KR100373173B1 - Polyethylene terephthalate resin composition having excellent light blocking property and moldability - Google Patents

Polyethylene terephthalate resin composition having excellent light blocking property and moldability Download PDF

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KR100373173B1
KR100373173B1 KR1019960054999A KR19960054999A KR100373173B1 KR 100373173 B1 KR100373173 B1 KR 100373173B1 KR 1019960054999 A KR1019960054999 A KR 1019960054999A KR 19960054999 A KR19960054999 A KR 19960054999A KR 100373173 B1 KR100373173 B1 KR 100373173B1
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pet
resin composition
polyethylene terephthalate
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KR19980036433A (en
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김웅한
이승환
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주식회사 코오롱
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    • 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
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • 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
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • 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

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Abstract

PURPOSE: Provided is a polyethylene terephthalate resin composition, which has excellent light blocking property and a high crystallization degree even at a mold temperature of 100 deg.C or less so that it can be easily injection molded. CONSTITUTION: The polyethylene terephthalate(PET) resin composition comprises a PET resin as a main component, a fiber reinforcing agent, a nucleating agent, a release agent, and a heat-resistant agent. The PET resin composition further comprises 1-10 parts by weight of a PET-salt and 0.5-2.0 parts by weight of a metal acetate, based on 100 parts by weight of the PET resin. Particularly, the PET-salt is at least one salt selected from the group consisting of compounds of formula 1 and formula 2, wherein M is a monovalent or divalent metal, and n is an integer of 5-50.

Description

차광성 및 성형성이 우수한 폴리에틸렌테레프탈레이트 수지 조성물A polyethylene terephthalate resin composition excellent in light shielding property and moldability

본 발명은 폴리에틸렌테레프탈레이트(이하 PET라고 함) 수지 조성물에 관한 것으로서, 특히 금형온도를 낮추어 100℃ 이하의 온도에서도 쉽게 사출할 수 있어 성형성이 좋으며 빛에 대한 차광성도 우수한 섬유강화 PET 수지 조성물에 관한 것이다.The present invention relates to a polyethylene terephthalate (hereinafter referred to as PET) resin composition, and more particularly, to a fiber-reinforced PET resin composition which can be easily injected even at a temperature of 100 ° C or lower by lowering the mold temperature, .

PET 수지는 강도와 결정 특성이 우수하여 예전부터 섬유, 필름, 병 등의 용도에 많이 적용되어 온 대표적인 폴리에스테르 수지이다. 그러나 PET 수지는 결정화도는 우수하지만 결정화 속도가 늦어 사출을 주로 하는 엔지니어링 프라스틱으로는 가치가 떨어진다. 따라서 PET 수지에 핵제, 유리섬유, 가소제 등의 첨가제를 혼합하여 결정화 속도를 향상시키고, 내충격 특성을 부여하여 PET 자체의 우수한 강도와 조화를 맞추면서 엔지니어링 플라스틱으로서의 사용 가치를 가지게 되었다. 이러한 각종 첨가제를 혼용함으로서 PET 수지는 수분에 대한 저항성과 강도 특성이 향상되어 폴리부틸렌테레프탈레이트 수지와 함께 전기, 전자 부품 등에 널리 사용되고 있다.PET resin is a representative polyester resin which has been widely used for applications such as fiber, film and bottle since it has excellent strength and crystal properties. However, the PET resin is excellent in crystallinity, but its crystallization rate is slow, which is not worth the engineering plastic, which is mainly used for injection molding. Therefore, by adding additives such as nucleating agent, glass fiber, and plasticizer to the PET resin, the crystallization speed is improved and the impact resistance property is imparted. By mixing these various additives, the PET resin has improved resistance to moisture and strength and is widely used in electrical and electronic parts together with polybutylene terephthalate resin.

