KR20140077274A - Coating Composition for Paint Protection Film - Google Patents
Coating Composition for Paint Protection Film Download PDFInfo
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- KR20140077274A KR20140077274A KR1020120145853A KR20120145853A KR20140077274A KR 20140077274 A KR20140077274 A KR 20140077274A KR 1020120145853 A KR1020120145853 A KR 1020120145853A KR 20120145853 A KR20120145853 A KR 20120145853A KR 20140077274 A KR20140077274 A KR 20140077274A
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- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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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
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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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
- C08L83/00—Compositions of 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; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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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
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
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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
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
Abstract
Description
본 발명은 자동차 도장 보호필름(Paint Protection Film,PPF)으로 사용하는 무황변 열가소성 폴리우레탄 엘라스토머(Aliphatic Thermoplastic Elastomer) 시트(Sheet)에 사용하는 내광변색, 광택, 내마모, 부착력, 내오염성이 우수한 투명 폴리우레탄계 코팅제 조성물에 관한 것으로 폴리우레탄 수지, 반응성 실리콘 디올, 소포제, 파라핀계 왁스,멜라민 경화제, 산촉매를 포함하는 자동차 도장 보호필름용 코팅제 조성물에 관한 것이다.
The present invention relates to a transparent plastic film for use in a non-halogenated thermoplastic polyurethane elastomer sheet for use as a paint film for protecting an automobile (PPF), which is excellent in light resistance to discoloration, gloss, abrasion resistance, adhesion, The present invention relates to a polyurethane-based coating composition, and more particularly, to a coating composition for an automobile coating protective film comprising a polyurethane resin, a reactive silicone diol, a defoaming agent, a paraffin wax, a melamine curing agent and an acid catalyst.
무황변(Aliphatic) 열가소성 폴리우레탄계 도장 보호필름의 경우 외부 노출 시 빛이나 열에 의한 변색은 매우 우수하지만 먼지, 곤충이나 조류의 배설물 등에 노출 시 세척이 쉽게 되지 않아 오염이 잘되고 있다. 또한 비가 수분에 노출 시 건조가 빨리 이루어지지 않아 필름 내구성 저하가 발생하고 있다.Aliphatic thermoplastic polyurethane coating protective films are excellent in light discoloration due to light or heat when exposed to the outside, but they are not easily cleaned when exposed to dust, insects or algae excrements. In addition, when the rain is exposed to moisture, the film is not dried quickly and the durability of the film is deteriorated.
이러한 단점을 극복하기 위해 필름에 코팅을 하는데, 일반적으로 사용되고 있는 아크릴계, 에폭시계, 멜라민계는 경도가 높아 코팅 후 코팅층이 깨지는 현상이 발생하여 적용하기가 어려운 점이 있었다.
In order to overcome such disadvantages, the coating is applied to a film. However, acrylic, epoxy, and melamine systems generally used have a high hardness, so that a coating layer is broken after coating, which is difficult to apply.
본 발명은 상기와 같은 문제점을 해결하기 위해 우레탄구조를 소프트 세그먼트로 아크릴폴리올, 반응성 실리콘디올과 지방족 이소시아네이트로 구성하였고 하드세크먼트로 부탄디올과 지방족이소시아네이트로 구성하였다. 코팅제 내구성 향상을 위해 UV안정제와 소포제, 파라핀왁스를 첨가하여 부가적인 기능도 추가하여 자동차 도장 보호필름에 내광변색과 광택, 내마모, 부착력, 내오염성이 향상된 코팅제 조성물을 제공하는데 있다.
In order to solve the above problems, the present invention provides a urethane structure composed of an acrylic polyol, a reactive silicone diol and an aliphatic isocyanate as a soft segment, and a butane diol and an aliphatic isocyanate as a hard segment. The present invention also provides a coating composition comprising a UV stabilizer, a defoamer, and paraffin wax added to enhance the durability of a coating, thereby improving the discoloration resistance, luster, abrasion resistance, adhesion and stain resistance of an automotive coating film.
