KR101880989B1 - Low specific gravity thermosetting resin composition improving coating quality - Google Patents
Low specific gravity thermosetting resin composition improving coating quality Download PDFInfo
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Abstract
Description
본 발명은 도장 품질을 향상시킨 저비중 열경화성수지 조성물에 관한 것으로, 특히 전기자동차에서 경량화는 연비와 직결되기 때문에 연비 향상을 위해 경량화에 일조하도록 루프, 후프 등의 자동차 부품을 저비중의 수지조성물을 이용하여 성형하되 도장 후 샌딩처리시에도 외관품질이 떨어지지 않도록 개선된 저비중 열경화성수지 조성물에 관한 것이다.The present invention relates to a low specific gravity thermosetting resin composition which improves the quality of painting. Particularly, in lightening the weight of an electric vehicle, an automobile part such as a loop or a hoop is used as a low specific gravity resin composition The present invention also relates to a low specific gravity thermosetting resin composition which is improved in appearance quality even when subjected to sanding treatment after painting.
전세계적으로 전기자동차의 수요가 증가하고 있고, 특히 중국은 국가적인 차원의 전폭적 지원에 힘입어 비약적으로 성장하고 있으며, 가장 큰 시장이다.Demand for electric vehicles is increasing worldwide, and China is growing rapidly, supported by full support from the national level, and is the largest market.
이러한 전기자동차 시장의 성장에 따라 소비자의 요구사항도 함께 증대하여 각국의 완성차 업체에서도 이와 같은 소비자의 요구사항을 반영하기 위해 노력하고 있는데 주된 요구사항중 하나로 연비 개선을 들 수 있다.As the electric vehicle market grows, the demands of consumers increase as well, and the automakers in each country are striving to reflect these consumer requirements. One of the main requirements is fuel efficiency improvement.
특히, 전기자동차(HEV, PHEV, EV, 수소연료전지차 등)의 경우 1회 충전으로 주행가능한 거리를 높이기 위해 차량의 중량절감, 배터리 용량증대 등 많은 부분에 있어 연구 및 투자를 집중하고 있다.In particular, in the case of electric vehicles (HEV, PHEV, EV, hydrogen fuel cell vehicle, etc.), research and investment are concentrated on many aspects such as weight saving of the vehicle and increase of the battery capacity.
이와 같이 전기자동차의 중량 절감을 위해 부품단위별로도 경량화소재를 적용하려는 시도가 활발하게 이루어지고 있다.In order to reduce the weight of electric vehicles, attempts have been actively made to apply lightweight materials to individual parts.
그 일환으로 루프나 후프 등의 부품에도 경량화가 요구되고 있으며, 치수안정성과 내구성, 내열성이 우수한 열경화성수지 조성물로 특히 SMC(유리섬유가 함유된 불포화폴리에스테르)가 활용되고 있다.Particularly, parts such as loops and hoops are required to be lightweight, and thermosetting resin compositions excellent in dimensional stability, durability, and heat resistance, in particular, SMC (unsaturated polyester containing glass fiber) are utilized.
이렇게, 비중을 낮추기 위해 이러한 열경화성수지 조성물에 필수적으로 포함되어야 할 필러를 최대한 저비중 필러로 사용하고 있음에도 불구하고 비중이 1.55 정도 유지되고 있어 연비 개선에 대한 지속적인 요구인 비중 1.2 까지 낮추는데는 한계에 부딪혀 있다.In order to reduce the specific gravity, although the filler that is to be essentially contained in the thermosetting resin composition is used as a low specific gravity filler, the specific gravity is maintained at about 1.55, which limits the requirement to lower the specific gravity to 1.2 have.
