水性聚氨酯涂料耐水改性的研究进展

水性聚氯酯涂料的问世,适应了目前化工环保化的趋势。然而水性聚氯酯涂料在耐水、耐溶剂、耐候等方面表现较差。介绍了目前国内外水性聚氯酯涂料的研究现状及改性方法：交联改性,环氧树脂改性,有机硅改性,有机氟改性,多重改性等。最后指出了水性聚氨酯涂料的发展趋势。     

丙烯酸树脂及其涂料

防污性能优异的丙烯酸水性涂料组合物;具有优异抗龟裂性、耐磨性和附着力的环保型丙烯酸防滑涂料组合物;水性丙烯酸酯-聚氯酯涂料;     

中国聚氨酯工业协会涂料专业委员会组织机构及会员登记

中国聚氯酯工业协会涂料专业委员会（简称PU涂料专委会）成立于1986年，是在中国聚氯酯工业协会领导下的全国聚氯酯涂料行业的企业、事业单位自愿组成的社会团体，是跨地区、跨部门、跨所有制，不以赢利为目的的全国行业组织。秘书处设在中海油常州涂料化工研究院。     

涂料用含氟聚合物乳液的合成与性能

含氟聚合物乳液因具有优异的表面特性、耐候性和环境友好性,在高耐候涂料和特殊性能涂料领域获得广泛的应用。本文综述了含氟聚合物乳液的制备用单体、乳化剂及制备方法。论述了含氟聚合物乳液涂料的结构与性能的关系,指出了含氟聚合物乳液的研究工作的重点。     

环境友好含氟乳液功能型氟树脂涂料的研究及应用

氟树脂由于其特殊的结构特点比其他传统的树脂表现出优良的耐候性和耐久性,含氟聚合物涂料优异的力学性能、耐候性、抗污性、耐化学品性等使其获得越来越广泛的应用。本文介绍了氟树脂及相关涂料的研究进展及其应用,强调溶剂型氟树脂涂料功能特点与含氟乳液涂料的环境友好性,特别指出,当今涂料的发展应朝着环境友好、高性能和多功能的方向发展。     

含氟聚合物及其涂料

导电辊用含氟聚合物涂料组合物及导电辊,提高了耐化学性、耐油性、耐水性和耐磨损性的基于可水解全氟聚醚异氰酸酯改性硅烷的涂料,包括氟化聚醚硅烷部分缩合物的涂料组合物及其应用,含氟树脂涂料的研究进展,     

首届水性聚氨酯培训班回顾

1 概况 在我国聚氯酯工业“十一五”规划中，以水为介质的聚氯酯涂料和胶粘剂已经被列为重点发展项目，据最新的统计数据显示，今年1—10月份涂料产量已超过7338万t，涂料产量的逆势上扬，一方面说明了行业的需求在不断扩大，另一方面也说明技术对行业发展的重要性，竞争越激烈，越需要技术支持。因此在市场和技术的双重推动下，水性聚氨酯必将获得巨大的发展。为了加强水性聚氨酯人才培养，推动水性聚氯酯的应用步伐，由中国聚氯酯工业协会水性聚氨酯专业委员会和《涂料工业》杂志社主办，     

防水涂料

水性双组分聚氯酯防水涂料的生产方法;高性能环保型聚氯酯防水涂料及其制备工艺;环保利废高性能双组分水性聚氯酯防水及装饰涂料.     

含氟聚氨酯树脂涂料的制备及应用

本文介绍了可溶性的带痉基含氟烯烃的合成及含氟聚氨酯涂料的制备，含氟聚氨酯涂料具有优异的耐候性，保色性及耐热，耐腐蚀，耐化学性，可用于建筑，储罐，船舶和飞机等领域。     

结构明确含氟嵌段共聚物的设计合成及其在涂料中的应用新进展

含氟嵌段共聚物不仅具有含氟聚合物的耐候性、耐化学药品性、耐沾污性、低表面能等特性,而且表现出独特的两亲性,因此,近年来引起了国内外学术界和工业界越来越多的关注。本文首先对利用可控/活性自由基聚合法设计合成的结构明确的含氟嵌段共聚物进行了总结和评述,然后介绍了结构明确含氟嵌段共聚物的性能及其在涂料中的应用,最后对含氟嵌段共聚物在涂料领域的发展进行了展望。     

