KR100441192B1 - Method for producing copolymerized polyester for coating having excellent hardness, coating film adhesion and gloss - Google Patents

Method for producing copolymerized polyester for coating having excellent hardness, coating film adhesion and gloss Download PDF

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KR100441192B1
KR100441192B1 KR1019960080488A KR19960080488A KR100441192B1 KR 100441192 B1 KR100441192 B1 KR 100441192B1 KR 1019960080488 A KR1019960080488 A KR 1019960080488A KR 19960080488 A KR19960080488 A KR 19960080488A KR 100441192 B1 KR100441192 B1 KR 100441192B1
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acid
fatty acid
weight
mol
glycol
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KR1019960080488A
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Korean (ko)
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KR19980061119A (en
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최재웅
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에스케이케미칼주식회사
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/46—Polyesters chemically modified by esterification
    • C08G63/48—Polyesters chemically modified by esterification by unsaturated higher fatty oils or their acids; by resin acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
    • C08G63/685—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen
    • C08G63/6854—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/6858—Polycarboxylic acids and polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78—Preparation processes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids

Abstract

PURPOSE: A method for producing copolymerized polyester for coating is provided to obtain a coating film having excellent hardness, adhesion, low-temperature processability and gloss. CONSTITUTION: The method for producing copolymerized polyester for coating by polycondensation of an acid component and a glycol component utilizes, as the acid component, 5-30 mol% of a reaction product, obtained by coupling a C18 linear unsaturated fatty acid and performing hydrogenation, or its derivative capable of forming ester, and 70-95 mol% of an aromatic dicarboxylic acid or its derivative capable of forming ester. Additionally, as the glycol component, used are 3-15 mol% of trihydroxyethylisocyanurate and 85-97 mol% of a C2-C10 linear alkylene glycol, a C2-C10 branched alkylene glycol or a mixture thereof.

Description

[발명의 명칭][Name of invention]

도료용 공중합 폴리에스테르의 제조방법Manufacturing method of copolyester for paint

[발명의 상세한 설명]Detailed description of the invention

본 발명은 가공성이 향상된 공중합 폴리에스테르의 제조방법에 관한 것으로서, 특히 저온에서의 가공성이 양호하며 경도 또한 우수한 도료용 공중합 폴리에스테르의 제조방법에 관한 것이다.The present invention relates to a method for producing copolyester with improved workability, and more particularly, to a method for producing copolyester for paint having good workability at low temperatures and excellent hardness.

일반적인 방향족 폴리에스테르는 기계적 특성, 화학적 특성, 전기적 특성이 양호하여 다양한 성형용도로 사용되어 왔으나 결정속도가 빠르고 용융온도가 높으며 유기용제에 대한 용해성이 불량하여 도료용 수지나 바인더 등의 용도에 적용하기에는 많은 어려움이 있다.General aromatic polyester has been used for various molding purposes because of its good mechanical, chemical and electrical properties, but it has a high crystallization speed, high melting temperature, and poor solubility in organic solvents, making it difficult to apply to paint resins and binders. There are many difficulties.

