日本研制成功低温胶粘剂

日本阿德尔公司研制成功一种独特的光学部件用紫外线固化胶粘剂。这种胶粘剂即使在—70℃的低温下也能保持优异的粘接强度,极少光固化胶粘剂能耐这样低的温度。     

2005年《粘接》1～6期总目次

研究报告及专论J-213快速固化厌氧胶的研究………………………(1-1)耐热结构厌氧胶的研制………………………………(1-4)ATBN改性的耐高温环氧胶粘剂的研究……………(1-7)纳米有机蒙脱土改性邻甲酚醛环氧树脂的研究……(1-9)草浆造纸黑液用于人造板胶粘剂的研究…………(1-12)汽车灯用热熔胶的研究及性能表征………………(1-14)涂布纸粘合剂CP树脂的研制………………………(1-16)结构型紫外线固化胶粘剂的研究…………………(1-18)聚硫密封剂底胶的研究……………………………(1-21)钛合金粘接件表面技术研究………………………(1-24)影…     

弹性体胶粘剂的开发近况

本文介绍了弹性体胶粘剂三大产品(腔粘剂、压敏胶带和密封剂)的开发近况,其胶粘剂产品中主要介绍了结构型、非结构型、水基型和橡胶加工工艺用胶粘剂四种类型。     

紫外线固化胶粘剂

紫外线固化胶粘剂,最近在所有产业界引起人们的注目,尤其是在电子、电气元件工业,开发出液晶显示板封缄线圈的未端固定、触点元件的临时固定、透镜的粘接、组合件的固定及封缄以及接线柱的封缄等多种用途。紫外线固化胶粘剂之所以特别引起人们的注视,首先是它可在短时间内完成粘接,又因其是一液型,可省掉计量。混合等诸多麻烦,具有不必加热等许多优点。     

国内外木材结构型胶粘剂述评

本文介绍了国内外木材结构型胶粘剂的品种、性能、适用范围、质量评价等发展概况,并提出了该类型胶粘剂的研究方向。     

橡胶胶粘剂发展概况

<正> 早期的橡胶型胶粘剂主要是溶剂型和乳液型天然橡胶胶粘剂,自1932年氯丁橡胶胶粘剂问世后,合成橡胶胶粘剂迅速发展。其后开发了橡胶与树脂混合的结构胶粘剂,以及特种胶粘剂。橡胶型胶粘剂可分为三大类:胶粘剂、压敏胶粘带和腻子(密封胶)。其中胶粘剂又可分为:结构型、非结构型、水基型和橡胶加工工艺用粘合剂等四个类型。其基本特性是:①初期粘合力较大,容易粘接。②粘合接头具有优良的耐屈挠、抗振和抗蠕变性能,适于不同膨胀系数材料及在动态(冲击     

辐射固化胶粘剂的研究和应用

辐射固化胶粘剂由于其固化速度快、性能优良近几年得到了很大发展 ,已作为胶粘剂的一类新胶种用于各种不同的领域。介绍了辐射固化胶粘剂的特点、性能及应用 ,综述了辐射固化胶粘剂研究的进展     

基于磁共振与高频超声的颈椎重建胶固性能与应用研究

基于磁共振与高频超声的颈椎重建用胶固化性能和拉剪强度性能要求的需要,以双酚A型环氧树脂和3种常温固化型胺类固化剂为主要原料,制备了3种不同组分的常温固化型胶粘剂,对比分析了胶粘剂的固化性能、室温拉剪强度和断口形貌。结果表明,随着固化温度的升高,3种胶粘剂的固化时间都呈现下降的趋势;在相同固化温度下,3种胶粘剂固化时间从小至大顺序依次为：胶粘剂1号、胶粘剂2号、胶粘剂3号,即胶粘剂1号的固化时间最短。随着固化温度升高,3种胶粘剂试样的拉剪强度平均值都呈逐渐上升的趋势;在相同固化温度下,3种胶粘剂试样的拉剪强度从大至小的顺序依次为：胶粘剂1号、胶粘剂2号、胶粘剂3号;弹性模量从大至小顺序依次为：胶粘剂1号、胶粘剂2号、胶粘剂3号;断后伸长率从小至大的顺序依次为：胶粘剂1号、胶粘剂2号、胶粘剂3号。虽然胶粘剂1号的固化时间最短,但其拉剪强度平均值最低,推荐重建用常温固化型胶粘剂使用胶粘剂3号。     

美国射线固化胶销售预测

用于胶粘剂固化的高能射线有三种:紫外线(以下简称UV)、电子束(以下简称EB)和γ射线。γ射线应用很少,仅限于几种特殊说明的宇航和电子方面的应用。据最新研究指出,UV固化胶在1983年的销售量达8.5万磅,到1988年可达约29万     

单组分湿固化聚氨酯胶粘剂的研究进展

介绍了单组分湿固化型PU(聚氨酯)胶粘剂的发展概况,讨论了该类胶粘剂预聚体的合成方法。重点介绍了两种新型单组分湿固化PU胶粘剂(硅氧烷封端湿固化PU胶粘剂和潜性湿固化PU胶粘剂),并展望了其发展前景。     

