KR101432602B1 - Glass fiber reinforced polyester resin composition and molded product using the same - Google Patents

Abstract

(A) a polyester resin; (B) glass fibers; (C) a polyalkyl (meth) acrylate having a weight average molecular weight of 80,000 to 130,000 g / mol; (D) a heat stabilizer; And (E) an ultraviolet absorber, and a molded article using the same.

Description

FIELD OF THE INVENTION The present invention relates to a glass fiber reinforced polyester resin composition,

The present invention relates to a glass fiber-reinforced polyester resin composition and a molded article using the same.

Polyester resins are widely used for automotive exterior materials or UTH (under the hood) and are mainly reinforced with glass fiber to realize mechanical and thermal properties.

However, the ester bond of the polyester resin is poor in hydrolysis, and when used for a long time in a heat and high-humidity environment, the molecular weight is lowered due to truncation of the main chain.

One aspect of the present invention is to provide a glass fiber-reinforced polyester resin composition having not only excellent weather resistance but also excellent impact resistance and appearance.

Another aspect of the present invention is to provide a molded article using the glass fiber-reinforced polyester resin composition.

An aspect of the present invention relates to a polyester resin composition comprising (A) a polyester resin; (B) glass fibers; (C) a polyalkyl (meth) acrylate having a weight average molecular weight of 80,000 to 130,000 g / mol; (D) a heat stabilizer; And (E) an ultraviolet absorber, wherein the polyalkyl (meth) acrylate (C) is contained in an amount of 3 to 10% by weight based on the total amount of (A), (B) A reinforced polyester resin composition is provided.

Wherein the glass fiber reinforced polyester resin composition comprises 40 to 80% by weight of the polyester resin (A); 10 to 50% by weight of the glass fiber (B); 3 to 10% by weight of the polyalkyl (meth) acrylate (C); 0.1 to 5 parts by weight of the heat stabilizer (D) relative to 100 parts by weight of the total amount of (A), (B) and (C) And 0.1 to 5 parts by weight of the ultraviolet absorber (E) relative to 100 parts by weight of the total amount of the components (A), (B) and (C).

The polyester resin (A) may include a polyethylene terephthalate resin, a polytrimethylene terephthalate resin, a polybutylene terephthalate resin, a polyhexamethylene terephthalate resin, a polycyclohexanedimethylene terephthalate resin, or a combination thereof .

The weight average molecular weight of the polyalkyl (meth) acrylate (C) may be 90,000 to 110,000 g / mol.

The polyalkyl (meth) acrylate (C) may be contained in an amount of 5 to 7% by weight based on the total amount of (A), (B) and (C).

The heat stabilizer (D) may comprise a hindered phenolic compound, a phosphite compound, a phosphate compound, or a combination thereof, and specifically includes 2,6-di-tetra-butyl- (3,3-bis (4'-hydroxy-3'-t-butylphenyl) butanoic acid) Glycol esters, tetrabis (methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate) methane, triphenylphosphite, triisodecylphosphite, diphenyl- (2,4-t-butylphenyl) phosphite, tris (nonylphenyl) phosphite, distearyl-pentaerythritol-diphosphite, dihydrogenphosphate, or combinations thereof. have.

The ultraviolet absorber (E) may include a benzotriazole-based compound, a benzophenone-based compound, or a combination thereof, and specifically includes 2- (2-hydroxy-5-methylphenyl) -2H-benzotriazole, (5-chloro-2H-benzotriazole) -4,6-bis (1,1-dimethylethyl) Methyl-6-dodecyl, 2- (4,6-diphenyl-1,3,5-triazine-2- Yl) -5-hexyloxy-phenol, a compound represented by the following formula (1), or a combination thereof.

[Chemical Formula 1]

The heat stabilizer (D) and the ultraviolet absorber (E) may be contained in a weight ratio of 2: 1 to 1: 3.

Another aspect of the present invention provides a molded article produced using the glass fiber-reinforced polyester resin composition.

Other aspects of the present invention are included in the following detailed description.

The glass fiber-reinforced polyester resin composition is excellent in weather resistance, impact resistance and appearance, and therefore can be usefully used for various molded articles, particularly automobile exterior materials or UTH (under the hood).

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited thereto, and the present invention is only defined by the scope of the following claims.

