 40 carbon atoms may be bonded to each of three oxygen atoms included in the phosphite functional group.

The aryl group having 6 to 40 carbon atoms is derived from arene.

Monovalent functional groups can be, for example, monocyclic or polycyclic. Specifically, the monocyclic aryl group may be a phenyl group, biphenyl group, terphenyl group, stilbenyl group and the like, but is not limited thereto. The polycyclic aryl group may be naphthyl group, anthryl group, phenanthryl group, pyrenyl group, perylenyl group, chrysenyl group, fluorenyl group and the like, but is not limited thereto. At least one hydrogen atom of the aryl group may be substituted with another substituent, and examples of the substituent include an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, and having 6 to 12 carbon atoms. An aryl group, a C2-C12 heteroaryl group, a C6-C12 arylalkyl group, a halogen atom, a cyano group. Amino group. Amidino group, nitro group, amide group carbonyl group. A hydroxyl group, a sulfonyl group, a carbamate group, a C1-C10 alkoxy group, etc. are mentioned.

More specifically, the linear phosphite ester compound may be represented by the following formula (2).

[Formula 2] R ₃

o

In Formula 2, R ₃ , R ₄ and R ₅ are the same or different, and each independently represent an aryl group having 6 to 40 carbon atoms.

More preferably, a 2, 4-di-tert- butylphenyl group is mentioned as said C6-C40 aryl group. Specific examples of the compound represented by Formula 2 include tris (2,4-di-t-butylphenyl) phosphite [P—168]. Epoxy group-containing burnyl polymer

On the other hand, the polycarbonate is relatively excellent in mechanical properties, electrical properties and weather resistance compared to other types of resins, it is necessary to improve this because of the low light transparency and color stability as an optical molded article. Thus, the polycarbonate is used together with a vinyl-based polymer including a (meth) di-acryl.late repeating unit containing an epoxy functional group.

The term '(meth) acryl' used in the present invention means acryl and methacryl. That is, the (meth) acrylate ^is, be understood to mean acrylate or methacrylate.

In addition, the vinyl polymer including the (meth) acrylate repeating unit including the epoxy functional group preferably has a weight average molecular weight of 1,000 g / mol to 10,000 g / mol. In the above range, the physical properties of the polycarbonate composition can be improved effectively. The weight average molecular weight means the weight average molecular weight of polystyrene conversion measured by GPC method. In the process of measuring the weight average molecular weight of polystyrene conversion measured by the GPC method, a detector and an analytical column such as a commonly known analytical device and a differential refractive index detector (Refractive Index Detector) may be used, Temperature conditions. Solvent, f low rate can be applied. Of the above measurement conditions Specific examples include a temperature of 30 ^° C, a chloroform solvent (Chloroform) and f low rat e of 1 mL / min.

Specifically, the epoxy group-containing vinyl polymer may include a (meth) acrylate repeating unit including an epoxy functional group, wherein the epoxy functional group in the (meth) acrylate repeating unit including the epoxy functional group is a (meth) acrylate It may bind to the branched chain end of the repeating unit. The (meth) acrylate repeating unit may include a main chain formed through polymerization between vinyl-based functional groups and a branched chain extending in a branch shape from the main chain. The epoxy functional group may form a bond at the terminal of the branched chain of the (meth) acrylate repeating unit.

More specifically, the (meth) acrylate repeating unit including the epoxy functional group may include a repeating unit represented by Formula 3 below.

[Formula 3]

0

In Formula 3, R _n , Ri ₂ and R ₁₃ are hydrogen or a straight or branched chain alkyl group having 1 to 10 carbon atoms, R ₁₄ is a straight or branched chain alkylene group having 1 to 10 carbon atoms, X is 1 to It is an integer of 20.

The alkyl group is a monovalent functional group derived from an alkane, for example, linear, branched or cyclic, methyl, ethyl, propyl. Isobutyl, sec-butyl, tert-butyl, pentyl, nuclear chamber and the like. The alkylene group is a divalent functional group derived from alkane, for example, linear, branched or cyclic, such as methylene group, ethylene group, propylene group, It may be an isobutylene group, a sec-butylene group, a tert-butylene group, a pentylene group, a nuclear styrene group, etc.

The alkyl group or alkylene group may be substituted or unsubstituted, and 'substituted' means that a hydrogen atom included in the alkyl group or the alkylene group is replaced with a specific functional group. Examples of the substituted functional group are not particularly limited, and various conventionally known functional groups or atomic groups, for example, halogen, hydroxy group, amino group and the like can be used without limitation.

