KR20210048820A - Thermoplastic resin composition - Google Patents

Abstract

The present invention relates to a thermoplastic resin composition, which comprises: 100 parts by weight of a base resin including a first polymer obtained by graft polymerization of an alkyl (meth)acrylate monomer, an aromatic vinyl monomer, and a vinyl cyanide monomer with a diene-based rubbery polymer and a second polymer including an alkyl (meth)acrylate monomer unit, an aromatic vinyl monomer unit, and a vinyl cyanide monomer unit; and 0.6 to 1.5 parts by weight of an additive comprising an amine-based light stabilizer having steric hindrance in the form of an oligomer. The problem to be solved by the present invention is to provide the thermoplastic resin composition having excellent thermal stability and weather resistance while maintaining transparency.

Description

Thermoplastic resin composition {THERMOPLASTIC RESIN COMPOSITION}

The present invention relates to a thermoplastic resin composition, and more particularly, to a thermoplastic resin composition comprising an amine-based light stabilizer having a steric hindrance in the form of an oligomer.

The graft polymer obtained by graft polymerization of an aromatic vinyl monomer and a vinyl cyanide monomer on a diene rubber polymer has excellent impact resistance due to a diene rubber polymer, excellent processability due to an aromatic vinyl monomer, and a vinyl cyanide monomer Due to its excellent stiffness and chemical resistance, it is widely used in automobile products, home appliances, and OA products due to its beautiful appearance characteristics.

However, since the graft polymer is opaque, it has been difficult to apply to products requiring transparency, such as a microwave oven, a vacuum duct, a TV housing, a game console housing, and a transparent window for office equipment. Therefore, materials that are applied to products requiring transparency include styrene/acrylonitrile polymer, polycarbonate, GPPS (General Purpose PS), and polymethyl methacrylate, but the impact strength and processability are lower than that of the graft polymer. There was a problem of becoming.

Accordingly, a transparent graft polymer obtained by graft polymerization of a (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyanide-based monomer to a diene-based rubber polymer has been developed, but there is a problem in that thermal stability and weather resistance are deteriorated. In order to solve this problem, a method was proposed by adding a UV stabilizer and an amine-based light stabilizer having steric hindrance in the form of a monomer, but the effect of improving thermal stability was insufficient.

Accordingly, research for developing a thermoplastic resin composition excellent in both thermal stability and weather resistance is ongoing.

US2005-0148705A

The problem to be solved by the present invention is to provide a thermoplastic resin composition having excellent thermal stability and weather resistance while maintaining transparency.

In order to solve the above problems, the present invention is a first polymer obtained by graft polymerization of an alkyl (meth) acrylate monomer, an aromatic vinyl monomer, and a vinyl cyanide monomer on a diene rubber polymer, and an alkyl (meth) acrylate. 100 parts by weight of a base resin comprising a second polymer including a system monomer unit, an aromatic vinyl system monomer unit, and a vinyl cyanide monomer unit; And it provides a thermoplastic resin composition comprising 0.6 to 1.5 parts by weight of an additive comprising a compound represented by the following formula (1):

<Formula 1>

In Formula 1,

R ₁ to R ₂₉ are each independently hydrogen or a C ₁ to C ₁₀ linear alkyl group,

L ₁ or L ₂ is a direct bond or a C ₁ to C ₁₀ linear alkylene group,

n is 3 to 9.

The thermoplastic resin composition of the present invention can be remarkably improved in thermal stability and weather resistance while maintaining transparency.

Hereinafter, the present invention will be described in more detail to aid understanding of the present invention.

The terms or words used in the specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventor may appropriately define the concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is.

In the present invention, the average particle diameter of the diene-based rubber polymer may be measured by dynamic light scattering, and in detail, it may be measured using the Nicomp 380 equipment of Particle Sizing Systems. In the present invention, the average particle diameter may mean an arithmetic average particle diameter in a particle size distribution measured by a dynamic light scattering method, that is, an average particle diameter of an intensity distribution.

In the present invention, the refractive index means the absolute refractive index of a material, and the refractive index can be recognized as a ratio of the speed of electromagnetic radiation in free space to the speed of radiation in the material. At this time, the radiation may be visible light having a wavelength of 450 to 680 nm, and specifically, may be visible light having a wavelength of 589.3 nm. The refractive index can be measured using a known method, that is, an Abbe refractometer.

