KR20050090894A - Method for painting elastomer articles - Google Patents
Method for painting elastomer articles Download PDFInfo
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- KR20050090894A KR20050090894A KR1020040016213A KR20040016213A KR20050090894A KR 20050090894 A KR20050090894 A KR 20050090894A KR 1020040016213 A KR1020040016213 A KR 1020040016213A KR 20040016213 A KR20040016213 A KR 20040016213A KR 20050090894 A KR20050090894 A KR 20050090894A
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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
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/01—Hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
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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
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
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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
- C08J2483/00—Characterised by the use 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; Derivatives of such polymers
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
본 발명은 엘라스토머 성형품의 도장방법에 관한 것으로서, 하도 후에 액상 실리콘수지와 폴리아크릴 수지를 함유하는 수지 혼합물, 톨루엔, 에틸아세테이트 및 부틸아세테이트로 이루어진 혼합 용제를 함유하는 보호코팅 조성물을 도포하는 것을 특징으로 하며, 이에 의하면 고유한 탄성 및 유연성 때문에 도막이 잘 고착되지 않고 쉽게 박리되는 특성이 있는 엘라스토머 성형품에 고품질의 도장을 부여할 수 있게 되므로, 특히 핸드폰과 같은 전자제품의 외장에 엘라스토머 성형품이 다른 플라스틱 또는 금속 성형품과 조합되는 제품을 단일 톤으로 제조하는 것이 가능하게 된다. The present invention relates to a method for coating an elastomer molded article, comprising: applying a protective coating composition containing a mixed solvent consisting of a liquid silicone resin and a polyacrylic resin, toluene, ethyl acetate, and butyl acetate after coating; This makes it possible to give a high quality coating to an elastomer molded article having a property of easily peeling off the coating film due to its inherent elasticity and flexibility, and in particular, an elastomer molded article having a different plastic molded part from an exterior of an electronic product such as a mobile phone. It is possible to produce a single tone of the product combined with the molded article.
Description
본 발명은 수지 성형품을 도장하는 방법에 관한 것으로서, 보다 구체적으로는 우수한 밀착성 및 내박리성 도장을 엘라스토머 성형품에 형성시키는 방법에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating a resin molded article, and more particularly, to a method for forming an excellent molded adhesive and peelable coating on an elastomer molded article.
일반적으로 실리콘 러버, 폴리우레탄계 러버, 폴리올레핀계 러버 등과 같은 엘라스토머는 도장을 하더라도 고유한 탄성 및 유연성 때문에 도막이 잘 고착되지 않고 쉽게 박리되는 특성이 있다. 이러한 이유로 도장성이 불량한 엘라스토머 성형품이 도장성이 우수한 플라스틱 성형품 또는 금속 성형품과 조립된 제품, 예를 들어 핸드폰과 같은 제품의 경우, 도장성이 우수한 플라스틱 성형품 또는 금속 성형품은 도장에 의한 칼라를 갖게 되나 엘라스토머 성형품은 안료나 염료의 사용으로 칼라를 부여하게 되므로 이들 간에 칼라 및 광택 차이가 생겨 단일 톤을 갖는 제품의 제조가 실질적으로 불가능한 실정이다. In general, elastomers such as silicone rubbers, polyurethane rubbers, polyolefin rubbers, etc., have a property of easily peeling off the coating due to inherent elasticity and flexibility even when coated. For this reason, in the case of a product in which an elastomeric molded article having poor paintability is assembled with a plastic molded article or a metal molded article having excellent paintability, for example, a product such as a mobile phone, a plastic molded article or a metal molded article having excellent paintability has a color by coating. Elastomer molded products are colored by the use of pigments or dyes, so there is a difference in color and gloss between them, making it impossible to manufacture a product having a single tone.
따라서 본 발명의 주된 목적은 엘라스토머 성형품에 내박리성 도장을 형성시키는 방법을 제공하는 데에 있다. It is therefore a primary object of the present invention to provide a method of forming a peel resistant coating on an elastomer molded article.