본 발명의 지방족 열가소성 폴리우레탄계 도장보호 필름용 코팅제 조성물은 (1) 아크릴폴리올 100 중량부, (2) 반응성 실리콘 디올 0.5 내지 1 중량부, (3) 지방족 또는 지환족 이소시아네이트 15 내지 25 중량부 (4) 쇄 연장제, 예를 들어 부탄 디올 부탄디올 5 내지 10중량부로 이루어지는 폴리 우레탄 조성물 20 내지 30 중량부와 유기 용제 70 내지 80 중량부로 이루어진다. 이 조성물 100중량부에 멜라민 경화제 1 내지 5 중량부, 산촉매 1 내지 5 중량부, 파라핀 왁스 1 내지 5 중량부, 소포제, 예를 들어 폴리실록산 0.1 내지 3 중량부를 포함할 수 있다.
The coating composition for an aliphatic thermoplastic polyurethane coating protective film of the present invention comprises (1) 100 parts by weight of an acrylic polyol, (2) 0.5 to 1 part by weight of a reactive silicone diol, (3) 15 to 25 parts by weight of an aliphatic or alicyclic isocyanate 20 to 30 parts by weight of a polyurethane composition comprising 5 to 10 parts by weight of a chain extender such as butane diol butanediol, and 70 to 80 parts by weight of an organic solvent. 1 to 5 parts by weight of a melamine curing agent, 1 to 5 parts by weight of an acid catalyst, 1 to 5 parts by weight of a paraffin wax, and 0.1 to 3 parts by weight of a defoaming agent such as polysiloxane may be added to 100 parts by weight of the composition.
본 발명의 코팅제 조성물은 내광변색과 광택, 내마모, 부착력, 내오염성이 우수하다.
The coating composition of the present invention is excellent in light fast discoloration and gloss, abrasion resistance, adhesion and stain resistance.
본 발명의 자동차 도장 보호 필름용 코팅제 조성물은 아크릴폴리올 100중량부, 반응성 실리콘 디올 0.5 내지 1 중량부, 쇄연장제 5 내지 10 중량부, 지방족 또는 지환족 이소시아네이트 15 내지 25 중량부를 혼합, 중첨가반응을 통해 중합 수지를 제조하고 이 중합물 20 내지 30 중량부를 플라스크 내 투입 후 메칠에칠케톤 등의 유기 용제 80 내지 70 중량부를 투입하여 교반기 알피엠(RPM) 700 내지 800을 유지하여 중합수지가 완전히 용해될 때까지 교반한다. 용해가 완전히 되었을 때 멜라민 경화제 1 내지 5 중량부, 산 촉매 1 내지 5중량부, 파라핀 왁스 1 내지 5 중량부, 폴리실록산 등의 소포제 0.1 내지 3 중량부를 부가하여 경화시켜 이루어지는 코팅제 조성물로 구성되어 있다.
The coating composition for an automobile coating protective film of the present invention comprises 100 parts by weight of an acrylic polyol, 0.5 to 1 part by weight of a reactive silicone diol, 5 to 10 parts by weight of a chain extender, and 15 to 25 parts by weight of an aliphatic or alicyclic isocyanate, , 20 to 30 parts by weight of the polymerized material is put in a flask, and 80 to 70 parts by weight of an organic solvent such as methyl ethyl ketone and the like are added to maintain a stirrer's RPM of 700 to 800 to completely dissolve the polymerized resin Stir until stirring. 1 to 5 parts by weight of a melamine curing agent, 1 to 5 parts by weight of an acid catalyst, 1 to 5 parts by weight of a paraffin wax, and 0.1 to 3 parts by weight of a defoaming agent such as polysiloxane are added and cured when the dissolution is completed.