이러한 문제를 해결하기 위하여 제안된 바 있는 선행기술의 예를 들면, 일본특공소57-23714호, 미국특허 제4281104호, 일본특공소57-94017호, 일본특공소55-50073호 및 미국특허 제4065439호가 있다. 이러한 선행기술들은 방향족 2염기산의 일부분을 지방족 2염기산으로 대체하거나, 2종이상의 알킬렌 글리콜을 사용하여 공중합 폴리에스테르를 제조하여 용융온도를 떨어트리고, 유기용제에 대한 용해성을 개선시켜 도료용 수지로 사용할 수 있도록 한 것들이다. 그러나, 이러한 선행기술의 방법으로 제조된 도료를 사용하여 코일을 코팅하고 동절기에 프레스가공을 하면 수지자체의 저온 가공성이 나빠서 표면에 크랙이 발생하여 도료로서의 기능을 잃어버리게 된다. 또한 과량의 지방족 이염기산을 사용하였을 경우에는 가공성은 향상되나 그외 경도나 내화학성이 떨어지는 문제점이 있다.Examples of the prior art that have been proposed to solve this problem include Japanese Patent Application No. 57-23714, US Patent No. 441104, Japanese Patent Application No. 57-94017, Japanese Patent Application No. 55-50073, and US Patent Application No. There is 4065439. These prior arts replace a portion of aromatic dibasic acids with aliphatic dibasic acids, or prepare copolyesters using two or more alkylene glycols to reduce the melting temperature and improve solubility in organic solvents. These are the ones that can be used as resins. However, when coating the coil using the paint prepared by the method of the prior art and pressing in the winter season, the low temperature processability of the resin itself is bad, cracks are generated on the surface and the function as the paint is lost. In addition, when an excessive aliphatic dibasic acid is used, workability is improved, but there are other problems such as poor hardness and chemical resistance.

따라서, 본 발명은 용융온도가 낮고 유기용제에 대한 용해성이 양호할 뿐만 아니라 저온 가공성 및 경도가 우수한 도료용 공중합 폴리에스테르 제조방법을 제공하는 것을 목적으로 한다.Accordingly, an object of the present invention is to provide a method for producing a copolyester for paints having a low melting temperature, good solubility in organic solvents, and excellent low temperature processability and hardness.

상기한 목적을 달성하기 위한 본 발명에 의하면, 산 성분과 글리콜 성분을 중축합하여 도료용 공중합 폴리에스테르를 제조하는 방법에 있어서;According to the present invention for achieving the above object, a method for producing a copolyester for paint by polycondensing an acid component and a glycol component;

상기 산성분으로 전체 산성분에 대하여 C18직쇄형 불포화 지방산을 커플링(coupling)한 후 수첨(hydrogenation)하여 얻은 반응생성물(이하 "수첨 지방산"이라 약함) 또는 그 에스테르 형성성 유도체 5~30몰%와 방향족 디카르복시산 또는 그 에스테르 형성성 유도체 70~95몰%를 사용하고;5 to 30 moles of a reaction product obtained by coupling C 18 linear unsaturated fatty acids with the acid component and then hydrogenating it (hereinafter, referred to as “hydrogenated fatty acid”) or its ester-forming derivatives % And 70 to 95 mol% of aromatic dicarboxylic acid or ester-forming derivative thereof;

상기 글리콜 성분으로 전체 글리콜 성분에 대하여 하기 구조식(I)의 트리하이드록시에틸이소시아누레이트(이하, "THEIC"라 약칭함) 3~15몰%와, 탄소수 2~10의 직쇄형(linear) 알킬렌 글리콜, 탄소수 2~10의 측쇄형(branched) 알킬렌글리콜 또는 이들의 혼합물 85~97몰%를 사용하는 것을 특징으로 하는 도료용 공중합 폴리에스테르의 제조방법이 제공된다.3-15 mol% of trihydroxyethyl isocyanurate of the following structural formula (I) (hereinafter abbreviated as "THEIC") with respect to the whole glycol component as said glycol component, and C2-C10 linear Provided is a method for producing a copolyester for paint, characterized by using 85 to 97 mole percent of alkylene glycol, branched alkylene glycol having 2 to 10 carbon atoms, or a mixture thereof.

이하, 본 발명을 보다 상세하게 설명하기로 한다.Hereinafter, the present invention will be described in more detail.

