光固化聚氨酯丙烯酸酯胶粘剂的研究

以聚醚多元醇、二异氰酸酯和丙烯酸丙酯为原料,合成了聚氨酯内烯酸酯树酯,并对此为主体,通过添加光引发剂、活性稀释剂、增塑剂、增粘剂等制成光固化胶粘剂,用于生产夹层安全玻璃和防弹玻璃。研究了丙烯酸羟丙酯和活性稀释剂用量以及－NCO／－OH量比等因素对粘胶剂性能的影响。采用光固化工艺和自制玻璃模具制备固化胶膜,行为力学和光学性能测试。实验结果表明L当活性稀释剂用量为50％－60％,丙烯酸丙酯（HPA）为10％－15％,增粘剂为5％－10％,增塑剂为15％－20％以及－NCO／－OH量比为0．95：1时,胶粘剂具有较好的综合性能。     

光固化聚氨酯丙烯酸酯胶粘剂的研究

以聚醚多元醇、二异氰酸酯和丙烯酸羟丙酯为原料，合成了聚氨酯丙烯酸酯预聚体，并以此为基料，通过添加光引发剂、活性稀释剂、增塑剂、偶联剂等制成光固化胶粘剂。实验结果表明：当活性稀释剂用量为20％～25％、丙烯酸羟丙酯(HPA)为10％～15％、硅烷偶联剂为3％～5％，以及预聚体制备的n(NCO)／n(OH)为0．95：1时，胶粘剂的剪切强度达到15MPa，透射率为98％。该胶粘剂可用于夹层安全玻璃、防弹玻璃、液晶显示器、汽车挡风玻璃、居室安全装饰玻璃的制造。。     

UV光固化胶粘剂基材--聚氨酯丙烯酸酯预聚物的制备

本文翔实的论述了一种重要光固化高分子材料——聚氨酯丙烯酸酯预聚体(PUA)的制备、合成原理、性能及各种因素对PUA合成及其性能的影响．     

光固化的聚氨酯丙烯酸酯胶粘剂

本文着重研究了合成预聚体(光固树脂)的合成条件,光敏固化胶的后配方初步设计,该胶在微电机转子涂层上能取代日本30 X-261胶。同时,文章最后介绍了有关这方面胶粘剂在一些难粘领域的国外最新的专利报道。由于该胶无溶剂,能消除环境污染、节能、固化速度快等优点,尤适于精密仪器、电子计算机系统、微小另部件、光学材料等方面的粘接或涂层。这是一种很有前途的新型胶粘剂。     

光固化夹层安全玻璃胶粘剂的研究

介绍了以丙烯酸酯为主要原料，在热引发剂作用下，先制成预聚物，再添加光引发剂、交联剂等助剂制成的胶粘剂，在阳光或灯光照射下固化，可用于生产夹层安全玻璃。     

UV固化聚氨酯丙烯酸酯预聚体的合成及其性质

聚氨酯丙烯酸酯预聚体的制备是由二步反应完成,本文对预聚体合成过程中各种影响因素进行分析比较,确定最佳合成聚氯酯丙烯酸酯预聚体的工艺条件为：第一步反应温度为60-65℃,时间为4h,n(NCO)：n(OH)=3,催化剂为物料总量的0．4％,第二步反应温度为70．75℃,时间为4h。     

影响水性聚氨酯/丙烯酸酯光固化速度的因素

用甲苯二异氰酸酯、聚己二酸新戊二醇酯、二羟甲基丙酸合成水性聚氨酯,用含双键的甲基丙烯酸羟乙酯封端,制得质量分数为34%的水性聚氨酯/丙烯酸酯水分散液,分别用三种光引发剂固化.结果表明,其中2-羟基-2-甲基-苯丙酮适用于常温固化;1-[4-(2-羟乙氧基-苯基)]-2羟基-2-甲基-丙酮适用于高温条件.当以1-[4-(2-羟乙氧基-苯基)]-2羟基-2-甲基-丙酮为光引发剂,控制光固化温度为80℃,表面光照强度70mW/cm2,引发剂质量分数为4%时,涂膜凝胶化时间为55s,凝胶化程度为 83.4%.此时冲击强度大于50kgcm,吸水率4.69%,附着力1级,耐溶剂性达300次.     