본 발명에 사용되는 아크릴폴리올은 부착성, 가공성, 내블록킹성, 상용성이 우수한 것으로 수산기값이 37 내지 44 mgKOH/g이 이루어져 있고 코팅제 내마모, 오염방지 기능을 부여하기 위해 반응성 실리콘 디올을 적용하였으며 수산기 함유율이 0.07wt% 인 것을 혼합하여 신장율이 600% 이상 되는 지방족 열가소성 폴리우레탄 시트를 연신 시 깨짐을 방지하기 위해 코팅제 신율을 높이기 위해 소프트 세그먼트(Soft-segment) 비율을 높이기 위해 총 혼합 폴리올 비율을 높인 것이 특징이다. 투명성과 광택, 내광 특성을 요구하는 제품으로 변색에 강한 지방족 또는 지환족 이소시아네이트를 적용하였다. 더욱 바람직하게는 헥사메틸렌 디이소시아네이트(HDI:Hexamethylene diisocyanate), 디시클로헥실메탄 디이소시아네이트(H12MDI:Dicyclohexylmethane diisocyanate), 이소포론 디이소시아네이트(IPDI:Isoporone diisocyanate) 이들 중 하나 또는 2 이상의 혼합물로 이루어지는 것으로 사용될 수 있다. 상기 쇄연장제는 에틸렌글리콜(ethylene glycol), 디에틸렌글리콜(diethylene glycol), 부탄디올(butane diol), 헥산디올(hexane diol) 등의 디올류로 이루어지는 것으로 되어있다.
The acrylic polyol used in the present invention is excellent in adhesion, workability, blocking resistance, compatibility, hydroxyl value is 37 to 44 mgKOH / g, and reactive silicone diol is applied And a hydroxyl group content of 0.07 wt% were mixed to thereby prevent an aliphatic thermoplastic polyurethane sheet having an elongation of 600% or more from being broken during stretching. To increase the softening rate of the coating, . Aliphatic or alicyclic isocyanates, which are resistant to discoloration, are applied to products that require transparency, gloss and light fastness. More preferably, it may be composed of one or a mixture of two or more of the following: hexamethylene diisocyanate (HDI), dicyclohexylmethane diisocyanate (H12MDI), isoporone diisocyanate (IPDI) have. The chain extender is composed of diols such as ethylene glycol, diethylene glycol, butane diol, and hexane diol.
본 발명에 따른 자동차 도장보호 필름 투명 코팅제용 폴리우레탄 제조방법은,The method for manufacturing a polyurethane for a vehicle coating protective film transparent coating agent according to the present invention comprises:
1) 아크릴폴리올 100 중량부와 반응성 실리콘디올 0.5 내지 1 중량부를 80 내지 100℃에서 30분간 교반하고 헥사메틸렌디이소시아네이트 등의 지방족 또는 지환족 이소시아네이트 15 내지 25 중량부를 혼합 폴리올에 투입 후 15 내지 20 분간 교반하는 1차 반응단계; 1) 100 parts by weight of an acryl polyol and 0.5 to 1 part by weight of a reactive silicone diol are stirred at 80 to 100 ° C for 30 minutes and 15 to 25 parts by weight of an aliphatic or alicyclic isocyanate such as hexamethylene diisocyanate is added to a mixed polyol, A first reaction step of stirring;
2) 1차 반응단계 후 쇄연장제 5 내지 10 중량부를 투입한 후 중합물이 백탁현상이 발생할 때까지 400 내지 800rpm으로 중합시키는 2차 반응단계;2) a second reaction step in which the polymer is polymerized at 400 to 800 rpm until 5 to 10 parts by weight of the chain extender after the first reaction step is added, followed by clouding of the polymer;
3) 상기 2차 반응단계에 도달 한 반응물은 금형에 옮겨 100 내지 120℃ 오븐에서 12시간 내지 15시간 숙성하는 숙성단계; 3) The reaction product which has reached the second reaction step is transferred to a mold and aged in an oven at 100 to 120 ° C for 12 to 15 hours;