이것 외에도, 종래 저비중 필러들은 비중을 낮추면서 물성은 유지되어야 하기 때문에 주로 글래스 버블, 즉 속이 빈 글래브 볼 형태를 취하고 있는데, 루프나 후프 등은 필요불가결하게 외관도장이 수행되어야 하나 이들은 체결을 위해 안쪽면에 보스와 리브 구조를 갖추고 있어 보스나 리브가 형성된 반대쪽 외관면은 고르지 않아 이를 고르게 하기 위해 도장 전에 샌딩처리해야 한다.In addition to this, conventionally low specific gravity fillers are required to maintain the physical properties while lowering the specific gravity. Therefore, glass bubbles, that is, hollow glass balls are used, and loops and hoops are required to be exteriorly coated. The boss and rib structure are provided on the inner surface of the gun so that the outer surface of the boss or rib formed on the opposite side is uneven, so it must be sanded before painting to make it even.
그런데, 샌딩처리시 미세한 중공의 유리구 형태, 즉 글래스 버블이 깨지거나 터져 도장 후 도장면에서 기포를 생성시켜 도장 품질을 급격히 떨어뜨리는 현상을 야기시키는 문제도 심각한 상태이다.However, there is a serious problem that when the sanding process is carried out, a fine hollow glass spherical shape, that is, a glass bubble breaks or bursts, and bubbles are generated on the coated surface after coating, causing a sudden drop in paint quality.
때문에, 이러한 문제를 해소하면서 비중도 낮출 수 있는 열경화성수지 조성물의 개발이 시급한 실정이지만, 아직까지 개선이 이루어지지 않고 있다.Therefore, development of a thermosetting resin composition capable of lowering the specific gravity while solving such problems is urgent, but the improvement has not yet been made.
본 발명은 상술한 바와 같은 종래 기술상의 제반 문제점들을 감안하여 이를 해결하고자 창출된 것으로, 특히 전기자동차에서 경량화는 연비와 직결되기 때문에 연비 향상을 위해 경량화에 일조하도록 루프, 후프 등의 자동차 부품을 저비중의 수지조성물을 이용하여 성형하되 도장 후 샌딩처리시에도 외관품질이 떨어지지 않도록 개선된 저비중 열경화성수지 조성물을 제공함에 그 주된 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art and has been made in order to solve the above problems. In particular, since weight reduction in an electric vehicle is directly linked to fuel consumption, The present invention provides a low specific gravity thermosetting resin composition which is formed by using a resin composition having a specific gravity and is not deteriorated in appearance quality even after sanding treatment after painting.
본 발명은 상기한 목적을 달성하기 위한 수단으로, 루프 또는 후드를 포함한 자동차용 부품 제조를 위한 도장 품질을 향상시킨 저비중 열경화성수지 조성물로서,
불포화 폴리에스테르 수지 25-30중량%와, 충진제 25-30중량%와, 저비중 필러 4-7중량%와, 첨가제 2-6중량%와, 경화제 0.3-0.6중량%와, 증점제 0.7-1.2중량% 및 나머지 유리섬유로 이루어지되,
상기 충진제는 0.1-0.3㎛의 입도를 갖는 방해석 분말이고;
상기 저비중 필러는 0.22-0.45의 비중과 0.1-0.3㎛의 입도를 갖는 속이 비지 않는 중실체(中實體)인 목분 또는 화산재이며;
상기 첨가제는 난연제로서 수산화알루미늄:인/질소 복합화합물이 1:2의 중량비로 혼합된 것을 사용하고;
상기 경화제는 TBPB(T-Butyl-peroxy Benzoate)이며;
상기 증점제는 점도를 조절하기 위해 첨가되는 KYOWMAG(Magnesium Oxide)인 것을 특징으로 하는 도장 품질을 향상시킨 저비중 열경화성수지 조성물을 제공한다.The present invention provides a low specific gravity thermosetting resin composition having improved coating quality for manufacturing automotive parts including a loop or a hood,
25-30% by weight of an unsaturated polyester resin, 25-30% by weight of a filler, 4-7% by weight of a low specific gravity filler, 2-6% by weight of an additive, 0.3-0.6% by weight of a curing agent, % And the remaining glass fibers,
The filler is calcite powder having a particle size of 0.1-0.3 mu m;
The low specific gravity filler is wood flour or volcanic ash, which is a hollow solid having a specific gravity of 0.22-0.45 and a grain size of 0.1-0.3 mu m;
Wherein the additive is a flame retardant mixed with aluminum hydroxide: phosphorus / nitrogen complex compound at a weight ratio of 1: 2;
The curing agent is TBPB (T-Butyl-peroxy Benzoate);
Wherein the thickening agent is KYOWMAG (Magnesium Oxide) added to control the viscosity. The present invention also provides a low specific gravity thermosetting resin composition having improved coating quality.