聚氨酯-丙烯酸酯光盘用胶粘剂

选择氨基甲酸酯-（甲基）丙烯酸酯低聚物、羟基（甲基）丙烯酸酯（羧基团与甲苯丙烯酸酯基团相隔3个以上碳位）和光引发剂等为原料，经相应工序，日本精涂株式会社科研人员制备出高性能的光盘用聚氨酯-丙烯酸酯胶粘剂新型产品，其耐热性、抗湿性优异，且对聚碳酸酯（PC）及金属（Al等）皆有良好粘接效能，质量上明显优于传统光盘用胶粘剂。光盘为现代高科技产品，市场容量大。     

Preparation and properties of dual-cure polyurethane acrylate

Dual-cure polyurethane acrylates (PUA) with different double bonds content were synthesized by using aliphatic polyisocyanate and 2-hydroxyethyl acrylate (HEA). The molecular structures were identified by Fourier transform infrared (FTIR) spectrum and nuclear magnetic resonance (NMR). Molecular weight (M_w) and glass-transition temperature (T_g) of PUA were measured by gel permeation chromatography and DSC, respectively. The pendulum hardness, pencil hardness, flexibility and abrasion resistance properties of dual-cure system were tested, the results indicated that the pendulum hardness, pencil hardness, and MEK resistance increased, but the flexibility reduced with the double bonds content increased. The mechanical properties of dual-cure system were greatly improved after the heat treatment.     

新型双组分丙烯酸环氧酯胶粘剂的制备与性能研究

利用丙烯酸环氧酯及环氧树脂E-51为主体,以酸酐为固化剂研制一系列双组分胶粘剂,并对其凝胶化时间、吸水性、拉伸剪切强度、接触角、表面能等各项性能进行了研究.该系列胶粘剂吸水性较低(1.18％～1.78％)、疏水性强、剪切强度最高达30.9 MPa,综合性能良好.     

Preparation and properties of UV-curable polyurethane acrylate ionomers

Ultraviolet (UV)-curable polyurethane acrylate ionomer (PUAI) prepolymers were synthesized from isophorone diisocyanate (IPDI), poly(methylene ether) glycol (PTMG), 2,2-bis(hydroxymethyl) propionic acid (DMPA), triethylamine (TEA), 2-hydroxy ethyl acrylate (HEA), and dibutyl tin dilaurate (DBT) as a catalyst. UV-curable polyurethane acrylate ionomer aqueous dispersion was formulated from the prepolymers, water (30 wt %), and 1-hydroxycyclohexylhenyl ketone (Irgacure 184) as a photoinitiator. The films of UV-cured polyurethane acrylate ionomer were formed by curing the dispersion using a medium-pressure mercury lamp (80 W/cm; λ max = 365 nm). Gel content decreased with increasing water content in the aqueous dispersion. Effects of DMPA content and molecular weight of PTMG and the degree of neutralization on the physical properties were investigated. It was found that the storage modulus increased with increasing DMPA content. Tensile modulus and strength decreased with increasing the molecular weight of PTMG from 650 to 2000. The glass transition temperature shifted to a higher temperature as the content of DMPA increased. As the degree of neutralization increased, the tensile strength and modulus decreased. However, the elongation at break increased. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:2153–2162, 1998     

Preparation and characterization of UV-curable hyperbranched polyurethane acrylate

A series of UV-curable hyperbranched polyurethane acrylate (HBPUA) oligomers were synthesized with isophorone diisocyanate (IPDI), hyperbranched polyester Boltorn H20 (HBP) and hydroxy-ethyl acrylate (HEA). The structure of HBPUA oligomers was characterized by Fourier transform infrared (FTIR) spectroscopy, ¹H nuclear magnetic resonance (¹H-NMR) spectroscopy, and gel permeation chromatography (GPC). The UV-curing kinetics of HBPUA films with Darocur 1173 were investigated, and their heat resistance and mechanical properties (including hardness, adhesion force, flexibility, and impact strength) were measured. The results show that the HBPUA oligomers have superior photosensitivity and the percent conversion of C=C reaches 81% when radiation time is 43 s. The heat resistance of the cured films decreased slightly with the increase in the content of the urethane-acrylate terminal group. Moreover, the mechanical properties of the cured films were influenced by the content of the OH group in HBP that reacted with the first NCO group of IPDI. When the content was 60%, the cured film had excellent overall properties. The hardness, flexibility, adhesion force, and impact strength were 4 H, 2 mm, 0 grade, and 47 kg cm, respectively.     