4) 상기 3차 숙성단계에서 수득된 중합물을 용해가 쉽게 될 수 있도록 10 내지 15mm 직경으로 분쇄하는 분쇄단계;4) a pulverizing step of pulverizing the polymer obtained in the third aging step to a diameter of 10 to 15 mm so that dissolution can be easily performed;
5) 상기 분쇄단계에서 용해가 가능한 용기에 투입하고 엠이케이 70 내지 80중량부를 투입하고 800 내지 1000rpm으로 교반하면서 분쇄단계에서 수득한 폴리 우레탄 20 내지 30 중량부를 투입하여 용해하는 용해단계;5) Into the container capable of dissolving in the pulverization step, 70 to 80 parts by weight of emkei are added, and 20 to 30 parts by weight of polyurethane obtained in the pulverizing step while stirring is stirred at 800 to 1000 rpm to dissolve;
6) 상기 용해단계에서 수득한 고형분 30%에 코팅제가 도포 시 발생할 수 있는 기포 제거를 위한 소포제, 레벨링성을 부여하는 파라핀 왁스, 코팅 후 코팅제가 유기용제나 화학물질에 다시 용해되지 않도록 경화할 수 있는 멜라민 경화제 혼합단계; 6) A defoaming agent for eliminating air bubbles, a paraffin wax for imparting leveling property, and a coating agent after coating may be cured so as not to be dissolved again in organic solvents or chemicals, which may occur when the coating agent is applied to the solid content 30% A melamine curing agent mixing step;
7) 상기 혼합단계에서 수득한 혼합물은 경화제가 열에 의해 경화될 수 있도록 산 촉매를 투입하여 120 내지 150℃에서 2 내지 3분간 방치 후 완전히 경화시키는 경화단계; 7) The mixture obtained in the mixing step is cured by putting an acid catalyst so that the curing agent can be cured by heat, allowing it to stand at 120 to 150 ° C for 2 to 3 minutes, and then completely curing it;
들을 포함하여 이루어지는 짐을 특징으로 한다.
And < RTI ID = 0.0 > a < / RTI >
상기 1차 중합단계에서는 반응성이 느린 지방족 이소시아네이트와 충분한 반응을 유도하기 위해 간이 프리폴리머(Semi-prepolymer)로 우레탄을 형성하여 일정한 분자량이 형성될 수 있도록 유도하였다. 2차 중합단계에서 유기용제인 엠이케이, 톨루엔, 아세톤에 쉽게 용해될 수 있도록 쇄 연장제를 몰비(NCO/OH)가 1이하로 구성하여 반응비를 조절하였다. 반응비(NCO/OH)가 1이상인 경우 부반응으로 용해성이 떨어질 수 있다.
In order to induce a sufficient reaction with the aliphatic isocyanate having a low reactivity, the urethane was formed with a semi-prepolymer so that a constant molecular weight could be formed in the primary polymerization step. In the second polymerization step, the reaction ratio was controlled by setting the molar ratio (NCO / OH) of the chain extender to 1 or less so as to be easily soluble in organic solvents such as methylene, toluene and acetone. If the reaction ratio (NCO / OH) is 1 or more, the solubility may be lowered as a side reaction.
일반적인 폴리우레탄이 반응시 용제 내에서 프리폴리머 반응을 하는 방법이지만 본 발명에서는 세미 프리폴리머 반응을 통해 벌크상태의 칩을 획득 후 용제에 용해하는 방법으로 개발한 것이 특징이다.
The general polyurethane is a method for carrying out a prepolymer reaction in a solvent in the reaction, but the present invention is characterized in that a bulk chip is obtained through a semi-prepolymer reaction and then dissolved in a solvent.
