纳米SiO_2/聚氨酯丙烯酸酯预聚物的制备和性能研究

利用纳米SiO2表面Si—OH和异氰酸酯化合物反应的特点,将其与异佛尔酮二异氰酸酯(IPDI)、聚丙二醇(PPG)和丙烯酸羟乙酯(HEA)进行原位聚合制备纳米SiO2/聚氨酯丙烯酸酯预聚物。将该预聚物应用于光固化涂料,并对涂料的光敏性能、黏度及其固化膜的耐热性能、硬度和耐磨性能进行了研究。结果表明:纳米SiO2在紫外光固化涂料中团聚现象少,分散性能好。采用纳米SiO2/聚氨酯丙烯酸酯预聚物,所制涂料固化膜的初始热分解温度提高,硬度和耐磨性能均有显著改善,但涂料的透明性和光固化速率降低,黏度增大。     

含氟光固化单体的研究进展

紫外光固化技术在光固化涂料、粘合剂、和油墨印刷等领域应用广泛。含氟聚合物表面能低,疏水疏油,具有优良的耐候性,耐化学品性和抗污染性,这些优异性能吸引人们研究其在光固化领域的应用。本文综述了含氟光固化单体的种类,具体包括丙烯酸酯类、环氧类、聚氨酯类、全氟乙烯基醚类、超支链低聚物和混合光固化体系类。并对其合成方法和优缺点进行了分析讨论。     

光固化聚氨酯丙烯酸酯涂料的合成及其性能研究

采用异佛尔酮二异氰酸酯(1PDl)制备了可光固化的聚氨酯丙烯酸酯预聚体,研究了制备过程的条件,选择了活性稀释单体配制成涂膜固化,对其一些物理性能进行了测试研究。结果表明,和常用的2,4-甲苯二异氰酸酯(TDl)制备的可光固化的聚氨酯丙烯酸酯预聚体相比,该预聚体具有更加优良的力学性能和抗老化性能。     

UV-光固化光纤涂料的研制

本文采用环氧丙烯酸酯与聚氨酯丙烯酸酯共混聚合的方法制备出新型的UV．光固化光纤涂料,其主要性能较好．研究了基体组成、引发剂、稀释剂以及固化工艺对UV-固化光纤涂料的光固化速度的影响．通过实验发现,环氧丙烯酸酯与聚氨酯丙烯酸酯的配比为4：6～6：4、稀释剂的含量不大于20％时固化速度较快、性能较好,同时固化时灯距与固化膜厚度对固化速度的影响较大．     

UV固化低聚物及其涂料研究进展

综述了UV固化低聚物(主要是环氧丙烯酸酯和聚氨酯丙烯酸酯)的研究进展。环氧丙烯酸酯研究进展包括:降低黏度、改善柔韧性、光敏活性、耐热性、耐磨性和阻燃性能;聚氨酯丙烯酸酯的研究进展包括:紫外光固化的聚氨酯丙烯酸酯预聚物合成方法;聚氨酯丙烯酸酯/无机纳米复合材料;光固化无机/有机杂化材料;水性UV固化聚氨酯丙烯酸酯和UV固化超支化聚氨酯丙烯酸酯。较为详细地论述了氧阻聚的3种作用机理及解决方法(物理和化学2种方法),最后对光固化技术的5大发展趋势进行了展望。     

导读

<正>近年来,由于环保法规的日益严格,水性聚氨酯树脂得到了较快的发展本期针对"水性聚氨酯"的研制进行了重点报道,纪凤龙等的"非离子改性可水分散多异氰酸酯的制备与性能",采用聚乙二醇单甲醚(MPEG)对脂肪族多异氛酸酯进行亲水改性,研究了MPEG的相对分子质量、用量和合成工艺对可水分散多异氰酸酯固化剂的异镢酸酯基团含量、黏度、水分散性及其对双组分水性聚氨酯涂料性能的影响岳鑫等的"紫外光固化水性聚氨酯丙烯酸酯树脂的合成及性能研究",结合水性技术和紫外光固化技术,在聚氨酯预聚体末端引入季戊四醇三丙烯酸酯,合成了紫外光固化的水性聚氨酯丙烯酸酯树脂,提高了涂膜的交联密度,改善了涂膜的耐水性和机械强度等性能     

紫外光固化丙烯酸化聚氨酯的合成及其性能的研究

<正>光固化涂料由于它具有耗能低、无污染、固化速度快等优点,自六十年代以来发展非常迅速.光固化涂料一般由含有活性官能团的预聚物、活性稀释剂、光引发剂等组成.其中预聚物性能对涂层性能起主要作用.丙烯酸化聚氨酯兼有聚氨酯高的耐磨性、柔韧性、撕裂强度和丙烯酸酯的卓越的光学性能和耐候性,因而在近期得到了较多的研究.     

