CN101735706A - Waterborne polyurethane modified epoxy steel structure anti-corrosive paint and preparation method thereof - Google Patents
Waterborne polyurethane modified epoxy steel structure anti-corrosive paint and preparation method thereof Download PDFInfo
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- CN101735706A CN101735706A CN201010022502A CN201010022502A CN101735706A CN 101735706 A CN101735706 A CN 101735706A CN 201010022502 A CN201010022502 A CN 201010022502A CN 201010022502 A CN201010022502 A CN 201010022502A CN 101735706 A CN101735706 A CN 101735706A
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- 239000004593 Epoxy Substances 0.000 title claims abstract description 37
- 239000004814 polyurethane Substances 0.000 title claims abstract description 31
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000003973 paint Substances 0.000 title claims description 4
- 238000000576 coating method Methods 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000011248 coating agent Substances 0.000 claims abstract description 44
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 239000006185 dispersion Substances 0.000 claims abstract description 12
- 239000013530 defoamer Substances 0.000 claims description 18
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- 239000000049 pigment Substances 0.000 claims description 15
- 239000002270 dispersing agent Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 13
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 8
- 229920000768 polyamine Polymers 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- -1 polysiloxane Polymers 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 239000003995 emulsifying agent Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 230000001804 emulsifying effect Effects 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229920001400 block copolymer Polymers 0.000 claims description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 2
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 16
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 12
- 238000012360 testing method Methods 0.000 description 10
- 239000011780 sodium chloride Substances 0.000 description 8
- 239000000758 substrate Substances 0.000 description 6
- 230000005856 abnormality Effects 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 229920006334 epoxy coating Polymers 0.000 description 3
- 238000009775 high-speed stirring Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000005028 tinplate Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000006221 furniture coating Substances 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- Paints Or Removers (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
本发明属于涂料技术领域，具体涉及一种水性聚氨酯改性环氧钢结构防腐涂料及其制备方法。该涂料A组分是对E-20改性后的分散体，作为固化剂的B组分，是用环氧和亲水性基团改性过的水性分散体，该体系具备一般水性涂料的优点同时，克服了水性环氧防腐涂料本身的一些缺陷，同时具备聚氨酯和环氧的优点，以它为基料制备的水性环氧防腐蚀涂料在桥梁、管道、集装箱、工业厂房和公共设施等钢铁结构领域有着巨大的发展前景。The invention belongs to the technical field of coatings, and in particular relates to a water-based polyurethane modified epoxy steel structure anticorrosion coating and a preparation method thereof. Component A of the coating is a dispersion after modification of E-20. As a curing agent, component B is a water-based dispersion modified with epoxy and hydrophilic groups. This system has the characteristics of general water-based coatings. At the same time, it overcomes some defects of water-based epoxy anti-corrosion coating itself, and has the advantages of polyurethane and epoxy at the same time. The water-based epoxy anti-corrosion coating prepared based on it is used in bridges, pipelines, containers, industrial plants and public facilities The field of steel structures has great development prospects.
Description
技术领域technical field
本发明属于涂料技术领域，具体涉及一种水性聚氨酯改性环氧钢结构防腐涂料及其制备方法。The invention belongs to the technical field of coatings, and in particular relates to a water-based polyurethane modified epoxy steel structure anticorrosion coating and a preparation method thereof.
背景技术Background technique
随着环境保护的要求日益严格，低VOC或零VOC以及其HAPs(有害空气污染物，hazardous airpollution)的水性涂料的研究，以研制出适应市场需要的新产品，是涂料的重要发展方向。With the increasingly stringent requirements of environmental protection, the research of low VOC or zero VOC and its HAPs (hazardous air pollution) water-based coatings to develop new products that meet the needs of the market is an important development direction of coatings.
水性环氧树脂作为钢结构、木材等基材的涂料使用的时候，固化后硬度和拉伸强度大、涂膜光泽度高、对各类底材黏附力好、耐化学品性优异、电绝缘性好且品种多样、价廉易得等优点，已经广泛地应用各种钢结、木材等基材的涂料领域。但是，人们也发现水性环氧树脂还存在一些缺点，比如膜的柔性不够，耐老化、抗粉化的性能不好等。When water-based epoxy resin is used as a coating for steel structures, wood and other substrates, it has high hardness and tensile strength after curing, high gloss of the coating film, good adhesion to various substrates, excellent chemical resistance, and electrical insulation. With the advantages of good performance, various varieties, low price and easy availability, it has been widely used in the coating field of various steel knots, wood and other substrates. However, people have also found that water-based epoxy resins still have some shortcomings, such as insufficient flexibility of the film, poor aging resistance, and poor anti-powdering performance.
