KR20010085131A - Method of scratch-resistant multi-layer coating with silicon agent on the surface of polymer - Google Patents

Method of scratch-resistant multi-layer coating with silicon agent on the surface of polymer Download PDF

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KR20010085131A
KR20010085131A KR1020000012906A KR20000012906A KR20010085131A KR 20010085131 A KR20010085131 A KR 20010085131A KR 1020000012906 A KR1020000012906 A KR 1020000012906A KR 20000012906 A KR20000012906 A KR 20000012906A KR 20010085131 A KR20010085131 A KR 20010085131A
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silicon
based hard
hard film
alkali solution
hard coating
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KR1020000012906A
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Korean (ko)
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고성진
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김은엽
아주공업주식회사
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    • 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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • 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
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes

Abstract

PURPOSE: A method for coating a multilayer of polymer surface is provided, to allow the silicon-based hard coating multilayers to be formed for improving the hardness, abrasion resistance and weather resistance of plastic surface. CONSTITUTION: The method comprises the steps of forming a silicon-based hard coating layer on a plastic material by thermosetting or UV curing; treating the plastic material with an alkali solution for increasing the hydrophilicity of the surface of the silicon-based hard coating layer, thereby allowing another silicon-based hard coating layer to be formed on the silicon-based hard coating layer; and repeating the previous two steps to form the multilayers.

Description

실리콘계 하드 코팅제에 의한 고분자 표면의 내마모 다층 코팅 방법{Method of scratch-resistant multi-layer coating with silicon agent on the surface of polymer}Method of scratch-resistant multi-layer coating with silicon agent on the surface of polymer}

본 발명은 플라스틱 표면(1)의 경도, 내마모성 및 내후성 향상 목적을 위하여, 실리콘계 Hard Coating제로써, 열경화 및 U.V 경화 Type으로 내스크레치성 하드막을 형성하는데 있어서, 1차 하드막 코팅(2)으로 물성을 만족하지 못하는 경우에, Alkali Solution 처리 방법(3과5)을 도입하여, 2차, 3차 즉 순차적인 코팅(4와6)이 가능하도록 하는 고분자 표면의 다층 코팅방법에 관한 것이다.In order to improve the hardness, abrasion resistance and weather resistance of the plastic surface (1), the present invention is a silicone-based hard coating agent, to form a scratch-resistant hard film in the thermosetting and UV curing type, as a primary hard film coating (2) When the physical properties are not satisfied, Alkali Solution treatment method (3 and 5) is introduced to the multilayer coating method of the polymer surface to enable the secondary, tertiary or sequential coating (4 and 6).

특히, 실리콘계 하드 코팅제는 Recoating시 실리콘 특성상 층간 접착력이 전혀 형성되지 않기 때문에, 본 발명에서 개발된 Alkali Solution 처리 공정(3과5)을 도입하여야만 순차적인 Recoating이 가능하며, 플라스틱 물성을 더욱 강화시킬 수 있다.In particular, since the silicone-based hard coating agent does not form any adhesion between the layers due to the silicone properties during recoating, the sequential recoating is possible only by introducing the Alkali Solution treatment process (3 and 5) developed in the present invention, and the plastic properties can be further enhanced. have.

Alkali Solution 처리공정은 실리콘계 하드막 표면을 활성화시켜 접촉각을 감소시키므로 층간 접착력이 형성된다. 실리콘계 하드막 표면의 활성화 상태를 확인하는데 있어서 물과의 접촉각은 중요한 인자이다. 물과의 접촉각이 감소된다는 것은 실리콘계 하드막 표면이 물을 Wetting시키는 것을 의미하며, 이는 실리콘계 하드막 표면이 친수성화 되었다는 것을 의미한다.Alkali Solution treatment process reduces the contact angle by activating the silicon-based hard film surface, thus forming interlayer adhesion. The contact angle with water is an important factor in confirming the activation state of the silicon-based hard film surface. The decreased contact angle with water means that the silicon hard film surface is wetted with water, which means that the silicon hard film surface is hydrophilized.

