LY-207汽车用点焊密封胶的研制

本文着重研究了LY－207汽车用点焊密封胶与其它同类产品性能的对比。     

发泡型汽车点焊密封胶的研制

研究了单组分发泡型汽车点焊密封胶的基础配方及制胶工艺 ,并与日本产品进行了性能对比     

DH—2点焊密封胶的研制及应用

DH-2点焊密封胶是由合成橡胶、导电材料、填料等成份组成的非溶剂导电密封胶。可涂在待焊的冲压件搭接面之间,形成富有弹性的胶膜,起到密封、减震、防水和防锈的作用。     

新型中空玻璃密封胶的研制与应用

介绍新型中空玻璃用密封胶条-脱丙酮型室温硫化硅橡胶和聚硫橡胶的研制与应用，讨论和比较了这两种密封胶制造加工工艺以及性能方面的差异。进而对各自的不足提出了改善的方法。     

喷涂型汽车油箱点焊密封胶的研制

从油箱喷塑固化工艺条件出发,以环氧树脂(EP)和小分子聚酰胺为主要原料,制备了两种不同配方的汽车油箱用点焊密封胶。测试了点焊胶在90#汽油和0#柴油中的耐油性和粘接强度,并对三种不同连接接头(胶接、点焊、胶焊)的粘接强度进行了对比和分析。结果表明:点焊胶的固化工艺与汽车镀锌板类油箱表面漆层的固化工艺相同,故不必增加点焊胶的固化设备和工序;两种点焊胶具有较好的粘接性能,其T型剥离强度分别为89.0kN/m和92.0kN/m,拉伸剪切强度分别为13.3MPa和12.9MPa;两种点焊胶在90#汽油和0#柴油中浸泡360d后,试样的粘接强度降幅不明显,说明其具有一定程度的耐油性;将两种点焊胶用于汽车油箱的密封中,既具有良好的粘接密封性能,又解决了镀锌板类油箱渗漏油等问题。     

汽车密封条用密封胶的研制

介绍了SVR -Ⅰ型密封胶的原材料选择、制备方法、应用性能以及批量试产结果和试用结果     

螺纹干膜密封胶的研制及在汽车上的应用

本文述及一种预涂型螺纹密封胶产品的配方设计及制备工艺，通过系列试验证明了研制产品的主要性能与国外同类产品相当，具备技术可靠性和工艺可行性。目前，相关技术已在东风康明斯发动机装配线得以成功应用并具良好的推广前景。     

汽车胶粘剂密封胶及其应用技术的发展

介绍了国内近年来汽车胶粘剂密封胶的应用现状和有关品种的国内外开发研制情况,展望了汽车用胶的未来发展前景。     

单组份聚氨酯密封胶的研制及应用

介绍一种新型单组份聚氨酯密封胶,着重叙述了密封胶制备的基本原理、反应条件及产品性能,以及简单的应用情况.     

广研牌硅酮密封胶在汽车发动机上的应用研究

介绍了广研牌硅酮密封胶在汽车发动机上的应用情况，通过台架试验和道路试验表明在汽车发动机上采用广研牌硅酮密封胶是一项可行的工艺技术改进，能够提高发动机的密封可靠性和使用寿命，降低加工成本和产品成本。     

车用丁基密封胶的研制

介绍了车用丁基密封胶的研制过程,制备工艺及性能特点,该胶防水、抗老化性能优越,可以取代进口产品使用。     

YM-1非硫化型点焊密封剂的研制与应用

概述了ＹＭ－１非硫化型点焊密封剂的组份、性能与应用,为ＹＭ－１非硫化型点焊密封剂的应用提供了使用依据。     

浅谈点焊密封胶在白车身制造中的应压

为保证整车的密封性,满足日益严格的NVH与防锈要求,需在焊缝间涂布点焊密封胶。介绍了点焊密封胶分类、使用工艺及性能。实际生产经验表明,选择合适的点焊密封胶、固化工艺及涂胶量,对保证整车品质和性能具有重要作用。     

