KR100687985B1 - Manufacturing of Polyester for Binder - Google Patents

Manufacturing of Polyester for Binder Download PDF

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KR100687985B1
KR100687985B1 KR1020000041688A KR20000041688A KR100687985B1 KR 100687985 B1 KR100687985 B1 KR 100687985B1 KR 1020000041688 A KR1020000041688 A KR 1020000041688A KR 20000041688 A KR20000041688 A KR 20000041688A KR 100687985 B1 KR100687985 B1 KR 100687985B1
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polyester
phthalic anhydride
binder
acid component
acid
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KR20020008257A (en
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심춘식
남영식
박성윤
서장일
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주식회사 휴비스
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78Preparation processes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers

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  • Health & Medical Sciences (AREA)
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Abstract

본 발명은 팩 교환주기를 연장시킬 수 있으며 황변현상이 없고 접착성이 좋은 바인더용 폴리에스테르의 제조방법임.The present invention is a method of producing a polyester for a binder that can extend the pack replacement cycle, there is no yellowing phenomenon and good adhesion.

본 발명은 테레프탈산과 무수프탈산을 산성분으로 사용하고 에틸렌글리콜을 사용하여 폴리에스테르를 제조할 때 산성분중 무수프탈산의 몰비를 20 ∼ 50%으로 하며 일반식(1)의 열안정제를 0.01 ∼ 0.5중량부 투입하여 제조함을 특징으로 한다.In the present invention, when terephthalic acid and phthalic anhydride are used as an acid component and polyester is prepared using ethylene glycol, the molar ratio of phthalic anhydride in the acid component is 20 to 50%, and the heat stabilizer of the general formula (1) is 0.01 to 0.5. It is characterized in that the manufacturing by weight part.

Figure 112000015174776-pat00001
Figure 112000015174776-pat00001

(R1, R2 ; C가 3 ∼ 28인 알킬기(R 1 , R 2 ; alkyl group having 3 to 28 C)

R3 ; C가 3 ∼ 20인 에스테르 또는 아미드기 )




R 3 ; Ester or amide group having 3 to 20




Description

바인더용 폴리에스테르의 제조 방법{Manufacturing of Polyester for Binder}Manufacturing method of polyester for binders {Manufacturing of Polyester for Binder}

본 발명은 바인더용 폴리에스테르의 제조방법에 관한 것이다.The present invention relates to a method for producing a polyester for a binder.

폴리에스테르는 우수한 기계적 성질, 내열성 및 내약품성을 지니고 있어 섬유 및 엔지니어링 플라스틱 소재로 사용되고 있지만 분자 구조상 반 결정성의 특성을 지니고 있고 융점이 높아서 바인더 용도로 사용하기 위해서는 높은 온도 및 압력이 필요하며 이런 이유로 공정상에 어려움이 많다. Polyester is used in textiles and engineering plastics because of its excellent mechanical properties, heat resistance and chemical resistance, but it has semi-crystalline properties in molecular structure and its high melting point requires high temperature and pressure for use in binders. There are many difficulties.

부직포의 웨브 또는 시트를 구성하고 있는 필라멘트 또는 단섬유들을 접착시켜주기 위해 사용되는 열융착 바인더 섬유는 열 접착 가공 온도가 145 ~ 150℃이면서 일반 폴리에틸렌테레프탈레이트섬유에 근사한 유리전이온도를 가져야 하는바, 이렇게 하려면 고분자 내의 결정구조를 없애고 고분자구조를 비결정질 형태로 만들어 주어야 한다. The heat-sealed binder fiber used to bond the filaments or short fibers constituting the web or sheet of the nonwoven fabric should have a glass transition temperature close to that of general polyethylene terephthalate fiber with a heat adhesion processing temperature of 145 to 150 ° C. To do this, the crystal structure in the polymer must be removed and the polymer structure must be made amorphous.