상기한 과제를 해결하기 위한 본 발명자의 연구에서 엘라스토머 성형품에 플라스틱 성형품의 도장에 통상적으로 사용되는 하도도장을 한 후 액상 실리콘수지, 폴리아크릴 수지, 혼합용제 등을 특별히 한정된 양으로 함유하는 보호코팅 조성물로 상도도장을 하면 도장의 밀착성, 내박리성 등이 우수하게 되어 다른 재질의 도장 성형품과 같은 톤을 부여하는 것이 가능하게 된다는 사실을 알게되어 본 발명을 완성하게 된 것이다. Protective coating composition containing liquid silicone resin, polyacrylic resin, mixed solvent and the like in a limited amount after coating the elastomer which is commonly used for coating plastic molded articles in the study of the present inventors for solving the above problems. When the top coat is applied, the adhesiveness of the coating, the peeling resistance, and the like are excellent, and thus it is possible to impart the same tone as the paint molded article of another material, thereby completing the present invention.
그러므로 본 발명에 의하면 엘라스토머 성형품을 도장함에 있어서, 플라스틱 성형품의 도장에 통상적으로 사용되는 하도 조성물을 엘라스토머 성형품의 표면에 도포하는 하도공정과, 액상 실리콘수지와 폴리아크릴 수지를 함유하는 수지 혼합물 60-70중량%, 톨루엔, 에틸아세테이트 및 부틸아세테이트로 이루어진 혼합 용제 30-40중량%를 함유하는 보호코팅 조성물을 하도 위에 도포하는 상도 공정을 포함하는 것을 특징으로 하는 엘라스토머 성형품의 도장 방법이 제공된다. Therefore, according to the present invention, in coating an elastomer molded article, a coating process for applying a coating composition commonly used for coating a plastic molded article to the surface of the elastomer molded article, and a resin mixture containing a liquid silicone resin and a polyacrylic resin 60-70 There is provided a coating method of an elastomeric molded article comprising a top coat step of applying a protective coating composition containing 30% to 40% by weight of a mixed solvent consisting of% by weight, toluene, ethyl acetate and butyl acetate on the undercoating.
이하, 본 발명을 보다 상세하게 설명하기로 한다. Hereinafter, the present invention will be described in more detail.
본 발명에 따르는 엘라스토머 성형품 도장 방법에 있어서, 엘라스토머 성형품은 하도 공정을 수행하기 전에 전처리를 행하는 것이 바람직하다. 이러한 전처리 공정의 대표적인 예로는 성형품 표면에 묻어 있는 이물질을 제거하기 위한 세척공정, 성형품의 정전기를 제거하기 위한 제전 공정 등이 있다. In the elastomer molded article coating method according to the present invention, it is preferable that the elastomer molded article is pretreated before performing the undercoating process. Representative examples of the pretreatment process include a washing process for removing foreign matters on the surface of the molded article, an antistatic process for removing static electricity of the molded article, and the like.
본 발명에서 엘라스토머 성형품의 하도 공정은 경질플라스틱 제품이나 금속제품의 하도에 사용하는 통상의 하도도료를 사용하여 수행할 수 있다. 이러한 하도 도료는 당분야에 잘 알려져 있다. 그 한 예로 아크릴 수지와 무황변 폴리이소시아네이트를 주성분으로 하는 2액형 하도 도료가 있다. 상기한 하도도료는 다양한 색상 구현 및 유연성이 우수하고, 은폐력이 뛰어나고 작업성이 우수하여 많이 사용되고 있는 하도 도료이다. 일반적으로 하도도료를 도포할 때에는 주로 스프레이 방법이 이용된다. 하도 도료를 도포한 후에는 하도를 건조하며, 하도의 건조 도막 두께는 보통 7-11㎛ 정도가 적당하다. 하도를 완료한 후에는 중도를 하거나 또는 중도를 생략하고 하도 위에 직접 상도를 수행한다. The coating process of the elastomer molded article in the present invention can be carried out using a conventional coating material used for the hard plastic products or metal coating. Such paints are well known in the art. One example is a two-component undercoat with acrylic resin and yellowing polyisocyanate as main components. The above paint is a paint that is used a lot of excellent color implementation and flexibility, excellent hiding power and excellent workability. In general, the spray method is mainly used to apply the paint. After coating the paint, the coat is dried, and the coat thickness of the coat is usually about 7-11 μm. After completing the roadway, the roadway should be done or the roadway will be omitted and the roadway will be carried out directly on the roadway.