In addition, the epoxy group-containing vinyl polymer may have an epoxy equivalent weight of 100 g / mol to 500 g / mol, or 200 g / mol to 400 g / mol. As such, the epoxy group-containing vinyl-based polymer includes a specific content of the epoxy functional group, so that excellent long light transparency and color stability can be maintained.

The epoxy group-containing vinyl polymer may further include an aromatic vinyl repeating unit or a (meth) acrylic repeating unit. The aromatic vinyl repeating unit means a repeating unit derived from an aromatic vinylic monomer, and specifically means a repeating unit constituting a polymer formed through polymerization between aromatic vinylic monomers, ie, the epoxy group-containing vinyl. The system polymer may be, for example, a (meth) acrylate repeating unit including an epoxy functional group; Aromatic vinyl repeating units; And it may include a copolymer comprising one or more repeating units selected from the group consisting of (meth) acrylic repeating units.

The aromatic vinyl monomer is a compound having one vinyl double bond and one or more benzene nuclei in the same molecule, and specific examples of the aromatic vinyl monomer are not particularly limited. For example, styrene, alpha-methylstyrene, 2 -Methylstyrene, 3-methylstyrene, 4-methylstyrene, 4-ethylstyrene, t-butylstyrene, 2, 5-dimethylstyrene, 1, 3-dimethylstyrene. 2,4-Dimethylstyrene, 4-methoxystyrene, 4-ethoxystyrene, 4-propoxystyrene, 4-butoxystyrene, chlorostyrene, dichlorostyrene, trichlorostyrene, vinylluene, bromostyrene, dibro And compounds such as mostyrene, tribromostyrene, vinyl naphthalene, isopropenyl naphthalene, isopropenyl biphenyl, divinylbenzene, alpha-methylstyrene vinylluene and the like. More specifically, the aromatic vinyl-based repeating unit represented by the following formula (4) may be included.

[Formula 4]

In Chemical Formula 4,

R ₁₅ to Ris are each independently hydrogen or a linear or branched alkyl group having 1 to 10 carbon atoms, and y is an integer of 1 to 20. The R ₁₈ functional group may be bonded to at least one of the remaining carbons 2 to 6 except for the carbon 1 to which the vinyl functional group is bonded in the benzene ring.

The alkyl group is a monovalent functional group derived from alkane, and is, for example, linear, branched or cyclic, methyl, ethyl, propyl, isobutyl, sec-butyl, tert-butyl, pentyl, It may be a nuclear chamber.

The alkyl group may be substituted or unsubstituted, and the term 'substituted' means that a hydrogen atom included in the alkyl group is replaced with a specific functional group. Examples of the substituted functional group are not particularly limited, and various conventionally known functional groups or atomic groups, for example, halogen, hydroxy group, amino group and the like can be used without limitation.

^" The (meth) acrylic repeating unit means a repeating unit derived from a (meth) acrylic monomer, and specifically means a repeating unit constituting a polymer formed through polymerization between (meth) acrylic monomers. An acryl-type monomer means the compound containing a (meth) acryl functional group, Although the specific example is not specifically limited, For example, a (meth) acrylate compound or a (meth) acrylic acid compound is mentioned. More specifically, the (meth) acrylic repeating unit may include a repeating unit represented by the following Formula 5.

[Formula 5]

In Chemical Formula 5,

R ₂ i to R ₂₄ are each independently hydrogen or a series of 1 to 10 carbon atoms; Or a branched alkyl group, ζ is an integer of 1 to 20.

The alkyl group is a monovalent functional group derived from alkane, for example, straight, branched or cyclic, methyl, ethyl, propyl, isobutyl, sec-butyl, tert-butyl. Pentyl, nuclear chamber, and the like.

The alkyl group may be substituted or unsubstituted, and the term 'substituted' means that a hydrogen atom included in the alkyl group is replaced with a specific functional group. Examples of the substituted functional group are not particularly limited, and various conventionally known functional groups or atomic groups such as halogen, hydroxy group, amino group, and the like can be used without limitation.