聚氨酯树脂应用广泛，性能优异。它作为钢结构、木器等基材的表面涂料使用时，所形成的涂膜机械性能好、耐磨性好、硬度高、耐水、耐化学、耐老化性优异，属于高性能涂料，其应用领域包括地面涂料、厨房家具涂料、办公家具涂料，机械设备(OEM)涂料。它对各种基材的附着力都很强，不仅对木材、水泥基等多孔型基材，对金属、玻璃等多孔性的表面附着力也很强。Polyurethane resins are widely used and have excellent performance. When it is used as a surface coating for steel structures, wood and other substrates, the coating film formed has good mechanical properties, good wear resistance, high hardness, water resistance, chemical resistance, and excellent aging resistance. It belongs to high-performance coatings. Its application field Including floor coatings, kitchen furniture coatings, office furniture coatings, mechanical equipment (OEM) coatings. It has strong adhesion to various substrates, not only to porous substrates such as wood and cement, but also to porous surfaces such as metal and glass.
针对水性环氧涂料出现的一些不足，国内外近几年对涂料用环氧树脂进行各种改性，其中聚氨酯改性环氧所得钢结构防腐涂料，不仅仅克服了水性环氧防腐涂料本身的一些缺陷，使得所制涂料同时具备聚氨酯和环氧的优点，从而提高了涂料的综合性能，以它为基料制备的水性环氧防腐蚀涂料在桥梁、管道、集装箱、工业厂房和公共设施等钢铁结构领域有着巨大的发展前景。In view of some shortcomings of waterborne epoxy coatings, various modifications have been made to epoxy resins for coatings at home and abroad in recent years. Among them, the steel structure anticorrosive coatings obtained from polyurethane modified epoxy not only overcome the shortcomings of waterborne epoxy anticorrosive coatings themselves. Some defects make the coating have the advantages of polyurethane and epoxy at the same time, thereby improving the comprehensive performance of the coating. The water-based epoxy anti-corrosion coating prepared with it as the base material is used in bridges, pipelines, containers, industrial plants and public facilities, etc. The field of steel structures has great development prospects.
发明内容Contents of the invention
本发明的目的在于提供一种水性聚氨酯改性环氧钢结构防腐涂料的制备方法。The object of the present invention is to provide a kind of preparation method of waterborne polyurethane modified epoxy steel structure anticorrosion paint.
本发明提出的水性聚氨酯改性环氧钢结构防腐涂料，其组份按重量份组成为：The water-based polyurethane modified epoxy steel structure anticorrosion paint that the present invention proposes, its component is made up of by weight:
其中：A组分和B组分总重量满足100％。Wherein: the total weight of component A and component B satisfies 100%.
本发明中，所述消泡剂是一种改性聚硅氧烷类聚合物，如Defom W-0505或DefomW-092。In the present invention, the defoamer is a modified polysiloxane polymer, such as Defom W-0505 or Defom W-092.
本发明中，所述分散剂为高分子量的改性聚丙烯酸酯类聚合物和羧酸类烷醇胺盐复配，如AFCONA-4560或者AFCONA-4550和AFCONA-5071复配。In the present invention, the dispersant is a compound of high molecular weight modified polyacrylate polymer and carboxylic acid alkanolamine salt, such as AFCONA-4560 or AFCONA-4550 and AFCONA-5071.
本发明中，所述流平剂为聚醚改性聚二甲基硅氧烷溶液，如BYK346。In the present invention, the leveling agent is polyether modified polydimethylsiloxane solution, such as BYK346.
本发明中，所述防锈颜料为氧化铁红与三聚磷酸铝复配。In the present invention, the antirust pigment is compounded of iron oxide red and aluminum tripolyphosphate.
本发明中，所述抗闪锈剂为烷基磷酸盐，如RAYBO 60。In the present invention, the anti-flash rust agent is an alkyl phosphate, such as RAYBO 60.
本发明中，所述固化剂为非离子型环氧改性多元胺分散体，由PEG和E-51环氧树脂的嵌段共聚物改性经过部分封端多元胺的所得。而改多元胺为三乙烯四胺(TETA)，封端比例在0.5-1范围之内。In the present invention, the curing agent is a non-ionic epoxy-modified polyamine dispersion obtained by modifying a block copolymer of PEG and E-51 epoxy resin and partially blocking the polyamine. The polyamine is changed to triethylenetetramine (TETA), and the capping ratio is within the range of 0.5-1.