본 발명에 따르는 엘라스토머의 도장방법에 있어서, 상도에는 액상 실리콘수지와 폴리아크릴 수지를 함유하는 수지 혼합물 60-70중량%, 톨루엔, 에틸아세테이트 및 부틸아세테이트로 이루어진 혼합 용제 30-40중량%를 함유하는 보호코팅 조성물이 이용된다. 본 보호코팅 조성물에 있어서, 혼합수지 혼합물의 함량이 60중량% 보다 적은 경우에는 내박리성 및 밀착성이 우수한 도막을 얻기에 다소 미흡하며, 70중량%를 초과하는 경우에는 조성물의 도포성이 불량하게 될 수 있어 바람직하지 않다. 상기 수지 혼합물중 액상 실리콘수지 대 폴리아크릴 수지의 비율은 1: 9∼9:1, 보다 바람직하게 1:5 - 5:1 이다. In the coating method of the elastomer according to the present invention, the top coat contains 60-70 wt% of a resin mixture containing a liquid silicone resin and a polyacrylic resin, and 30-40 wt% of a mixed solvent composed of toluene, ethyl acetate and butyl acetate. Protective coating compositions are used. In the present protective coating composition, when the content of the mixed resin mixture is less than 60% by weight, it is somewhat insufficient to obtain a coating film having excellent peeling resistance and adhesion, and when it exceeds 70% by weight, the coating property of the composition is poor. It may be undesirable. The ratio of liquid silicone resin to polyacrylic resin in the resin mixture is 1: 9 to 9: 1, more preferably 1: 5 to 5: 1.
또한 본 보호코팅 조성물에는 조성물의 경화를 촉진시키기 위해 적당한 시너를 첨가할 수도 있다. 시너를 첨가한 보호코팅 조성물을 사용하면 도막의 내박리성을 보다 향상시킬 수 있어 바람직하다. 이 경우 시너의 함량은 조성물 100중량부 기준으로 1-3중량부가 적당하다. In addition, a suitable thinner may be added to the present protective coating composition to promote curing of the composition. It is preferable to use the protective coating composition which added the thinner, since the peeling resistance of a coating film can be improved more. In this case, the content of thinner is suitably 1-3 parts by weight based on 100 parts by weight of the composition.
특별히 제한하기 위한 것은 아니지만 상도 도막의 건조 두께는 25±5㎛ 정도가 적당하다. Although not particularly limited, the dry thickness of the top coat is preferably about 25 ± 5 μm.
본 발명은 모든 종류의 엘라스토머에 적용할 수 있으며, 그 대표적인 예를 들면 실리콘 러버, 폴리우레탄계 러버, 폴리올레핀계 러버 등이 있다. The present invention can be applied to all kinds of elastomers, and representative examples thereof include silicone rubber, polyurethane rubber, polyolefin rubber, and the like.
이하, 본 발명을 실시예의 방법으로 보다 상세하게 설명하기로 한다. 하기 실시예는 예시를 위한 것으로서 본 발명이 이에 제한되는 것은 아니다. Hereinafter, the present invention will be described in more detail by way of examples. The following examples are illustrative only and the present invention is not limited thereto.
[실시예 1 내지 3][Examples 1-3]
엘라스토머로서 멜트인덱스(ASTM D-1238) 35.0g/10mm, 인장강도(ASTM D-638) 13Kg/㎠(@ 5%), 17Kg/㎠(@ 10%), 50Kg/㎠(@ 50%), 인장신율(ASTM D-638) 567%, 굴곡강도(ASTM D-790) 23Kg/㎠, 굴곡탄성율 400kg/㎠, 경도(ASTM D-2240) 30D인 TRIEL 5302 SV (주식회사 삼양사에서 제조 판매되는 실리콘 러버)를 사용하여 핸드폰(애니콜)용 스크류 캡을 사출성형하고, 세척 및 제전후에 2액형 하도 실버(아크릴수지와 무황변 폴리이소시아네이트를 주성분으로 하며 펄 분말이 배합된 하도 도료)를 스프레이 건으로 분무코팅하고 건조로에서 60-70℃의 온도로 건조하였다. 건조된 하도 도막의 도께는 7-11㎛이었다. Melt index (ASTM D-1238) 35.0 g / 10 mm as elastomer, tensile strength (ASTM D-638) 13 Kg / cm 2 (@ 5%), 17 Kg / cm 2 (@ 10%), 50 Kg / cm 2 (@ 50%), Silicone rubber manufactured by Samyang Co., Ltd. Injection molding of the screw cap for the mobile phone (Anycall), and after spraying and spray coating with a two-component type undercoat silver (acrylic paint with acrylic resin and non-yellowing polyisocyanate and pearl powder) It was dried in a drying furnace at a temperature of 60-70 ℃. The thickness of the dried undercoating film was 7-11 micrometers.