한편, 섬유강화 PET 수지 조성물은 PET를 주재로 사용하기 때문에 유리전이온도가 매우 높아 강성과 내열성은 우수하지만 성형시 효과적인 보압작용과 제품의 결정화를 위해서는 130℃ 이상의 온도에서 사출하여야 한다. 그러나 현실적으로 사출시 100℃ 이상의 금형온도를 유지하기 위해서 물이 아닌 다른 열매를 이용하는 것은 불가능하고, 통상 물을 이용해 90℃ 이하의 금형온도를 적용하고 있다. 이때에는 금형온도가 금형내에서 수지가 흘러 들어가고 적절한 속도로 결정화되면서 결정화에 의한 체적 감소를 보압에 의해 보상받아 표면에 씽크 등의 불량이 발생하여 성형수축율이 적은 제품을 제조하기가 어렵다. 이는 100℃ 이하의 낮은 금형온도 때문에 수지 체인의 유동성이 저하되어 결정을 형성하기에는 다소 높은 점도가 되므로 결정화가 지연되기 때문이다.On the other hand, since the fiber reinforced PET resin composition is mainly made of PET, the glass transition temperature is very high so that the stiffness and the heat resistance are excellent. However, in order to effectively perform the pressure-holding action and crystallize the product, However, in reality, it is impossible to use a non-water-based fruit to maintain a mold temperature of 100 ° C or higher at the time of injection, and a mold temperature of 90 ° C or lower is usually applied using water. At this time, it is difficult to manufacture a product having a low molding shrinkage rate due to defects such as sinking on the surface due to the compensation of the volume reduction due to crystallization by the pressure of the mold as the resin flows in the mold and crystallizes at a proper speed. This is because the fluidity of the resin chain is lowered due to a low mold temperature of 100 DEG C or less and crystallization is delayed because the viscosity is somewhat high for forming crystals.

그리고 일부 사출성형기는 금형온도를 기름이나, 전기를 이용하여 100℃ 이상으로 조절할 수는 있으나, 금형온도가 너무 높으면 금형내의 온도 편차가 너무 심하여 균일한 온도를 유지하기가 어렵고, 이로 인해 사출성형된 성형품에 휨이 발생하여 외관 및 치수안정성을 중시하는 성형품에 오점을 발생시키며, 주변 설비의 유지비가 많은 단점도 가지고 있다.In some injection molding machines, the mold temperature can be controlled to 100 ° C. or higher by using oil or electricity. However, if the mold temperature is too high, the temperature deviation within the mold becomes too great to maintain a uniform temperature. There is a disadvantage in that a molding is warped to cause a defect in a molded article which emphasizes appearance and dimensional stability, and the maintenance cost of peripheral equipment is large.

또한 전기, 전자 분야에서 조명기기에 적용되는 PET 수지는 백색도 및 차광성을 위하여 일반적으로 이산화티탄을 첨가하는데, 빛에 의한 분해로 물성 및 수지의 색상이 변색되어 외관 및 차광성이 떨어지는 문제를 가지고 있다.In addition, PET resin applied to lighting equipment in electric and electronic fields is generally added with titanium dioxide for whiteness and light shielding property, and has a problem in that appearance and light shielding property are deteriorated due to discoloration of physical properties and resin due to decomposition by light have.

본 발명의 목적은 빛에 대한 차단성이 우수하고 100℃ 이하의 금형온도에서도 결정화도가 우수하여 쉽게 사출할 수 있는 차광성 및 성형성이 우수한 폴리에틸렌테레프탈레이트 수지 조성물을 제공하는 데에 있다.An object of the present invention is to provide a polyethylene terephthalate resin composition which is excellent in light-shielding property and excellent in light-shielding property and moldability which can be easily injected because of its excellent crystallinity even at a mold temperature of 100 ° C or lower.

상기 본 발명의 목적을 달성하기 위한 차광성 및 성형성이 우수한 폴리에틸렌테레프탈레이트 수지 조성물은, PET 수지를 주제로 하고 여기에 섬유강화제(보강제), 핵제, 이형제, 내열제 등을 첨가하여 조성하는 PET 수지 조성물에 있어서, 상기 PET 수지 100중량부에 대해 추가로 PET-염 1∼10중량부와 금속아세테이트 0.5∼2.0중량부를 더 첨가하여 조성되는 데에 그 특징이 있다.The polyethylene terephthalate resin composition excellent in light shielding property and moldability for achieving the object of the present invention is a PET resin which is made by adding a fiber reinforcing agent (reinforcing agent), a nucleating agent, a releasing agent, In the resin composition, 1 to 10 parts by weight of a PET salt and 0.5 to 2.0 parts by weight of a metal acetate are further added to 100 parts by weight of the PET resin.