이를 위하여 폴리에스테르 수지를 합성함에 있어서, 산 성분으로 테레프탈산과 이소프탈산을 사용하여 공중합하는 것이 대표적인 방법인데 이때 이소프탈산은 카르복실산의 30~45%의 몰분율로 첨가되며, 이렇게 합성된 폴리에스테르 수지는 비 결정질 형태의 분자구조를 가지게 되어서 최종 융점이 145 ~ 180℃의 범위를 나타내며 바인더용 폴리에스테르 섬유로 쓰여질 수 있다.To this end, in synthesizing a polyester resin, copolymerization using terephthalic acid and isophthalic acid as an acid component is typical. At this time, isophthalic acid is added at a mole fraction of 30 to 45% of the carboxylic acid. It has a molecular structure of amorphous form so that the final melting point is in the range of 145 ~ 180 ℃ can be used as polyester fibers for the binder.

그러나 이소프탈산을 사용한 바인더용 폴리에스테르 수지는 합성할 때 중합도가 2내지 3인 환상 화합물이 형성되고 이 환상 화합물의 융점은 325℃이어서 방사 시 팩 교환 주기를 짧게 하는 단점이 있으며, 또한 이소프탈산의 가격도 고가인 단점이 있다.However, polyester resins for binders using isophthalic acid have a disadvantage in that a cyclic compound having a polymerization degree of 2 to 3 is formed upon synthesis, and the melting point of the cyclic compound is 325 ° C., thus shortening the pack replacement cycle during spinning. The price is also expensive.

이러한 문제점들을 해결하기 위하여 비결정질의 분자구조를 구현할 수 있는 다른 공중합 물질로서 카르복실기의 위치가 이소프탈산의 메타 위치보다 분자 사슬을 더 구부릴 수 있는 오르소 위치의 프탈산 또는 무수프탈산을 사용하여 중합하고자 하는 시도가 있었다(영국 특허 제 788,377호, 일본특허 공개 평8-143,657호, 한국 특허 공고 제96-9776호). In order to solve these problems, attempts to polymerize using phthalic acid or phthalic anhydride in the ortho position where the position of the carboxyl group can bend the molecular chain more than the meta position of isophthalic acid as another copolymer capable of realizing an amorphous molecular structure. (UK Patent No. 788,377, Japanese Patent Application Laid-open No. Hei 8-143,657, and Korean Patent Publication No. 96-9776).

그러나 무수 프탈산의 경우 중합도가 높아짐에 따라 수지에 황변 현상이 발생하여서 실제로 적용된 사례는 아직까지 없는 실정이다. However, in the case of phthalic anhydride, as the degree of polymerization increases, yellowing occurs in the resin.

일본 특허 공개 평 8-245,778호에서는 안티모니, 코발트, 틴, 게르마늄 및 아연 등의 금속 화합물과 함께 일정량의 황산염 화합물을 첨가하여 색상을 개선하고자 하였으나 황산염은 취급이 어렵고 비교적 고가이므로 현재 상업적으로 사용하지는 못하고 있고 그 효과도 미지수이다. Japanese Patent Laid-Open No. Hei 8-245,778 tried to improve the color by adding a certain amount of sulfate compound together with metal compounds such as antimony, cobalt, tin, germanium and zinc, but since sulfate is difficult to handle and relatively expensive, it is not currently used commercially. And the effect is unknown.

또한 이러한 방법으로 합성된 폴리에스테르는 분자사슬 내에 디에틸글리콜의 함량이 높아서 유리전이온도가 상대적으로 낮아지게 되어 제품 운송 시 컨테이너 내부에서 열융착이 발생하게 되는 단점이 있었다.In addition, the polyester synthesized in this way has a high content of diethyl glycol in the molecular chain, the glass transition temperature is relatively low, there was a disadvantage that the thermal fusion occurs inside the container during product transportation.

본 발명은 산성분으로서 테레프탈산과 무수프탈산을 사용하여 비결정질의 바인더용 폴리에스테르를 제조함에 있어서, 방사시에 팩 교환주기를 연장시켜주며, 황변현상을 일으키지 않아서 색상이 개선된 바인더용 폴리에스테르의 제조방법을 제공하는데 기술적 과제를 두고 있는 것이다.In the present invention, in the preparation of amorphous binder polyester by using terephthalic acid and phthalic anhydride as the acid component, it is possible to extend the pack replacement cycle during spinning, and to produce a binder polyester with improved color by not causing yellowing. The technical challenge is to provide a method.