본 발명은 플라스틱 소재 표면(1)에 실리콘계 하드막(2)을 코팅시키고, 코팅된 실리콘계 하드막 표면(2)상에 Alkali Solutin 처리공정(3과5)을 도입하여 활성화 처리한 후, 2차, 3차 즉 순차적인 실리콘계 하드막 코팅(4와6)이 가능하도록 하는 것으로 이루어진 실리콘계 하드막과 하드막간의 층간 활성화(3과5) 및 다층 코팅(4와6)이 가능하도록 하는 공정이다.The present invention is coated with a silicon-based hard film (2) on the surface of the plastic material 1, the Alkali Solutin treatment process (3 and 5) is introduced on the coated silicon-based hard film surface (2), and then activated. It is a process for enabling interlayer activation (3 and 5) and multi-layer coating (4 and 6) between the silicon-based hard film and the hard film, which are made to enable the third or sequential silicon-based hard film coatings 4 and 6.

본 발명에 사용된 접촉각 시험법은 실리콘계 하드막 표면과 증류수 물방울이접촉하는 지점에서 증류수 물방울의 표면에 접선을 이었을 때, 이 접선과 실리콘계 하드막 표면이 이루는 각도를 말하며, 측정값을 정량적으로 나타나게 하므로 많이 이용되고 있다. 만일 접촉각이 작아진다고 하면, 이것은 증류수 물방울이 실리콘계 하드막 표면위에 넓고 얇게 퍼지게 됨을 의미하며, 따라서, 실리콘계 하드막 표면의 물에 대한 흡착성 즉 친수성이 증가 된다는 것을 뜻한다.The contact angle test method used in the present invention refers to the angle formed between the tangent and the silicon-based hard film surface when the silicon hard film is in contact with the surface of the distilled water drop at the point where the distilled water droplet is in contact with each other. As it is used a lot. If the contact angle becomes smaller, this means that the distilled water droplets spread widely and thinly on the surface of the silicon-based hard film, thus increasing the adsorption to water on the surface of the silicon-based hard film, that is, hydrophilicity.

이러한 접촉각 시험기는 ERMA 접촉각 측정기(Contact Anglemeter)를 사용하여, 0.025ml의 증류수 물망울을 실리콘계 하드막 표면중 네 위치에 떨어뜨린 후 그 접촉각을 현미경으로 측정하여, 네 위치의 측정값의 평균값으로 정해진다. 본 발명에서 실리콘계 하드막의 경우 Alkali Solution 처리에 의해 Contact Angle이 현저히 감소되었으며, 충분한 층간 접착력을 가질 수 있는 친수성 표면으로 되어, 순차적인 Recoating이 가능하여 아주 뛰어난 층간 접착력이 형성되었다.The contact angle tester uses an ERMA contact angle meter to drop 0.025 ml of distilled water droplets at four positions on the surface of the silicon-based hard film, and then measures the contact angle with a microscope to determine the average of the measured values at the four positions. All. In the present invention, in the case of the silicon-based hard film, the contact angle was significantly reduced by Alkali solution treatment, and the hydrophilic surface was able to have sufficient interlayer adhesion, so that the sequential recoating was possible, and thus excellent interlayer adhesion was formed.

본 발명의 더욱 상세한 설명은 폴리카보네이트(Poly Carbonate), PMMA(Poly Methyl Methacrylate) 및 폴리 에테르 설폰(Poly Ether Sulfone)등의 투명, 반투명 및 불투명 플라스틱 재질에 실리콘계 하드코팅제로 다층 코팅을 형성하여 유리와 유사한 수준의 내마모성을 갖는 내마모막 제조시 적용되는 방법으로서 층간 활성화 및 물성강화 기술이다.A more detailed description of the present invention is to form a multilayer coating with a silicone-based hard coating agent on a transparent, translucent and opaque plastic material such as polycarbonate, poly methyl methacrylate (PMMA), and poly ether sulfone (poly ether sulfone). As a method applied in the production of a wear resistant film having a similar level of wear resistance, it is an interlayer activation and physical property enhancement technology.