本发明提出的水性聚氨酯改性环氧钢结构防腐涂料的制备方法，具体步骤如下：The preparation method of the waterborne polyurethane modified epoxy steel structure anticorrosion coating that the present invention proposes, concrete steps are as follows:
1、A组分制备：在1000-1500r/min搅拌下，依次将防锈颜料、沉淀硫酸钡、滑石粉、抗闪锈剂、分散剂和水混合加入到水性聚氨酯改性环氧乳液中，并加入一半消泡剂，将颜料分散至50目以下，然后在300r/min-500r/min搅拌速率下，加入另一半消泡剂和流平剂。搅拌均匀，熟化，过滤后得到A组分；1. Preparation of component A: under stirring at 1000-1500r/min, mix anti-rust pigment, precipitated barium sulfate, talcum powder, anti-flash rust agent, dispersant and water into the water-based polyurethane modified epoxy emulsion in sequence, And add half of the defoamer to disperse the pigment to below 50 mesh, and then add the other half of the defoamer and leveling agent at a stirring speed of 300r/min-500r/min. Stir evenly, ripen, and obtain component A after filtering;
2、B组份是通过对多按进行封端、加成后用反应型乳化剂乳化后制备而成的一种水性分散体。对多元胺进行改性，不仅增加了与环氧树脂的相容性，降低了胺的活性，延长了涂料的适用期。2. Component B is a water-based dispersion prepared by capping polyhydric acid and emulsifying it with a reactive emulsifier after addition. The modification of polyamine not only increases the compatibility with epoxy resin, but also reduces the activity of amine and prolongs the pot life of coating.
3、将A、B两组份按照质量比10∶1的比例混合，在搅拌器中混合均匀，得到水性聚氨酯改性环氧钢结构防腐涂料。3. Mix the two components of A and B according to the mass ratio of 10:1, and mix them evenly in the mixer to obtain the water-based polyurethane modified epoxy steel structure anticorrosion coating.
所得涂料的性能如下：The properties of the resulting coating are as follows:
测试项目 测试结果Test Items Test Results
干燥 表干/min 35dry surface dry/min 35
时间 实干/h ≤12Time hard work/h ≤12
抗冲击性/kg·cm ＞50Impact resistance/kg·cm ＞50
附着力/级 1Adhesion/Grade 1
柔韧性/Φmm ≤2Flexibility/Φmm ≤2
铅笔硬度/H 3Pencil Hardness/H 3
耐盐水(3％NaCl) 400h无异常Salt water resistance (3% NaCl) 400h no abnormality
耐中性雾(5％NaCl) 600h，少量黑斑，划痕渗透＜＜3mmResistance to neutral fog (5% NaCl) 600h, a small amount of black spots, scratch penetration <<3mm
本发明研制的水性聚氨酯改性环氧钢结构防腐涂料，既保持了环氧类涂料耐酸碱，附着力优良的性能，又具有聚氨酯类涂料耐油类，耐化学介质，涂膜强度和耐磨性能好的特点，同时其以水作为分散介质，价格低廉、无气味、不燃，贮存、运输和使用过程中的安全性大大提高，而且水性环氧涂料的应用性能好，施工工具可用水直接清洗。The water-based polyurethane modified epoxy steel structure anticorrosion coating developed by the present invention not only maintains the acid and alkali resistance and excellent adhesion performance of epoxy coatings, but also has the properties of polyurethane coatings such as oil resistance, chemical medium resistance, coating film strength and wear resistance. Good performance, at the same time, it uses water as the dispersion medium, which is cheap, odorless, non-flammable, greatly improves the safety during storage, transportation and use, and the application performance of water-based epoxy coating is good, and the construction tools can be washed directly with water .
具体实施方式Detailed ways
下面通过实施例进一步说明本发明。The present invention is further illustrated below by way of examples.
实施例1：Example 1:
按重量单位称取下列原料：水性聚氨酯改性环氧乳液25；沉淀硫酸钡10；防锈颜料22；滑石粉8；消泡剂1；分散剂2.5；流平剂0.5；抗闪锈剂2，水18。流平剂采用BYK346，分散剂采用AFCONA-4560，抗闪锈剂采用raybo75，消泡剂采用Defom W-0505。Take the following raw materials by weight unit: water-based polyurethane modified epoxy emulsion 25; precipitated barium sulfate 10; antirust pigment 22; talc powder 8; defoamer 1; dispersant 2.5; , water 18. The leveling agent is BYK346, the dispersant is AFCONA-4560, the anti-flash rust agent is raybo75, and the defoamer is Defom W-0505.