PET-염으로는 하기 식 1 또는 식 2로 표시되는 화합물를 사용하며, 금속아세테이트로는 금속이 망간, 마그네슘, 칼슘인 망간아세테이트, 마그네슘아세테이트, 칼슘아세테이트 등을 사용하는 것이 좋다.As the PET salt, a compound represented by the following formula 1 or 2 may be used. As the metal acetate, manganese, magnesium, calcium manganese acetate, magnesium acetate, calcium acetate or the like is preferably used as the metal.

[식1][Formula 1]

[식2][Formula 2]

상기 식1 및 식2에서 M은 1가 또는 2가 금속이고, n은 5∼50의 정수이다.In the above formulas 1 and 2, M is a monovalent or divalent metal, and n is an integer of 5 to 50.

본 발명의 수지 조성물에 사용되는 원료에 대해 자세히 설명한다.The raw materials used in the resin composition of the present invention are described in detail.

식 1 또는 식 2로 표시되는 PET-염은 수지의 성형성을 향상시키기 위해 사용하는 것으로, 분자량은 5,000 이상, 바람직하게는 5000∼13,000의 것을 사용한다.이는 PET 수지 100중량부에 대해 1중량부 미만으로 첨가되면 그 효과를 전혀 볼 수 없으며 10중량부르 초과하면 성형성이 좋지 않고 경제성이 떨어진다. 따라서 첨가량은 PET 수지 100중량부에 대해 1∼10중량부인 것이 좋다. 이의 사용에 의해 PET 수지의 결정화속도(DSC 이용 220℃ 등온에서 측정)는 180초에서 80초로 단축되는 효과를 볼 수 있다.The PET-salt represented by the formula 1 or 2 is used for improving the moldability of the resin, and has a molecular weight of 5,000 or more, preferably 5000 to 13,000. If it is added in an amount of less than 10 parts by weight, the effect can not be observed at all. If it exceeds 10 parts by weight, moldability is poor and economical efficiency is low. Therefore, the addition amount is preferably 1 to 10 parts by weight per 100 parts by weight of the PET resin. The effect of the crystallization rate (measured at isothermal temperature of 220 ° C using DSC) of the PET resin is reduced from 180 seconds to 80 seconds by the use thereof.

금속아세테이트로는 망간아세테이트, 마그네슘아세테이트, 칼슘아세테이트 등을 PET 수지 100중량부에 대하여 0.5∼2.0중량부 첨가한다. 첨가량이 0.5중량부 미만이면 빛에 대한 차광성의 효과가 미미하고 2.0중량부를 초과하면 차광성의 증진 효과가 미미하다.As the metal acetate, manganese acetate, magnesium acetate, calcium acetate and the like are added in an amount of 0.5 to 2.0 parts by weight based on 100 parts by weight of the PET resin. If the addition amount is less than 0.5 parts by weight, the effect of shielding against light is insignificant. If the addition amount exceeds 2.0 parts by weight, the effect of improving light shielding is insignificant.

핵제는 분산성이 뛰어나고 조성물내에 동시에 결정화가 일어날 수 있는 것으로서, 입경이 0.1∼10㎛인 물질을 사용한다. 이러한 핵제로는 마이카, 실리카, 카오린, 운모, 탈크, 탄산칼슘, 탄산마그네슘, 나트륨 벤조에이트 등이 있다. 첨가량은 PET 수지 100중량부에 대하여 0.1∼10 중량부, 바람직하게는 0.1∼5 중량부가 적절하다. 첨가량이 0.1중량부 미만이면 결정핵 생성이 균일하지 않으며 10중량부를 초과하면 수지의 물성이 현저히 떨어진다.The nucleating agent is excellent in dispersibility and can crystallize simultaneously in the composition, and a material having a particle diameter of 0.1 to 10 mu m is used. Such nucleating agents include mica, silica, kaolin, mica, talc, calcium carbonate, magnesium carbonate, sodium benzoate and the like. The addition amount is 0.1 to 10 parts by weight, preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the PET resin. If the addition amount is less than 0.1 part by weight, crystal nucleation is not uniform, and if it exceeds 10 parts by weight, the physical properties of the resin are remarkably deteriorated.