Silicon계 하드막(2)의 평활표면에 화학적 방법 즉 Alkali Solution에 의해 일부 결합이 끊어져서 표면이 조화활성화되어, 접촉면적을 넓힘과 동시에, 물리적으로는 凹부 형성에 의한 미세한 요철을 형성시켜 고리효과(anchoring effect)가 커짐으로 인해 친수성이 부여되어 화학적으로는 수소 결합등에 의해 접착력이 증가하게 된다.On the smooth surface of the silicon-based hard film 2, some bonds are cut off by chemical method, that is, Alkali Solution, and the surface is harmonically activated. (anchoring effect) increases hydrophilicity and chemically increases adhesion due to hydrogen bonding.

Fig1. 은 실리콘계 하드막의 표면상태를 나타낸 사진(SEM 분석)이며, Alkali Solution 처리방법으로 처리된 실리콘계 하드막의 표면 상태를 SEM (Scanning Electron Microscopy)분석법으로 관찰하여 표면형상을 도식도로 Fig 2.에 나타내었으며, 아주 미세한 돌출부가 형성되어 있는 것을 볼 수 있다. 이와 같은 사실은 Silicon계 하드막(2)상에 친수성기가 이미 생성되었음을 확인해 주는 것이며, 층간 부착성을 증대시키는 중요한 요인으로 볼 수 있다.Fig1. Is a photograph showing the surface state of the silicon-based hard film (SEM analysis), and the surface shape of the silicon-based hard film treated with Alkali Solution treatment method was observed by SEM (Scanning Electron Microscopy) analysis. You can see that very fine protrusions are formed. This fact confirms that the hydrophilic group is already formed on the silicon-based hard film 2, and can be seen as an important factor for increasing the interlayer adhesion.

도 4. 는 Alkali Solution 처리가 도입된 실리콘계 하드막의 Adhesive Mechanism을 그림으로 추정해 보았으며, 4-2와 4-4가 실리콘계 하드막의 일부결합이 끊어져 표면구조가 변화된 것을 도식화 한것이며, 4-3 과 4-5는 순차적으로 하드막이 Recoating된 것을 도식화 한 것이다.Figure 4 shows the adhesive mechanism of the silicon-based hard film to which the Alkali solution treatment was introduced. Figure 4-4 illustrates the change in surface structure due to the partial bonding of the silicon-based hard film to 4-2 and 4-4. And 4-5 illustrate the recoating of the hard film sequentially.

Alkali Solution Agent의 배합 및 처리법은 NaOH(Solid) 1~30 중량 %, 증류수 70~100 중량 %로 배합 조제하여, 온도는 약 60℃ 정도, 시간은 약 1~10분 정도로 침적, 초음파 침적, 이송되는 침적방식 및 스프레이 방식으로 처리하여 실리콘계 하드막을 활성화시키고, 유수로서 수세 후, 건조하는 공정이다.Alkali Solution Agent is formulated and treated with NaOH (Solid) 1 ~ 30% by weight, distilled water 70 ~ 100% by weight. Temperature is about 60 ℃ and time is about 1 ~ 10 minutes. It is a process of activating a silicone type hard film | membrane by processing by the immersion method and the spray method, and washing after washing with flowing water and drying.

Alkali Solution 처리법의 특징은 조화상태가 미세하고 처리후 얼룩이 없으며 특별한 장치를 필요로 하지 않는 것이다. Alkali Solution의 배합 및 처리조건은 아주 중요하며, 너무 강해도 바람직한 효과를 얻을 수 없다.The Alkali Solution treatment is characterized by its fine condition, no stain after treatment and no special equipment. The formulation and treatment conditions of Alkali Solution are very important and too strong to achieve the desired effect.

..