More specifically, the vinyl polymer including the (meth) acrylate repeating unit including the epoxy functional group may include the repeating units of Formula 3, Formula 4, and Formula 5, Formula 3, Formula 4, and Formula The content of the repeating unit of 5 includes the above description. More specific examples of the vinyl polymer including the (meth) acrylate repeating unit including the epoxy functional group include Joncryl ADR-4370F (epoxy equivalent: 285 g / mol) of BASF having a weight average molecular weight of 6,800 g / mol or ADR-4468 etc. are mentioned.

In the present invention, the use of Joncryl ADR-4370F or ADR-4468, which is not well known, can be used to chain other components to polycarbonate repeat units. Through the act of extending the hydrolysis characteristics and transparency of the polycarbonate resin composition can be improved. In particular, unlike Joncryl ADR-4368, which is manufactured in high purity and used in limited quantities in food products, it is advantageous in that it is applicable to mass production. Photoactive compounds containing phenylene functional groups

The polycarbonate resin composition of one embodiment may include a photo-banung compound including a phenylene functional group. The photo-banung compound including the phenylene functional group may be included in the polycarbonate resin composition, absorb light of the ultraviolet (UV) wavelength band, and prevent deformation of the polycarbonate resin composition by ultraviolet rays.

In particular, it was confirmed through examples and comparative examples of the present invention, the photo-reflective compound including the phenylene functional group can maintain the excellent long light transparency and color stability compared to other materials that absorb light in the ultraviolet wavelength range.

Specifically, the photo-cyclic compound including the phenylene functional group may include an aromatic compound having 6 to 20 carbon atoms or an ester compound having 4 to 20 carbon atoms bonded to the phenylene functional group together with the phenylene functional group.

That is, an aromatic compound having 6 to 20 carbon atoms or an ester compound having 4 to 20 carbon atoms may be bonded to one end or sock end of the phenylene functional group, and more preferably to 6 to 20 carbon atoms at all of the sock end of the phenylene functional group. The aromatic compound of may be bonded, or the ester compound having 4 to 20 carbon atoms may be bonded to both ends of the phenylene functional group.

At this time, the optical semi-active compound in which the aromatic compound having 6 to 20 carbon atoms is bonded to all the sock ends of the phenylene functional group and the optical semi-active compound having the ester compound having 4 to 20 carbon atoms bonded to both the sock ends of the phenylene functional group are conjugated (conjugate). By forming a structure, it may exhibit reaction to ultraviolet rays.

More specifically, the aromatic compound having 6 to 20 carbon atoms may include benzoxazineone. The carbon number 2 of the benzoxazineone compound Phenylene functional groups may bind. As a specific example in which benzoxazineone is bonded to the sock end of the phenylene group, 2′2 ′-(1,4-phenylene) bis (4H-3,1-benzoxazine-4-one) [UV3638] Can be.

In addition, the ester compound having 4 to 20 carbon atoms may include methylenemalonic acid ester. The phenylene functional group may be bonded to the terminal carbon of methylene included in the methylene malonic acid ester. As such, a specific example in which methylene malonic acid ester is bonded to the sock end of the phenylene group may include P-phenylene bis (methylenemalonic acid) tetraethyl ester Hostavin B-Cap]. Polycarbonate

The term 'polycarbonate' used in the present invention means a polymer that is rinsed by reacting a diphenol-based compound, a phosgene, a carbonate ester, or a combination thereof. Polycarbonate is excellent in heat resistance, layer resistance, mechanical strength, transparency, and the like, and is widely used in the manufacture of compact discs, transparent sheets, packaging materials, automobile bumpers, and sunscreen films.

As said diphenol type compound, hydroquinone, resorcinol, 4,4'- dihydroxy diphenyl, 2, 2-bis (4-hydroxyphenyl) propane (it is also called "bisphenol-A"), 2, 4-bis (4-hydroxyphenyl) -2-methylbutane, bis (4-hydroxyphenyl) methane, 1, 1-bis (4-hydroxyphenyl) cyclonucleic acid, 2, 2-bis (3-chloro 4-hydroxyphenyl) propane, 2, 2-bis (3, 5-dimethyl-4—hydroxyphenyl) propane, 2,2-bis (3, 5-dichloro-4-hydroxyphenyl) propane ， 2 , 2-bis (3,5-dibromo-4-hydroxyphenyl) propane, bis (4-hydroxyphenyl) sulfoxide, bis (4-hydroxyphenyl) ketone, bis (4-hydroxyphenyl) Ether and the like. Preferably 4, 4'- dihydroxy diphenyl, 2,2-bis (4-hydroxyphenyl) propane may be used, in this case the structure of the polycarbonate is represented by the following formula (6):

[Formula 6]

In Formula 6, a is an integer of 1 or more.