섬유보강재로는 유리단섬유, 탄소섬유 등을 사용할 수 있으며, PET 수지 100중량부에 대해 10∼50중량부, 바람직하게는 20∼45중량부 첨가하는 것이 적절하다. 첨가량이 10중량부 미만이면 물성의 향상 효과가 적으며, 50중량부를 초과하면 생산 및 사출후의 성형품 외관이 좋지 않다.As the fiber reinforcing material, short staple fibers and carbon fibers can be used. It is appropriate to add 10 to 50 parts by weight, preferably 20 to 45 parts by weight, to 100 parts by weight of the PET resin. When the amount is less than 10 parts by weight, the effect of improving the physical properties is small. When the amount is more than 50 parts by weight, appearance of the molded article after production and injection is not good.

내열제로는 구리계, 힌더드페놀계, 아민계, 인계, 황계 등의 내열제를 사용한다. 내열제의 첨가량이 PET 수지 100 중량부에 대하여 0.05∼2.0중량부가 적당하며, 바람직하기로는 0.1∼1.0 중량부가 적절하다. 첨가량이 0.1중량부 미만이면 내열성의 증가 효과가 미미하고 1.0 중량부 이상 첨가하더하도 더 이상의 내열성 상승 효과를 볼 수 없으므로 무의미하다.As the heat resisting agent, a heat resisting agent such as a copper-based, hindered phenol-based, amine-based, phosphorus-based, or sulfur-based agent is used. The amount of the heat resistant agent added is suitably 0.05 to 2.0 parts by weight, preferably 0.1 to 1.0 part by weight, based on 100 parts by weight of the PET resin. If the addition amount is less than 0.1 part by weight, the effect of increasing the heat resistance is insignificant, and even if 1.0 part by weight or more is added, the synergy of heat resistance can not be further improved.

이형제로는 알루미늄스테아레이트, 나트륨스테아레이트, 마그네슘스테아레이트, 네오펜틸글리콜디벤조에이트, 칼슘스테아레이트, 이미드왁스 등을 사용할 수 있다. 그 첨가량은 PET 수지 100중량부에 대하여 0.2∼0.3중량부가 적당하다. 첨가량이 0.2 중량부 미만이면 사출성형시 이형 효과가 미미하고 3.0 중량부를 초과하면 성형품의 강도가 떨어지는 문제점이 발생한다.As the release agent, aluminum stearate, sodium stearate, magnesium stearate, neopentyl glycol dibenzoate, calcium stearate, imide wax and the like can be used. The addition amount thereof is suitably 0.2 to 0.3 parts by weight per 100 parts by weight of the PET resin. If the addition amount is less than 0.2 part by weight, the mold release effect is insignificant at the time of injection molding, and if it exceeds 3.0 parts by weight, the strength of the molded article is lowered.

이와 같이 조성된 본 발명의 PET 수지 조성물의 다음과 같은 과정에 의해 제조된다.The thus prepared PET resin composition of the present invention is produced by the following procedure.

먼저 고유점도가 0.4∼1.0㎗/g(페놀/테트라클로로에탄=1:1중량부의 혼합용액에 중합체 0.5중량부를 용해 25℃에서 측정)인 PET 수지에 대해 상기 식1 또는 식2로 표시되는 화합물을 PET-염을 첨가한다. 그리고 이산화티탄이 첨가된 수지의 빛에 대한 차광성을 향상시키기 위하여 금속아세테이트와, 섬유강화제(보강제)와, 핵제과, 이형제 등을 첨가하여 조성한다.First, the PET resin, which has an intrinsic viscosity of 0.4 to 1.0 dl / g (measured by dissolving 0.5 parts by weight of a polymer in a mixed solution of phenol / tetrachloroethane = 1 part by weight at 25 DEG C) To which a PET-salt is added. In order to improve the light-shielding property of the resin added with titanium dioxide, metal acetate, fiber reinforcing agent (reinforcing agent), nucleating agent, release agent and the like are added.

또한 본 발명의 수지 조성물에 난연성을 부여하기 위하여 브롬계 난연제를 첨가하여도 좋으며, 상기 섬유보강제는 폴리머와의 사용성을 증진시키기 위하여 표면을 실란이나 보란으로 처리하여 사용하는 것이 좋다.In order to impart flame retardancy to the resin composition of the present invention, a bromine-based flame retardant may be added. In order to improve usability with the polymer, the fiber reinforcement is preferably treated with silane or borane.