UV固化含氟聚氨酯丙烯酸酯的合成及其热稳定性研究

氟碳树脂具有优异的热稳定性,可以改善聚氨酯的耐热性,文章以异佛尔酮二异氰酸酯(IPDI)、聚丙二醇1000(PPG1000)、1,4-丁二醇、含氟丙烯酸酯共聚物二醇和甲基丙烯酸羟乙酯(HEMA)为主要原料合成可UV固化含氟聚氨酯丙烯酸酯预聚体。研究了含氟丙烯酸酯共聚物以及双键单体种类对聚氨酯涂膜热稳定性的影响。结果表明,将含氟丙烯酸酯共聚物引入聚氨酯中,可以显著的提高其热稳定性,同时,降低了聚氨酯硬段与软段的微相分离程度。     

2006年中国聚氨酯论文文摘（十一）

高性能氟化聚氨酯弹性树脂;高性能浇注型聚氨酯弹性体的动态性能研究;革用水性聚氨酯的研究;隔板复合模设计;工业生产中聚氨酯预聚物NCO含量测定方法的改进;功能泡沫塑料的研制及对铜镍吸附分离研究;骨水泥自固化修饰聚氨酯多孔支架;固化参数对丁羟基聚氨酯水声材料性能的影响;固体光气法合成1,6-己二异氰酸酯;关注非异氰酸酯聚氨酯（NIPU）涂料的应用和发展;光固化聚氨酯丙烯酸酯涂料的合成及其性能研究。     

紫外光固化改性水性聚氨酯树脂的合成与性能研究

以聚乙二醇、甲苯二异氰酸酯、二羟甲基丙酸、丙烯酸-2-羟基乙酯为原料合成了一组紫外光固化水性聚氨酯丙烯酸酯树脂(PUA),考察了不同条件对合成反应的影响,研究改性聚氨酯涂层的光固化性能。结果表明:合成的改性聚氨酯树脂可作为水性紫外光固化涂料,光引发剂用量为3%、活性稀释剂TMPTA30%时光固化效果好。     

Synthesis of bis[(4-hydroxyethoxy)phenyl]sulfone containing urethane acrylates and their applications

UV-curing processes are used in industrial applications because of their advantages such as high speed applications and solvent-free formulations at ambient temperature. UV-curable sulfone containing polyurethane acrylates were synthesized from bis[(4-hydroxyethoxy)phenyl]sulfone (BHEPS), polyols, isophorone diisocyanate (IPDI) and 2-hydroxyethyl methacrylate (HEMA). The polyurethane acrylates characterized with ¹H NMR and FT-IR spectroscopies. The UV-cured coatings and films were formulated with polyurethane acrylates, reactive diluents such as dipropyleneglycol diacrylate (DPGDA), 1,6-hexanediol diacrylate (HDDA) and photoinitiator. The water wettability of the UV-cured films was investigated by measuring contact angle. Sulfone containing polyurethane acrylates increase mechanical properties such as pendulum hardness, pencil hardness, tensile strength, and e-modulus values. These mechanical properties and chemical-solvent resistance may have been strongly dependant on the sulfone content and crosslinking density.     

光敏性含磷丙烯酸酯的合成和性能研究

将三氯氧磷分别与乙二醇及一缩乙二醇反应合成了2种双磷酸酯酰氯,将其再进一步与丙烯酸羟乙酯反应,制备了2种四官能度的UV固化含磷丙烯酸酯,通过1H-NMR和FT-IR对最终产物结构进行了表征。研究了中间反应物配比对产物收率的影响,2种含磷丙烯酸酯对UV固化体系中C==C双键转化率的影响,固化膜的热稳定性和UV固化体系的物理力学性能。结果表明:双磷酸酯酰氯与丙烯酸羟乙酯物质的量比为1:3.94～3.97时,产物收率98.9%。2种含磷丙烯酸酯25℃下黏度较低(280mPa.s),固化膜800℃残炭率较高(5.5%),附着力1级,硬度5H,剪切强度12.7MPa,是优良的紫外光固化促进剂。     

氨基硅油微乳液改性水性聚氨酯的合成和性能

合成了水性聚氨酯乳液和氨基硅油(AEAPS)微乳液改性水性聚氨酯乳液,研究了两种水性聚氨酯的性能及在织物上的涂层效果。结果表明,当氨基硅油相对于聚丙二醇的质量百分比为8.18%时,有机硅改性水性聚氨酯乳液的离心稳定性好,乳液胶膜表面硅原子的质量分数为0.92%;该有机硅改性水性聚氨酯软段相与硬段相的微观相分离增大,乳液胶膜的耐水性能和热稳定性提高;该有机硅改性水性聚氨酯乳液作为织物涂层剂时,可以赋予织物柔软、滑爽的风格。     

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。     

耐黄变水性聚氨酯分散液的制备和性能

以聚氧四亚甲基二醇(PTMEG)和聚醚二元醇(N220)为复配的多元醇,三羟甲基丙烷(TMP)为交联剂,与异佛尔酮二异氰酸酯(IPDI)反应制备了脂肪族聚氨酯分散液(WPUD)。探讨了PTMEG与N220的配比、TMP的用量对WPUD性能的影响。结果表明,当PTMEG与N220质量比为1∶1,TMP的添加质量分数为1.0%时,WPUD的综合性能较好,涂膜具有较好的耐黄变性能,可用于水性木器涂料。     