The polycarbonate may be a mixture of co-polymers prepared from two or more diphenols. In addition, the polycarbonate may be a linear polycarbonate, branched (branched) polycarbonate, polyester carbonate copolymer resin.

Examples of the linear polycarbonates include polycarbonates produced from bisphenol -A. Examples of the branched polycarbonate include those produced by reacting polyfunctional aromatic compounds such as trimellitic anhydride and trimellitic acid with diphenols and carbonates. The polyfunctional aromatic compound may be included in an amount of 0.05 mol% to 2 mol¾ based on the total amount of the branched polycarbonate. As said polyester carbonate copolymer resin, what was manufactured by making bifunctional carboxylic acid react with diphenols and a carbonate is mentioned. As the carbonate, a diaryl carbonate such as diphenyl carbonate, ethylene carbonate, or the like may be used. '

Preferably, the polycarbonate has a weight average molecular weight of 14,000 g / m to 30,000 g / m. It is excellent in formability and workability when manufacturing a thin film product in the above range. Polycarbonate resin composition

Polycarbonate resin composition according to the present invention, 100 parts by weight of polycarbonate; O.Ol (lOppm) to 1 (1%) parts by weight of the cyclic phosphite ester compound; Linear phosphite ester compounds O.Ol (10 ppm) to 1 (1%) parts by weight; O.OOl (lOppm) to 1 (1%) parts by weight of a vinyl-based polymer including a (meth) acrylate repeating unit including an epoxy functional group: and photoreaction properties including a phenylene functional group Compound O. OOl (lOppm) to KB) parts by weight.

In particular, the content of the linear phosphite ester compound with respect to 100 parts by weight of the cyclic phosphite ester compound may satisfy 40 parts by weight to 90 parts by weight, or 50 parts by weight to 80 parts by weight, or 60 parts by weight to 70 parts by weight. . Conventionally, one of the cyclic phosphite ester compounds and the linear phosphite ester compounds has been added to improve the physical properties of the polycarbonate resin composition, but the polycarbonate resin composition of the above-described embodiment is the cyclic phosphite ester compound and the linear force. By adding a specific amount of the ester ester compound, it is possible to minimize the cloudiness under high temperature, high pressure, and high humidity conditions, to stably implement transparency, and to implement color stability.

When the content of the linear phosphite ester compound with respect to 100 parts by weight of the cyclic phosphite ester compound is excessively reduced to less than 40 parts by weight,. As the content of the cyclic phosphite ester compound increases, an acidic substance may be generated by a hydrolysis reaction under moisture conditions, and the decomposition of the polycarbonate resin may proceed. Transparency may be reduced, making it difficult to apply to optical molded parts such as light emitting diodes or ^'

If the content of the linear phosphite ester compound with respect to 100 parts by weight of the cyclic phosphite ester compound is excessively increased to more than 90 parts by weight, the product of the product is reduced according to the decrease in the color stability of the initial product due to the increase in the content of the linear phosphite ester compound. May result in yellowing or reduced transparency. The polycarbonate resin composition may include 10 parts by weight to 300 parts by weight of the vinyl polymer including the (meth) acrylate repeating unit including the epoxy functional group, based on 100 parts by weight of the cyclic phosphite ester compound and the linear phosphite ester compound. Or 20 parts by weight to 70 parts by weight, or 30 parts by weight to 45 parts by weight. The 100 parts by weight of the cyclic phosphite ester compound and the linear phosphite ester compound means 100 parts by weight in total of the cyclic phosphite ester compound and the linear phosphite ester compound. In addition, the polycarbonate resin composition is 10 parts by weight to 300 parts by weight, or 50 parts by weight to 150 parts by weight, based on 100 parts by weight of the cyclic phosphite ester compound and the linear phosphite ester compound. Or 80 parts by weight to 99 parts by weight. The 100 parts by weight of the cyclic phosphite ester compound and the linear phosphite ester compound means 100 parts by weight of the total weight of the cyclic phosphite ester compound and the linear phosphite ester compound.