본 제조방법에서 사용되는 산성분 중, 수첨 지방산은 C18직쇄형 불포화 지방산을 커플링(coupling)한 후 수첨(hydrogenation)하여 분자내 2중결합을 포화시키는 것에 의해 제조되는 것으로서, 하기 구조식(II)의 수첨 이량체(C36) 지방산이 바람직하나, 수첨 이량체(C36) 지방산 60~95 중량%, 수첨 단량체(C18) 지방산 0~10 중량% 및 수첨 삼량체(C54) 지방산 이상의 올리고머 지방산 1~35 중량 %로 이루어진 혼합물을 사용할 수도 있다.Among the acid components used in the production method, the hydrogenated fatty acid is prepared by saturating intramolecular double bonds by coupling with C 18 linear unsaturated fatty acids followed by hydrogenation. Hydrogenated dimer (C 36 ) fatty acid is preferred, but hydrogenated dimer (C 36 ) fatty acid 60-95% by weight, hydrogenated monomer (C 18 ) fatty acid 0-10% by weight and hydrogenated trimer (C 54 ) fatty acid or more Mixtures of 1 to 35% by weight of oligomeric fatty acids can also be used.

상기한 단량체와 삼량체 이상의 올리고머는 수첨 이량체(dimer) 지방산의 제조중에 부산물로서 얻어지는 것으로서, 시중에서 판매되는 수첨 이량체 지방산(I)은 주로 상기한 부산물들이 상기한 혼합비율로 혼합된 상태의 것이 판매되며, 이러한 혼합물도 본 제조방법에 적용할 수 있다.The oligomers of the monomers and the trimers or more are obtained as by-products during the production of hydrogenated dimer fatty acids, and commercially available hydrogenated dimer fatty acids (I) are prepared by mixing the above-mentioned by-products in the above-mentioned mixing ratio. Are sold, and such mixtures may be applied to the present method.

한편, 본 발명에 의하면 수첨 지방산의 유도체도 사용할 수 있는데, 이러한 유도체들 중에서도 특히 바람직한 것은 수첨 이량체(C36) 지방산(II)의 디메틸에스테르이다.Meanwhile, according to the present invention, derivatives of hydrogenated fatty acids can also be used, and among these derivatives, dimethyl ester of hydrogenated dimer (C 36 ) fatty acid (II) is particularly preferred.

본 제조방법에 있어서, 수첨 지방산의 함량은 전체 산성분대비 5~30몰%가 적당한바, 5몰% 미만이면 그 첨가효과가 적으며 30몰% 초과일 경우 합성시 이량체 지방산이 분해될 가능성이 있어 폴리에스테르 수지를 원하는 만큼 분자량을 올릴 수 없게 된다. 나머지 산성분으로는 테레프탈산, 이소프탈산, 프탈산, 나프탈산과 같은 방향족 디카르복시산; 또는 디멜틸테레프탈레이트, 무수프탈산과 같은 방향족 디카르복시산의 에스테르 형성성 유도체 등을 사용할 수 있다.In the present production method, the content of hydrogenated fatty acid is 5 ~ 30 mol% compared to the total acid component is appropriate, less than 5 mol% of the addition effect is less, if more than 30 mol% dimer fatty acid can be decomposed during synthesis This prevents the molecular weight from increasing as much as the polyester resin is desired. The remaining acid components include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, phthalic acid and naphthalic acid; Or an ester-forming derivative of an aromatic dicarboxylic acid such as dimeltyl terephthalate or phthalic anhydride.

본 제조방법에 있어서, 글리콜 성분을 사용되는 THEIC(I)는 총 글리콜성분중 3~15몰%가 적당하다. 만약 THEIC(I)의 함량이 이 총 글리콜 성분중 3몰% 미만이면 그 효과가 적어 경도가 떨어지고 15몰%를 초과하면 THEIC에 포함되어 있는 3개의 관능기(-COOH)로 인한 반응으로 갑작스러운 정도상승 및 겔화의 위험성이 있다.In this production method, 3-15 mol% of the total glycol components are suitable for THEIC (I) using a glycol component. If the content of THEIC (I) is less than 3 mol% of the total glycol components, the effect is small and the hardness is lowered. If the content exceeds 15 mol%, the degree of sudden reaction due to the reaction of three functional groups (-COOH) included in THEIC There is a risk of elevation and gelation.