이하 본 발명을 실시예에 의거 상세히 설명하고자 한다.Hereinafter, the present invention will be described in detail with reference to examples.

각 실시예에서 다음과 같은 방법에 의해 시편을 제조하였다.In each of the examples, a test piece was prepared by the following method.

먼저 PET 수지 100중량부에 대해 이산화티탄 5중량부, PET-금속염 1∼10중량부, 유리섬유(섬유보강재) 10∼50중량부, 내열제 0.1∼2.0중량부, 이형제 0.2∼3.0중량부, 소듐벤조에이트 0.1∼10중량부, 망간아세테이트 0.5∼2.0중량부를 첨가한 후, 트윈스크류 압출기를 이용해 260∼300℃의 온도에서 충분히 용융 혼합한다. 이것을 다이를 통하여 스파게티로 토출한 뒤 냉각하여 펠렛타이저를 이용해 절단하여 칩 상태로 만든다. 이와같이 수득한 수지 조성물을 잘 건조한 후 280∼290℃에서 사출성형기로 성형하여 시험편을 제조한다.First, 5 parts by weight of titanium dioxide, 1 to 10 parts by weight of a PET-metal salt, 10 to 50 parts by weight of glass fibers (fiber reinforcing material), 0.1 to 2.0 parts by weight of a heat resistant agent, 0.2 to 3.0 parts by weight of a release agent, 0.1 to 10 parts by weight of sodium benzoate and 0.5 to 2.0 parts by weight of manganese acetate are added and sufficiently melted and mixed at a temperature of 260 to 300 DEG C by using a twin screw extruder. This is discharged into spaghetti through a die, cooled, and cut using a pelletizer to form chips. The thus-obtained resin composition is dried well and molded into an injection molding machine at 280 to 290 ° C to prepare a test piece.

[실시예 1][Example 1]

건조된 폴리에틸렌테레프탈레이트(PET) 100중량부에 유리단섬유 30중량부, 이형제인 에틸렌비스스테아미드 0.3중량부, 내열제인 이가녹스1010 0.2중량부, 네오펜틸글리콜디벤조에이트 1중량부, PET-염 2중량부, 소듐벤조에이트 1중량부, 망간아세테이트 0.5중량부를 브랜드로 잘 혼합하여 쌍나사압출기로 투입하고 280℃에서 용융혼합하여 다이를 통해 스파게티로 토출하고 냉각시켜 펠렛타이저로 칩 상태로 절단하여 수지 조성물을 만든 후, 130℃에서 5시간 제습형 건조기를 이용하여 형체력이 150톤인 사출성형기를 이용하여 시편을 만들었다.To 100 parts by weight of dried polyethylene terephthalate (PET), 30 parts by weight of short glass fibers, 0.3 part by weight of ethylene bis-stearamide as a mold release agent, 0.2 part by weight of Igaron 1010 as a heat-resistant agent, 1 part by weight of neopentyl glycol dibenzoate, 2 parts by weight of salt, 1 part by weight of sodium benzoate and 0.5 part by weight of manganese acetate were mixed well and mixed by a twin-screw extruder. The mixture was melt-mixed at 280 DEG C and discharged into spaghetti through a die. The resin composition was cut to prepare a specimen using an injection molding machine having a mold clamping force of 150 ton by using a dehumidifying dryer at 130 DEG C for 5 hours.

[실시예 2][Example 2]

PET 수지 100중량부에 대해 PET-염 4중량부, 망간아세테이트 1중량부를 첨가 혼합한 것 이외에는 실시예1과 동일한 조건과 방법으로 시편을 만들었다.Specimens were prepared under the same conditions and in the same manner as in Example 1 except that 4 parts by weight of PET-salt and 1 part by weight of manganese acetate were added to 100 parts by weight of the PET resin.

[실시예 3][Example 3]

PET 수지 100중량부에 대해 PET-염 6중량부, 망간아세테이트 1.5중량부를 첨가 혼합한 것 이외에는 실시예1과 동일한 조건과 방법으로 시편을 만들었다.Specimens were prepared under the same conditions and in the same manner as in Example 1, except that 6 parts by weight of PET-salt and 1.5 parts by weight of manganese acetate were added to 100 parts by weight of the PET resin.