본 발명에서는 수지의 조성물 중 산 성분을 테레프탈산과 무수프탈산으로 하고, 디올 성분을 에틸렌글리콜로 하여서 바인더용 폴리에스테르를 제조함에 있어서, 산성분중 무수프탈산의 몰비가 20 ∼ 50%, 더욱 좋기로는 30 ∼ 40%가 되도록 하며, 테레프탈산은 에틸렌글리콜과 함께 미리 250℃에서 에스테르화 반응을 진행시켜 올리고머를 만들어 놓고, 무수프탈산은 에틸렌글리콜과 함께 70 ∼ 80℃에서 슬러리를 만든 후 에스테르화 반응조에 투입하여 240 ∼250℃에서 40 ∼ 60분간 에스테르화 반응을 진행시키며, 열안정제로는 통상의 인계화합물과 함께 아래의 일반식(1)의 화합물을 첨가하여 제조함을 특징으로 한다.





In the present invention, when the acid component is used as the terephthalic acid and the phthalic anhydride in the resin composition, and the diol component is used as the ethylene glycol to prepare a binder polyester, the molar ratio of the phthalic anhydride in the acid component is 20 to 50%, more preferably. 30 to 40%, terephthalic acid advances the esterification reaction with ethylene glycol at 250 ° C. in advance to form oligomers, and phthalic anhydride is made into a slurry at 70 to 80 ° C. with ethylene glycol and then added to an esterification reactor. The esterification reaction proceeds for 40 to 60 minutes at 240-250 ° C., and the thermal stabilizer is prepared by adding a compound of the following general formula (1) together with a common phosphorus compound.





아 래Below

Figure 112000015174776-pat00002
Figure 112000015174776-pat00002

위식에서In the common sense

R1, R2 ; 탄소수 3 ∼ 28의 알킬기 또는 R 1 , R 2 ; An alkyl group having 3 to 28 carbon atoms or

탄소수 1 ∼ 20인 히드록시 알킬기              C1-C20 hydroxy alkyl group

R3 ; 탄소수 3 ∼ 20인 에스테르 또는 아미드기R 3 ; Ester or amide group having 3 to 20 carbon atoms

본 발명처럼 산 성분을 테레프탈산과 무수프탈산으로 하여 수지를 제조할 경우 역시 저분자량의 고리 화합물은 생성되지만 이의 융점은 198℃정도로 낮기 때문에 방사시에 팩 수명에 거의 영향을 미치지 않게 되어서 생산성 향상을 도모할 수 있다.When the resin is prepared by using the acid component as terephthalic acid and phthalic anhydride as in the present invention, a low molecular weight cyclic compound is also produced, but since its melting point is about 198 ° C., it hardly affects the pack life during spinning, thereby improving productivity. can do.

본 발명에서 산 성분 중 무수프탈산의 함량이 본 발명의 조건을 만족하게 되면 수지가 비결정질의 특성을 갖게 되고 낮은 연화점을 가지게 된다. In the present invention, when the content of phthalic anhydride in the acid component satisfies the conditions of the present invention, the resin has an amorphous characteristic and has a low softening point.

수지의 산 성분 중 무수프탈산의 함량이 50몰분율을 초과할 경우는 수지의 중합도가 낮아 섬유 형성능이 떨어져 방사가 불가능하며, 20몰분율 미만인 경우는 섬유형성능은 우수하지만 수지의 결정성이 너무 커서 바인더 섬유용으로 적용할 수가 없다. If the content of phthalic anhydride in the acid component of the resin exceeds 50 mole fraction, the polymerization degree of the resin is low and the fiber formation ability is poor, and if it is less than 20 mole fraction, the fiber formation ability is excellent but the crystallinity of the resin is so large that the binder fiber Not applicable for                     

촉매로는 안티모니, 코발트, 틴, 아연, 게르마늄 등의 금속화합물을 한가지 또는 두가지 이상을 사용하여 수지내의 산 성분에 대해 0.1 ~ 10 × 10-4 몰비로 투입하며, 또한 열안정제로서 일반식(1)의 구조식을 가지는 화합물과 인계 열안정제를 투입하여 색가가 개선된 바인더용 폴리에스테르 수지를 제조할 수 있다. As a catalyst, one or more metal compounds such as antimony, cobalt, tin, zinc, germanium, etc. are used at a molar ratio of 0.1 to 10 × 10 -4 to the acid component in the resin, and as a thermal stabilizer, By adding a compound having a structural formula of 1) and a phosphorus-based heat stabilizer, a polyester resin for a binder having improved color value can be prepared.