Ingredients
*1 : JP-2240, 아크릴 폴리올-분자량 2500 (정우화인) * 1: JP-2240, Acrylic polyol - Molecular weight 2500 (Jung Woo Fine)
*2 : SF2000E, 반응성 실리콘 디올-분자량 19500 (케이씨씨) * 2: SF2000E, Reactive silicone diol - Molecular weight 19500 (KCC)
*3 : HDI, 헥사메틸렌디이소시아네이트-분자량 168 (독일 바이엘) * 3: HDI, hexamethylene diisocyanate - molecular weight 168 (Germany Bayer)
*4 : 부탄디올, 쇄연장제-분자량 90 (코리아피티지) * 4: Butanediol, chain extender - Molecular weight 90 (Korea Pigment)
*5 : Songnox 1010, 산화방지제 ( 송원산업 )
* 5: Songnox 1010, antioxidant (Songwon Industrial)
Ingredients
*6 : MEK, 유기용제 ( 미국 엑슨모빌 ) * 6: MEK, organic solvents (Exxon Mobil, USA)
*7 : BYK 333, 소포제 ( 독일 BYK ) * 7: BYK 333, Antifoaming agent (BYK, Germany)
*8 : Flex-W, 파라핀 왁스 ( 나노켐 ) * 8: Flex-W, paraffin wax (Nanochem)
*9 : D-ACE 553, 멜라민 경화제 ( 동성화학 ) * 9: D-ACE 553, melamine curing agent (Dongseo Chemical)
*10 : ADT-290, 산 촉매 ( 동성화학 ) * 10: ADT-290, acid catalyst (Dongseo Chemical)
*11 : DN-980S, 무황변 경화제( 애경화학 )
* 11: DN-980S, non-yellowing curing agent (Aekyung Chemical)
상기 제조된 코팅제는 폴리우레탄 중합 시 하드 세그먼트 량을 변량시켜 코팅 기재인 무황변 투명 폴리우레탄필름의 경도와 유사하게 설계하여 연신 시 코팅층이 파괴되지 않고 내광성, 광택, 내마모, 부착성이 우수한 성능이 발현되는 것을 확인하였다.
The prepared coating agent is designed to have a hardness similar to the hardness of a non-yellowing transparent polyurethane film as a coating substrate by varying the hard segment amount during polyurethane polymerization so that the coating layer is not broken at the time of drawing and excellent in light resistance, gloss, abrasion resistance, Was expressed.
측정 및 평가Measurement and evaluation
동성하이켐에서 개발한 NEOTHANE 9094AP 무황변TPU 150㎛ 필름 위에 도막 두께 10 내지 15㎛으로 콤마코팅 후 120℃에서 3 내지 5분 경화시킨 후 24시간 상온 숙성 후 물성을 측정하였다.
NEOTHANE 9094AP developed by Dongseong High Chem Co., Ltd., was coated on a TPU 150 mu m film with a coating thickness of 10-15 mu m, followed by curing at 120 deg. C for 3 to 5 minutes, and then physical properties were measured after aging at room temperature for 24 hours.
물성은 NEOTHANE 9094AP 무황변TPU 150㎛ 필름을 기준으로 100% 모듈러스, 인장강도, 신장율, 내광노화, 광택, 내마모, 부착성(코팅층) 시험으로 평가하였다.
The physical properties were evaluated by 100% modulus, tensile strength, elongation, light photoaging, gloss, abrasion resistance and adhesion (coating layer) test on NEOTHANE 9094AP non-yellowing TPU 150 μm film.
*1: 인장속도는 200mm/min로 ASTM D882에 준하여 측정* 1: Measured according to ASTM D882 at a tensile speed of 200 mm / min.
*2: *1과 상동* 2: * 1 and the same
*3: *1과 상동* 3: * 1 and the same
*4: Q-UV시험기, 50℃에서 15일간 조사 후 색차계로 측정* 4: Measured by colorimeter after Q-UV tester, irradiation at 50 ℃ for 15 days
*5: *4시험 후 광택계(60도)로 측정* 5: * 4 Measured with a gloss meter (60 degrees) after the test
*6: *4시험 후 Taber마모시험기로 측정* 6: Measured by Taber abrasion tester after 4 tests
*7: *4시험 후 인장기 시험* 7: * 4 Tensile test after test
*8: *4시험 후 엠이케이(MEK)용제를 스프레이 후 용해성 관찰
* 8: After spraying the MEK solvent after the test, the solubility was observed.
