KR101852241B1 - Polyester resin composition and article using the same - Google Patents
Polyester resin composition and article using the same Download PDFInfo
- Publication number
- KR101852241B1 KR101852241B1 KR1020150190384A KR20150190384A KR101852241B1 KR 101852241 B1 KR101852241 B1 KR 101852241B1 KR 1020150190384 A KR1020150190384 A KR 1020150190384A KR 20150190384 A KR20150190384 A KR 20150190384A KR 101852241 B1 KR101852241 B1 KR 101852241B1
- Authority
- KR
- South Korea
- Prior art keywords
- polyester resin
- resin composition
- weight
- dicarboxylic acid
- crystalline polyester
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
- C08L67/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to a crystalline polyester resin, an amorphous polyester resin having a glass transition temperature of 90 ° C or higher, and an inorganic filler, wherein the weight ratio of the crystalline polyester resin to the amorphous polyester resin is 1: 1 to 3: 1 < / RTI >
Description
The present invention relates to a polyester resin composition and a molded article using the same. More specifically, the present invention relates to a polyester resin composition which greatly improves the resistance to deformation without deteriorating the inherent physical properties of the polyester and a molded article using the same.
The thermoplastic resin composition has a lower specific gravity than glass and metal and is excellent in properties such as moldability and impact resistance and is useful for a housing for an electric / electronic product, an automobile interior / exterior material, and a building exterior material. In particular, with the recent trend toward larger and lighter electric / electronic products, plastic products using thermoplastic resins are rapidly replacing existing glass and metal areas.
Among them, polyester resins such as PolyEthylene Terephtalate (PET) have excellent properties such as weather resistance, impact resistance, chemical resistance and high gloss, and are utilized in various fields.
However, since polyethylene terephthalate is hydrolyzed at a high temperature and has a low glass temperature, it is not suitable for use in parts that require high heat resistance, such as electrical and electronic products and automobile interior and exterior materials.
Accordingly, a technique has been proposed in which a filler such as glass fiber or a crystalline polyester resin such as polybutylene terephthalate is mixed to improve the heat resistance of the polyester resin. However, in the case of using a crystalline polyester resin, shrinkage due to crystallization occurs to cause product deformation, and dimensional stability is poor.
In order to prevent this, it may be considered to reduce the content of the glass fiber or mix the amorphous polyester resin. In this case, however, the excellent physical properties inherent to the crystalline polyester resin such as heat resistance and impact resistance are deteriorated So that it is vulnerable to damage by an external impact.
Therefore, development of a polyester resin composition having excellent impact resistance, heat resistance and dimensional stability is required.
A related prior art is Korean Patent Laid-Open No. 10-2002-0062403.
An object of the present invention is to provide a polyester resin composition capable of realizing excellent dimensional stability while minimizing deterioration of physical properties of a crystalline polyester resin such as impact resistance and heat resistance.
It is still another object of the present invention to provide a molded article formed from the polyester resin composition.
In one aspect, the present invention provides a crystalline polyester resin composition comprising a crystalline polyester resin, an amorphous polyester resin having a glass transition temperature of 90 ° C or higher, and an inorganic filler, wherein the weight ratio of the crystalline polyester resin to the amorphous polyester resin is 1: 1 to 3: 1.
The crystalline polyester resin may include a polybutylene terephthalate resin.
The amorphous polyester resin may include a dicarboxylic acid component and a diol component, and may include 40 to 60 wt% of cyclohexanedimethanol as the diol component. The dicarboxylic acid component may include terephthalic acid and isophthalic acid have. At this time, the weight ratio of terephthalic acid and isophthalic acid is preferably 95: 5 to 70:30.
According to one embodiment, the polyester resin composition comprises 30 wt% to 60 wt% of a crystalline polyester resin, 10 wt% to 40 wt% of an amorphous polyester resin, and 10 wt% to 60 wt% of an inorganic filler can do.
The polyester resin composition may further contain additives selected from the group consisting of an ultraviolet absorber, an inorganic additive, a flame retardant, a lubricant, a plasticizer, a heat stabilizer, an antioxidant, a light stabilizer, a pigment, can do.
The polyester resin composition may have a warpage value of 10 mm or less, preferably 8 mm or less, after molding a specimen having a size of 10 cm x 10 cm x 1.0 mm and aging at 25 ° C and 80% RH for 24 hours .