이 때 일반식(1)의 화합물의 첨가량은 폴리에스테르 100부에 대하여 0.01~0.5 중량부이다.At this time, the addition amount of the compound of General formula (1) is 0.01-0.5 weight part with respect to 100 parts of polyester.

첨가량이 0.01중량부 미만이면 색상 개선효과를 기대할 수 없으며 0.5중량부를 초과하더라도 더 이상의 색상개선은 되지 않는다. If the amount is less than 0.01 parts by weight can not be expected to improve the color, even if it exceeds 0.5 parts by weight no further color improvement.

인계 열안정제로는 트리에틸포스페이트, 트리메틸포스페이트, 트리페닐포스파이트 또는 인산 등이 쓰여질 수 있다. As the phosphorus thermal stabilizer, triethyl phosphate, trimethyl phosphate, triphenyl phosphite or phosphoric acid may be used.

본 발명처럼 무수프탈산을 투입시키면 무수프탈산의 열접촉 시간이 단축되어서 색가를 향상시킬 수 있는 것이다.When phthalic anhydride is added as in the present invention, the thermal contact time of phthalic anhydride can be shortened, thereby improving color value.

중축합반응시의 반응온도는 250 ~ 280℃로 하는 것이 좋다.In the polycondensation reaction, the reaction temperature is preferably 250 to 280 ° C.

280℃를 초과하면 황변이 일어나 색상이 좋지 않으며, 250℃미만이면 반응성이 떨어져 중합도를 올리기 어렵다. If it exceeds 280 ℃ yellowing occurs and the color is not good, if it is less than 250 ℃ it is difficult to increase the degree of polymerization due to the reactivity.

더욱 바람직한 반응온도는 255 ~ 275℃이다. More preferable reaction temperature is 255-275 degreeC.

실시예 및 비교예에 나타난 평가 항목은 아래와 같이 측정하였다. Evaluation items shown in Examples and Comparative Examples were measured as follows.

1. 고유점도 (Intrinsic Viscosity : IV)1.Intrinsic Viscosity (IV)

제조된 중합체를 페놀과 사염화에탄이 50대 50의 부피비로 혼합된 용매에 0.5dl/g의 농도로 용해하고 이 용액을 35℃의 항온조에서 우벨로드 점도계를 이용 하여 측정하였다. The prepared polymer was dissolved in a solvent in which phenol and ethane tetrachloride were mixed at a volume ratio of 50 to 50 at a concentration of 0.5 dl / g, and the solution was measured using a Ubelrod viscometer in a 35 ° C thermostat.

2. 분자사슬내 디에틸글리콜 함량(DEG%)2. Diethylglycol content in molecular chain (DEG%)

제조된 중합체를 중수소로 치환된 클로로포름 용매에 용해시키고 이를 핵자기 공명 장치로 스케닝하여 나온 피크 중 디에틸글리콜의 피크를 가려내어 함량을 분석하였다.The prepared polymer was dissolved in deuterium-substituted chloroform solvent, and the peak of diethylglycol was determined by analyzing the content by screening it with a nuclear magnetic resonance apparatus.

3. 유리전이온도 (Tg)3. Glass Transition Temperature (Tg)

제조된 중합체를 시차 열분석기를 사용하여 20℃/min의 속도로 가열하면서 유리전이온도를 측정하였다.The glass transition temperature was measured while the prepared polymer was heated at a rate of 20 ° C./min using a differential thermal analyzer.

실시예 1Example 1

70~80℃의 온도에서 무수프탈산과 에틸렌글리콜을 몰비로 1대 2.5가 되도록하여 슬러리를 조제하고, 환류가 가능하도록 설계된 응축기와 교반장치가 설치된 스테인레스스틸 반응기에 미리 제조되어 있는 테레프탈산과 에틸렌글리콜의 올리고머를 투입하여 에스테르화 반응온도로 상승시켜 놓은 후 제조된 무수프탈산 슬러리를 투입한다. Phthalic anhydride and ethylene glycol in a molar ratio of 1 to 2.5 at a temperature of 70 ~ 80 ℃ to prepare a slurry, and the pre-prepared terephthalic acid and ethylene glycol in a stainless steel reactor equipped with a condenser and agitator designed to enable reflux After the oligomer is added to raise the esterification temperature, the prepared phthalic anhydride slurry is added.