나머지 클리콜 성분으로는 탄소수 2~10의 직쇄형 알킬렌 글리콜, 탄소수 2~10의 측쇄형 알킬렌 글리콜 또는 이들의 혼합물이 사용된다. 특별히 제한하기 위한 것은 아니지만, 본 제조방법에 있어서, 직쇄형 알킬렌 글리콜로는 에틸렌글리콜, 1,4-부탄디올, 1,6-핵산디올, 1,8-옥탄디올, 1,10-데칸디올 등이 바람직하며, 측쇄형 알킬렌 글리콜로는 네오펜탄디올, 트리메틸펜탄디올, 다이메틸헥산디올 등이 바람직하다.As the remaining glycol component, straight alkylene glycols having 2 to 10 carbon atoms, branched alkylene glycols having 2 to 10 carbon atoms or mixtures thereof are used. Although not particularly limited, in the present production method, the linear alkylene glycol is ethylene glycol, 1,4-butanediol, 1,6-nucleic acid diol, 1,8-octanediol, 1,10-decanediol, or the like. As the side chain alkylene glycol, neopentanediol, trimethylpentanediol, dimethylhexanediol and the like are preferable.

본 발명에 따라 상기한 배합의 산성분과 글리콜성분을 사용하여 도료용 공중합 폴리에스테르를 제조할 때에는 상기한 산성분과 글리콜 성분을 통상의 방법으로 에스테르화하고, 결과의 생성물을 중축합시키게 된다. 이때, 에스테르화 촉매로서는 초산칼슘, 초산아연, 초산리듐, 테트라부톡시티탄 등을 사용할 수 있고, 중축합 반응 촉매로는 안티몬옥사이드 등을 사용할 수 있다.According to the present invention, when preparing the copolyester for coating using the acid component and glycol component of the above-mentioned formulation, the acid component and glycol component are esterified by a conventional method, and the resulting product is polycondensed. At this time, calcium acetate, zinc acetate, lithium acetate, tetrabutoxytitanium, etc. can be used as an esterification catalyst, antimony oxide etc. can be used as a polycondensation reaction catalyst.

본 제조방법에 있어서, 중축합은 공중합 폴리에스테르의 고유점도(Intrinsic Viscosity)가 0.3~0.4dl/g이 될때까지 수행하는 것이 바람직하다. 만일 공중합 폴리에스테르의 고유점도가 0.3dl/g 미만의 경우에는 점도가 떨어져 도장작업성이 불량하게 되며, 0.4dl/g를 초과하는 경우에는 경화시간이 매우 길며, 내약품성도 떨어지게 된다.In the present production method, the polycondensation is preferably performed until the intrinsic viscosity of the copolyester (Intrinsic Viscosity) is 0.3 ~ 0.4dl / g. If the intrinsic viscosity of the copolyester is less than 0.3dl / g, the viscosity is poor, the coating workability is poor, if it exceeds 0.4dl / g, the curing time is very long, and the chemical resistance is also poor.

위에 설명한 바와 같은 본 발명의 특징 및 기타의 장점은 후술되는 실시예로부터 보다 명백하게 될 것이다. 단, 본 발명은 하기 실시예로 한정되지 않는다.Features and other advantages of the present invention as described above will become more apparent from the embodiments described below. However, the present invention is not limited to the following examples.

