JH—3橡胶型压敏胶的研究

介绍了以天然橡胶和丁苯橡胶为主材料，以烃类树脂为增粘剂压敏胶的制备，并研究了丁苯橡胶、树脂、填料及其它助剂对压敏胶性能的影响。     

增粘树脂的乳化及其在压敏胶中的应用

增粘树脂乳液是正在发展中的水基橡胶压敏粘合剂的主要组分之一。本文介绍了增粘树脂的若干乳化方法,并介绍了羧基丁苯橡胶胶乳、天然橡胶胶乳及丙烯酸酯乳液与增粘树脂乳液配制的压敏胶的粘接性能。     

橡胶型压敏胶粘剂的研制

本文介绍了以天然橡胶、丁苯橡胶和α-萜烯树脂为主体材料制备压敏胶的工艺过程,及对影响性能的一些因素进行了分析讨论。     

标签用热塑性弹性体SDS热熔压敏胶性能的探讨

为改善热熔压敏胶黏制品一不干胶标签的黏附性能,并进一步降低生产成本,研究了以苯乙烯系热塑性弹性体SDS（包括SBS、SIS）为基本树脂合成的热熔压敏胶的性能,并讨论了增黏树脂及软化剂的种类和用量对标签用热熔压敏胶性能的影响。结果显示,在以SIS为主体材料的热熔压敏胶中,添加价格较低的SBS,当其配比在15／85～25／75之间,热熔压敏胶的性能有所提高;而增黏树脂及软化剂的优化,对胶黏剂的综合性能有着不可忽视的作用。     

耐低温型热熔压敏胶的研制

本文以苯乙烯-异戊二烯-苯乙烯嵌段聚合物(SIS)为主体聚合物,配以增粘剂、增塑剂、防老剂等研制了一种耐低温的热容压敏胶(HMPSA),实验结果表明,主体聚合物SIS中的二嵌段成分含量越高,所得热熔压敏胶的耐低温性能越好;在增粘树脂中增加一定含量的液体增粘树脂可以有效地提高压敏胶的耐低温性能。通过正交试验,所得耐低温热熔压敏胶各组分的质量比为:SIS∶萜烯树脂∶液体增粘树脂∶脂肪族矿物油∶防老剂=100∶80∶30∶50∶1。     

PVC装饰胶带用溶剂型丙烯酸类压敏胶的研制

采用溶液聚合法合成了丙烯酸酯类压敏胶，考察了树脂组成、粘度、固化剂和增粘树脂用量等因素对压敏胶性能的影响，并采用转移涂布法制备了性能良好的PVC装饰胶带。     

高性能有机硅压敏胶的研制

以价格低廉的水玻璃和四甲基二烷基二硅氧烷为原料制得MQ树脂,再与107硅橡胶反应制得压敏胶.考察了水玻璃与四甲基二烷基二硅氧烷的加料顺序及配比对MQ树脂性能的影响,MQ树脂改性基团、MQ树脂和107硅橡胶的缩合反应时间对压敏胶性能的影响,过氧化苯甲酰(DPO)用量对压敏胶剥离强度的影响,有机硅压敏胶对各种基材的粘接性能以及苯基对有机硅压敏胶耐热性的影响.结果表明,制备MQ树脂的较佳工艺为:水玻璃水解0.5 h后加入四甲基二烷基二硅氧烷,M:Q控制在0.6～1.0,苯基和乙烯基的摩尔分数分别为5%和2%(相对于甲基);制备有机硅压敏胶的较佳工艺为:缩合反应时间4 h,BPO的添加量为压敏胶质量的3.0%;苯基的引入使有机硅压敏胶的热失重温度提高50℃.采用较佳工艺制得的有机硅压敏胶对聚酯和聚酰亚胺薄膜基材均具有良好的附着力.     

溶剂型橡胶系压敏胶的研究

采用自交联工艺合成溶剂型橡胶系压敏胶,讨论了增粘树脂的用量、软化剂的用量、交联剂的用量、聚合反应温度、烘胶温度和烘胶时间对压敏胶性能的影响。实验表明,增粘树脂可以有效地提高压敏胶的初粘性和剥离强度,交联剂能够全面调节压敏胶的性能,适当的烘烤温度和烘烤时间有利于提高压敏胶的粘接性能。得出了最佳工艺条件为:增粘树脂与天然橡胶的质量比为701∶00,软化剂含量为20%,交联剂为0.4%,接枝共聚的温度为80℃。     

JD—21压敏胶粘带的研制

以涤纶薄膜为基材,涂以底胶及以氯醇橡胶为主,配以增粘树脂等组成的面胶,制成具有良好的耐氟利昴、无水乙醇及热老化等特点的JD—21压敏胶粘带。本文介绍了压敏胶及胶带的制备和性能。着重讨论了压敏胶的组份(聚酮树脂,氯醇橡胶,填充剂等)对胶带性能的影响等。     

UV本体聚合制备压敏胶的性能研究

以丙烯酸酯类单体为原料,采用UV本体聚合的方法制备丙烯酸酯预聚物,然后补加引发剂和光敏树脂后制备得到压敏胶。选择丙烯酸(AA)作为硬单体,考察了单体的选择及配比、预聚物中单体转化率、固化光照强度、光敏树脂交联剂以及引发剂用量对压敏胶性能的影响,并通过TG表征了固化前后的热稳定性,DSC表征了玻璃化温度,最后将光聚合与热聚合生产的压敏胶进行了对比。结果表明:当AA含量为10%,BA与2-EHA质量比为4:1,光敏树脂用量为3%~3.5%时,压敏胶的综合性能最佳;而较低的固化光照强度可以赋予压敏胶更好的力学性能,适宜的引发剂用量可以提高固化速率。与加热溶液聚合相比,UV本体聚合制备的压敏胶无论在性能还是生产方式上都具有很大的优势。     