在高速搅拌下，依次将锌粉、防锈颜料、滑石粉、抗闪锈剂、分散剂和水混合加入到水性聚氨酯改性环氧乳液中并加入一半消泡剂，将颜料分散至50目以下，然后在300r/min-500r/min搅拌速率下，加入另一半消泡剂和流平剂等助剂。搅拌均匀，过滤后得到A组分。Under high-speed stirring, sequentially mix zinc powder, anti-rust pigment, talcum powder, anti-flash rust agent, dispersant and water into the water-based polyurethane modified epoxy emulsion and add half of the defoamer to disperse the pigment to 50 mesh Next, at a stirring rate of 300r/min-500r/min, add the other half of defoamer and leveling agent and other additives. Stir evenly, and obtain A component after filtration.
对多按进行封端、加成后用反应型乳化剂乳化后制备一种水性分散体，取该分散体7g与4g水混合配成B组。A water-based dispersion was prepared after capping and addition of polyacrylamide and emulsifying with a reactive emulsifier. Mix 7 g of the dispersion with 4 g of water to form group B.
然后把A、B两组份搅拌均匀，熟化15分钟，即得到可直接施工的水性聚氨酯改性环氧钢结构防腐涂料，把该涂料刷涂或者喷涂在马口铁片上，45分钟可以得到表干的涂膜，干燥一周涂膜可以完全固化，测试涂膜性能：Then mix the two components A and B evenly, and ripen for 15 minutes to obtain a water-based polyurethane modified epoxy steel structure anti-corrosion coating that can be directly applied. Brush or spray the coating on the tinplate sheet, and you can get a surface-dried coating in 45 minutes. Coating film, dry for a week and the coating film can be completely cured, test the performance of the coating film:
测试项目 测试结果Test Items Test Results
干燥 表干/min 35dry surface dry/min 35
时间 实干/h ≤12Time hard work/h ≤12
抗冲击性/kg·cm 50Impact resistance/kg·cm 50
附着力/级 2Adhesion/Grade 2
柔韧性/Φmm ≤2Flexibility/Φmm ≤2
铅笔硬度/H 4Pencil Hardness/H 4
耐盐水(3％NaCl) 400h无异常Salt water resistance (3% NaCl) 400h no abnormality
耐中性雾(5％NaCl) 600h，少量黑斑，划痕处渗透＜＜2mmResistance to neutral fog (5% NaCl) 600h, a small amount of black spots, penetration of scratches <<2mm
实施例2：Example 2:
按重量单位称取下列原料：水性聚氨酯改性环氧乳液35；沉淀硫酸钡7；防锈颜料16；滑石粉4；消泡剂0.3；分散剂1.5；流平剂0.2；抗闪锈剂1；水15。流平剂采用BYK346，分散剂采用AFCONA-4550和AFCONA-5071，抗闪锈剂采用raybo75，消泡剂采用DefomW-092。Weigh the following raw materials by weight unit: water-based polyurethane modified epoxy emulsion 35; precipitated barium sulfate 7; antirust pigment 16; talcum powder 4; defoamer 0.3; dispersant 1.5; ; water 15. The leveling agent is BYK346, the dispersant is AFCONA-4550 and AFCONA-5071, the anti-flash rust agent is raybo75, and the defoamer is DefomW-092.
在高速搅拌下，依次将沉淀硫酸钡、防锈颜料、滑石粉、抗闪锈剂、分散剂和水混合加入到水性聚氨酯改性环氧乳液中并加入一半消泡剂，将颜料分散至50目以下，然后在300r/min-500r/min搅拌速率下，加入另一半消泡剂和流平剂等助剂。搅拌均匀，过滤后得到A组分。Under high-speed stirring, sequentially mix precipitated barium sulfate, anti-rust pigment, talc powder, anti-flash rust agent, dispersant and water into the water-based polyurethane modified epoxy emulsion and add half of the defoamer to disperse the pigment to 50 Under the mesh, then add the other half of defoamer and leveling agent and other additives at a stirring speed of 300r/min-500r/min. Stir evenly, and obtain A component after filtration.
对多按进行封端、加成后用反应型乳化剂乳化后制备一种水性分散体，取该分散体10g与10水混合配成B组份。After capping and addition, emulsify with a reactive emulsifier to prepare a water-based dispersion. Mix 10 g of the dispersion with 10 water to form component B.