As used herein, unless otherwise specified, "(meth) acrylate" means that both "acrylate" and "methacrylate" are possible. "(Meth) acrylic acid ester" means that both "acrylic acid alkyl ester" and "methacrylic acid alkyl ester" can be used. It means that it is possible.

Unless otherwise specified herein, "substituted" means that at least one hydrogen atom is replaced by a halogen atom (F, Cl, Br, I), a hydroxy group, a C1 to C20 alkoxy group, a nitro group, a cyano group, A thio group, an ester group, an ether group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid or a salt thereof, an amidino group, a hydrazino group, a hydrazino group, a carbonyl group, a carbamyl group, A cycloalkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, a cycloalkenyl group having 3 to 20 carbon atoms, a cycloalkynyl group having 3 to 20 carbon atoms, Substituted with a substituent of a C2 to C20 heterocycloalkyl group, a C2 to C20 heterocycloalkenyl group, a C2 to C20 heterocycloalkynyl group, a C3 to C30 heteroaryl group, or a combination thereof.

Also, unless otherwise specified herein, "hetero" means that at least one heteroatom of N, O, S and P is included in the ring group.

The glass fiber reinforced polyester resin composition according to one embodiment includes (A) a polyester resin, (B) glass fiber, (C) a polyalkyl (meth) acrylate, (D) a heat stabilizer and (E) can do.

Hereinafter, each component contained in the glass fiber reinforced polyester resin composition according to one embodiment will be described in detail.

(A) a polyester resin

The polyester resin may be an aromatic polyester resin, which is obtained by condensation polymerization of a terephthalic acid or terephthalic acid alkyl ester and a glycol component having 2 to 10 carbon atoms by melt polymerization. Wherein the alkyl may be C1 to C10 alkyl.

Specific examples of the polyester resin include polyethylene terephthalate resin, polytrimethylene terephthalate resin, polybutylene terephthalate resin, polyhexamethylene terephthalate resin, polycyclohexanedimethylene terephthalate resin, or a combination thereof. Among them, a polyethylene terephthalate resin, a polytrimethylene terephthalate resin, a polybutylene terephthalate resin, or a combination thereof can be preferably used, and more preferably, a polyethylene terephthalate resin, a polybutylene terephthalate resin, Or a combination thereof.

When the polybutylene terephthalate resin and the polyethylene terephthalate resin are mixed, they may be used in a weight ratio of 2: 3 to 5: 1, and more specifically, they may be mixed at a weight ratio of 1: 1 to 3: 1 . When mixed in the above-mentioned ratio range, excellent impact resistance and moldability can be obtained.

The polyester resin may have an intrinsic viscosity [] of 0.85 to 1.52 dl / g, and more specifically 1.03 to 1.22 dl / g. The polyester resin may have a specific gravity ranging from 1.15 to 1.4 g / cm 3 and a melting point ranging from 210 to 280 ° C. When the polyester resin has an intrinsic viscosity, specific gravity and melting point in the above range, excellent mechanical properties and moldability can be obtained.

The polyester resin may be contained in an amount of 40 to 80% by weight based on the total amount of the polyester resin (A), the glass fiber (B) and the polyalkyl (meth) acrylate (C) 70% by weight. When the polyester resin is contained within the above range, excellent mechanical strength and impact strength can be obtained.

(B) glass fiber

By adding the glass fiber, the impact strength which can be lowered by adding the polyalkyl (meth) acrylate to be described later can be increased.

The glass fiber is a commercially available glass fiber having a diameter of 8 to 20 mu m and a length of 1.5 to 8 mm. When the diameter of the glass fiber is within the above range, excellent impact reinforcing properties can be obtained. When the length of the glass fiber is in the above range, it is easy to inject into the extruder and the degree of impact reinforcement can be greatly improved.

The glass fibers may be used in combination with carbon fibers, basalt fibers, fibers prepared from biomass, or combinations thereof. The term biomass refers to an organism that uses plants or microorganisms as an energy source.

The glass fibers may be circular, elliptical, rectangular, or dumbbell-shaped in which two circular rings are connected. The glass fiber may have a cross-sectional aspect ratio of less than 1.5. Specifically, a circular fiber having an aspect ratio of 1 may be used. Wherein the aspect ratio is defined as the ratio of the longest diameter to the smallest diameter in the cross section of the glass fiber. When the glass fiber having the aspect ratio range of the cross section is used, the cost of the product can be reduced in terms of cost, and the glass fiber having a circular section can be used to improve dimensional stability and appearance.