Durability studies of aluminium/ aluminium joints bonded by chlorobutyl rubber-carboxylated nitrile rubber and epichlorohydrin rubber-carboxylated nitrile rubber blends

Two novel rubber blends based on chlorobutyl rubber ( )-carboxylate nitrile rubber ( ) and epichlorohydrin rubber (ECO)-carboxylated nitrile rubber ( ) can be used as adhesives for aluminium/aluminium bonding. Incorporation of silica filler in the blend and carbon black in the blend improves joint strength. The adhesives show remarkable water and salt water resistance. The adhesives based on show remarkable heat and water resistance. Heat stability of the adhesives based on is not satisfactory but can be improved by the application of silane primer on the aluminium surface. Silane primer also improves the paraffin oil resistance. The increase in joint strength resulting from the application of silane primer is due to the formation of Si-O-Al linkages at the aluminium/primer interface.     

Viscosity and shear strength of natural‐rubber‐based adhesives in the presence of gum rosin and petroresin

The viscosity and shear strength of pressure‐sensitive adhesives based on natural rubber (standard Malaysian rubber grade L) were studied with gum rosin and petroresin as the tackifying resins. Effects of the concentration of the tackifying resin and the molecular weight of rubber on the two properties were systematically investigated. Toluene was used as the solvent throughout the study to prepare the adhesives. The viscosity and shear strength of the adhesives were determined with a rotary viscometer and a texture analyzer, respectively. For the shear test, a hand coater was used to coat the adhesives on the release paper substrate to provide coating thicknesses of 60 and 120 μm. The results indicated that the viscosity increased with the resin loading and molecular weight of rubber increasing. The viscosity of the adhesive prepared from petroresin had a higher value than that of the gum‐rosin‐based adhesive. The shear strength of the adhesives decreased gradually with increasing resin content for both tackifying resins and coating thicknesses, and this observation was attributed to the decrease in the cohesive strength due to the dilution effect of the resins. However, the shear strength passed through a maximum at a molecular weight of rubber of 8.5 × 10⁴ for both resins. The gum‐rosin‐based adhesive consistently showed higher shear strength than that of the petroresin/natural rubber adhesive because of the better cohesiveness and compatibility of the former system. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Aluminium-Aluminium Bonding by Rubber Blend Based on Epichlorohydrin Rubber and Carboxylated Nitrile Rubber

Rubber blends based on epichlorohydrin rubber and carboxylated nitrile rubber can be used as adhesives for aluminium-aluminium bonding. The bond strength depends on blend composition and moulding conditions, such as time, temperature and pressure. Lewis acid/base type interaction is responsible for this type of adhesion. The failure mechanism of the composites was studied by SEM.     

Aluminium-Aluminium Bonding by Rubber Blend Based on Epichlorohydrin Rubber and Carboxylated Nitrile Rubber

Rubber blends based on epichlorohydrin rubber and carboxylated nitrile rubber can be used as adhesives for aluminium-aluminium bonding. The bond strength depends on blend composition and moulding conditions, such as time, temperature and pressure. Lewis acid/base type interaction is responsible for this type of adhesion. The failure mechanism of the composites was studied by SEM.     

Studies on the adhesives for rubber to rubber bonding

Novel adhesive compounds for bonding natural rubber vulcanizates and NR/BR (natural rubber/polybutadiene) blend vulcanizates were developed. It has been shown that reclaimed latex waste can replace natural rubber in the adhesive, either partially or fully. The adhesives were found to retain their bond strength even after 5 weeks of aging at 30°C.     

聚合物帘线与橡胶粘合研究进展

从测试与分析方法、纤维与粘合剂的界面粘合、浸胶帘线与橡胶的粘合、间苯二酚－甲醛－胶乳浸胶层的物理机械性能等方面总结了人造丝、尼龙、聚酯和芳香聚酰胺等聚合物帘线与橡胶的粘合方法及最新进展。     

氯丁胶粘剂,涂料的研究进展

介绍了国内外氯丁胶粘剂、涂料领域的进展情况。建议开发羧基化氯丁橡胶新品种。     

表面处理对硅橡胶胶粘剂胶接性能的影响

本文着重研究了不同表面处理条件下硅橡胶胶粘剂的粘接性能。有机硅烷偶联剂对提高硅橡胶胶粘剂的粘接性能有显著效果,其中以GPJ－43的处理效果为最佳。铝合金试样机械打磨后采用不同溶剂清洗对粘接性能也有影响,其中以三氯乙烯的效果为最好。磷酸阳极化是很有效的表现处理方法。对铝－铝粘接界面的分析发现,硅橡胶胶粘剂粘接接头的破坏一般为胶粘剂的内聚破坏或胶粘剂与偶联剂界面的粘附破坏。     

Polyester Polyol-Based Polyurethane Adhesive; Effect of Treatment on Rubber Surface

Polyester polyols were synthesized using vegetable oil fatty acids having different characteristics (mainly in terms of hydroxyl functionality) and epoxy resin, using triethylamine as a catalyst. Polyols were characterized by the FTIR spectroscopy. Polyurethane adhesives were synthesized from it and used in bonding rubber. Treatment of sulphuric acid on the non-polar styrene butadiene rubber (SBR) surface was studied for the bond strength improvement via an increase in wettability of the rubber surface. Wettability was found by measuring the contact angle using Goniometer. Bond strength was evaluated by a 180° T-peel test. The surface modification and mode of bond failure were studied by Scanning Electron Microscopy (SEM). The synthesized polyurethane adhesives were compared with the commercial adhesive.