[실시예 4][Example 4]

PET 수지 100중량부에 대해 PET-염 8중량부, 망간아세테이트 2중량부를 첨가 혼합한 것 이외에는 실시예1과 동일한 조건과 방법으로 시편을 만들었다.Specimens were prepared under the same conditions and in the same manner as in Example 1, except that 8 parts by weight of PET-salt and 2 parts by weight of manganese acetate were added to 100 parts by weight of the PET resin.

[실시예 5][Example 5]

PET 수지 100중량부에 대해 PET-염 10중량부, 망간아세테이트 2.0중량부를 첨가 혼합한 것 이외에는 실시예1과 동일한 조건과 방법으로 시편을 만들었다.A specimen was prepared in the same manner as in Example 1 except that 10 parts by weight of a PET-salt and 2.0 parts by weight of manganese acetate were added to 100 parts by weight of a PET resin.

[비교예 1][Comparative Example 1]

건조된 PET 수지 100중량부에 대해 유리단섬유 30중량부, 이형제인 에틸렌비스스테아미드 0.3중량부, 내열제인 이가녹스1010 0.2중량부, 네오펜틸글리콜디벤조에이트 1중량부, 소듐벤조에이트 0.2중량부를 첨가 혼합한 것 이외에는 실시예1과 동럇한 조건 및 방법으로 시편을 만들었다.To 100 parts by weight of the dried PET resin, 30 parts by weight of short glass fibers, 0.3 part by weight of ethylene bis-stearamide as a mold release agent, 0.2 part by weight of Igarox 1010 as a heat-resistant agent, 1 part by weight of neopentyl glycol dibenzoate, Except that the components were added and mixed in the same manner as in Example 1.

[비교예 2][Comparative Example 2]

PET 수지 100중량부에 대해 PET-염 10중량부, 소듐벤조에이트 0.4중량부를 첨가 혼합한 것 이외에는 비교예1과 동일한 조건과 방법으로 시편을 만들었다.Specimens were prepared under the same conditions and in the same manner as in Comparative Example 1 except that 10 parts by weight of PET-salt and 0.4 part by weight of sodium benzoate were added to 100 parts by weight of the PET resin.

[비교예 3][Comparative Example 3]

PET 수지 100중량부에 대해 PET-염 10중량부, 소듐벤조에이트 1.0중량부를 첨가 혼합한 것 이외에는 비교예1과 동일한 조건과 방법으로 시편을 만들었다.A specimen was prepared under the same conditions and in the same manner as in Comparative Example 1, except that 10 parts by weight of the PET-salt and 1.0 part by weight of sodium benzoate were added to 100 parts by weight of the PET resin.

[비교예 4][Comparative Example 4]

PET 수지 100중량부에 대해 PET-염 10중량부, 소듐벤조에이트 2.0중량부를 첨가 혼합한 것 이외에는 비교예1과 동일한 조건과 방법으로 시편을 만들었다.Specimens were prepared under the same conditions and in the same manner as in Comparative Example 1 except that 10 parts by weight of PET-salt and 2.0 parts by weight of sodium benzoate were added to 100 parts by weight of the PET resin.

[비교예 5][Comparative Example 5]

PET 수지 100중량부에 대해 PET-염 10중량부, 소듐벤조에이트 3.0중량부를 첨가 혼합한 것 이외에는 비교예1과 동일한 조건과 방법으로 시편을 만들었다.Specimens were prepared under the same conditions and in the same manner as in Comparative Example 1 except that 10 parts by weight of PET-salt and 3.0 parts by weight of sodium benzoate were added to 100 parts by weight of the PET resin.

상기 각 실시예 및 비교예의 원료 조성을 아래 표1에 나타냈으며, 각 실시예 및 비교예에서 제조한 시편에 대해 물성시험을 실시하였다. 그 결과는 아래의 표2에 나타냈다.The raw material compositions of each of the above Examples and Comparative Examples are shown in Table 1 below, and the specimens prepared in each of the Examples and Comparative Examples were subjected to a physical property test. The results are shown in Table 2 below.