In the present invention, the weight average molecular weight can be measured as a relative value to a standard polystyrene (PS) sample through GPC (Gel Permeation Chromatography, waters breeze) using THF (tetrahydrofuran) as an eluent.

In the present invention, the polymerization conversion rate represents the degree to which the monomers are polymerized to form a polymer, and can be calculated by the following formula.

Polymerization conversion rate (%) = [(content of monomers participating in polymerization)/(content of total monomers added to polymerization up to the final stage)] × 100

In the present invention, the diene-based rubber polymer may mean a polymer prepared by crosslinking a diene-based monomer alone or a diene-based monomer and a comonomer copolymerizable therewith. The diene-based monomer may be at least one selected from the group consisting of 1,3-butadiene, isoprene, chloroprene, and piperylene, of which 1,3-butadiene is preferable. The comonomer may be an aromatic vinyl monomer, a vinyl cyanide monomer, or an olefin monomer. The diene-based rubber polymer may include a butadiene rubber polymer, a butadiene-styrene rubber polymer, and a butadiene-acrylonitrile rubber polymer. The diene rubber polymer is preferably a butadiene rubber polymer having excellent impact strength and chemical resistance.

In the present invention, the alkyl (meth)acrylate-based monomer may be a C ₁ to C ₁₀ alkyl (meth)acrylate-based monomer. C ₁ to C ₁₀ alkyl (meth) acrylate monomers are methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, pentyl (meth) acrylate, Hexyl (meth)acrylate, heptyl (meth)acrylate, octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, nonyl (meth)acrylate, isononyl (meth)acrylate, and decyl (meth)acrylate ) It may be one or more selected from the group consisting of acrylates, of which methyl methacrylate is preferred.

In the present invention, the aromatic vinyl-based monomer may be at least one selected from the group consisting of styrene, α-methyl styrene, α-ethyl styrene, and p-methyl styrene, among which styrene is preferable. The unit derived from the aromatic vinyl-based monomer may be an aromatic vinyl-based monomer unit.

In the present invention, the vinyl cyanide monomer may be at least one selected from the group consisting of acrylonitrile, methacrylonitrile, phenylacrylonitrile and α-chloroacrylonitrile, of which acrylonitrile is preferable. The unit derived from the vinyl cyanide monomer may be a vinyl cyanide monomer unit.

In the present invention, the C ₁ to C ₁₀ linear alkyl group may be a C ₁ to C ₁₀ linear or branched alkyl group. The C ₁ to C ₁₀ alkyl group is a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, t-butyl group, sec-butyl group, 1-methyl-butyl group, 1-ethyl -Butyl group, pentyl group, n-pentyl group, isopentyl group, neopentyl group, t-pentyl group, hexyl group, n-hexyl group, 1-methylpentyl group, 2-methylpentyl group, 4-methyl-2 -Pentyl group, 3,3-dimethylbutyl group, 2-ethylbutyl group, n-heptyl group, 1-methylhexyl group, cyclopentylmethyl group, cyclohexylmethyl group, octyl group, n-octyl group, t-octyl group, 1-methylheptyl group, 2-ethylhexyl group, 2-propylpentyl group, n-nonyl group, 2,2-dimethylheptyl group, 1-ethyl-propyl group, 1,1-dimethyl-propyl group, isohexyl group , 2-methylpentyl group, 4-methylhexyl group and 5-methylhexyl group may be at least one type from the group consisting of. Among these, at least one selected from the group consisting of methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, t-butyl group and sec-butyl group is preferable.

In the present invention, the alkylene group may mean that the alkyl group has two bonding positions, that is, a divalent group.

1. Thermoplastic resin composition

The thermoplastic resin composition according to an embodiment of the present invention comprises 1) a first polymer obtained by graft polymerization of an alkyl (meth) acrylate monomer, an aromatic vinyl monomer, and a vinyl cyanide monomer to a diene rubber polymer, and an alkyl (meth) acrylate monomer. ) 100 parts by weight of a base resin comprising a second polymer including an acrylate-based monomer unit, an aromatic vinyl-based monomer unit, and a vinyl cyanide-based monomer unit; And 2) 0.6 to 1.5 parts by weight of an additive including a compound represented by the following formula (1).