The polyester resin composition was prepared by molding a specimen having a size of 10 cm × 10 cm × 1.0 mm and aging the specimen at 25 ° C. and 80% RH for 24 hours, and then measuring the specimen using a Dupont drop test The impact resistance may be 60 cm or more, preferably 60 cm to 70 cm.
In another aspect, the present invention provides a molded article formed using the polyester resin composition of the present invention.
The polyester resin composition of the present invention is excellent in impact resistance, heat resistance and dimensional stability, and can be molded and used for various electronic products by molding using a method such as high temperature mold injection.
Hereinafter, the present invention will be described more specifically.
The polyester resin composition according to one embodiment of the present invention comprises (A) a crystalline polyester resin, (B) an amorphous polyester resin having a glass transition temperature of 90 ° C or higher, and (C) an inorganic filler, The weight ratio of the crystalline polyester resin (A) to the amorphous polyester resin (B) is 1: 1 to 3: 1, preferably 1.5: 1 to 2.5: 1.
The inventors of the present invention have found that when a non-crystalline polyester resin having a specific glass transition temperature is blended with a crystalline polyester resin in a specific weight ratio, the inventors have found that the inherent properties of a crystalline polyester resin such as heat resistance, impact resistance, And the dimensional stability can be improved without fail, and the present invention has been completed.
Hereinafter, each component of the polyester resin composition of the present invention will be described in detail.
(A) a crystalline polyester resin
The crystalline polyester resin used in the present invention is a polymer obtained by condensation polymerization of a diol compound with terephthalic acid or dimethyl terephthalate directly through an esterification reaction or transesterification reaction, and is a resin having a crystal structure in a molecule.
Examples of the diol compound include ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 2,2-dimethyl-1,3-propanediol, Butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, and the like, but not limited thereto.
Specifically, the crystalline polyester resin may be polybutylene terephthalate, polyethylene terephthalate, polypropylene terephthalate or polytetraethylene terephthalate, polyhexamethylene terephthalate and the like. Of these, polybutylene terephthalate Is particularly preferable.
The polybutylene terephthalate resin may be prepared by condensation of 1,4-butanediol with terephthalic acid or dimethyl terephthalate directly through an esterification reaction or an ester exchange reaction. At this time, isophthalic acid or dimethylisophthalate may be included together with terephthalic acid or dimethyl terephthalate. The content of isophthalic acid or dimethylisophthalate may be less than 4 wt%, more preferably less than 2 wt%, based on the total amount of dicarboxylic acid.
On the other hand, the crystalline polyester resin preferably has a melting point of 200 ° C to 270 ° C. When the melting point of the crystalline polyester resin satisfies the above range, more excellent moldability and impact resistance can be realized.
The crystalline polyester resin may be contained in an amount of 30% by weight to 60% by weight, preferably 35% by weight to 55% by weight, based on the total weight of the polyester resin composition. When the content of the crystalline polyester resin satisfies the above range, there is an advantage of excellent balance of impact resistance, heat resistance, dimensional stability and mechanical properties of the entire composition.
(B) amorphous polyester resin
Next, the amorphous polyester resin is a polymer of a dicarboxylic acid component and a diol component, and is a polyester resin in which a crystal structure is not formed in the molecular structure. Specifically, the amorphous polyester resin may be a resin in which a part of the dicarboxylic acid component and / or the diol component is modified, and preferably a part of the diol component may be a polyester resin modified with cyclohexane dimethanol .
For example, the amorphous polyester resin may be prepared by polymerizing a diol component containing 40% by weight to 60% by weight of cyclohexanedimethanol among all the diol components and a dicarboxylic acid component through esterification or transesterification Modified polyester resin.
Examples of the diol component other than cyclohexanedimethanol include ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 2,2-dimethyl-1,3-propanediol, , 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, and the like. Of these, ethylene glycol is preferable. For example, the diol component may be a mixture of cyclohexanedimethanol and ethylene glycol. In this case, the cyclohexane dimethanol may be contained in an amount of 40 to 60 wt% of the total diol component, and the ethylene glycol may be contained in an amount of 40 to 60 wt% of the total diol component.