UV固化聚氨酯丙烯酸酯耐黄变涂料的制备

以聚己二酸丁二醇乙二醇酯多元醇(PBEA)、异佛尔酮二异氰酸酯(IPDI)、丙烯酸羟乙酯(HEA)、复合活性稀释剂1,6-己二醇二丙烯酸酯(HDDA)/季戍四醇三丙烯酸酯(PETA)为原料,合成了紫外光(UV)固化聚氨酯丙烯酸酯耐黄变预聚体,研究了聚氨酯丙烯酸酯中IPDI和PBEA的物质的量比、活性稀释剂的选择和复配比...     

环氧丙醇法制备醇溶型聚氨酯胶粘剂

以环氧丙醇与不同分子质量的端异氰酸酯聚氨酯预聚物反应,制备出一系列端环氧基聚氨酯主胶。考查了不同配方主胶的外观差异和不同胺类固化剂对表干时间的影响。结果表明,降低主胶的氢键密度,可以改变产品的外观;预聚物分子质量越小,表干时间越短。将自制胶粘剂与市售醇溶胶粘剂进行了对比,发现自制胶粘剂初粘性、剥离强度都略优于后者。     

丙烯酸酯改性蓖麻油基水性聚氨酯乳液的制备

以改性蓖麻油(MCO)、聚碳酸酯二醇(PCDL)、异佛尔酮二异氰酸酯(IPDI)、六亚甲基二异氰酸酯(HDI)和二羟甲基丙酸(DMPA)等为原料合成水性聚氨酯种子乳液,通过MCO的双键活性位实现丙烯酸酯(AC)单体的种子乳液聚合,得到聚氨酯–丙烯酸酯(PUA)乳液。通过FT–IR(傅里叶变换红外光谱)分析、激光粒度仪、旋转黏度计研究了AC单体含量及配比、助剂用量对PUA乳液性能的影响。通过电子拉力试验机、耐水试验和动态力学分析仪研究了不同AC含量PUA膜的力学、耐水和动态力学性能。结果表明:通过种子乳液共聚,PUA均显示一个玻璃化温度,说明聚丙烯酸酯与聚氨酯具有较好的相容性;当n(MCO):n(PCDL)=1.2,n(甲基丙烯酸正丁酯):n(甲基丙烯酸甲酯)=0.9,w(乳化剂SDS)为2.0%,w(引发剂AIBN)为0.2%时所合成的PUA稳定性最好,且具有适中的黏度和较好的粒径分布;随AC含量的提高,PUA胶膜耐水性提高,胶膜硬度和弹性模量逐渐提高,拉伸强度和伸长率均在w(AC)为10%时出现最大值。     

Preparation of waterborne hyperbranched polyurethane acrylate/LDH nanocomposite

A series of novel waterborne hyperbranched polyurethane acrylate (WHPUA)/layered double hydroxide (LDH) nanocomposites based on hyperbranched aliphatic polyester Boltorn H20 (H20) and MgAl-LDH were successfully synthesized by in situ polymerization approach. The MgAl-LDH was firstly modified by sodium dodecyl sulfate (SDS) through the coprecipitation method, and then grafted by isophorone diisocyanate (IPDI), forming a complex with NCO groups at the surface and interlayer of LDH (LDH-DS-NCO). The residual hydroxyl groups after modification with succinic anhydride were crosslinked by the semi-adduct of IPDI reacted with HEA, and LDH-DS-NCO, followed by a neutralization reaction with triethylamine. The resulting water dispersible hyperbranched polyurethane acrylate WHPUA/LDH hybrid oligomer was then exposed to a medium pressure mercury lamp, forming a partially exfoliated WHPUA/LDH nanocomposite in the presence of a fragmental photoinitiator. The chemical structure, crystal configuration, morphology of WHPUA/LDH nanocomposite were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, and high resolution transmission electron microscopy. The experimental results indicated that both the intercalated and exfoliated structures were formed in the UV cured polymer/LDH nanocomposite. The TGA results showed that the thermal stability was improved. Moreover, the pencil hardness was greatly increased, and the flexibility remained at an acceptable level for the UV cured polymer/LDH nanocomposites.