In addition, if necessary, the resin composition is selected from the group consisting of antioxidants, heat stabilizers, plasticizers, antistatic agents, nucleating agents, flame retardants, lubricants, impact modifiers, optical brighteners, ultraviolet absorbers and radiation absorbers commonly used in the art. It may further comprise an additive selected from species. The resin composition is a polycarbonate, a cyclic phosphite ester compound, a linear phosphite ester compound, a vinyl-based polymer including a (meth) acrylate repeating unit including an epoxy functional group and a photoreactive compound including a phenylene functional group and additives as necessary. It can be prepared by mixing, and as described below, it is preferable to prepare a pellet by melt kneading in order to produce an optical molded article.

The melt kneading is performed by a method commonly used in the art, for example, using a ribbon blender, a Henschel mixer, a Banbury mixer, a drum rumbler, a single screw extruder, a twin screw extruder, a kneader, a multi screw extruder, or the like. can do. The degree of melting trace of the melt can be appropriately adjusted as necessary, for example, can be adjusted to a temperature of 200 ^° C to 300 ^° C. Optical molded parts

Moreover, this invention provides the optical molded article containing the said resin composition. Preferably, the optical molded article is a light guide plate, a light emitting diode or a lens. The term 'light guide plate' used in the present invention refers to a component that performs luminance and uniform illumination function of a backlight unit of a liquid crystal display. The light guide plate, the light emitting diode, or the lens should have excellent transparency, that is, light transmittance, because light is transmitted. In addition, the molding silver of the light guide plate and the high High temperature stability is required because temperature is required.

Therefore, the resin composition according to the present invention can be usefully used as an optical molded article because of its excellent light transmittance and color stability.

Method for producing a molded article may be prepared by a method commonly used in the art. For example, the injection molding method, the injection compression molding method, the extrusion molding method, the vacuum molding method, the blow molding method, the press molding method, the press molding method, the foam molding method, the thermal bending molding method, the compression molding method, Molding methods such as calender molding and rotational molding can be applied.

The size, thickness, etc. of the molded article may be appropriately adjusted according to the purpose of use, and the shape of the light guide plate may also have a flat or curved shape depending on the purpose of use.

[Effects of the Invention】

The polycarbonate resin composition according to the present invention is excellent in transmittance and color stability, can ensure high transparency, and can increase the stability of the polycarbonate resin.

[Specific contents to carry out invention]

Hereinafter, preferred embodiments of the present invention are provided to aid in understanding the present invention. However, the following examples are merely provided to more easily understand the present invention, and the contents of the present invention are not limited thereto. Material used

In the following Examples and Comparative Examples, the following materials were used. -Polycarbonate resin [Polycarbonate, PC]

Bisphenol A type linear polycarbonate having a weight average molecular weight of 29, 000 g / mol and a MFR (300 ^° C., 1.2 kg) of 14 g / min was used.

P-168

Tris (2,4-di-t-butylphenyl) phosphite [Tr is (2,4_di-tert ᅳ butylphenyl) phosphi te]; IRGAF0S 168 ― PEP36

Bis (2,6-di-tert-butyl- 4-methylphenyl) pentaerythr-di-phosphite [Bis (2,6—cU-tert—butyI—4—niethylphenyl) pentaerythr i tol—cli— phosphite The ADK STAB

ADR-4370F

Weight average. A BASF Joncryl ADR-4370F (epoxy equivalent: 285 g / niol) having a molecular weight of 6,800 g / mol was used.

ADR-4468

BASF's Joncryl ADR-4468 was used. The ADR4468 is the same as ADR4370F and Cas No, but a slight increase in epoxy equivalent and molecular weight.

-C2021P

(3 ', 4'-epoxycyclonucleic acid) methyl 3,4-epoxycyclonucleocarboxylate [(3', 4'- Epoxy cy c 1 ohexane) me t hy 1 3,4- epoxycyc 1 ohexy ^' l car boxy ! ate]

ᅳ UV3638

2,2 '-(l, 4-phenylene) bis (4H— 3,1-benzooxazine-4ion)

-B-Cap

P-phenylenebis (methylenemalonic acid) tetraethyl ester P-

Phenyleneb is (methyl enema Ionic acicDettraethyl ester]; Hostavin B-CAP

-T329

2- (2H-benzot riazol -2-y 1) -4- (l, 1,3,3-tetr anie thy 1 butyl) heno 1; Tinuvin 329

T327

2- (2 '-Hydroxy- 3', 5 '— d i— t er t ᅳ bu t y I heny 1) -5-ch 1 or obenzot r iazole; Tinuvin 327

-UV3030

1,3-bis [(2—cyano-3,3-diphenylacryloyl) oxy] -2,2-bis [[(2-cyano-3,3 ᅳ diphenylacryloyl) oxy] methyl ] Propane Examples and Comparative Examples

55 kg per hour in a twin screw extruder (L / D = 36, Φ = 45, barrel temperature 240 ^° C) after mixing each additive component to the content shown in Table 1 based on 100 parts by weight of the polycarbonate resin composition Pellet samples were prepared.