The glass fiber may be treated with a predetermined glass fiber treatment agent to prevent the reaction of the polyester resin and improve the degree of impregnation. The treatment of the glass fiber can be performed at the time of fiber production or after the fiber production.

As the glass fiber treatment agent, a lubricant, a coupling agent, a surfactant and the like are used. The lubricant is used to form a good strand having a certain diameter and thickness in the production of glass fibers, and the coupling agent serves to impart good adhesion between the glass fiber and the resin. When these various glass fiber treating agents are appropriately selected depending on the type of resin and glass fiber to be used, good physical properties are imparted to the glass fiber reinforcing material.

The glass fiber may be contained in an amount of 10 to 50% by weight based on the total amount of the polyester resin (A), the glass fiber (B) and the polyalkyl (meth) acrylate (C) % ≪ / RTI > by weight. When the glass fiber is contained within the above range, excellent mechanical strength and moldability can be obtained.

(C) Polyalkyl ( Meta ) Acrylate

By adding the polyalkyl (meth) acrylate, the weather resistance of the glass fiber-reinforced polyester resin composition can be greatly improved.

The polyalkyl (meth) acrylate may be a polyalkyl (meth) acrylate having a high molecular weight, and may specifically have a weight average molecular weight of 80,000 to 130,000 g / mol, more specifically 90,000 to 110,000 g / mol. When a polyalkyl (meth) acrylate having a weight average molecular weight within the above range is used, excellent appearance characteristics and weather resistance can be obtained.

The polyalkyl (meth) acrylate may be a homopolymer based on alkyl (meth) acrylate; Copolymers or mixtures of alkyl acrylates and alkyl methacrylates may be used. The alkyl may be substituted or unsubstituted C1 to C10 alkyl. Specific examples of the alkyl (meth) acrylate include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) Hydroxyethyl (meth) acrylate, and the like.

The polyalkyl (meth) acrylate can be obtained by polymerizing a starting monomer containing an alkyl (meth) acrylate by a known polymerization method such as suspension polymerization, bulk polymerization or emulsion polymerization.

The polyalkyl (meth) acrylate may be contained in an amount of 3 to 10% by weight based on the total amount of the polyester resin (A), the glass fiber (B) and the polyalkyl (meth) acrylate (C) By weight may be contained in an amount of 5 to 7% by weight. When the polyalkyl (meth) acrylate is contained within the above range, excellent appearance characteristics can be maintained, and weather resistance can be improved while maintaining excellent impact resistance.

(D) Heat stabilizer

By adding the heat stabilizer, the prevention of oxidation of the polyester resin and the weather resistance according to heat stability can be improved.

The thermal stabilizer may be a hindered phenol-based compound, a phosphite-based compound, a phosphate-based compound, or a combination thereof.

The hindered phenol compound may be at least one selected from the group consisting of 2,6-di-tetra-butyl-4-methylphenol, octadecyl-3- (3,5- (3,5-di-t-butyl-4-hydroxyphenyl) butanoic acid) glycol ester, tetrabis (methylene- Propionate) methane, etc. These may be used singly or in combination of two or more thereof.

Examples of the phosphite-based compound include commercially available compounds such as triphenyl phosphite, triisodecyl phosphite, diphenyl-iso-octyl-phosphite, tris (2,4-t-butylphenyl) Fate, tris (nonylphenyl) phosphite, distearyl-pentaerythritol-diphosphite, etc. These may be used singly or in combination of two or more thereof.

The phosphate compound may be dihydrogen phosphate or the like.

When the hindered phenol-based compound and the phosphite-based compound are mixed and used, they may be mixed in a weight ratio of 1: 2 to 1: 5. When mixed in the above-mentioned ratio range, the weatherability is excellent.

The heat stabilizer may be contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total amount of the polyester resin (A), the glass fiber (B) and the polyalkyl (meth) acrylate (C) To 2 parts by weight. When the heat stabilizer is contained within the above range, excellent weather resistance and excellent glossiness at high temperature can be obtained.