紫外光UV固化粘合剂

紫外光固化粘合剂随着紫外光固化技术的发展获得了快速发展。详细介绍了紫外光固化粘合剂的应用机理及其组成成份 ,如齐聚物、反应单体、光引发剂。并列举了几种不同类型的紫外光固化粘合剂 ,即层压粘合剂、压敏粘合剂和双重光固化粘合剂等。     

紫外光固化粘合剂的发展

紫外光固化粘合剂随着紫外光固化技术的发展获得了快速发展。本文从应用角度评述了紫外光固化粘合剂的组成。诸如：可聚合齐聚体,活性单体,光引发剂等,并主要介绍了两种紫外紫外光固化粘合剂,即层压粘合剂和压敏粘合剂。提出了发展我国上光固化粘合剂的几点建设。     

Effect of different aging conditions on the shear performance of joints made between GFRP and glass with a UV absorbance coating

In this experimental study, a series of tensile tests were conducted on double-lap specimens, where UV absorbance laminated glass was adhesively bonded on GFRP polyester pultruded support. Three different types of adhesives were compared, two epoxy and one polyurethane, and both un-aged and aged conditions were investigated. Three ageing conditions, simulating the external environment exposure, were investigated, i.e. temperature/moisture changes (continuous condensation), UV exposure, temperature/moisture changes and UV exposure, in order to test the effectiveness of the UV absorbance film and the durability of the bonding system. This experimental campaign aims to verify if the UV film affects the compatibility of the bonding system between GFRP and glass to be used for structural applications.The experiments showed that the PU adhesive is not the most suitable for structural applications, since it shows a great deformability of the joint with a very small stiffness, if compared with the epoxy ones. With regard to artificial aging, the experiments showed that aging has a different impact on different types of adhesives; in particular a slight effect on the mechanical performances or sensitive reduction of the load carrying capacity and of the joint elongation were observed. In general the continuous condensation produced the worst effects on the specimens, while better results were observed after the UV radiations, even though the beneficial effect of the UV rays, which improve the mechanical behavior of the joint for a further polymerization of the adhesive, are impeded by the UV absorbance film.     

光固化胶粘剂的研究进展

介绍了紫外光和可见光固化型胶粘剂体系中光引发剂的最新研究进展,重点论述了紫外光和可见光固化型胶粘剂的最新发展。     

紫外光（UV）固化胶黏剂收缩率与强度的研究

UV胶黏剂的固化收缩率与固化后的残留应力乃至粘接强度有着密切关系。对比UV胶黏剂中不同丙烯酸单体、几种低聚物和阳离子单体的收缩率和相应的粘接强度。讨论了单体和树脂类型对收缩率和粘接强度的影响。介绍了以低收缩丙烯酸酯树脂和阳离子树脂为主体树脂,以低收缩单体为稀释剂、配合填料和适当增强剂制备出混合型UV胶黏剂。该胶黏剂粘接强度和耐久性好,其固化收缩率为3．5％,远低于普通自由基型UV胶黏剂。经湿热老化试验后,粘接强度保持率仍保持在80％。     

胶粘剂在光电元件加工中的应用及发展趋势

阐述了光电元件上盘和保护用胶粘剂的一般技术要求。重点介绍了光电元件加工过程中常用的无机胶粘剂、热熔胶、EP(环氧树脂)胶粘剂、压敏胶保护膜、瞬间胶、硅橡胶及UV(紫外光)固化胶的技术特点及其在光电元件上盘和保护过程中的应用,并对其发展趋势进行了展望。     

UV光固化胶粘剂的研究与应用

紫外光(UV)固化胶粘剂是发展迅速的绿色精细化工产品。本文从光引发剂、预聚物和活性稀释剂3方面介绍了UV光固化胶粘剂的最新研究进展,以及UV固化胶粘剂在医疗、电子电器、汽车等方面的应用。展望了UV固化胶粘剂的研究与发展方向。     

UV curable pressure‐sensitive adhesives for fabricating semiconductors. II. The effect of functionality of acrylate monomers on the adhesive properties

In an attempt to control the adhesive properties of acrylic copolymer‐based pressure‐sensitive adhesives, a series of multifunctional acrylate monomers were added and UV cured. The adhesive compound with a difunctional monomer had increased peel strength after UV curing. On the other hand, the compound with a tri‐ or more functional (polyfunctional) monomer had markedly decreased strength after UV curing. Those adhesives containing any polyfunctional monomer also showed much higher storage modulus than an adhesive containing a difunctional monomer. The greater volume contraction of UV‐cured polyfunctional monomer suggested microvoids at the interface between the adhesive layer and the adherent, resulting in poor strength. Estimated values of the peel strength of UV‐cured adhesives according to the theoretical equations proved that the strength is approximately inversely proportional to the elastic moduli. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 2889–2895, 2004     

Z97光敏胶粘剂的研制

合成了光反应性稀释剂烯丙基双酚A丙烯酸酯（AEDB）,用这种稀释剂配制成Z-97光敏胶。该胶粘剂对玻璃的粘接强度及耐水性均较以甲基丙烯酸甲酯（MMA）做稀释剂配制的光敏胶有所提高。