[실시예 1]Example 1

온도조절이 가능한 칼럼과 응축기가 설치되어 있는 반응기에 산성분으로는 테레프탈산 40중량부, 이소프탈산 40중량부, 수첨 이량체 지방산(II) 20중량부를 넣고, 글리콜 성분으로는 에틸렌글리콜 50중량부, 네오펜틸글리콜 30중량부 1,6-헥산디올 10중량부 THEIC(I) 10중량부를 넣었으며, 에스테르화 촉매로서 초산아연 0.011중량부를 넣어 150~230℃에서 반응시킨 후, 메탄올을 제거하고 올리고머를 산출하였다. 얻어진 올리고머에 안티몬옥사이드 0.0008중량부와 트리메틸포스포린산 0.002 중량부를 넣고 230℃~280℃에서 진공 0.1mmHg 하에서 반응시켜 고유점도 0.3dl/g의 폴리에스테를 얻었다.40 parts by weight of terephthalic acid, 40 parts by weight of isophthalic acid, 20 parts by weight of hydrogenated dimer fatty acid (II), and 50 parts by weight of ethylene glycol as glycol components in a reactor equipped with a temperature control column and a condenser. Neopentylglycol 30 parts by weight 1,6-hexanediol 10 parts by weight 10 parts by weight of THEIC (I) was added, 0.011 parts by weight of zinc acetate as an esterification catalyst was reacted at 150 ~ 230 ℃, methanol was removed and the oligomer Calculated. 0.0008 parts by weight of antimony oxide and 0.002 parts by weight of trimethylphosphoric acid were added to the obtained oligomer, and the mixture was reacted under vacuum at 0.1 mmHg at 230 ° C to 280 ° C to obtain a polyester having an intrinsic viscosity of 0.3 dl / g.

[실시예 2]Example 2

산성분으로 디메틸테레프탈레이트 50중량부, 디케틸이소프탈레이트 40중량부 및 수첨 이량체 지방산(II)의 디메틸 에스테르 10중량부를 사용하고, 글리콜 성분으로 에틸렌글리콜 30중량부, 네오펜틸렌글리콜 35중량부, 1,6-헥산디올 10중량부 및 THEIC 5중량부를 사용한 것을 제외하고는 실시예 1과 동일한 절차를 반복하여 고유 점도 0.3dl/g의 폴리에스테르를 얻었다.50 parts by weight of dimethyl terephthalate, 40 parts by weight of diketylisophthalate and 10 parts by weight of dimethyl ester of hydrogenated dimer fatty acid (II) were used as the acid component, and 30 parts by weight of ethylene glycol and 35 parts by weight of neopentylene glycol as glycol components. The same procedure as in Example 1 was repeated except that 10 parts by weight of 1,6-hexanediol and 5 parts by weight of THEIC were used to obtain a polyester having an intrinsic viscosity of 0.3 dl / g.

[실시예 3]Example 3

산성분으로 테레프탈산 60중량부, 이소프탈산 10중량부 및 수첨 이량체 지방산(II) 30중량부를 사용하고, 글리콜 성분으로 에틸렌글리콜 30중량부, 네오펜틸렌글리콜 30중량부, 1,6-헥산디올25중량부 및 THEIC 15중량부를 사용한 것을 제외하고는 실시예 1과 동일한 절차를 반복하여 고유 점도 0.3dl/g의 폴리에스테르를 얻었다.60 parts by weight of terephthalic acid, 10 parts by weight of isophthalic acid and 30 parts by weight of hydrogenated dimer fatty acid (II) are used as acid components, and 30 parts by weight of ethylene glycol, 30 parts by weight of neopentylene glycol, and 1,6-hexanediol as glycol components. The same procedure as in Example 1 was repeated except that 25 parts by weight and 15 parts by weight of THEIC were used to obtain a polyester having an intrinsic viscosity of 0.3 dl / g.

[비교예 1]Comparative Example 1

산성분으로 테레프탈산 30중량부, 이소프탈산 40중량부 및 세바스산 30중량부를 사용하고, 글리콜 성분으로 에틸렌글리콜 30중량부, 네오펜틸렌글리콜 40중량부 및 1,6-헥산디올 30중량부를 사용한 것을 제외하고는 실시예 1과 동일한 절차를 반복하여 고유 점도 0.3dl/g의 폴리에스테르를 얻었다.30 parts by weight of terephthalic acid, 40 parts by weight of isophthalic acid and 30 parts by weight of sebacic acid, and 30 parts by weight of ethylene glycol, 40 parts by weight of neopentylene glycol and 30 parts by weight of 1,6-hexanediol as glycol components The same procedure as in Example 1 was repeated except that a polyester having an intrinsic viscosity of 0.3 dl / g was obtained.