(E) Ultraviolet absorber

By adding the ultraviolet absorber, the photopolymerization of the polyester resin can be stabilized from ultraviolet rays.

The ultraviolet absorber may be a benzotriazole compound, a benzophenone compound, or a combination thereof.

Examples of the benzotriazole compound include 2- (2-hydroxy-5-methylphenyl) -2H-benzotriazole, hydroxy-3,5-di (1,1-dimethylbenzyl) Bis (1,1-dimethylethyl), phenol-1,2- (2H-benzotriazol-2-yl) - 4-methyl-6-dodecyl, etc. These may be used singly or in combination of two or more thereof.

Examples of the benzophenone compound include 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-hexyloxy-phenol, .

[Chemical Formula 1]

The ultraviolet absorber may be included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total amount of the polyester resin (A), the glass fiber (B) and the polyalkyl (meth) acrylate (C) To 2 parts by weight. When the ultraviolet absorber is contained within the above range, excellent weather resistance can be obtained without lowering impact strength and heat resistance.

The heat stabilizer (D) and the ultraviolet absorber (E) may be mixed in a weight ratio of 2: 1 to 1: 3, and may be used in a weight ratio of 1: 1 to 1: 2. When they are mixed in the above weight ratio range, synergy due to the light source blocking effect by the ultraviolet absorbent and the radical capturing effect of the heat stabilizer can be obtained, and excellent heat stability and weatherability can be obtained.

(F) Other additives

The glass fiber-reinforced polyester resin composition may further comprise at least one selected from the group consisting of an antimicrobial agent, a releasing agent, a surfactant, a coupling agent, a plasticizer, an admixture, a colorant, a lubricant, an antistatic agent, an ultraviolet screening agent, a coloring agent, a flame retardant, And may further include additives.

As the release agent, a fluorine-containing polymer, a silicone oil, a metal salt of stearic acid, a metal salt of montanic acid, a montanic ester wax or a polyethylene wax may be used. The colorant may be a dye or a pigment. Titanium dioxide (TiO ₂ ) or carbon black may be used as the ultraviolet screening agent. As the nucleating agent, talc or clay may be used.

(A), the glass fiber (B), and the polyalkyl (meth) acrylate (A), the glass fiber (B) (C) may be contained in an amount of 40 parts by weight or less based on 100 parts by weight of the total amount, and more specifically 0.1 to 30 parts by weight.

The above-mentioned glass fiber-reinforced polyester resin composition can be produced by a known method for producing a resin composition. For example, the components and other additives according to one embodiment may be simultaneously mixed and then melt-extruded in an extruder and produced in the form of pellets.

According to another embodiment, there is provided a molded article produced by molding the above-mentioned glass fiber-reinforced polyester resin composition. That is, the glass fiber-reinforced polyester resin composition can be used to produce a molded article by various processes such as injection molding, blow molding, extrusion molding, and thermoforming. Specifically, it can be usefully applied to molded articles requiring excellent weather resistance, impact resistance and appearance characteristics, particularly, automotive exterior materials, or plastic exterior products such as UTH (under the hood).

Hereinafter, preferred embodiments of the present invention will be described. However, the following examples are only a preferred embodiment of the present invention, and the present invention is not limited by the following examples.

(Example)

Each component used in the production of the glass fiber-reinforced polyester resin composition according to one embodiment is as follows.

(A) a polyester resin

(A-1) As a polybutylene terephthalate (PBT) resin having an intrinsic viscosity [?] Of 1.10 ± 0.02 dl / g, Shinite K006 manufactured by SHINKONG Co., Ltd. was used.

(A-2) SKIPET 1100 manufactured by SK Chemicals was used as a polyethylene terephthalate (PET) resin having an intrinsic viscosity [?] Of 0.77 ± 0.02 dl / g.

(B) glass fiber

An ECS 03T-187H product of NITTOBO Co., Ltd. was used as a glass fiber having a diameter of 13 μm and a length of 3 mm.

(C) Polyalkyl ( Meta ) Acrylate

(C-1) polymethyl methacrylate (Cheil Industries) having a weight average molecular weight of 97,000 g / mol was used.

(C-2) Polymethyl methacrylate (Cheil Industries) having a weight average molecular weight of 150,000 g / mol was used.

(C-3) Polymethyl methacrylate (Cheil Industries) having a weight average molecular weight of 78,000 g / mol was used.