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본 발명에 따르면, 루프, 후프 등의 자동차 부품, 특히 연비 개선과 직결되는 전기자동차용 부품을 저비중의 수지조성물을 통해 성형하되 도장 후 샌딩처리시에도 외관품질이 떨어지지 않도록 하는 효과를 얻을 수 있다.According to the present invention, an automobile part such as a loop or a hoop, particularly an electric automobile part directly connected with improvement in fuel economy, is molded through a resin composition having a low specific gravity, and the effect of preventing the appearance quality from being deteriorated even after sanding after painting can be obtained .
이하에서는, 본 발명에 따른 바람직한 실시예를 보다 상세하게 설명하기로 한다.Hereinafter, preferred embodiments according to the present invention will be described in detail.
본 발명 설명에 앞서, 이하의 특정한 구조 내지 기능적 설명들은 단지 본 발명의 개념에 따른 실시예를 설명하기 위한 목적으로 예시된 것으로, 본 발명의 개념에 따른 실시예들은 다양한 형태로 실시될 수 있으며, 본 명세서에 설명된 실시예들에 한정되는 것으로 해석되어서는 아니된다.Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.
또한, 본 발명의 개념에 따른 실시예는 다양한 변경을 가할 수 있고 여러 가지 형태를 가질 수 있다.In addition, the embodiment according to the concept of the present invention can make various changes and have various forms.
본 발명에 따른 도장 품질을 향상시킨 저비중 열경화성수지 조성물은 불포화 폴리에스테르 수지 25-30중량%와, 충진제 25-30중량%와, 저비중 필러 4-7중량%와, 첨가제 2-6중량%와, 경화제 0.3-0.6중량%와, 증점제 0.7-1.2중량% 및 나머지 유리섬유로 이루어진다.The low specific gravity thermosetting resin composition according to the present invention comprises 25-30% by weight of an unsaturated polyester resin, 25-30% by weight of a filler, 4-7% by weight of a low specific gravity filler, 2-6% 0.3 to 0.6% by weight of a curing agent, 0.7 to 1.2% by weight of a thickener, and the balance glass fibers.
이때, 상기 불포화 폴리에스테르 수지는 열경화성수지로서, 액상수지에 촉매, 촉진제만 가해도 용도에 따라 상온 성형이 가능할 정도로 성형성이 우수하고 무엇보다도 비중이 작아 경량화가 가능한 장점이 있으며 특히, 인장강도, 충격강도가 동일 중량 대비 금속재료에 버금갈 정도로 우수한 장점이 있고, 나아가 내열성이 우수하다.At this time, the unsaturated polyester resin is a thermosetting resin. However, even if only a catalyst and an accelerator are added to the liquid resin, the unsaturated polyester resin is excellent in moldability enough to allow room temperature molding, The impact strength is as good as that of the metal material with respect to the same weight, and furthermore, the heat resistance is excellent.
또한, 상기 충진제는 일종의 무기필러로서, 기계적 강도를 보강하고, 내열성을 강화시키기 위해 첨가되며, 본 발명에서는 방해석이 사용된다.The filler is added as an inorganic filler to reinforce mechanical strength and heat resistance, and calcite is used in the present invention.