실시예 PET 유리섬유 PET-염 이형제 내열제 가소제 핵제 망간아세테이트Example PET glass fiber PET-salt Release agent Heat resistance Plasticizer Nucleating agent Manganese acetate 실시예1 100 30 2 0.3 0.2 1 1 0.5실시예2 100 30 4 0.3 0.2 1 1 1.0실시예3 100 30 6 0.3 0.2 1 1 1.5실시예4 100 30 8 0.3 0.2 1 1 2.0실시예5 100 30 10 0.3 0.2 1 1 2.0비교예1 100 30 - 0.3 0.2 1 0.2 -비교예2 100 30 - 0.3 0.2 1 0.4 -비교예3 100 30 - 0.3 0.2 1 1 -비교예4 100 30 - 0.3 0.2 1 2 -비교예5 100 30 12 0.3 0.2 1 3 -Example 1 100 30 2 0.3 0.2 1 1 0.5 Example 2 100 30 4 0.3 0.2 1 1 1.0 Example 3 100 30 6 0.3 0.2 1 1 1.5 Example 4 100 30 8 0.3 0.2 1 1 2.0 Example 5 100 30 10 0.3 0.2 1 1 2.0 Comparative Example 1 100 30 - 0.3 0.2 1 0.2 - Comparative Example 2 100 30 - 0.3 0.2 1 0.4 - Comparative Example 3 100 30 - 0.3 0.2 1 1 - Comparative Example 4 100 30 - 0.3 0.2 1 2 - Comparative Example 5 100 30 12 0.3 0.2 1 3 -

실시예Example 인장강도 굴곡탄성율 결정화속도 성형성 색 상Tensile Strength Flexural Modulus Crystallization Rate Moldability Color ㎏/㎠ ㎏/㎠ 초 육안관찰 L치 b치㎏ / ㎠ ㎏ / ㎠ Visual inspection L value b 실시예1 1165 67100 84 양호 77.3 9.3실시예2 1282 71300 80 양호 78.4 7.5실시예3 1500 73000 78 양호 80.6 6.2실시예4 1263 68500 82 양호 76.5 7.1실시예5 1190 66300 86 양호 75.1 9.2비교예1 1050 57200 180 불량 57.3 17.2비교예2 983 55500 176 불량 58.2 16.4비교예3 873 51300 160 양호 63.5 19.4비교예4 896 55100 164 보통 61.5 18.1비교예5 928 56000 166 보통 60.4 15.5Example 1 1165 67100 84 Good 77.3 9.3 Example 2 1282 71300 80 Good 78.4 7.5 Example 3 1500 73000 78 Good 80.6 6.2 Example 4 1263 68500 82 Good 76.5 7.1 Example 5 1190 66300 86 Good 75.1 9.2 Comparative Example 1 1050 57200 180 defective 57.3 17.2 Comparative Example 2 983 55500 176 defective 58.2 16.4 Comparative Example 3 873 51300 160 Good 63.5 19.4 Comparative Example 4 896 55100 164 Normal 61.5 18.1 Comparative Example 5 928 56000 166 Normal 60.4 15.5

* 인장강도 : ASTM D638에 준해 측정함(Q.U.V에 15일 방치후 측정).* Tensile strength: Measured according to ASTM D638 (measured after leaving for 15 days in Q.U.V).

* 굴곡탄성율 : ASTM D790에 준해 측정함(Q.U.V에 15일 방치후 측정).Flexural modulus: Measured according to ASTM D790 (measured after leaving 15 days in Q.U.V).

* 결정화속도 : DSC를 이용해 220℃ 등온에서 결정화속도를 측정함.* Crystallization rate: The crystallization rate is measured at 220 ° C isotherm using DSC.

* 성형성 : 시편 사출시 금형온도 90℃에서의 사출성형성으로, 사출시간, 냉각시간, 표면상태 등으로 판단함.* Moldability: Injection moldability at the mold temperature of 90 ° C during injection of specimen, determined by injection time, cooling time, surface condition, etc.

* 색상(L/b치) : 일광견뢰도 측정기(Q.U.V)로 58℃에서 7시간 조사후 1시간 방치 싸이클로 15일간 방치후 미놀타 CR-310 색차계로 측정함.* Color (L / b value): It is irradiated with light fastness tester (Q.U.V) for 7 hours at 58 ℃ and left for 1 hour. After leaving for 15 days, it is measured with Minolta CR-310 color meter.