(D) Heat stabilizer

(D-1) IRGANOX B-215 product of CIBA GEIGY was used. The product is a mixture of a hindered phenol compound (IRGANOX 1010 product of CIBA GEIGY) and a phosphite compound (IRGAFOS 168 product of CIBA GEIGY) at a weight ratio of 1: 2.

(D-2) 　 Sodium phosphate monohydrate product of Youngjin Chemical Co., Ltd. was used. The product consists of sodium dihydrogen phosphate.

(E) Ultraviolet absorber

(E-1) A Tinuvin 234 product from CIBA GEIGY was used. The product is composed of hydroxy-3,5-di (1,1-dimethylbenzyl) phenyl-2H-benzotriazole.

(E-2) The product Tinuvin 1577FF from CIBA GEIGY was used. The product is composed of 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-hexyloxy-phenol.

Example  1 to 8 and Comparative Example  1 to 6

The glass fiber reinforced polyester resin composition according to each of Examples 1 to 8 and Comparative Examples 1 to 6 was prepared with the compositions shown in the following Table 1 by using the above-mentioned components.

As the production method thereof, each component was mixed with the composition shown in the following Table 1, and 0.5 part by weight of a lubricant (HI-WAX 400P product of MITSUI Petrochemical Co., Ltd.) and a coloring agent (HI-BLACK 50L product of Degussa Co., ) Were mixed and then melted and kneaded and extruded to prepare pellets. A twin-screw extruder having an L / D of 36 and a diameter of 45 mm was used for the extrusion, and the barrel temperature was set at 250 to 270 ° C.

The weight unit of the lubricant and the colorant is a unit based on 100 parts by weight of the total amount of the polyester resin (A), the glass fiber (B), and the polyalkyl (meth) acrylate (C).

(Test Example)

The pellets were dried at 100 DEG C for 4 hours or more and then set at a cylinder temperature of 250 to 270 DEG C and a mold temperature of 70 to 100 DEG C by using an injection molding machine having an injection capability of 6 oz and an ASTM dumbbell ). The specimens of 2.5 mm x 50 mm x 90 mm were prepared by injection molding. The physical properties of the prepared physical specimens were measured by the following methods, and the results are shown in Table 1 below.

1) Weatherability: The color difference (ΔE) was measured using a CM-3600 colorimeter of Minolta Co., after exposure to light for 500 hours with Weather-O-Meter according to SAE J 1960. At this time, the light source was a Xenon arc lamp and irradiated at a dose of 0.55 W / m ² at 340 nm.

2) Glossiness: The specimens subjected to the weather resistance test for 500 hours using a UGV-6P gloss meter manufactured by SUGA Co., Ltd. were measured at an angle of 60 °, and the change in glossiness after the weather resistance was calculated as% after the initial glossiness.

3) IZOD impact strength: measured according to ASTM D256 (specimen thickness 1/8 ").

Item Example Comparative Example One 2 3 4 5 6 7 One 2 3 4 5 6 7 8 (A) Polyester resin (% by weight) (A-1) PBT resin 35 40 40 40 40 30 30 35 35 35 35 35 30 30 25 (A-2) PET resin 30 25 25 23 23 15 13 35 30 30 33 22 20 18 12 (B) Glass fiber (% by weight) 30 30 30 30 30 50 50 30 30 30 30 30 50 50 50 (C) Polyalkyl (meth) acrylate (% by weight) (C-1) 5 5 5 7 7 5 7 - - - 2 13 - 2 13 (C-2) - - - - - - - - 5 - - - - - - (C-3) - - - - - - - - - 5 - - - - - (D) Heat stabilizer (parts by weight *) (D-1) 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 (D-2) 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 (E) Ultraviolet absorber (parts by weight *) (E-1) 0.5 0.5 0.3 0.5 0.3 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 (E-2) 0.1 0.1 - 0.1 - 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Weatherability (ΔE) 2.15 1.78 2.21 1.66 2.01 2.25 1.83 3.68 3.12 3.34 3.48 2.03 3.75 3.59 2.38 Glossiness (%) -38 -41 -39 -40 -36 -42 -39 -64 -48 -53 -58 -35 -72 -68 -40 Impact strength (kgf · cm / cm) 6.8 6.2 6.2 6.6 6.2 7.0 6.9 6.5 6.2 6.1 6.3 3.2 7.0 6.9 3.3

Parts by weight: 100 parts by weight of a total amount of (A) a polyester resin, (B) a glass fiber and (C) a polyalkyl (meth) acrylate.