다만, 본 발명에서는 0.1-0.3㎛의 입도를 갖는 분말 형태로 첨가되며, 특히 30중량%를 초과할 경우에는 성형성을 떨어뜨리고, 25중량% 미만으로 첨가되면 기계적 강도 및 내열성 보강 기능이 저하되기 때문에 상기 범위로 한정하여 첨가되어야 한다.However, in the present invention, it is added in the form of powder having a particle size of 0.1-0.3 μm. Particularly, if it is more than 30% by weight, moldability is lowered. If it is less than 25% by weight, mechanical strength and heat resistance Therefore, it should be added only in the above range.
아울러, 상기 저비중 필러는 기존의 속이 빈 글라스볼과 달리 본 발명에서는 목분 또는 화산재가 사용된다.In addition, the low specific gravity filler uses wood powder or ash in the present invention, unlike the conventional hollow glass balls.
이 경우, 목분 또는 화산재로 곱게 갈아 0.1-0.3㎛의 입도를 갖도록 해야 하며, 이들은 비중이 0.22-0.45로서 저비중에 속하기 때문에 루프 판넬이나 혹은 외판이나 후드 등의 성형시 비중을 줄이는데 기여하게 된다.In this case, it should be finely ground with wood powder or ash and have a particle size of 0.1-0.3 μm. Since they have a specific gravity of 0.22-0.45 and belong to a low specific gravity, they contribute to reduce specific gravity when forming roof panel or outer panel or hood .
특히, 이들은 속이 빈 글라스볼 타입이 아니고 비중도 기존 글라스볼 타입 보다 낮기 때문에 도장전 외관을 샌딩처리하더라도 터지거나 깨지는 부분이 없어 매끄럽고 균일한 샌딩처리면을 제공할 수 있어 외관 도장 불량의 문제를 발생시키지 않고, 오히려 더 우수한 도장 표면을 제공하며, 비중은 더 낮출 수 있어 효과적이다.Particularly, since they are not hollow glass ball type and specific gravity is lower than conventional glass ball type, even if the outer surface is pre-painted, there is no blowing or cracking part, and smooth and uniform sanding treatment surface can be provided. But rather provides a better coating surface, and is able to lower specific gravity and is effective.
그리고, 상기 첨가제는 난연제로서 수산화알루미늄(ATH), 인/질소 복합화합물, DBDPE(DecaBromodiphenyl Ethane), 삼산화안티몬 중에서 선택된 어느 하나를 사용함이 바람직하다.Preferably, the additive is selected from the group consisting of aluminum hydroxide (ATH), phosphorus / nitrogen compound, DBDPE (deca bromodiphenyl ethane), and antimony trioxide.
이때, 난연제의 혼합예는 수산화알루미늄:인/질소 복합화합물이 1:2의 중량비로 혼합된 것을 사용함이 바람직하다.At this time, it is preferable to use a mixture of the aluminum hydroxide: phosphorus / nitrogen composite compound in a weight ratio of 1: 2.
아울러, 수산화알루미늄은 알루미늄의 수산화물로 양쪽성 수산화물이며, 유리섬유 속에 채우면 방수성이 커지고 저발연성을 갖기 때문에 본 발명에서는 필수적으로 유리섬유를 주요 조성중 하나로 포함해야 하며, 가공기계의 부식성이 작고 전기절연성이 우수하여 대표적인 난연제로 활용되고 있다.In addition, aluminum hydroxide is a hydroxide of aluminum and is an amphoteric hydroxide. When filled in glass fiber, waterproofing property is high and low ductility is ensured. Therefore, in the present invention, glass fiber must be included as one of main constituents. And is used as a typical flame retardant.