ＹＭ—１非硫化型点焊密封胶在客车生产中的应用

１前言在汽车制造业,胶接点焊工艺具有点焊部位气密、水密性好,抗锈蚀能力强等特性,因此得到了广泛地应用。但由于硫化型点焊密封胶的固化温度在１３０－１８０℃之间,所以一般不适合作为大型客车生产的点焊密封剂。ＹＭ－１非硫化点焊密封胶是我厂为提高客车产品质量而研制的一种不干粘着型点焊胶,使用这种点焊胶后,不需加热后处理就能达到最佳密封防腐效果。ＹＭ－１非硫化型密封胶是以混合树脂为主体材料,加入其他助剂混炼而成的黑色糊状物,分为刮涂与刷涂两种类型,都具有施工方便,气密、水密性好,抗锈蚀能力强、点焊缺陷率低…     

Mechanical,dielectric, and thermal properties of polydimethylsiloxane/polysilsesquioxane nanocomposite for sealant application

Polysilsesquioxanes (PS) powder was synthesized from methyltrimethoxysilane and vinyltrimethoxysilane by hydrolytic condensation method in aqueous phase. The prepared PS powder was characterized using Fourier transform infrared spectroscopy, particle size, and polydispersity of the powders was determined using dynamic light scattering technique. Polydimethylsiloxane (PDMS) nanocomposites and the sealant were synthesized using different weight percentage (1–4 wt %) of PS powder and hydrophobic fumed silica. Tensile strength and thermal stability of the nanocomposites showed perceptible enhancement on increasing the filler ratio when compared to pristine PDMS composites. The surface morphology and the extent of filler dispersion were visualized from the scanning electron microscopy images. Dielectric strength of the composites also showed significant improvement on increasing the filler loading. Poly(methyl/vinyl)silsesquioxane (PMVS) (4 wt %) reinforced composites showed a considerable enrichment in properties when compared to other formulations. Adhesive strength of silicone sealant on both the alumina and mild steel substrate was studied by conducting lap shear test. PMVS-loaded nanocomposites exhibited more adhesive strength on both the substrates and hence it can be used as a sealant in electronic assemblies. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47228.     

连铸水口密封剂的研制与应用

通过对连铸水口接缝处热状态的分析 ,提出了水口接缝密封剂合理的工作温度区间。由此研制的密封剂用于水口接缝处 ,水口内负压测定和钢样分析结果表明 ,密封剂对钢流保护作用显著 ,达到了氩气保护效果。     

纵缝焊接升降平台的开发及利用

介绍了一种解决筒体埋弧自动焊接工作的纵逢升降平台,它可实现流水作业,降低了成本,提高了工效。     

适用汽车PVC底漆纳米碳酸钙的研制及应用

通过实验表明，粒径为40—80nm的碳酸钙因具有很好的触变性而被用于PVC汽车底盘防石击涂料，生成具有良好触变性和屈服值的纳米碳酸钙的工艺为：在氢氧化钙温度为15—25℃、质量分数为5％-10％时，通入二氧化碳，当碳化到pH=7时，停止通入二氧化碳，通过加入表面处理剂，经脂肪酸或脂肪酸盐改性后，处理剂用量为纳米碳酸钙的2．0％～4．0％。生成的纳米碳酸钙作为高档填料和流变助剂，应用于涂料、油墨及密封胶、粘合剂等，具有良好的触变性和屈服值。     

Synthesis and application of dual-curable PVB based adhesive formulations for cord/rubber applications

In this research, formaldehyde-free dual-curable adhesive formulations containing polyvinyl butyral (PVB) were prepared with the reaction of 2,4-toluene diisocyanate (TDI) and 2-hydroxyethyl methacrylate (HEMA) and then applied on cord fabrics upon adhere onto the rubber surfaces. The effects of PVB ratio on peel strength value between the cord and rubber were studied. The structure of the oligomer was characterized by FTIR and ¹H NMR spectroscopy. Thermal properties of coated and UV-cured fabrics were investigated by TGA and DSC. Surface wettability properties of the fabrics after coating were observed with contact angle measurement. The peel strength between cord/rubber surfaces was determined by T-peel test after thermal curing stage under heat and pressure. Results showed that peel strength value increases with increasing PVB amount in the formulation. The highest peel strength of 94.7 N/cm was observed when 5% PVB was included in the formulation. This study leads to a new type of promising adhesives with superior peel strength for cord/rubber applications as it is being a totally formaldehyde-free process.