<Formula 1>

In Formula 1,

R ₁ to R ₂₉ are each independently hydrogen or a C ₁ to C ₁₀ linear alkyl group,

L ₁ or L ₂ is a direct bond or a C ₁ to C ₁₀ linear alkylene group,

n is 3 to 9.

The present inventors have found that if the compound represented by Formula 1 is included in the thermoplastic resin composition in an appropriate amount, the thermal stability and weather resistance are remarkably improved while having minimal impact on the transparency, thereby completing the present invention. .

Hereinafter, a thermoplastic resin composition according to an embodiment of the present invention will be described in detail.

1) Base resin

The base resin is a first polymer obtained by graft polymerization of an alkyl (meth)acrylate monomer, an aromatic vinyl monomer, and a vinyl cyanide monomer on a diene rubber polymer, and an alkyl (meth)acrylate monomer unit and an aromatic vinyl monomer And a second polymer comprising a unit and a vinyl cyanide-based monomer unit.

The first polymer may impart excellent impact resistance to the thermoplastic resin composition.

The diene-based rubbery polymer of the first polymer may have an average particle diameter of 200 to 400 nm, preferably 250 to 350 nm, and more preferably 280 to 320 nm. If the above-described range is satisfied, the impact strength and tensile strength of the thermoplastic resin composition may be improved.

The first polymer grafts 40 to 60 parts by weight of a diene rubber polymer, 20 to 45 parts by weight of a (meth)acrylate monomer, 5 to 20 parts by weight of an aromatic vinyl monomer, and 3 to 15 parts by weight of a vinyl cyanide monomer It may be a polymerized graft polymer, preferably 45 to 55 parts by weight of a diene rubber polymer, 25 to 40 parts by weight of a (meth)acrylate monomer, 7 to 15 parts by weight of an aromatic vinyl monomer, and a vinyl cyanide monomer It may be a graft polymer obtained by graft polymerization in 5 to 10 parts by weight. If the above-described conditions are satisfied, a graft polymer having excellent impact resistance, transparency processability, and chemical resistance can be prepared. Here, when preparing the graft polymer, the content may be 100 parts by weight in total of a diene-based rubber polymer, a (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyanide-based monomer.

The difference in refractive index of the shell prepared by polymerizing the diene-based rubber polymer of the first polymer and the (meth)acrylate-based monomer, the aromatic vinyl-based monomer, and the vinyl cyanide-based monomer is 0 to 0.01, preferably 0 to 0.005, More preferably, it may be 0. If the above-described conditions are satisfied, a transparent first polymer can be prepared.

The first polymer may be a graft polymer obtained by graft polymerization of methyl methacrylate, styrene, and acrylonitrile on a butadiene rubber polymer.

The second polymer is a matrix polymer and may impart excellent transparency and processability to the thermoplastic resin composition.

The second polymer may be prepared by polymerizing a (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyanide-based monomer, preferably 60 to 80 parts by weight of a (meth)acrylate-based monomer, and an aromatic vinyl-based monomer 15 to 35 parts by weight and 3 to 15 parts by weight of a vinyl cyanide monomer can be prepared by polymerization, more preferably 65 to 75 parts by weight of a (meth)acrylate monomer, 20 to 30 parts by weight of an aromatic vinyl monomer, and cyanide It can be prepared by polymerizing 5 to 10 parts by weight of a vinyl-based monomer. If the above-described conditions are satisfied, a second polymer having excellent transparency, processability and chemical resistance can be prepared.

Meanwhile, the difference in refractive index between the first polymer and the second polymer may be 0 to 0.01, preferably 0 to 0.005, more preferably 0. If the above-described conditions are satisfied, a transparent thermoplastic resin composition can be prepared.

The first polymer and the second polymer may each have a refractive index of 1.515 to 1.517, preferably 1.5155 to 1.5165. If the above-described conditions are satisfied, the first polymer or the second polymer excellent in transparency can be prepared.

The base resin may include the first polymer and the second polymer in a weight ratio of 50:50 to 30:70, preferably 45:55 to 35:75. If the above-described range is satisfied, a thermoplastic resin composition having excellent transparency, impact resistance, and processability can be prepared.

2) additive

The additive includes a compound represented by the following formula (1).