다음 하기 표 1에 나타낸 바와 같은 조성으로 되는 보호코팅 조성물을 건조된 하도 위에 도포하고 건조라인에서 80-85℃의 온도로 건조하였다. 건조된 상도 도막 두께는 25±5㎛이었다. Next, a protective coating composition having a composition as shown in Table 1 was applied on the dried undercoat and dried at a temperature of 80-85 ° C. in a drying line. The dried top coat thickness was 25 ± 5 μm.
도장이 완료된 엘라스토머 소재의 스크류 캡의 도장품질을 평가하기 위하여 다음과 같은 방법으로 시험하였다. 시험결과는 표 2에 제시된다. In order to evaluate the coating quality of the screw cap of the finished elastomer material was tested in the following manner. The test results are shown in Table 2.
침염시험: 흑색 수성펜(모나미 Pluspen 3000)을 시편에 칠하고 50℃, 95% 항온항습기에 1시간 방치하고 상온에서 1시간 방치한 후 메틸알콜(99.3%)을 묻혀 닦아낸후 침염여부 검사. 흑색 유성펜(모나미 Namepen)을 시편에 칠하고 50℃, 95% 항온항습기에 1시간 방치하고 상온에서 1시간 방치한 후 메틸알콜(99.3%)을 묻혀 닦아낸 후 침염여부 검사. 시편수는 2개.Immersion Test: Apply black aqueous pen (Monami Pluspen 3000) to the specimen, and leave it for 1 hour at 50 ° C and 95% constant temperature and humidity chamber, and leave it for 1 hour at room temperature, then wipe it with methyl alcohol (99.3%) and check for infection. Apply black oil pen (monami namepen) to the specimen, leave for 1 hour in a 50%, 95% constant temperature and humidity chamber, leave for 1 hour at room temperature, wipe off with methyl alcohol (99.3%), and then check for infection. Number of specimens is two.
자외선 시험 : 자외선램프 (15W, UV-B Type)와 시료간을 20cm 이격하여 72시간 방치후 변색 및 탈색여부를 검사. Ultraviolet test: Inspect UV discoloration and discoloration after leaving for 72 hours after separating UV lamp (15W, UV-B Type) and sample 20cm apart.
낙추시험 : 낙추시험기에서 500g추로 50cm 높이에서 취약부를 각 2회 낙추시험하여 깨짐이 있는지를 검사. Fall test: In the fall tester, 500g weight is used to test the weak part twice each at 50cm height for fall test.
내마모 시험 : 인쇄수명시험기에서 500g의 연필지우개로 왕복 1500회 문질러 박리여부 검사. Abrasion resistance test: A 500 g pencil eraser rubs 1500 round trips on the print life tester to check for peeling.
내약품 시험 : 인쇄수명시험기에서 500g의 연필지우개 + 왕복 1500회 + 메틸알콜 99.3%의 조건하에 박리여부 검사. Chemical resistance test: A 500 g pencil eraser + 1500 round trips + methyl alcohol 99.3% for peeling test in the printing life tester.
엑스커팅(X-cutting) 시험: 1mm로 엑스커팅하고 테이프(혜성 OPP 점착 테이프 KSA-1514)로 착탈3회실시하여 들뜸 여부를 검사. X-cutting test: Extruded to 1mm and detached with a tape (comet OPP adhesive tape KSA-1514) three times to check for lifting.
내완충액 시험: 표준용액 pH 4.6액에 72시간 방치→ 수세→ 물기제거→ 상온 4시간 방치→ 2mm 간격 엑스커팅 → 테이프착탈 1회의 과정을 거치면서 표면불량 및 들뜸이 없는 지를 검사. Buffer-resistant test: left for 72 hours in standard solution pH 4.6 solution → washing with water → dehydration → standing for 4 hours at room temperature → 2mm intervals cutting → removal of tapes.