결과result
자동차 도장 보호필름으로 적용하는 동성하이켐 NEOTHANE 9094AP 150㎛ 무황변 폴리우레탄 필름의 경우 기계적 물성이 매우 우수한 특성을 나타내고 있으나 광택과 내마모성이 떨어지는 것을 확인할 수 있었다. 자동차 도장 면에 노출되는 제품으로 광택변화와 마모성은 매우 중요한 평가항목 판단된다.
Dongseong High-Chem NEOTHANE 9094AP 150 ㎛ non-yellowing polyurethane film applied as a protective film for automobile paint showed excellent mechanical properties but it was found to be inferior in gloss and abrasion resistance. It is a product that is exposed to automobile paint surface. It is judged that the change of gloss and abrasion are very important evaluation items.
본 발명에서의 실시예1의 경우 기계적 물성은 떨어지지만 내광노화, 광택, 내마모가 향상 되는 것을 확인할 수 있었다. 부착성 시험을 통해 코팅층이 파괴되지 않는 것도 확인 할 수 있었다. 실시예2와 3에서 하드세그먼트가 함량이 증가할수록 내광노화, 광택, 내마모가 향상되는 것을 확인하였다. 실시예 4에서 부착성 시험 시 신율이 약 450%되었을 때 코팅층이 부분파괴되는 것을 확인하였다. 실시예 1에서 4 모두 내용제성은 우수한 것으로 나타났다.
In the case of Example 1 of the present invention, it was confirmed that although the mechanical properties were poor, the photo-aging, gloss and abrasion resistance were improved. It was also confirmed that the coating layer was not destroyed by the adhesion test. In Examples 2 and 3, it was confirmed that the photo-aging, gloss and abrasion resistance were improved as the hard segment content increased. In Example 4, it was confirmed that the coating layer partially fractured when the elongation was about 450% in the adhesion test. All of Examples 1 to 4 showed excellent solvent resistance.
Claims (6)
100 parts by weight of an acrylic polyol, 0.5 to 1 part by weight of a reactive silicone diol, 15 to 25 parts by weight of an aliphatic or alicyclic diisocyanate and 5 to 10 parts by weight of a chain extender, and 100% modulus of 60 to 80 kg / A polyurethane composition for film coatings.
1 to 5 parts by weight of an organic solvent, 1 to 5 parts by weight of a melamine curing agent, 1 to 5 parts by weight of an acid catalyst, 1 to 5 parts by weight of a paraffin wax and 0.1 to 3 parts by weight of a polysiloxane antifoaming agent are added to 20 to 30 parts by weight of the polyurethane composition of claim 1 Coatings for automotive paint protective films, including.
아크릴폴리올은 분자량이 2000 내지 3000이고, 반응성 실리콘디올은 수산기가 0.03 내지 5.5kgKOH/g인 것을 특징으로 하는 자동차 도장 보호필름 코팅제용 폴리우레탄 조성물.
The method according to claim 1,
Wherein the acrylic polyol has a molecular weight of 2000 to 3000 and the reactive silicone diol has a hydroxyl value of 0.03 to 5.5 kg KOH / g.
지방족 디이소시아네이트는 헥사메틸렌디이소시아네이트, 디시클로헥실메탄 디이소시아네이트, 및 이소포론 디시소시아네이트로 구성되는 그룹으로부터 선택되는 것을 특징으로 하는 자동차 도장 보호필름 코팅제용 폴리우레탄 조성물.
The method according to claim 1,
Wherein the aliphatic diisocyanate is selected from the group consisting of hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, and isophorone dicyosocyanate.
상기 쇄 연장제는 에틸렌글리콜(ethylene glycol), 디에틸렌글리콜(diethylene glycol), 부탄디올(butane diol), 및 헥산디올(hexane diol)로 이루어지는 그룹에서 선택된 디올인 것을 특징으로 하는 자동차 도장 보호필름 코팅제용 폴리우레탄 조성물.
The method according to claim 1,
Wherein the chain extender is a diol selected from the group consisting of ethylene glycol, diethylene glycol, butane diol, and hexane diol. Polyurethane composition.
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