[비교예 2]Comparative Example 2

산성분으로 테레프탈산 30중량부, 이소프탈산 40중량부, 도데칸산 30중량부를 사용하고, 글리콜 성분으로 에틸렌글리콜 40중량부, 1,10-데칸디올 20중량부 및 트리메틸펜탄디올 40중량부를 사용한 것을 제외하고는 실시예 1과 동일한 절차를 반복하여 고유 점도 0.3dl/g의 폴리에스테르를 얻었다.30 parts by weight of terephthalic acid, 40 parts by weight of isophthalic acid, 30 parts by weight of dodecanoic acid, and 40 parts by weight of ethylene glycol, 20 parts by weight of 1,10-decanediol and 40 parts by weight of trimethylpentanediol as glycol components Then, the same procedure as in Example 1 was repeated to obtain a polyester having an intrinsic viscosity of 0.3 dl / g.

상기 실시예 및 비교예에서 합성된 폴리에스테르 수지 50g을 셀로솔브아세테이트 25g, 솔베소(나프타 혼합용매) 25g에 녹여 고형분 50%로 만든 다음, 여기에 헥사메틸멜라민 15g과 파라톨루익술폰산 1g, 이산화티탄 20g을 넣어 도료를 제조하였다. 제조된 도료를 동판에 습도막 두께 50μm로 도포하고, 250℃에서 1분간 경화하여 -10℃에서 30분간 가공성(OT)을 측정하고 연필경도 및 광택을 측정하였다. 측정결과를 하기 표 1 에 제시된다.50 g of the polyester resin synthesized in Examples and Comparative Examples was dissolved in 25 g of cellosolve acetate and 25 g of Solveso (naphtha mixed solvent) to make 50% solids. 20 g of titanium was added to prepare a paint. The prepared paint was applied to a copper plate with a thickness of 50 μm of a humidity film, and cured at 250 ° C. for 1 minute to measure workability (OT) at −10 ° C. for 30 minutes, and then measured pencil hardness and gloss. The measurement results are shown in Table 1 below.

[표 1]TABLE 1

상기 표 1 로부터 알 수 있는 바와 같이 본 발명에 따르는 제조방법을 적용한 실시예 1 내지 3 의 폴리에스테르는 비교예 1 내지 2 의 폴리에스테르에 비하여 경도(도막밀착력)가 우수하고, 저온 가공성이 우수하며, 광택 또한 우수한 것으로 나타났다. 이와 같이 본 발명에 의하면 저온 가공성, 경도 및 광택이 우수한 도료용 공중합 폴리에스테르를 제공할 수 있게 된다.As can be seen from Table 1, the polyesters of Examples 1 to 3 to which the production method according to the present invention is applied are superior in hardness (coating force) to the polyesters of Comparative Examples 1 and 2, and have excellent low-temperature processability. The gloss also appeared to be excellent. Thus, according to this invention, the co-polyester for paints excellent in low temperature workability, hardness, and gloss can be provided.