<Formula 1>

In Formula 1,

R ₁ to R ₂₉ are each independently hydrogen or a C ₁ to C ₁₀ linear alkyl group,

L ₁ or L ₂ is a direct bond or a C ₁ to C ₁₀ linear alkylene group,

n is 3 to 9.

In Formula 1, R ₁ to R ₂₉ may each independently be a C ₁ to C ₄ linear alkyl group, L ₁ or L ₂ may be a C ₄ to C ₈ linear alkylene group, and n is 5 to 7 to be. If the above-described conditions are satisfied, thermal stability may be excellent, and injection-holding characteristics at high temperatures may be excellent.

Since the compound represented by Formula 1 is in the form of an oligomer, unlike amine-based light stabilizers having a steric hindrance in a monomeric form, it has very excellent thermal stability, so it does not decompose even under high temperature injection residence conditions, and can minimize discoloration due to heat. have. The compound represented by Chemical Formula 1 can significantly improve not only the thermal stability of the thermoplastic resin composition, but also weather resistance. Accordingly, even when the thermoplastic resin composition is extruded and injected for processing, discoloration due to heat may be prevented, and discoloration due to light may also be prevented.

The thermoplastic resin composition may include the additive in an amount of 0.6 to 1.5 parts by weight, and preferably 0.8 to 1 part by weight, based on 100 parts by weight of the base resin. If the above-described range is satisfied, it is possible to significantly improve the thermal stability and weather resistance of the thermoplastic resin composition, while minimizing deterioration of the basic physical properties of the thermoplastic resin composition, that is, transparency, processability, impact strength, and color characteristics. When the content is less than the above-described content, the thermal stability improvement effect is insufficient, and when the content exceeds the above-described content, the basic physical properties of the thermoplastic resin composition, that is, transparency, processability, impact strength, and color characteristics are deteriorated.

The compound represented by Formula 1 may be a compound represented by the following Formula 1-1:

<Formula 1-1>

In Formula 1-1,

n ₁ is 5 to 7.

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

Manufacturing example One

Into the reactor, butadiene rubber polymer latex (average particle diameter: 300 nm, refractive index: 1.516) 50 parts by weight (based on solid content), methyl methacrylate 32 parts by weight, styrene 11 parts by weight, acrylonitrile 7.0 parts by weight, ions Exchange water 100 parts by weight, cumene hydroperoxide 0.04 parts by weight, sodium formaldehyde sulfoxylate 0.048 parts by weight, sodium ethylenediaminetetraacetate 0.012 parts by weight, ferrous sulfate 0.001 parts by weight, sodium dodecyl benzene sulfonate 1.0 parts by weight , 0.3 parts by weight of t-dodecyl mercaptan was polymerized while continuously added at 75° C. for 5 hours. After the continuous charging was completed, the reactor was heated to 80° C. and then aged for 1 hour, and polymerization was terminated. At this time, the polymerization conversion ratio of the obtained graft polymer latex was 99%, and the graft polymer latex was agglomerated with an aqueous calcium chloride solution, washed, dehydrated, and dried to prepare a MABS graft polymer powder. The MABS graft polymer powder had a refractive index of 1.516.

Manufacturing example 2

A raw material obtained by mixing 69 parts by weight of methyl methacrylate, 24 parts by weight of styrene, 7 parts by weight of acrylonitrile, 30 parts by weight of toluene, and t-dodecyl mercaptan was continuously added to the reactor so that the average polymerization time was 3 hours. At this time, the polymerization temperature was maintained at 148 °C. The polymerization solution discharged from the reactor was heated in a preheating tank, and unreacted monomers were volatilized in the volatilization tank. Thereafter, a pellet-type MSAN polymer was prepared using a polymer transfer pump extrusion processor maintained at 210°C. The weight average molecular weight of the obtained polymer resin was 120,000 g/mol, and the refractive index was 1.516.

Example And Comparative example

Information on the ingredients used in the following Examples and Comparative Examples is as follows.

1-1) First polymer: MABS graft polymer powder of Preparation Example 1

2-1) Second Polymer: MSAN Polymer of Preparation Example 2

3-1) Additive: BASF's Chimassorb ^® 2020 (compound represented by Chemical Formula 1-1)

)4) Additive: BASF's Tinuvin 622 (

)

)5) Additive: BASF's Tinuvin 770 (

)

The above-described components were mixed according to the contents shown in the following table and stirred to prepare a thermoplastic resin composition.