Compositional effects on the fouling resistance of fluorourethane coatings

Conclusions  A series of fluorinated polyurethane polymers have been prepared and characterized. Immersion experiments have been performed to determine the fouling-release effectiveness of the coatings. The surface energies of the films are between 12 mJ m⁻² to 33 mJ m⁻² and are controlled by the fluorine content of the polymer. These surface energies are well below the values shown by conventional alkyd, epoxy, vinyl, polyester, and polyurethane coatings (39 mJ m⁻² and 50 mJ m⁻²). Surface energy is not the dominant factor in determining the fouling- release behaviour of these coatings. Instead, measurements of the coating modulus, hardness, and glass transition temperature indicate that supple, soft polymers, with a high degree of mobility may display more effective fouling-release characteristics than more rigid, harder polymers below their glass transition temperatures. Surface roughness also appears to be a major factor in determining coating fouling-release behaviour. This work has demonstrated that marine organisms bind to fluorinated polyurethanes with significantly less strength than to the unfluorinated epoxy, vinyl and urethane resins which are now used with toxicants in marine coatings. However, this work has shown that these fluorinated polyurethanes are not sufficiently promising to merit further attention as non-toxic anti-fouling coatings for ship hulls. Fluorinated polyurethanes remain very attractive coatings for exterior and anti-corrosive service, especially in application requiring easy cleanability and resistance to sunlight, weather, and chemicals.     

含全氟聚醚聚氨酯丙烯酸酯的合成及性能研究

以异佛尔酮二异氰酸酯（ IPDI）、全氟聚醚醇（ Fluorolink E10H）、甲基丙烯酸羟乙酯（HEMA）以及聚乙二醇（ PEG）、聚四氢呋喃二醇（PTMG）、聚碳酸酯二醇（ PCDL）为原料合成 3种含氟聚氨酯丙烯酸酯（ FUA）,并作为低聚物添加到 UV固化涂料体系中。分别对 UV固化涂层的接触角、吸水率、耐摩擦性、形貌及表面组成等性能进行了研究。结果表明：以 PCDL为原料、低聚物用量为 2. 4%时具有良好的表面性能,水和正十六烷的接触角分别达到 114. 7°和 69. 7°,负载为 500 g、以无纺布为摩擦媒介摩擦 1 000次后水接触角为 107. 8°,涂层具有良好的耐摩擦性能。     

含氟聚氨酯树脂的制备及性能研究

制备了具有优异拒水、拒油和易去污功能的含氟聚氨酯树脂。方法:通过自制的含氟烷基侧链的含氟二元醇扩链剂(PFDOL)、聚四氢呋喃(PTMEG)、二羟甲基丙酸(DMPA)和二苯基甲烷二异氰酸酯(MD I)等原料,采用两步法制备了含氟聚氨酯树脂。结果:采用傅里叶变换衰减全反射红外光谱(ATR-FTIR)和核磁共振氢谱(1H-NMR)表征了产物的结构。经产物处理后的棉布和皮革对水的静态接触角可以分别达到145°和128°。处理后皮革的拒水性可达10级,拒油性可达8级。同时研究了PFDOL和DMPA含量对产品拒水、拒油和易去污性能的影响,发现DMPA含量为9.73%时,样品仍具有优异的拒水、拒油性能,为制备阴离子型水性含氟聚氨酯提供了基础;DMPA含量为7.2%,F含量为19.2%时,样品具有较好的易去污性能。制备的含氟聚氨酯树脂可应用于纺织品的拒水、柜油整理和易去污整理,具备工业化生产的可能。     

蓖麻油改性的水性聚氨酯涂料的制备及其防蚀性能

以可再生的蓖麻油和环氧树脂改性水性聚氨酯,研究了涂膜的耐水性能等,改性后的水性聚氨酯吸水率下降仅为3%,耐水性好。对该树脂所制成的富锌防腐涂料进行了腐蚀电位和电化学阻抗谱(EIS)的测试分析,考察了富锌涂层在3%NaCl溶液中的电化学行为,结果表明耐水性的提高导致蓖麻油改性的水性聚氨酯富锌涂料耐蚀性的改进。     

Preparation,characterisation and properties of waterborne fluorinated polyurethane acrylate/SiO2 hybrid

Abstract

Waterborne fluorinated polyurethan acrylate dispersion was prepared from the polyether polyol, isophorone diisocyanate, dimethylpropionic acid, hexafluorobutyl acrylate and trimethylolpropane triacrylate as monomers. Then, the prepolymer containing alkoxysilane Si(OR)₃ was synthesised from dispersion and coupling agent methacryloxypropyl trimethoxy silane. The Si(OR)₃ group was hydrolysed and reacted with different content tetraethoxysilane hydrolysis solutions in via hybridisation and gelatinous. A series of waterborne fluorinated polyurethane acrylate/SiO₂ hybrids were prepared by sol–gel technique. The physical properties of dispersion such as storage stability, viscosity, particle size and surface tension were measured. The results indicated that all the prepared dispersions showed acceptable storage stability. The mechanical properties such as tensile strength, elongation at break and hardness and chemical resistance such as water absorption and acid resistance of the films were investigated. The hybrid materials were characterised using Fourier transform infrared, SEM and X-ray diffraction. The obtained hybrid materials have great potential application such as coatings, adhesion, leather finishing, adhesives, sealants, plastic coatings and wood finishes.     