TABLE 1

Polycarbonate resin composition additive composition of an Example and a comparative example (unit: ppni)

8

Comparative Example 100 1150 500 一 ― 1200 ― ― ― — 9 Experimental Example

Physical properties of the pellets prepared in Examples and Comparative Examples were measured by the following method.

* Long light transmittance (τ%) and long light tint (ΥΙ):

Specimens (width / length / thickness = 150 mm / 80 mm / 4 mm) were injection molded and irradiated with Hi-Tachi's Spectrophotometer U-4100 in a direction perpendicular to the thickness to show long light transmittance (T%) and long light tint (ΥΙ). Was measured, and the results are shown in Table 2 below.

* Cloudiness:

Specimens (horizontal / vertical / thickness = 30 mm / 60 mm / 3 mm) were injection molded and held in an autoclave for 168 hours at 120 ^° C and 100% RH, followed by a hazemeter (NIPPON). DENSH0 U, NDH5000SP) was used to measure haze according to ASTM D1003 measurement standard and the results are shown in Table 2 below.

Table 2

Experimental Results

Comparative Example 3 11.20 75.55 2. 15 Comparative Example 4 8.48 78.32 99. 15

Comparative Example 5 8.53 79.40 99.48

Comparative Example 6 11.88 76.21 1.98

Comparative Example 7 12.01 75.64 2. 18

Comparative Example 8 10.58 76.95 2. 11 Comparative Example 9 11.21 73.28 85.49 As shown in Table 2, in the case of the embodiment according to the present invention, ADR-4370F or ADR-4468 was added while P-168 and PEP36 additives were added together. And, by using UV3638 or B-Cap as the UV stabilizer, has a low light tone (8.02 to 8.23) and high light transmittance (79.87 to 81.23) compared to the comparative example, the haze value of the final manufactured optical molded article is 1.79% It was confirmed that the low cloudiness did not occur below.

On the other hand, in the case of Comparative Example 1, Comparative Example 4, Comparative Example 5 using only one PEP36 additive, it can be confirmed that the haze value is higher than 99% in common, it is not suitable for application as an optical molded article Could confirm.

In addition, in Comparative Examples 6 and 7 using only one P—168 additive, the long light transmittance was reduced to less than 77%, the long light color tone was increased to 11 or more, and it may be difficult to secure color stability (transparency).

And also in the case of the comparative example 2 and the comparative example 3 which used other ultraviolet stabilizers other than UV3638 or B-Cap, it was confirmed that it shows a low transmittance | permeability and a high hue of light compared with an Example.

On the other hand, with respect to 100 parts by weight of PEP36 which is a cyclic phosphite ester compound, relative to Comparative Example 8 which adds 150 parts by weight of P-168 as a linear phosphite ester compound and 100 parts by weight of PEP36 as a cyclic phosphite ester compound, In Comparative Example 9 in which P-168, a phosphite ester compound, was added in an amount of 8.7 parts by weight, the light intensity of the light was increased, the light transmittance was decreased, and the haze increased, which is detrimental to the application as an optical molded product. there was.

Claims

[Claim]

[Claim 1]

Polycarbonate;

Cyclic phosphite ester compounds;

Linear phosphite ester compounds;

Vinyl polymers including (meth) acrylate repeating units containing epoxy functional groups; And

A photoreactive compound comprising a phenylene functional group,

The content of the linear phosphite ester compound with respect to 100 parts by weight of the cyclic phosphite ester compound is 40 to 90 parts by weight, polycarbonate resin composition.

[Claim 2]

The method of claim 1,

To 100 parts by weight of the cyclic phosphite ester compound and linear phosphite ester compound. 10 to 300 parts by weight of the vinyl polymer including the (meth) acrylate repeating unit including the epoxy functional group, polycarbonate resin composition.

[Claim 3]

The method of claim 1,

The polycarbonate resin composition, which is 10 parts by weight to 300 parts by weight of the optically reflective compound including the phenylene functional group, based on 100 parts by weight of the cyclic phosphite ester compound and the linear phosphite ester compound.