Claims (4)

산 성분과 글리콜 성분을 중축합하여 도료용 공중합 폴리에스테를 제조하는 방법에 있어서,In the method of polycondensing the acid component and the glycol component to produce a copolyester for paint, 상기 산성분으로 전체 산성분에 대하여 C18직쇄형 불포화 지방산을 커플링(coupling)한 후 수첨(hydrogenation)하여 얻은 반응생성물 또는 그 에스테르 형성성 유도체 5~30몰%와 방향족 디카르복시산 또는 그 에스테르 형성성 유도체 70~95몰%를 사용하고;5-30 mol% of a reaction product obtained by coupling C18 linear unsaturated fatty acid with the acid component, followed by hydrogenation, or an ester-forming derivative thereof, and an aromatic dicarboxylic acid or ester thereof. Using 70 to 95 mole% of a sex derivative; 상기 글리콜 성분으로 전체 글리콜 성분에 대하여 하기 구조식(I)의 트리하이드록시에틸이소시아누레이트(이하, "THEIC"라 약칭함) 3~15몰%와, 탄소수 2~10의 직쇄형(linear) 알킬렌 글리콜, 탄소수 2~10의 측쇄형(branched) 알킬렌글리콜 또는 이들의 혼합물 85~97몰%를 사용하는 것을 특징으로 하는 도료용 공중합 폴리에스테르의 제조방법.3-15 mol% of trihydroxyethyl isocyanurate of the following structural formula (I) (hereinafter abbreviated as "THEIC") with respect to the whole glycol component as said glycol component, and C2-C10 linear 85 to 97 mol% of alkylene glycol, branched alkylene glycol having 2 to 10 carbon atoms, or a mixture thereof. 제 1 항에 있어서, 상기 C18직쇄형 불포화 지방산을 커플링한 후 수첨하여 얻은 반응생성물이 하기 구조식(II)의 수첨 이량체(C36) 지방산인 것을 특징으로 하는 도료용 공중합 폴리에스테르의 제조방법.The method of claim 1, wherein the reaction product obtained by coupling the C 18 linear unsaturated fatty acid and then hydrogenated is a hydrogenated dimer (C 36 ) fatty acid of the following formula (II) to prepare a coating copolymer for polyester Way. 제 1 항에 있어서, 상기 C18직쇄형 불포화 지방산을 커플링한 후 수첨하여 얻은 반응생성물이 수첨 이량체(C36) 지방산(II) 60~95 중량%, 수첨 단량체(C18) 지방산 0~10 중량% 및 수첨 삼량체(C54) 지방산 이상의 올리고머 지방산 1~35 중량%로 이루어진 혼합물인 것을 특징으로 하는 도료용 공중합 폴리에스테르의 제조방법.The reaction product according to claim 1, wherein the reaction product obtained by coupling the C 18 linear unsaturated fatty acid after hydrogenation is 60 to 95 wt% of a hydrogenated dimer (C 36 ) fatty acid (II), and a hydrogenated monomer (C 18 ) fatty acid 0 to A method for producing a copolyester for paint, characterized in that a mixture consisting of 10% by weight and 1 to 35% by weight of oligomeric fatty acids of hydrogenated trimer (C 54 ) fatty acid or more. 제 1 항에 있어서, 상기 중축합을 목적하는 공중합 폴리에스테르의 고유점도가 0.3~0.4dl/g이 될때까지 수행하는 것을 특징으로 하는 도료용 공중합 폴리에스테르의 제조방법.The method of claim 1, wherein the intrinsic viscosity of the copolyester for polycondensation is performed until 0.3 to 0.4 dl / g.
KR1019960080488A 1996-12-31 1996-12-31 Method for producing copolymerized polyester for coating having excellent hardness, coating film adhesion and gloss KR100441192B1 (en)

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KR930008085A (en) * 1991-10-29 1993-05-21 이승동 Polyester resin composition for coating
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US5418309A (en) * 1990-08-22 1995-05-23 Nippon Paint Co., Ltd. Powder coating composition

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US5418309A (en) * 1990-08-22 1995-05-23 Nippon Paint Co., Ltd. Powder coating composition
KR930008085A (en) * 1991-10-29 1993-05-21 이승동 Polyester resin composition for coating
JPH0668719A (en) * 1992-08-24 1994-03-11 Kanebo Ltd Copolymer polyester covered electric wire

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