然后把A、B两组份搅拌均匀，熟化15分钟，即得到可直接施工的水性聚氨酯改性环氧钢结构防腐涂料，把该涂料刷涂或者喷涂在马口铁片上，45分钟可以得到表干的涂膜，干燥一周涂膜可以完全固化，测试涂膜性能：Then mix the two components A and B evenly, and ripen for 15 minutes to obtain a water-based polyurethane modified epoxy steel structure anti-corrosion coating that can be directly applied. Brush or spray the coating on the tinplate sheet, and you can get a surface-dried coating in 45 minutes. Coating film, dry for a week and the coating film can be completely cured, test the performance of the coating film:
测试项目 测试结果Test Items Test Results
干燥 表干/mmin 40dry surface dry/mmin 40
时间 实干/min ≤12Time hard work/min ≤12
抗冲击性/kg·cm 60Impact resistance/kg·cm 60
附着力/级 1Adhesion/Grade 1
柔韧性/Φmm ≤2Flexibility/Φmm ≤2
铅笔硬度/H 3Pencil Hardness/H 3
耐盐水(3％NaCl) 400h无异常Salt water resistance (3% NaCl) 400h no abnormality
耐中性雾(5％NaCl) 600h，少量黑斑，划痕处基本无渗透Resistance to neutral fog (5% NaCl) 600h, a small amount of black spots, basically no penetration at scratches
实施例3：Example 3:
按重量单位称取下列原料：水性聚氨酯改性环氧乳液45；沉淀硫酸钡6；防锈颜料12；滑石粉4；消泡剂0.3；分散剂1.5；流平剂0.2；抗闪锈剂1；水10。流平剂采用BYK346，分散剂采用AFCONA-4550和AFCONA-5071，抗闪锈剂采用raybo75，消泡剂采用DefomW-092。Weigh the following raw materials by weight unit: water-based polyurethane modified epoxy emulsion 45; precipitated barium sulfate 6; antirust pigment 12; talcum powder 4; defoamer 0.3; dispersant 1.5; ; water 10. The leveling agent is BYK346, the dispersant is AFCONA-4550 and AFCONA-5071, the anti-flash rust agent is raybo75, and the defoamer is DefomW-092.
在高速搅拌下，依次将沉淀硫酸钡、防锈颜料、滑石粉、抗闪锈剂、分散剂和水混合加入到水性聚氨酯改性环氧乳液中并加入一半消泡剂，将颜料分散至100目以下，然后在300r/min-500r/min搅拌速率下，加入另一半消泡剂和流平剂等助剂。搅拌均匀，过滤后得到A组分。Under high-speed stirring, sequentially mix precipitated barium sulfate, anti-rust pigment, talc powder, anti-flash rust agent, dispersant and water into the water-based polyurethane modified epoxy emulsion and add half of the defoamer to disperse the pigment to 100 Under the mesh, then add the other half of defoamer and leveling agent and other additives at a stirring speed of 300r/min-500r/min. Stir evenly, and obtain A component after filtration.
对多按进行封端、加成后用反应型乳化剂乳化后制备一种水性分散体，取该分散体13g与7g水混合配成B组。A water-based dispersion was prepared after capping and addition of polyacrylamide and emulsifying with a reactive emulsifier. Mix 13g of the dispersion with 7g of water to form group B.
然后把A、B两组份混合搅拌均匀，熟化15分钟，即得到可直接施工的水性聚氨酯改性环氧钢结构防腐涂料，把该涂料刷涂或者喷涂在马口铁片上，45分钟可以得到表干的涂膜，干燥一周涂膜可以完全固化，测试涂膜性能：Then mix and stir the two components A and B evenly, and ripen for 15 minutes to obtain a water-based polyurethane modified epoxy steel structure anti-corrosion coating that can be directly applied. Brush or spray the coating on the tinplate sheet, and you can get a surface dry coating in 45 minutes. The coating film can be completely cured after drying for a week, and the performance of the coating film is tested:
测试项目 测试结果Test Items Test Results
干燥 表干/min 35dry surface dry/min 35
时间 实干/min ≤12Time hard work/min ≤12
抗冲击性/kg·cm 60Impact resistance/kg·cm 60
附着力/级 1Adhesion/Grade 1
柔韧性/Φmm ≤2Flexibility/Φmm ≤2
铅笔硬度/H 2Pencil Hardness/H 2
耐盐水(3％NaCl) 400h无异常Salt water resistance (3% NaCl) 400h no abnormality
耐中性雾(5％NaCl) 600h，少量黑斑，划痕渗透＜＜2mmResistance to neutral fog (5% NaCl) 600h, a small amount of black spots, scratch penetration <<2mm
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