그리고, 인/질소 복합화합물은 연소시 열분해되어 H3PO4를 생성하여 탈수탄화 작용에 의해 고체 숯을 생성하고, 이 숯이 산소와 열의 확산을 차단하며, 화염전단으로부터 또는 화염전단에 연소성 분해생성물의 확산을 차단하게 된다. 이때 생긴 H3PO4는 다시 열분해되어 PO라디칼을 생성하며 연소중 연쇄반응을 일으키는 H라디칼 또는 OH라디칼을 안정화시키게 된다. 따라서, 이 복합화합물은 저유해성, 저발열성, 저부식성, 내열성 측면에서 바람직하다.The phosphorus / nitrogen composite compound is pyrolyzed at the time of combustion to generate H 3 PO 4 to generate solid char by dehydration carbonization, and this charcoal blocks the diffusion of oxygen and heat, and the combustion decomposition is carried out from the flame front or flame front Thereby preventing diffusion of the product. The resulting H 3 PO 4 is again pyrolyzed to form PO radicals and stabilize H radicals or OH radicals that cause chain reactions during combustion. Therefore, this complex compound is preferable from the viewpoints of low harmfulness, low pyrogenicity, low corrosion resistance and heat resistance.
또한, DBDPE는 대표적인 브롬계 난연제로서 열경화성수지 및 섬유(Fiber)와의 결합을 통한 내열성, 저발열성을 강화시켜 난연성을 증대시키는 특성이 있다.DBDPE is a representative bromine-based flame retardant, which has the property of enhancing flame retardancy by enhancing heat resistance and low heat build-up through bonding with thermosetting resin and fiber.
뿐만 아니라, 삼산화안티몬은 저독성이면서 특히 열경화성수지와 결합에 의한 난연 상승효과가 매우 큰 것으로 알려져 있다.In addition, it is known that antimony trioxide has a low toxicity and a very high synergistic effect of flame retardancy due to bonding with a thermosetting resin.
한편, 상기 경화제는 경화를 촉진하기 위한 것으로 TBPB(T-Butyl-peroxy Benzoate)와 같은 일반경화제를 사용함이 바람직하다.On the other hand, the curing agent is preferably a general curing agent such as TBPB (T-Butyl-peroxy Benzoate) for promoting curing.
그리고, 상기 증점제는 점탄성 조정제, 즉 점도를 조절하기 위해 첨가되는 것으로, 성형성을 좋게 하기 위한 것이다. 본 발명에서는 KYOWMAG(Magnesium Oxide)를 사용한다.The thickener is added to adjust the viscoelasticity adjusting agent, that is, the viscosity, so as to improve moldability. In the present invention, KYOWMAG (Magnesium Oxide) is used.
마지막으로, 상기 유리섬유는 치수안정화를 위해 첨가되며, 나아가 인장강도와 내구성을 강화시키기 위해 첨가된다.Finally, the glass fibers are added for dimensional stabilization and further added to enhance tensile strength and durability.
본 발명에 따른 상술한 도장 품질을 향상시킨 저비중 열경화성수지 조성물을 이용하여 성형되는 자동차용 부품의 외관 도장품질 특성을 확인하기 위해 10cm × 10cm × 1cm 크기의 시편을 제작하였다.A specimen having a size of 10 cm x 10 cm x 1 cm was prepared to confirm the appearance quality characteristics of an automobile part formed using the low specific gravity thermosetting resin composition having improved coating quality according to the present invention.
그리고, 시편을 샌딩처리한 후 돋보기를 이용하여 표면 품질을 확인하였다.Then, after the specimens were sanded, the surface quality was confirmed using a magnifying glass.
확인결과, 표면이 터지거나 기포가 생긴 곳이 확인되지 않았다.As a result, no surface was found or air bubbles were found.
또한, 샌딩처리한 면에 도장하고 도장 후 표면 품질도 확인하였다.Also, the surface to be sanded was painted, and the surface quality after coating was also confirmed.
샌딩 후 표면 품질이 거칠지 않고 고루고 균일하였기 때문에 도장 후 표면 품질도 매우 우수하였다. 즉, 불량이 발생하지 않았다.Since the surface quality after sanding was not rough, uniform and uniform, the surface quality after coating was excellent. That is, no defect occurred.