[Claim 4]

The method of claim 1,

The cyclic phosphite ester ^' compound comprises two phosphite functional groups and the two phosphite functional groups and a tetravalent organic functional group.

[Claim 5]

The method of claim 1,

The cyclic phosphite ester compound may be a polycarbonate resin composition represented by Formula 1 below;

[Formula 1]

In Formula 1,

¾ is a tetravalent organic functional group, ¾ and ¾ are the same or different and each independently represent an aryl group having 6 to 40 carbon atoms. -

[Claim 6]

The method of claim 5,

X is represented by the following Chemical Formula 1-1, polycarbonate

[Formula 1-1]

In Chemical Formula 1-1. Means the coupling point.

[Claim 7]

The method of claim 1,

The linear phosphite ester compound comprises a phosphite functional group and an aryl group having 6 to 40 carbon atoms bonded to the phosphite functional group, polycarbonate resin composition.

[Claim 8]

The method of claim 1,

The linear phosphite ester compound may be a polycarbonate resin OI composition represented by Formula 2 below;

3

[Formula 2]

In Formula 2 above.

R _3, R ₄ and ¾ are the same or different and each independently represents an aryl ^group, having 6 to 40 carbon atoms.

[Claim 9]

The method of claim 1,

The (meth) acrylate repeating unit including the epoxy functional group includes a repeating unit represented by the following Formula 3, polycarbonate resin composition:

[Formula 3]

In Chemical Formula 3, Rll, Rl2 and Rl3 are hydrogen or a straight or branched chain alkyl group having 1 to 10 carbon atoms, R ₁₄ is a straight or branched chain alkylene group having 1 to 10 carbon atoms, and X is an integer of 1 to 20.

[Claim 10]

The method of claim 1,

The vinyl polymer including the (meth) acrylate repeating unit including the epoxy functional group further includes an aromatic vinyl repeating unit represented by the following Formula 4 and a (meth) acrylic repeating unit represented by the following Formula 5, polycarbonate resin Composition:

[Formula 4]

In Chemical Formula 4,

R ₁₅ to R ₁₈ are each independently hydrogen or a linear or branched alkyl group having 1 to 10 carbon atoms, y is an integer of 1 to 20,

[Formula 5]

In the formula (5).

R ₂₁ to R ₂₄ are each independently hydrogen or a linear or branched alkyl group having 1 to 10 carbon atoms, and z is an integer of 1 to 20.

[Claim 11]

The method of claim 1,

The vinyl polymer including the (meth) acrylate repeating unit containing the epoxy functional group has a weight average molecular weight of 1,000 g / mol to 10,000 g / mol, polycarbonate resin composition.

[Claim 12]

The method of claim 1,

Burnyl-based polymer comprising a (meth) acrylate repeating unit containing an epoxy functional group, characterized in that the epoxy equivalent weight (Epoxy equivalent weight) of 100 g / mol to 500 g / mol, polycarbonate resin composition.

[Claim 13]

According to claim 1, ^■

The photoreactive compound containing the phenylene functional group, a polycarbonate resin composition comprising an aromatic compound having 6 to 20 carbon atoms or an ester compound having 4 to 20 carbon atoms bonded to the phenylene functional group together with the phenylene functional group.

[Claim 14]

The method of claim 13,

The aromatic compound having 6 to 20 carbon atoms includes benzoxazineone, and the ester compound having 4 to 20 carbon atoms includes methylenemalonic acid ester.

[Claim 15] According to claim 1,

The polycarbonate has a weight average molecular weight of 14,000 g / mol

It is 30, 000 g / niol, Polycarbonate resin composition.

[Claim 16]

The method of claim 1,

The polycarbonate, characterized in that it comprises a repeating unit represented by the formula (6), polycarbonate resin composition:

[Formula 6]

In Formula 6, a is an integer of 1 or more.

[Claim 17]

The method of claim 1,

The polycarbonate resin composition further comprises at least one additive selected from the group consisting of antioxidants, heat stabilizers, plasticizers, antistatic agents, nucleating agents, flame retardants, lubricants, impact modifiers, fluorescent brighteners, ultraviolet absorbers and radiation absorbers. Polycarbonate resin composition, characterized in that.

[Claim 18]

The optical molded article containing the polycarbonate resin composition of any one of Claims 1-17. [Claim 19] The method of claim 18,

The molded article, characterized in that the optical molded article is a light emitting diode or a lens.