Synthesis and properties of novel polyurethane‐urea insulating coatings from hydroxyl‐terminated prepolymers and blocked isocyanate curing agent

A novel series of one‐pack solvent borne polyurethane‐urea insulating coatings was prepared from hydroxyl‐terminated prepolymers (HTP) and blocked isocyanate curing agent (BIC). HTP was prepared from poly z(tetramethylene ether)glycol (PTMEG) with excess amount of toluene diisocyanate (TDI) and subsequent reaction of NCO‐terminated polyurethane with tris(hydroxymethyl‐aminomethane) (TRIS). BIC was prepared from the reaction of trimethylol propane, TDI, and N‐methyl aniline. HTP, BIC, and final products were characterized by conventional methods, and the curing condition was optimized via gel content measurements. Crosslink density of samples was determined via equilibrium swelling method, using Flory‐Rehner equations. Thermal, mechanical, and electrical properties as well as the chemical resistance of prepared coatings were evaluated and compared with commercially available formulations. Effects of structural parameters on physical, electrical, mechanical, and dynamic mechanical (DMTA) properties of the polyurethane‐urea coatings were investigated. The investigation of results showed superior electrical and mechanical properties of prepared green coating as a tailor‐made electrical insulator for metals. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Newly UV-curable polyurethane coatings prepared by multifunctional thiol- and ene-terminated polyurethane aqueous dispersions mixtures: Preparation and characterization

A series of newly developed UV-curable polyurethane coatings were prepared by blending multifunctional thiol- and ene-terminated polyurethane aqueous dispersions. The composition, structure, solution stability and mechanical properties of the title coatings were characterized in detail by FT-IR, photo-DSC and DMA measurements. It was found that the resulting polyurethane coatings showed good solution stability and high photopolymerization activity even after a long time (i.e. 1 month). The incorporation of a waterborne polyurethane chain into the both multifunctional thiols and ene monomers promoted their solution stability and avoided any reaction between thiols and ene groups as a result of their high reacting activity in non-aqueous systems. UV-cured films prepared by this method were found to exhibit excellent physical properties with improvements over what can be attained directly with current UV-curable urethane-acrylate based systems. This method allows for the preparation of high performance UV-curable polyurethane aqueous coatings based on thiol-ene chemistry systems.     

Aminoglycolysis of waste poly(ethylene terephthalate) with diethanolamine and evaluation of the products as polyurethane surface coating materials

Aminoglycolysis and simultaneous hydrolysis‐aminoglycolysis of poly(ethylene terephthalate) (PET) wastes by diethanolamine (DEA) was attempted in the presence of xylene, with the aim of obtaining intermediates containing both hydroxyl and carboxyl end groups, which could be employed in polyurethane surface coatings. Aminoglycolysis and simultaneous hydrolysis‐aminoglycolysis reactions were carried out with the catalysis of zinc acetate (ZnAc) at high temperatures and relatively high pressures. Depolymerization products were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Differential Scanning Calorimeter (DSC). To prepare polyurethane surface coating films, the depolymerization products were reacted with 1,4 butanediol (BDO) and toluene diisocyanate (TDI) in the presence of dibutiltin dilaurate (DBTDL) catalyst and pyrogallol inhibitor. After the films prepared, the physical properties such as hardness, drying degree, adhesion, and impact resistance of these films were investigated. The intermediates yielded from medium to very hard coatings with excellent adhesion and having medium to very good drying degree. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers     

有机硅/丙烯酸酯改性水性聚氨酯的合成及性能

以异佛尔酮二异氰酸酯(IPDI)、二羟甲基丙酸(DMPA)、聚酯二元醇(XH-111)、丙烯酸羟乙酯(HEA)和3-氨丙基三乙氧基硅烷(KH-550)等为主要原料,分别制得HEA封端和HEA、KH-550共同封端的水性聚氨酯乳液,再加入丙烯酸酯单体进行自由基引发聚合,分别制备出丙烯酸酯改性和丙烯酸酯、KH-550共同改性的水性聚氨酯复合乳液。通过傅立叶变换红外光谱(FTIR)、热失重分析(TGA)、X射线衍射分析(XRD)和力学性能测试,对改性水性聚氨酯乳液的结构和胶膜的热稳定性、结晶性和力学性能进行了考察。结果表明,改性水性聚氨酯的结晶性降低,热稳定性提高。当w(丙烯酸酯)增大到20%,w(KH-550)增大到15%时,胶膜的拉伸强度由5.6 MPa增加到23.9 MPa,断裂伸长率由491%降到247%。     

Synthesis and photopolymerization of hyperbranched polyurethane acrylates applied to UV curable flame retardant coatings

A series of hyperbranched polyurethane acrylates containing phosphorus were prepared by reaction of a phosphorus‐containing triol with toluene‐2,4‐diisocyanate and hydroxylethyl acrylate at given ratios. The resins obtained were found to polymerize rapidly in the presence of a photofragmenting initiator under UV irradiation, and the maximum polymerization rate increased with temperature up to 125 °C, then decreased quickly. The UV cured films have flame retardancy with a limiting oxygen index of 27.0. © 2002 Society of Chemical Industry