이 후 반응기를 가열 교반하여 온도를 240℃까지 상승시키고 에스테르 교환반응을 시킨다.Thereafter, the reactor is heated and stirred to raise the temperature to 240 ° C. and undergoes a transesterification reaction.

에스테르 교환반응이 완료되면 중축합 촉매 및 일반식(1)의 열안정제 등을 표 1과 같이 첨가하고 온도를 서서히 올려서 최종온도가 270℃가 되게 하며, 서서히 감압하여 최종감압도가 0.5토르 이하가 되도록하여 반응을 진행시키며 교반 장치의 토르크메타의 값에 따라 반응을 정지시켜 일정한 점도를 지니는 공중합 폴리 에스테르 폴리머를 얻는다.When the transesterification reaction is completed, the polycondensation catalyst and the thermal stabilizer of formula (1) are added as shown in Table 1, and the temperature is gradually raised to a final temperature of 270 ° C. The reaction is allowed to proceed, and the reaction is stopped according to the torque meter value of the stirring apparatus to obtain a copolyester polymer having a constant viscosity.

실시예 2Example 2

실시예 1과 같으며 다만 산성분의 몰비가 무수프탈산/테레프탈산 = 30/70 이고, 일반식(1)의 열안정제를 표1과 같은 함량으로 투입하였다.As in Example 1, but the molar ratio of the acid component is phthalic anhydride / terephthalic acid = 30/70, and the thermal stabilizer of the general formula (1) was added to the content shown in Table 1.

실시예 3Example 3

실시예 1과 같으며 다만 산성분의 몰비가 무수프탈산/테레프탈산 = 40/60이고, 일반식(1)의 열안정제를 표1과 같은 함량으로 투입하였다.As in Example 1, but the molar ratio of the acid component is phthalic anhydride / terephthalic acid = 40/60, and the thermal stabilizer of the general formula (1) was added to the content shown in Table 1.

실시예 4Example 4

실시예 1과 같으며 다만 산성분의 몰비가 무수프탈산/테레프탈산 = Same as Example 1, except that the molar ratio of the acid component is phthalic anhydride / terephthalic acid =

30/70 이고, 일반식(1)의 열안정제를 표1과 같은 함량으로 투입하였다.30/70, and the thermal stabilizer of the general formula (1) was added to the content as shown in Table 1.

실시예 5Example 5

실시예 1과 같으며 다만 산성분의 몰비가 무수프탈산/테레프탈산 = 30/70 이고, 일반식(1)의 열안정제를 표1과 같은 함량으로 투입하였다.As in Example 1, but the molar ratio of the acid component is phthalic anhydride / terephthalic acid = 30/70, and the thermal stabilizer of the general formula (1) was added to the content shown in Table 1.

실시예 6Example 6

실시예 1과 같으며 다만 산성분의 몰비가 무수프탈산/테레프탈산 = 30/70 이고, 일반식(1)의 열안정제를 표1과 같은 함량으로 투입하였다.As in Example 1, but the molar ratio of the acid component is phthalic anhydride / terephthalic acid = 30/70, and the thermal stabilizer of the general formula (1) was added to the content shown in Table 1.

비교예 1Comparative Example 1

실시예 1과 같으며 다만 산성분의 몰비가 무수프탈산/테레프탈산 = 10/90 이고, 일반식(1)의 열안정제를 표1과 같은 함량으로 투입하였다.
As in Example 1, except that the molar ratio of the acid component is phthalic anhydride / terephthalic acid = 10/90, and the thermal stabilizer of the general formula (1) was added in the amounts shown in Table 1.

비교예 2Comparative Example 2

실시예 1과 같으며 다만 산성분의 몰비가 무수프탈산/테레프탈산 = 90/10 이고, 일반식(1)의 열안정제를 표1과 같은 함량으로 투입하였다.As in Example 1, except that the molar ratio of the acid component is phthalic anhydride / terephthalic acid = 90/10, and the thermal stabilizer of the general formula (1) was added in the amount shown in Table 1.