상기 표2에서 확인할 수 있듯이, 본 발명에 따른 PET 수지 조성물를 사용하여 제조한 시편은 종래의 이산화티탄이 첨가된 유리섬유강화 PET 수지 조성물에 의한 것 보다 결정화 속도가 월등히 우수하고, 저온의 금형온도에서도 PET 수지의 고유 특성을 나타내며, 빛에 대한 차광성도 우수하다.As can be seen from the above Table 2, the specimens prepared using the PET resin composition according to the present invention exhibited significantly higher crystallization rates than the conventional glass fiber-reinforced PET resin compositions to which titanium dioxide was added, It shows inherent characteristics of PET resin and it is excellent in light shielding property against light.

이상에서 상세히 설명한 바와 같이, 본 발명의 PET 수지 조성물은 PET에 대해 적량의 PET-금속염과 금속아세테이트를 첨가함으로서 빛에 대한 차단성이 우수하고 100℃ 이하의 금형온도에서도 결정화도가 우수하여 성형품을 쉽게 사출할 수 있는 효과를 갖는다.As described in detail above, the PET resin composition of the present invention has excellent blocking property against light by adding an appropriate amount of PET-metal salt and metal acetate to PET, and has excellent crystallinity even at a mold temperature of 100 ° C or less, It has an effect that can be injected.

Claims (3)

폴리테레프탈레이트(PET) 수지를 주제로 하고 여기에 섬유강화제(보강제), 핵제, 이형제, 내열제 등을 첨가하여 조성되는 폴리에틸렌테레프탈레이트 수지 조성물에 있어서, 상기 PET 수지 100중량부에 대해 PET-염 1∼10중량부와 금속아세테이트 0.5∼2.0중량부를 더 첨가하여 조성되는 차광성 및 성형성이 우수한 폴리에틸렌테레프탈레이트 수지 조성물.A polyethylene terephthalate resin composition which is prepared by adding a fiber reinforcing agent (reinforcing agent), a nucleating agent, a releasing agent, a heat resistant agent and the like to a polyethylene terephthalate (PET) resin as a base material, And 0.5 to 2.0 parts by weight of a metal acetate is further added to the polyolefin resin composition. 제 1 항에 있어서, PET-염은 하기 식 1 또는 식 2로 표시되는 화합물에서 선택된 1종 이상임을 특징으로 하는 차광성 및 성형성이 우수한 폴리에틸렌테레프탈레이트 수지 조성물.The polyethylene terephthalate resin composition according to claim 1, wherein the PET-salt is at least one selected from compounds represented by the following formula (1) or (2). [식1][Formula 1] [식2][Formula 2] (상기 식1 및 식2에서 M은 1가 또는 2가 금속이고, n은 5∼50의 정수이다.)(Wherein M is a monovalent or divalent metal and n is an integer of 5 to 50 in the formulas 1 and 2) 제 1 항에 있어서, 금속아세테이트는 금속이 망간, 마그네슘, 칼슘중에서 선택된 1종임을 특징으로 차광성 및 성형성이 우수한 폴리에틸렌테레프탈레이트 수지 조성물.The polyethylene terephthalate resin composition according to claim 1, wherein the metal acetate is one selected from the group consisting of manganese, magnesium and calcium.
KR1019960054999A 1996-11-18 1996-11-18 Polyethylene terephthalate resin composition having excellent light blocking property and moldability KR100373173B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61152820A (en) * 1984-12-26 1986-07-11 Toray Ind Inc Polyester fiber
KR910007524A (en) * 1989-10-31 1991-05-30 쟈끄 삘라르 Use of carbothioamide 1-oxide in the manufacture of a medicament for the treatment of coronary insufficiency
KR930001997A (en) * 1991-07-12 1993-02-22 발터 비트너·프라이드만 쬐펠 Treatment of organic and inorganic nonmetallic aids for environmental preservation in junk cars or waste products

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61152820A (en) * 1984-12-26 1986-07-11 Toray Ind Inc Polyester fiber
KR910007524A (en) * 1989-10-31 1991-05-30 쟈끄 삘라르 Use of carbothioamide 1-oxide in the manufacture of a medicament for the treatment of coronary insufficiency
KR930001997A (en) * 1991-07-12 1993-02-22 발터 비트너·프라이드만 쬐펠 Treatment of organic and inorganic nonmetallic aids for environmental preservation in junk cars or waste products

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