(C) a polyalkyl (meth) acrylate having a weight average molecular weight of 80,000 to 130,000 g / mol, (D) a polyalkyl (meth) acrylate having a weight average molecular weight of 80,000 to 130,000 g / mol, (A), (B) and (C) were used in an amount of 3 to 10% by weight based on the total amount of the polyalkyl (meth) acrylate and the heat stabilizer and the ultraviolet absorber. , It is confirmed that the weather resistance and appearance characteristics are superior to those of Comparative Examples 1 to 8.

Specifically, in Comparative Examples 1 and 6 which did not contain the polyalkyl (meth) acrylate, it was confirmed that the weather resistance and gloss were not good.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. As will be understood by those skilled in the art. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (11)

(A) a polyester resin;
(B) glass fibers;
(C) a polyalkyl (meth) acrylate having a weight average molecular weight of 80,000 to 130,000 g / mol;
(D) a heat stabilizer; And
(E) an ultraviolet absorber,
Wherein the polyalkyl (meth) acrylate (C) is contained in an amount of 3 to 10% by weight based on the total amount of the components (A), (B) and (C).
The method according to claim 1,
The glass fiber-reinforced polyester resin composition
40 to 80% by weight of the polyester resin (A);
10 to 50% by weight of the glass fiber (B);
3 to 10% by weight of the polyalkyl (meth) acrylate (C);
0.1 to 5 parts by weight of the heat stabilizer (D) relative to 100 parts by weight of the total amount of (A), (B) and (C) And
And 0.1 to 5 parts by weight of the ultraviolet absorber (E) based on 100 parts by weight of the total of the components (A), (B) and (C).
The method according to claim 1,
The polyester resin (A) may be at least one selected from the group consisting of polyethylene terephthalate resin, polytrimethylene terephthalate resin, polybutylene terephthalate resin, polyhexamethylene terephthalate resin, polycyclohexanedimethylene terephthalate resin, By weight based on the total weight of the glass fiber reinforced polyester resin composition.
The method according to claim 1,
Wherein the polyalkyl (meth) acrylate (C) has a weight average molecular weight of 90,000 to 110,000 g / mol.
The method according to claim 1,
Wherein the polyalkyl (meth) acrylate (C) is contained in an amount of 5 to 7% by weight based on the total amount of (A), (B) and (C).
The method according to claim 1,
Wherein the heat stabilizer (D) comprises a hindered phenolic compound, a phosphite compound, a phosphate compound, or a combination thereof.
The method according to claim 1,
The heat stabilizer (D) may be at least one selected from the group consisting of 2,6-di-tetra-butyl-4-methylphenol, octadecyl-3- (3,5- (3,5-di-t-butyl-4-hydroxyphenyl) butanoic acid) glycol ester, tetrabis (methylene- (2,4-t-butylphenyl) phosphite, tris (nonylphenyl) phosphite, diisobutylphosphite, diphenyl-iso-octylphosphite, Wherein the glass fiber reinforced polyester resin composition is a glass fiber reinforced polyester resin composition.
The method according to claim 1,
Wherein the ultraviolet absorber comprises a benzotriazole compound, a benzophenone compound, or a combination thereof.
The method according to claim 1,
The ultraviolet absorber (E) may be at least one selected from the group consisting of 2- (2-hydroxy-5-methylphenyl) -2H-benzotriazole, hydroxy-3,5-di (1,1-dimethylbenzyl) Phenol-1,2- (2H-benzotriazol-2-yl) -4- (4-fluorophenyl) Methyl-6-dodecyl, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-hexyloxy-phenol, a compound represented by the following formula ≪ / RTI > wherein the glass fiber reinforced polyester resin composition comprises a combination.
[Chemical Formula 1]

The method according to claim 1,
Wherein the heat stabilizer (D) and the ultraviolet absorber (E) are contained in a weight ratio of 2: 1 to 1: 3.
A molded article produced by using the glass fiber-reinforced polyester resin composition according to any one of claims 1 to 10.