도 1. 은 본 발명의 실시예의 다층코팅 공정도1 is a multilayer coating process diagram of an embodiment of the present invention

도 2. 는 본 발명의 일측면 다층 코팅 단면 구성도Figure 2 is a cross-sectional configuration of one side multilayer coating of the present invention

도 3. 는 본 발명의 양측면 다층 코팅 단면 구성도Figure 3 is a cross-sectional configuration of both sides of the multi-layer coating of the present invention

도 4. 는 본 발명의 Adhesive Mechanism의 단면 구성도Figure 4 is a cross-sectional configuration of the adhesive mechanism of the present invention

Fig 1. 은 Silicon계 하드막의 표면상태를 나타낸 사진(SEM 분석)Fig 1. is a photograph showing the surface state of a silicon hard film (SEM analysis)

Fig 2. 는 Alkali Solution 처리된 Silicon계 하드막의 표면상태를 나타낸 사진(SEM 분석)Fig 2. is a photograph showing the surface state of Alkali Solution treated silicon hard film (SEM analysis)

※ 도면의 각 부분에 대한 부호의 설명※ Explanation of code about each part of drawing

1 ; 플라스틱 소재 2 ; 1차 실리콘계 하드막One ; Plastic material 2; Primary Silicon Hard Film

3 ; Alkali Solution처리 4 ; 2차 실리콘계 하드막3; Alkali Solution Treatment 4; Secondary Silicon Hard Film

5 ; Alkali Solution처리 6 ; 3차 실리콘계 하드막5; Alkali Solution Treatment 6; Tertiary Silicon Hard Film

이하 본 발명의 실리콘계 하드 코팅제에 의한 고분자 표면의 다층코팅방법을 첨부도면을 참조하여 설명하면 다음과 같다.Hereinafter, the multilayer coating method of the polymer surface by the silicone-based hard coating agent of the present invention will be described with reference to the accompanying drawings.

도 2.와 도 3.은 본 발명의 일측면 또는 양측면 다층코팅 단면 구성도로써 PC, PMMA, 및 PES 등의 Plastic재질(1)에 실리콘계 하드코팅제로 하드막(2)를 형성한 다음, Alkali Solution으로 활성화 처리(3)를 한 후, 실리콘 하드막(4)를 형성하는 순으로 Alkali Solution 처리 방법을 도입하여, 플라스틱 소재의 일면 또는 양측면에 순차적인 하드막(4와6) 코팅이 가능하여, 물성이 유리와 유사한 수준의 내마모막을 얻을수 있게 된다.Figures 2 and 3 is a cross-sectional view of one side or both sides of the multi-layer coating of the present invention to form a hard film (2) with a silicone-based hard coating agent on the plastic material (1), such as PC, PMMA, and PES, Alkali After the activation treatment (3) with the solution, the Alkali Solution treatment method was introduced in the order of forming the silicon hard film (4), so that it is possible to sequentially coat the hard films (4 and 6) on one or both sides of the plastic material. As a result, the wear properties of the glass can be similar to that of glass.

플라스틱 재질은 다른 재료에 비해 상대적으로 가볍고 제품 디자인에 유연성을 주며, 기타 우수한 제반 물성을 가지고 있어 자동차의 고정창, 가전제품, 사무기기 분야에서 사용이 갈수록 확대되고 있지만, 표면의 내스크레치나 내마모성의 문제로 인해 사용이 제한되고 있는 것이 현실이다. 특히, 유리 대체용 플라스틱의 경우 경도가 낮기 때문에 사용 범위의 제한을 많이 받고 있다. 본 발명에서는 실리콘계 하드코팅제에 의한 고분자 표면의 물성을 Alkali Solution 처리 방법을 도입하여 순차적인 코팅 즉 다층코팅이 가능하도록하여, 매우 우수한 경도 및 내마모막을 얻을 수 있어, 유리대체용으로 가능하며 상업화시 경쟁력있는 제품을 생산할 수 있는 효과가 있다.Plastic materials are relatively lighter than other materials, provide flexibility in product design, and have excellent physical properties. They are increasingly being used in automobile fixed windows, home appliances, and office equipment. The reality is that use is limited due to problems. In particular, plastics for glass replacement have been limited in the range of use because of the low hardness. In the present invention, by introducing the Alkali Solution treatment method of the physical properties of the polymer surface by the silicone-based hard coating agent to enable sequential coating, that is, multi-layer coating, it is possible to obtain a very excellent hardness and wear-resistant film, it is possible for glass replacement and commercialization It has the effect of producing a competitive product.