비교예 3Comparative Example 3

실시예 1과 같으며 다만 산성분의 몰비가 무수프탈산/테레프탈산 = 30/70 이고, 일반식(1)의 열안정제는 투입하지 않았다.As in Example 1, except that the molar ratio of the acid component was phthalic anhydride / terephthalic acid = 30/70, and the thermal stabilizer of the general formula (1) was not added.

비교예 4Comparative Example 4

실시예 1과 같으며 다만 산성분의 몰비가 무수프탈산/테레프탈산 = 30/70 이고, 일반식(1)의 열안정제가 표1과 같은 함량으로 투입되고, 무수프탈산 슬러리를 따로 만들지 않고 테레프탈산과 함께 에틸렌글리콜과 에스테르화를 시켰다.As in Example 1, except that the molar ratio of the acid component is phthalic anhydride / terephthalic acid = 30/70, the thermal stabilizer of the general formula (1) is added to the content as shown in Table 1, with terephthalic acid without making a slurry of phthalic anhydride separately Ethylene glycol and esterification were carried out.

비교예 5Comparative Example 5

실시예 1과 같으며 다만 산성분의 몰비가 무수프탈산/테레프탈산 = 60/40 이고, 일반식(1)의 열안정제를 표1과 같은 함량으로 투입하였다.As in Example 1, except that the molar ratio of the acid component is phthalic anhydride / terephthalic acid = 60/40, the thermal stabilizer of the general formula (1) was added to the content shown in Table 1.

< 표 1 ><Table 1>

PAn/TPA몰비PAn / TPA molar ratio 열안정제 (중량부)Thermal Stabilizer (parts by weight) IVIV DEG%DEG% b가b TgTg 비고Remarks 실시예 1Example 1 30 / 7030/70 0.010.01 0.600.60 4.34.3 3.73.7 6161 실시예 2Example 2 20 / 8020/80 0.020.02 0.670.67 4.54.5 2.72.7 6868 실시예 3Example 3 40 / 6040/60 0.10.1 0.570.57 4.84.8 4.34.3 5757 실시예 4Example 4 35 / 6535/65 0.30.3 0.530.53 5.15.1 3.23.2 5555 실시예 5Example 5 30 / 7030/70 0.50.5 0.420.42 4.34.3 2.32.3 6262 실시예 6Example 6 30 / 7030/70 0.30.3 0.660.66 5.25.2 3.83.8 5656 비교예 1Comparative Example 1 10 / 9010/90 0.010.01 0.620.62 5.25.2 1.51.5 6868 점착성 불량Poor adhesion 비교예 2Comparative Example 2 90 / 1090/10 0.010.01 0.320.32 7.47.4 9.89.8 4545 비교예 3Comparative Example 3 30 / 7030/70 00 0.610.61 9.19.1 10.410.4 5353 비교예 4Comparative Example 4 30 / 7030/70 0.10.1 0.600.60 8.68.6 8.98.9 4949 비교예 5Comparative Example 5 60 / 4060/40 0.10.1 0.350.35 8.48.4 10.110.1 4747

PAn : 무수프탈산, TPA : 테레프탈산 PAn: phthalic anhydride, TPA: terephthalic acid                     

열안정제 : 일반식(1)의 구조식을 가지는 열안정제. Thermal stabilizer: A thermal stabilizer having the structural formula (1).

함량은 수지 100부에 대한 중량부.           The content is parts by weight based on 100 parts of resin.

본 발명은 중합과정에서 생성되는 부산물인 저분자량 고리화합물의 융점이 198℃ 정도로 낮기 때문에 용융방사시에 팩 교환주기를 연장시킬 수 있으며, 그 결과 생산성을 향상시킬 수 있다.In the present invention, since the melting point of the low molecular weight cyclic compound, which is a by-product produced during the polymerization, is about 198 ° C., the pack exchange cycle can be extended during melt spinning, and as a result, productivity can be improved.

또 본 발명으로 제조된 바인더용 폴리에스테르는 분자사슬내의 디에틸글리콜의 함량이 낮아서 황변현상도 개선되며, 유리전이온도가 일반 폴리에틸렌 테레프탈레이트와 같은 수준이므로 접착성이 양호하다.