고온고습 시험: 50℃, 95% 챔버에 72 시간 방치 → 수세 → 물기제거 → 상온 4시간 방치 → 2mm 간격 엑스커팅 → 테이프착탈 1회의 과정을 거치면서 표면불량 및 들뜸이 없는 지를 검사. High temperature and high humidity test: 72 hours in a 95% chamber at 50 ° C → water washing → dehydration → 4 hours at room temperature → 2mm intervals cutting → removal of tapes Checking for surface defects and lifting.
염수분무 시험: 5% 염화나트륨, 35℃, 72 시간 방치 → 수세 → 물기제거 → 상온 4시간 방치 → 2mm 간격 엑스커팅 → 테이프착탈 1회의 과정을 거치면서 표면불량 및 들뜸이 없는 지를 검사. Brine spray test: 5% sodium chloride, 35 ℃, 72 hours left → water washing → Drain → room temperature 4 hours left → 2mm intervals cutting → removal of the tape in one process to check for surface defects and lifting.
열충격 시험: 40℃ 2시간- 85℃ 2시간/ 1 사이클 기준, 15 사이클 챔버에 방치 → 수세 → 물기제거 → 상온 4시간 방치 → 2mm 간격 엑스커팅 → 테이프착탈 1회의 과정을 거치면서 표면불량이 없는 지를 검사. Thermal shock test: 40 ℃ for 2 hours-85 ℃ for 2 hours / 1 cycle, left in 15 cycle chamber → washing with water → dehydration → standing for 4 hours at room temperature → 2mm interval cutting → tape removal Checking.
내화장품 시험: 크림(자외선 차단크림인 SPF 20: Nivea Sun Spray)을 시편에 균일하게 도포 → 온도 80℃, 습도 80% 챔버에 방치 → 수세 → 물기제거 → 상온 4시간 방치 → 2mm 간격 엑스커팅 → 테이프착탈 1회의 과정을 거치면서 표면불량 및 들뜸이 없는기를 검사. Resistant cosmetic test: Apply the cream (ultraviolet screening cream SPF 20: Nivea Sun Spray) uniformly to the specimen → leave it in a chamber at a temperature of 80 ° C and a humidity of 80% → flush → remove water → leave for 4 hours at room temperature → 2 mm interval extracting → Inspection of surface defect and no lifting by going through the process of attaching and detaching tape.
상기 표 2의 시험결과로부터 알 수 있는 바와 같이 적으로 본 발명에 의하면 고유한 탄성 및 유연성 때문에 도막이 잘 고착되지 않고 쉽게 박리되는 특성이 있는 엘라스토머 성형품에 고품질의 도장을 부여할 수 있게 되므로, 특히 핸드폰과 같은 전자제품의 외장에 엘라스토머 성형품이 다른 플라스틱 또는 금속 성형품과 조합되는 제품을 단일 톤으로 제조하는 것이 가능하게 된다. As can be seen from the test results of Table 2, according to the present invention, because of its inherent elasticity and flexibility, it is possible to give a high-quality coating to an elastomer molded article having a property of easily peeling off the coating film and being easily peeled off. It is possible to manufacture a single tone product in which an elastomer molded article is combined with another plastic or metal molded article in an exterior of an electronic product such as the same.
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| KR100774557B1 (en) * | 2006-08-31 | 2007-11-08 | 강원대학교산학협력단 | A coating method of pear lescent pigment for cellular phone |
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| US5973067A (en) | 1995-11-28 | 1999-10-26 | Dow Corning Toray Silicone Co., Ltd. | Primer composition and adhesion method |
| JP2862508B2 (en) * | 1996-05-30 | 1999-03-03 | 三菱自動車工業株式会社 | Automotive coating composition and coating method |
| KR100579832B1 (en) * | 2003-06-02 | 2006-05-15 | 주식회사 삼양이엠에스 | Photo Resist Composition For Spinless Coating |
| KR20050051089A (en) * | 2003-11-27 | 2005-06-01 | 나노캠텍주식회사 | Manufacture of conductive pressure sensitive adhesion protective film |
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