In this case, as the dicarboxylic acid component, terephthalic acid (TPA), isophthalic acid (IPA), 1,2-naphthalene dicarboxylic acid, 1,4-naphthalene dicarboxylic acid , 1,5-naphthalene dicarboxylic acid, 1,6-naphthalene dicarboxylic acid, 1,7-naphthalene dicarboxylic acid, 1,8-naphthalene dicarboxylic acid, 2,3-naphthalene dicarboxylic acid , Aromatic dicarboxylic acids such as 2,6-naphthalene dicarboxylic acid and 2,7-naphthalene dicarboxylic acid, dimethyl terephthalate (DMT), dimethyl isophthalate, dimethyl-1, Naphthalate, dimethyl-1,7-naphthalate, dimethyl-1,7-naphthalate, dimethyl-1,8-naphthalate, dimethyl- Aromatic dicarboxylates such as dimethyl-2,6-naphthalate and dimethyl-2,7-naphthalate, and the like can be used. The dicarboxylic acid component may be used alone or in combination of two or more.
Preferably, the dicarboxylic acid component may be a mixture of terephthalic acid and isophthalic acid. At this time, the weight ratio of terephthalic acid and isophthalic acid in the dicarboxylic acid component may be 95: 5 to 70:30.
On the other hand, the amorphous polyester resin used in the present invention may have a glass transition temperature of 90 占 폚 or higher, preferably 90 占 폚 to 110 占 폚. If the glass transition temperature of the amorphous polyester resin is less than 90 占 폚, the impact resistance and dimensional stability characteristics are deteriorated.
Meanwhile, in the present invention, the amorphous polyester resin may be contained in an amount of 10% by weight to 40% by weight, preferably 15 to 35% by weight, based on the total weight of the resin composition. When the content of the amorphous polyester resin satisfies the above range, there is an advantage that the balance of the whole composition such as impact resistance, heat resistance, dimensional stability and mechanical properties is excellent.
In the present invention, the weight ratio of the crystalline polyester resin (A) to the amorphous polyester resin (B) is 1: 1 to 3: 1, preferably 1.5: 1 to 2.5: 1. According to the studies of the present inventors, when the blend ratio of the crystalline polyester resin and the amorphous polyester resin is out of the above range, it is found that at least one of the impact resistance and the dimensional stability is lowered.
(C) inorganic filler
The inorganic filler (C) used in the present invention can improve the mechanical strength of the polyester resin composition, and known inorganic fillers can be used without limitation. The form of the inorganic filler may be fiber type, particle type, rod type, needle type, flake type, amorphous type and the like. In addition, the inorganic filler may have various shapes such as a circle, an ellipse, and a rectangle. For example, as the inorganic filler, fibrous inorganic filler including glass fiber, carbon fiber, ceramic fiber, metal fiber and the like, or glass beads, carbon black, mica, talc, wollastonite, calcium carbonate, Aluminum, clay and whiskers may be used alone or in combination of two or more.
From the viewpoint of mechanical properties, the inorganic filler (C) is preferably a glass fiber. The glass fibers may be glass fibers of circular and / or rectangular cross-section. The glass fiber having a circular section may have a cross-sectional diameter of 5 to 20 탆 and a length before processing of 2 to 20 mm. The glass fibers having the rectangular cross section may have an aspect ratio of 1.5 to 10 and a length before processing of 2 to 20 mm. When such a glass fiber is used as the inorganic filler, the workability is improved and the mechanical properties such as the bending strength and the impact strength of the molded article are excellent.
On the other hand, as the inorganic filler (C), a surface treatment agent is coated on the surface of the inorganic filler to increase the bonding force with the polyester resin. The surface treating agent may be, for example, a silane compound, a urethane compound or an epoxy compound, but is not limited thereto.
The content of the inorganic filler (C) may be 10 wt% to 60 wt%, preferably 20 wt% to 50 wt% based on the total weight of the resin composition. When the content of the inorganic filler satisfies the above range, there is an advantage of excellent balance of impact resistance, heat resistance, dimensional stability and mechanical properties of the entire composition.
The polyester resin composition of the present invention may further contain usual additives in addition to the above-described components in accordance with the intended use. Examples of the additives include antimicrobial agents, heat stabilizers, antioxidants, mold release agents, light stabilizers, surfactants, coupling agents, plasticizers, compatibilizers, lubricants, antistatic agents, flame retardants, flame retardants, anti-drip agents, weathering stabilizers, ultraviolet absorbers, And a mixture thereof.
The additive may be appropriately contained within a range that does not impair the physical properties of the polyester resin composition. Specifically, the additive may be contained in an amount of 20 parts by weight or less, for example, 0.1 to 15 parts by weight, based on 100 parts by weight of the polyester resin composition have.