In addition, the binder polyester prepared according to the present invention has a low content of diethyl glycol in the molecular chain, thereby improving yellowing and having good adhesion since the glass transition temperature is the same as that of general polyethylene terephthalate.










Claims (2)

산 성분을 테레프탈산과 무수프탈산으로 하고 디올 성분을 에틸렌글리콜로 하여 바인더용 폴리에스테르를 제조함에 있어서, 산 성분 중 무수프탈산의 몰비를 20∼50%가 되도록 하고, 테레프탈산과 글리콜 성분을 통상의 에스테르화 반응을 진행시켜 올리고머를 만들어 놓고, 무수프탈산의 열접촉 시간을 단축시키기 위해 무수프탈산은 글리콜과 함께 70∼80℃의 온도에서 슬러리를 만든 후 에스테르화 반응조에 투입하여 240∼250℃의 반응온도에서 에스테르화 반응을 진행한 후 250∼280℃의 반응 온도에서 폴리에스테르를 중축합시키며, 일반식(1)의 열 안정제를 투입하여 제조함을 특징으로 하는 바인더용 폴리에스테르의 제조 방법.In preparing a polyester for binder, wherein the acid component is terephthalic acid and phthalic anhydride and the diol component is ethylene glycol, the molar ratio of phthalic anhydride in the acid component is 20 to 50%, and the terephthalic acid and glycol component are usually esterified. In order to advance the reaction to form an oligomer, and to shorten the thermal contact time of phthalic anhydride, phthalic anhydride is made with a glycol at a temperature of 70 to 80 ° C. and then added to a esterification reactor at a reaction temperature of 240 to 250 ° C. Polycondensation of polyester at reaction temperature of 250-280 degreeC after an esterification reaction is carried out, The manufacturing method of the polyester for binder characterized by manufacturing by adding the heat stabilizer of General formula (1).
Figure 112006061616369-pat00003
Figure 112006061616369-pat00003
R1, R2 ; C가 3 ∼ 28인 알킬기 R 1 , R 2 ; C 3-28 alkyl group R3 ; C가 3 ∼ 20인 에스테르 또는 아미드기R 3 ; Ester or amide group having 3 to 20 C
제 1 항에 있어서, 일반식(1)의 열안정제를 폴리에스테르 100부에 대하여 0.01~0.5 중량부를 첨가하여 제조함을 특징으로 하는 바인더용 폴리에스테르의 제조방법.The method for producing a polyester for binder according to claim 1, wherein the thermal stabilizer of the general formula (1) is added by adding 0.01 to 0.5 parts by weight based on 100 parts of polyester.
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JPS55116818A (en) * 1979-03-01 1980-09-08 Unitika Ltd High-modulus polyester fiber
KR900003338A (en) * 1988-08-26 1990-03-26 오노 알버어스 Method of catalytic cracking hydrocarbon feedstock
KR900003338B1 (en) * 1987-12-15 1990-05-14 주식회사 코오롱 The method of high-shrinkable polyester fiber
JPH08143657A (en) * 1994-11-17 1996-06-04 Nippon Ester Co Ltd Copolyester and its production
KR100302108B1 (en) * 1999-07-28 2001-09-22 김윤 Hot melt adhesives for polyester fiber
KR100422479B1 (en) * 1996-06-12 2004-05-31 주식회사 휴비스 Production of split type conjugate fiber improved in spinnability and drawability

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55116818A (en) * 1979-03-01 1980-09-08 Unitika Ltd High-modulus polyester fiber
KR900003338B1 (en) * 1987-12-15 1990-05-14 주식회사 코오롱 The method of high-shrinkable polyester fiber
KR900003338A (en) * 1988-08-26 1990-03-26 오노 알버어스 Method of catalytic cracking hydrocarbon feedstock
JPH08143657A (en) * 1994-11-17 1996-06-04 Nippon Ester Co Ltd Copolyester and its production
KR100422479B1 (en) * 1996-06-12 2004-05-31 주식회사 휴비스 Production of split type conjugate fiber improved in spinnability and drawability
KR100302108B1 (en) * 1999-07-28 2001-09-22 김윤 Hot melt adhesives for polyester fiber

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