이에 따라, 저비중 필러에 의한 중량 증대 없이 도장 후 외관 품질을 확보할 수 있었다.As a result, the appearance quality after coating can be ensured without increasing the weight by the low specific gravity filler.
Claims (6)
불포화 폴리에스테르 수지 25-30중량%와, 충진제 25-30중량%와, 저비중 필러 4-7중량%와, 첨가제 2-6중량%와, 경화제 0.3-0.6중량%와, 증점제 0.7-1.2중량% 및 나머지 유리섬유로 이루어지되,
상기 충진제는 0.1-0.3㎛의 입도를 갖는 방해석 분말이고;
상기 저비중 필러는 0.22-0.45의 비중과 0.1-0.3㎛의 입도를 갖는 속이 비지 않는 중실체(中實體)인 목분 또는 화산재이며;
상기 첨가제는 난연제로서 수산화알루미늄:인/질소 복합화합물이 1:2의 중량비로 혼합된 것을 사용하고;
상기 경화제는 TBPB(T-Butyl-peroxy Benzoate)이며;
상기 증점제는 점도를 조절하기 위해 첨가되는 KYOWMAG(Magnesium Oxide)인 것을 특징으로 하는 도장 품질을 향상시킨 저비중 열경화성수지 조성물.The present invention relates to a low specific gravity thermosetting resin composition improved in coating quality for manufacturing automotive parts including a loop or a hood,
25-30% by weight of an unsaturated polyester resin, 25-30% by weight of a filler, 4-7% by weight of a low specific gravity filler, 2-6% by weight of an additive, 0.3-0.6% by weight of a curing agent, % And the remaining glass fibers,
The filler is calcite powder having a particle size of 0.1-0.3 mu m;
The low specific gravity filler is wood flour or volcanic ash, which is a hollow solid having a specific gravity of 0.22-0.45 and a grain size of 0.1-0.3 mu m;
Wherein the additive is a flame retardant mixed with aluminum hydroxide: phosphorus / nitrogen complex compound at a weight ratio of 1: 2;
The curing agent is TBPB (T-Butyl-peroxy Benzoate);
Wherein the thickening agent is KYOWMAG (Magnesium Oxide) added to control the viscosity of the low viscosity thermosetting resin composition.
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| KR20020031720A (en) | 2000-10-23 | 2002-05-03 | 이계안 | Low density thermosetting resin composition for outer panel of automobile |
| KR100439809B1 (en) | 2001-05-23 | 2004-07-12 | 현대자동차주식회사 | Methods for preparing low specific gravity thermosetting composite |
| KR20080014008A (en) * | 2005-05-09 | 2008-02-13 | 앳슈랜드 라이센싱 앤드 인텔렉츄얼 프라퍼티 엘엘씨 | Synergistic filler compositions and low density sheet molding compounds therefrom |
| KR20120134830A (en) * | 2011-06-03 | 2012-12-12 | 주식회사 한국 에이씨엠 | Smc sheet, complex sheet with smc sheet and molding method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20020031720A (en) | 2000-10-23 | 2002-05-03 | 이계안 | Low density thermosetting resin composition for outer panel of automobile |
| KR100439809B1 (en) | 2001-05-23 | 2004-07-12 | 현대자동차주식회사 | Methods for preparing low specific gravity thermosetting composite |
| KR20080014008A (en) * | 2005-05-09 | 2008-02-13 | 앳슈랜드 라이센싱 앤드 인텔렉츄얼 프라퍼티 엘엘씨 | Synergistic filler compositions and low density sheet molding compounds therefrom |
| KR20120134830A (en) * | 2011-06-03 | 2012-12-12 | 주식회사 한국 에이씨엠 | Smc sheet, complex sheet with smc sheet and molding method thereof |
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