Claims (2)

폴리카보네이트, PMMA, PES 등의 플라스틱 소재에 실리콘계 하드 코팅제로써, 열경화 및 U.V 경화Type으로 내스크레치성 하드막을 형성하는데 있어서, Alkali Solution 처리 방법(3과5)을 도입하여, 2차, 3차 즉 다층코팅(4와6) 시키는 것을 특징으로 하는 방법Alkali Solution treatment methods (3 and 5) are introduced to form a scratch-resistant hard film in a thermosetting and UV curing type as a silicone-based hard coating agent on a plastic material such as polycarbonate, PMMA, PES, etc. That is, the method characterized in that the multi-layer coating (4 and 6) Alkali Solution Agent의 배합 및 처리법은 NaOH(Solid) 1~30 중량 %, 증류수 70~100 중량 %로 배합 조제하여, 온도는 약 60℃ 정도, 시간은 약 1~10분 정도로 침적, 초음파 침적, 이송되는 침적방식 및 스프레이 방식으로 처리하여 실리콘계 하드막을 활성화시키고, 유수로서 수세 후, 건조시키는 것을 특징으로 하는 방법.Alkali Solution Agent is formulated and treated with NaOH (Solid) 1 ~ 30% by weight, distilled water 70 ~ 100% by weight. Temperature is about 60 ℃ and time is about 1 ~ 10 minutes. The method characterized by activating the silicon-based hard film by treatment in a deposition method and a spray method, and drying after washing with running water.
KR1020000012906A 2000-02-28 2000-02-28 Method of scratch-resistant multi-layer coating with silicon agent on the surface of polymer KR20010085131A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100668258B1 (en) * 2005-05-24 2007-01-12 (주) 태양기전 The method of surface coating for plastic form and its using coating layer
US10361383B2 (en) 2015-07-06 2019-07-23 Samsung Display Co., Ltd. Plastic substrate and display device comprising the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5108793A (en) * 1990-12-24 1992-04-28 Armco Steel Company, L.P. Steel sheet with enhanced corrosion resistance having a silane treated silicate coating
JPH05230246A (en) * 1992-02-24 1993-09-07 Mitsubishi Rayon Co Ltd Molded object and production thereof
US5470616A (en) * 1992-12-23 1995-11-28 Mitsubishi Rayon Co., Ltd. Coated shaped articles and method of making same
US5698266A (en) * 1993-04-05 1997-12-16 Commissariat A L'energie Atomique Process for the production of thin coatings having optical and abrasion resistance properties

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5108793A (en) * 1990-12-24 1992-04-28 Armco Steel Company, L.P. Steel sheet with enhanced corrosion resistance having a silane treated silicate coating
JPH05230246A (en) * 1992-02-24 1993-09-07 Mitsubishi Rayon Co Ltd Molded object and production thereof
US5470616A (en) * 1992-12-23 1995-11-28 Mitsubishi Rayon Co., Ltd. Coated shaped articles and method of making same
US5698266A (en) * 1993-04-05 1997-12-16 Commissariat A L'energie Atomique Process for the production of thin coatings having optical and abrasion resistance properties

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100668258B1 (en) * 2005-05-24 2007-01-12 (주) 태양기전 The method of surface coating for plastic form and its using coating layer
US10361383B2 (en) 2015-07-06 2019-07-23 Samsung Display Co., Ltd. Plastic substrate and display device comprising the same
US11230632B2 (en) 2015-07-06 2022-01-25 Samsung Display Co., Ltd. Plastic substrate and display device comprising the same

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