Experimental example One

After uniformly mixing 2.0 parts by weight of a lubricant (ethylenebis steramide) and 0.4 parts by weight of an antioxidant in the thermoplastic resin compositions of Examples and Comparative Examples, pellets were prepared by extruding. The pellets were injected at 230° C. and aged for 12 hours under the conditions of 25° C. and 50 ± 5% relative humidity to prepare a specimen. Then, the physical properties were evaluated by the following method.

(1) Transmittance (%): The transmittance of a 3 mm sheet was measured according to ASTM D1003.

(2) Transparency (HAZE): The haze value of a 3 mm sheet was measured according to ASTM D1003.

(3) Melt Flow Index (g/10 min): According to ASTM 1238, it was measured at 220° C. and 10 kg.

(4) Impact strength (kgf·cm/cm: Using a 1/4 inch specimen, the notched Izod impact strength was measured according to ASTM D256.

(5) L, a, b: Hunter Lab values were measured with Color Quest II.

(6) Injection hold (ΔE ₁ ): The pellets of Examples and Comparative Examples were injected at 250° C. and aged for 12 hours under conditions of 25° C. and 50 ± 5% relative humidity to prepare a specimen. After the specimen was allowed to stay in the cylinder of the injection machine at 250° C. for 10 minutes, the L, a, and b values of the specimen before and after the stay were measured with a CIE LAB color coordinate system, and the injection retention values were derived by substituting them into the following equation.

In the above formula, L ₁ ′, a ₁ ′ and b ₁ ′ are the values of L, a and b measured by the CIE LAB color coordinate system after staying, and L _1, a _1, and b ₁ are the CIE LAB color of the specimen before staying. These are L, a, and b values measured with a coordinate system.

(7) Weather resistance 1 (ΔE ₂ ): The specimen was stored for 150 hours under conditions of a xenon arc lamp of 0.7 W/m 2 and 60°C using an ATLAS device of AMETEK. The L, a, and b values of the specimen before storage for 150 hours and after storage for 150 hours were measured with a CIE LAB color coordinate system, and substituted into the following equation to derive the injection retention value.

In the above formula, L ₂ ′, a ₂ ′ and b ₂ ′ are L, a and b values measured with a CIE LAB color coordinate system after storage for 150 hours, and L _2, a _2, and b ₂ are specimens before storage for 150 hours. Are L, a, and b values measured with the CIE LAB color coordinate system.

(8) Weather resistance 2 (ΔE ₃ ): The specimen was stored for 300 hours under conditions of a xenon arc lamp of 0.7 W/m 2 and 60°C using an ATLAS device of AMETEK. The L, a, and b values of the specimen before storage for 300 hours and after storage for 300 hours were measured with a CIE LAB color coordinate system, and substituted into the following equation to derive the injection retention value.

In the above formula, L ₃ ′, a ₃ ′ and b ₃ ′ are the L, a and b values measured with the CIE LAB color coordinate system after storage for 300 hours, and L _3, a _3, and b ₃ are the specimens before storage for 300 hours. Are L, a, and b values measured with the CIE LAB color coordinate system.

division Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 1-1) First polymer (parts by weight) 40 40 40 40 40 2-1) Second polymer (parts by weight) 60 60 60 60 60 3-1) Additive (parts by weight) 0 0.35 0.5 0.6 0.8 Transmittance 91.2 91.0 91.1 91.0 91.0 transparency 1.9 1.9 1.9 1.9 2.0 Flow index 28.5 28.4 28.4 27.9 27.4 Impact strength 17.89 17.56 17.62 17.44 17.4 L 95.30 94.85 94.85 94.81 94.8 a -1.59 -2.24 -2.23 -2.26 -2.29 b 4.36 5.17 5.15 5.21 5.20 Injection stay 3.94 3.04 2.99 2.36 2.11 Weather resistance 1 2.64 0.76 0.75 0.7 0.66 Weather resistance 2 3.27 0.96 0.98 0.94 0.89 1-1) First polymer: MABS graft polymer powder of Preparation Example 1 (refractive index: 1.516)
2-1) Second polymer: MSAN polymer of Preparation Example 2 (refractive index: 1.516)
3-1) Additive: BASF's Chimassorb® 2020 (compound represented by Chemical Formula 1-1)