The polyester resin composition of the present invention can be prepared by a known method. For example, each component and additives may be mixed with a Henschel mixer, a V blender, a tumbler blender, a ribbon blender, etc., and then melt-extruded in an extruder to produce a pellet.
The polyester resin composition of the present invention as described above is excellent in dimensional stability because of less occurrence of warpage after molding. Specifically, the polyester resin composition is prepared by molding a specimen having a size of 10 cm x 10 cm x 1.0 mm and aging the specimen at 25 DEG C and 80% RH for 24 hours, and measuring a warpage value of 10 mm or less, 8 mm or less.
Further, the polyester resin composition of the present invention is excellent in impact resistance. Specifically, the polyester resin composition was prepared by molding a specimen having a size of 10 cm × 10 cm × 1.0 mm, aging the specimen at 25 ° C. and 80% RH for 24 hours, and then using a Dupont drop test The measured impact resistance may be 60 cm or more, preferably 60 cm to 70 cm.
The molded article according to the present invention is formed from the polyester resin composition. For example, the polyester resin composition can be used to produce a molded article by a known molding method such as injection molding, double injection molding, blow molding, extrusion molding, and thermoforming. The molded article to which the polyester resin composition is applied is excellent in impact resistance and dimensional stability and can be usefully used as an exterior material for electronic products.
Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the present invention is not limited to the following examples.
Example
The specifications of each component used in the following examples and comparative examples are as follows.
(A) Crystalline polyester resin: Polybutylene terephthalate (Shinite K006, Shinkong) was used.
(B) Amorphous polyester resin (b1) Puratan0502 (SK chemical) having a glass transition temperature of 105 占 폚 was used.
(b2) Durastar DS2010 (Eastman) having a glass transition temperature of 90 占 폚 was used.
(b3) Tritan LX200 (Eastman) having a glass transition temperature of 110 캜 was used.
(b4) SKYPET1100 (SK chemical) having a glass transition temperature of 70 占 폚 was used.
(b5) JN200 (SK chemical) having a glass transition temperature of 77 was used.
(C) Inorganic filler: Glass fiber (Nittobo) having a length of 3 mm and an aspect ratio of 4 was used.
Examples and Comparative Examples
Each component was blended in the amounts shown in Table 1 below and dry blended, and then processed at a nozzle temperature of 270 DEG C using a twin-screw extruder having a diameter of 45 mm to prepare pellets. At this time, the components other than the glass fiber were fed into the main feeder and the glass fibers were fed into the side feeder. The prepared pellets were dried at 100 ° C for 4 hours or more, and then injected at a molding temperature of 260 ° C and a mold temperature of 120 ° C in a 10 oz injection machine to prepare specimens. The properties of the prepared specimens were evaluated by the following methods, and the results are shown in Table 1 below.
How to measure property
(1) Impact resistance (unit: cm): Flat plate specimens having a thickness of 1 mm, a width of 10 cm and a length of 10 cm were injected and aged under constant temperature and humidity (25 ° C, 80%) for 24 hours. (Dupont drop test) was used to measure the height at which more than 20 specimens were impacted and 50% of the specimens were destroyed.
(2) Warpage (mm): Flat plate specimens having a thickness of 1 mm, a width of 10 cm and a length of 10 cm were extruded and aged at constant temperature and humidity (25 ° C, 80%) for 24 hours. The height of the vertex of the flat specimen was measured in mm after the three vertices of the flat specimen were brought into close contact with the floor, and then the height of the vertex was measured.
(wt%)
(mm)
It can be seen from Table 1 that the compositions of Examples 1 to 3 have the same level of impact resistance as those of the compositions of Comparative Examples 1 to 5, and improved warping characteristics. On the other hand, Comparative Example 1 in which amorphous resin was not used exhibited both reduced impact resistance and warpability. Comparative Examples 2 and 3 using amorphous resins having a glass transition temperature of less than 90 占 폚 were excellent in impact resistance, . In addition, in Comparative Examples 4 and 5 in which the content of the crystalline resin and the amorphous resin are outside the range of the present invention, it can be confirmed that one of the impact resistance and the warpage characteristics is inferior to the present invention.
Claims (10)
Amorphous polyester resin having a glass transition temperature of 90 ° C or higher; And
An inorganic filler,
Wherein the weight ratio of the crystalline polyester resin to the amorphous polyester resin is 1: 1 to 3: 1.