锌粉和有机硅对聚氨酯涂层耐蚀性和热性能的影响

通过浸泡腐蚀和高温烘烤,以涂层的冲击强度为依据,研究了不同锌粉含量的聚氨酯涂层在10%(质量分数,下同)HCl、10%NaOH和20%NaCl溶液中的耐腐蚀性以及不同有机硅添加量的涂层在120℃下的耐热性.通过热重分析(TG-DSC),比较了改性前后聚氨酯涂料的热稳定性,测试了涂层的综合性能.结果表明,含锌量为83%的...     

Coatings prepared from waterborne polyurethane dispersions obtained with polycarbonates of 1,6-hexanediol of different molecular weights

Waterborne polyurethane dispersions (PUDs) were synthesized with polycarbonates of 1,6-hexanediol of different molecular weight (500–3000 Da) and their properties, adhesion (Hatch adhesion) and coatings on stainless steel properties (Pencil hardness, Persoz hardness, gloss at 60°, chemical resistance, yellowness index) were characterized. The hatch adhesion of the polyurethane coatings to stainless steel was very good and decreased slightly by increasing the molecular weight of the polycarbonate of 1,6-hexanediol. Both the Pencil and Persoz hardness values of the coatings increased by increasing the hard segments content in the polyurethane, i.e. by decreasing the molecular weight of the polycarbonate of 1,6-hexanediol, whereas the gloss and the yellowness index were lower for the coatings obtained with the polycarbonate of 1,6-hexanediol of molecular weight of 500 Da. Very good chemical resistance against ethanol for all polyurethane coatings on stainless steel plates was obtained but for long time of ethanol in contact with the coating surface the chemical resistance decreased, more markedly for the polyurethane coating obtained with the polycarbonate of 1,6-hexanediol of higher molecular weight. In summary, the segmented structure of the waterborne polyurethane dispersion determined the properties of the polyurethane coatings obtained from them.     

磷酸锌中重金属对双组分聚氨酯防腐涂料性能的影响

以不同重金属含量的磷酸锌为原料制备双组分聚氨酯防腐涂料,运用傅里叶变换红外光谱仪（FTIR）研究了重金属对双组分聚氨酯防腐涂料固化速率的影响,利用盐雾性能研究了重金属含量对双组分聚氨酯涂料防腐性能的影响。结果表明,磷酸锌中的重金属含量越高,其制备的聚氨酯涂料固化速度越快,耐盐雾性能越差,耐冲击性能越差。     

Properties of clear polyurethane films modified with a fluoropolymer emulsion

An emulsion of a fluoroethylene vinyl ether polyol, Lumiflon FE-4400, was incorporated into clearcoats of two-part water-based military polyurethane topcoats. This additive was mixed with the aqueous dispersion polyol component. The polyol component was then mixed with the isocyanate component with a high speed disperser to properly mix the reactants. Films were prepared by drawing down the dispersion onto glass substrates using a 4-mil stainless steel Bird applicator. After drying at ambient conditions the films were removed from the glass for analysis. As measured using X-ray photoelectron spectroscopy, Lumiflon FE-4400 segregated to the surface providing significant fluorine enrichment at the air interface, as high as 90 times the bulk concentration. Although increasing the concentration of Lumiflon FE-4400 increased the surface concentration, the ratio of surface concentration to the bulk concentration decreased. As expected, water contact angle increased approximately in a linear fashion with the surface fluorine concentration. At 1–5 wt% added Lumiflon FE-4400, the physical and mechanical properties were not significantly affected. However, addition of Lumiflon FE-4400 at or above 10% of polyol fraction significantly reduced the glass transition temperature, modulus, crosslink density, strength, toughness and weathering resistance. Phase contrast microscopy showed that the morphology of these films went from being uniform to having distinct aggregates that increased in size and number as fluorinated polyol fraction increased, likely explaining the reduction in film properties. Accelerated weathering of pigmented coatings was also performed. Although fluorinated resins typically improve weathering resistance of coatings, in this study, increasing the Lumiflon FE-4400 content decreased the weathering resistance as a result of the ethoxylation of the fluorinated additive necessary to produce an aqueous fluoropolymer emulsion.