division Example 3 Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 1-1) first polymer
(Part by weight) 40 40 40 40 40 2-1) Second polymer (parts by weight) 60 60 60 60 60 3-1) Additive (parts by weight) One 1.5 1.6 0 0 4) Additive (parts by weight) 0 0 0 0.8 0 5) Additive (parts by weight) 0 0 0 0 0.8 Transmittance 90.8 90.5 89.1 91 90.9 transparency 2 2.2 2.8 2.0 2.1 Flow index 26.5 25.2 21.5 27.8 28.6 Impact strength 17.39 17.11 16.74 16.73 17.49 L 94.77 94.56 92.88 95.01 94.65 a -2.31 -2.42 -2.7 -2.25 -2.19 b 6.02 7.17 7.82 5.33 5.31 Injection stay 2.04 1.90 1.87 3.24 3.17 Weather resistance 1 0.60 0.55 0.5 1.17 0.95 Weather resistance 2 0.84 0.73 0.7 2.21 1.37 1-1) First polymer: MABS graft polymer powder of Preparation Example 1 (refractive index: 1.516)
2-1) Second polymer: MSAN polymer of Preparation Example 2 (refractive index: 1.516)
3-1) Additive: BASF's Chimassorb ^® 2020 (compound represented by Chemical Formula 1-1)
4) Additive: BASF's Tinuvin 622
5) Additive: BASF's Tinuvin 770

Referring to Tables 1 and 2, it can be seen that Examples 1 to 4 containing the compound represented by Formula 1-1 in an amount of 0.6 to 1.5 parts by weight are remarkably excellent in transmittance, transparency, injection retention characteristics, and weather resistance. there was. On the other hand, Comparative Example 1, which does not contain the compound represented by Formula 1-1, and Comparative Examples 2 and 3 including a small amount of the compound represented by Formula 1-1, were injected compared to Examples 1 to 4 It was confirmed that the retention characteristics and weather resistance were remarkably deteriorated. In addition, Comparative Example 5 containing an excessive amount of the compound represented by Formula 1-1 had significantly lower transmittance, transparency, and impact strength compared to Examples 1 to 4, and it was confirmed that it was not suitable as a transparent material. .

On the other hand, it was confirmed that in Comparative Examples 6 and 7 including the amine-based light stabilizer having a steric hindrance in the form of a monomer instead of the compound represented by Formula 1-1, the injection retention characteristics and weather resistance were significantly reduced.

From these results, it was confirmed that only when the compound represented by Chemical Formula 1-1 was included, excellent transmission properties, transparency, and impact resistance were realized, while excellent injection retention characteristics and weather resistance were realized.

Claims (7)

A first polymer obtained by graft polymerization of an alkyl (meth)acrylate monomer, an aromatic vinyl monomer, and a vinyl cyanide monomer to a diene rubber polymer, and cyanide with an alkyl (meth)acrylate monomer unit and an aromatic vinyl monomer unit. 100 parts by weight of a base resin containing a second polymer containing a vinyl-based monomer unit; And
A thermoplastic resin composition comprising 0.6 to 1.5 parts by weight of an additive containing a compound represented by the following formula (1):
<Formula 1>

In Formula 1,
R ₁ to R ₂₉ are each independently hydrogen or a C ₁ to C ₁₀ linear alkyl group,
L ₁ or L ₂ is a direct bond or a C ₁ to C ₁₀ linear alkylene group,
n is 3 to 9.
The method according to claim 1,
The thermoplastic resin composition
100 parts by weight of the base resin; And
The thermoplastic resin composition containing 0.8 to 1 part by weight of the additive.
The method according to claim 1,
The compound represented by Formula 1 is a thermoplastic resin composition represented by the following Formula 1-1:
<Formula 1-1>

In Formula 1-1,
n ₁ is 5 to 7.
The method according to claim 1,
The difference in refractive index between the first polymer and the second polymer is 0 to 0.01, the thermoplastic resin composition.
The method of claim 4,
The first and second polymers each have a refractive index of 1.515 to 1.517.
The method according to claim 1,
The base resin is a thermoplastic resin composition comprising the first polymer and the second polymer in a weight ratio of 50:50 to 30:70.
The method according to claim 1,
The diene-based rubbery polymer of the first polymer has an average particle diameter of 200 to 400 nm.