Wherein the crystalline polyester resin comprises a polybutylene terephthalate resin.
Wherein the amorphous polyester resin comprises a dicarboxylic acid component and a diol component, and the diol component comprises 40 to 60 wt% of cyclohexanedimethanol.
Wherein the amorphous polyester resin comprises a dicarboxylic acid component and a diol component, and the dicarboxylic acid component comprises terephthalic acid and isophthalic acid.
Wherein the weight ratio of terephthalic acid and isophthalic acid is 95: 5 to 70: 30.
30% to 60% by weight of a crystalline polyester resin;
10% to 40% by weight of an amorphous polyester resin; And
And 10% by weight to 60% by weight of an inorganic filler.
Wherein the polyester resin composition further comprises an additive selected from the group consisting of an ultraviolet absorber, an inorganic additive, a flame retardant, a lubricant, a plasticizer, a heat stabilizer, an antioxidant, a light stabilizer, a pigment, a dye and a mixture thereof.
Wherein the polyester resin composition has a warpage value of 10 mm or less measured after molding a specimen of 10 cm x 10 cm x 1.0 mm size and aging at 25 DEG C and 80% relative humidity for 24 hours.
The polyester resin composition was molded into a 10 cm × 10 cm × 1.0 mm specimen, aged at 25 ° C. and 80% RH for 24 hours, and then subjected to a Dupont drop test, Is 60 cm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150190384A KR101852241B1 (en) | 2015-12-30 | 2015-12-30 | Polyester resin composition and article using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150190384A KR101852241B1 (en) | 2015-12-30 | 2015-12-30 | Polyester resin composition and article using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20170079622A KR20170079622A (en) | 2017-07-10 |
| KR101852241B1 true KR101852241B1 (en) | 2018-04-25 |
Family
ID=59355491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150190384A KR101852241B1 (en) | 2015-12-30 | 2015-12-30 | Polyester resin composition and article using the same |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101852241B1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005226039A (en) * | 2004-02-16 | 2005-08-25 | Denki Kagaku Kogyo Kk | Polyester resin composition and mounting film |
-
2015
- 2015-12-30 KR KR1020150190384A patent/KR101852241B1/en active IP Right Grant
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005226039A (en) * | 2004-02-16 | 2005-08-25 | Denki Kagaku Kogyo Kk | Polyester resin composition and mounting film |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170079622A (en) | 2017-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102362818B1 (en) | Polyester resin composition and molded artice manufactured therefrom | |
| WO2009081571A1 (en) | Polybutylene terephthalate resin composition and thin molded article | |
| US10336899B2 (en) | Polybutylene terephthalate resin composition | |
| KR102405366B1 (en) | Thermoplastic resin composition and article produced therefrom | |
| KR101823736B1 (en) | Polyester resin composition and article using the same | |
| KR102252550B1 (en) | Thermoplastic resin composition and article produced therefrom | |
| EP1674527B1 (en) | Flame-retardant injection-molded object | |
| JP4777606B2 (en) | Flame retardant injection molded body | |
| KR100846861B1 (en) | Composition Of Polyester resin | |
| KR20180129438A (en) | Polyester based resin composition and molded article prepared therefrom | |
| KR101852241B1 (en) | Polyester resin composition and article using the same | |
| TWI637023B (en) | Thermoplastic polyester resin composition and molded article | |
| KR20220149903A (en) | Electronic equipment interior material | |
| KR101786185B1 (en) | Polyester resin composition and article comprising the same | |
| JP3633199B2 (en) | Polyester resin composition | |
| KR101854012B1 (en) | Thermoplastic resin composition and article comprising the same | |
| KR101857078B1 (en) | Poly (butylene terephthalate) ester compositions, methods of manufacture, and articles thereof | |
| KR102393506B1 (en) | Thermoplastic resin composition and article produced therefrom | |
| KR20190103824A (en) | Thermoplastic resin composition and article produced therefrom | |
| KR102291177B1 (en) | Thermoplastic resin composition and article produced therefrom | |
| KR20230045238A (en) | Thermoplastic resin composition and article produced therefrom | |
| JP6085466B2 (en) | Method for producing flame-retardant resin molded product | |
| KR20150076642A (en) | Polyester Resin Composition | |
| KR101733198B1 (en) | Polyester composition having high fluidity | |
| CN112020539A (en) | Thermoplastic polyester resin composition and molded article |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| N231 | Notification of change of applicant | ||
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant |