网格结构用橡胶模具胶粘剂研究

研究了一种网格结构用橡胶模具胶粘剂.该胶粘剂主要以RTV-141橡胶为基体,以沉淀法白炭黑为增强填料.测试了白炭黑含量、催化剂用量对橡胶拉伸性能及凝胶时间的影响,并确定了该胶粘剂的组成.研制的橡胶胶粘剂具有适宜的适用期、较高的拉伸强度、邵氏A硬度和较低的线收缩率及密度,完全满足制作网格模具用硅橡胶胶粘剂的要求.     

环保水性胶和热熔胶成为胶粘剂发展方向

据某化工企业技术总监介绍说,皮鞋、运动鞋90％采用胶粘工艺制造.各种鞋用胶粘剂当中,粘外底胶最重要,胶粘性能要求最高,也是制鞋企业、胶粘剂生产企业最为关注的胶粘剂品种.目前粘外底的胶粘剂无论在国内还是国外,基本上以氯丁胶、聚氨酯胶为主.     

木结构用胶粘剂研究应用进展

介绍了木结构及其所用胶粘剂的特征,分别概述了木结构主要的胶粘剂如酚类胶粘剂、聚氨酯类胶粘剂、环氧树脂类胶粘剂、三聚氰胺类胶粘剂和生物质胶粘剂的研究应用现状.最后分析了木结构胶粘剂发展存在的问题,并展望了其发展趋势.     

多异氰酸酯胶粘剂

一、前言聚氨酯胶粘剂系分两大类型,一类是多异氰酸酯胶粘剂,主要以异氰酸酯单体或聚合体配置而成.另一类是聚氨酯胶粘剂,又分单组份与双组份型,是由异氰酸酯与多羟基化合物(聚酯、聚醚)制备的.本文主要介绍多异氰酸酯胶粘剂的粘接机理,品种,使用方法以及改性等问题.一九四七年西德拜耳公司用三苯基甲烷三异氰酸酯作胶粘剂,成功地将橡胶与金属     

环氧树脂液体胶粘剂耐高温性能分析

环氧树脂液体胶粘剂存在不耐高温的问题.以环氧树脂为基料,通过加入聚芳醚腈、碳硼烷以及聚氨酯等三种不同的改性物质,制成三种不同类型的环氧树脂液体胶粘剂,并针对这三种胶粘剂,分析环氧树脂液体胶粘剂耐高温性能.结果表明:通过高温下热重测试,碳硼烷-环氧树脂胶粘剂的表观分解温度和温度指数最高,分别为850.3℃和23.54℃,...     

国外动态

90年代胶粘剂的研究开发动向据日本有关研究会预测,90年代胶粘剂的研究开发动向为:1.提高胶粘剂强度和胶粘的可靠性;2.加快硬化速度;3.无公害;4.追加特殊功能。研究开发课题如:1.高性能高耐久性胶粘剂;2.耐热性胶粘剂;3.超低温用胶粘剂;4.功能性胶粘剂(导电、传热、光学功能胶粘剂);5.优质陶瓷用胶粘剂;6.特种材料用胶粘剂;7.生物体、医疗用胶粘剂;8.适用于机器人和自动机的胶粘剂利用技术;9.可靠性评价技术的确立、耐久性测定技术、非破坏性检查技术等;10.低公害、安全型;11.粘结表面处理技术等。     

房屋建筑外表面陶瓷砖胶粘剂的制备与性能研究

以废弃聚苯乙烯泡沫塑料作为主要原料,通过选取不同的溶剂、增塑剂与填料制备出不同材料的胶粘剂.将各类胶粘剂分别涂布于陶瓷砖与面砖表面,并实施压合与固化后获得各测试试样.测试溶剂类别、增塑剂类别以及不同种类的填料等对胶粘剂性能的影响.研究结果表明:丙酮溶剂与歧化松香对胶粘剂的初粘强度与剥离强度提升效果最为明显;松香和酚醛树...     

不同晶型氧化铝对磷酸盐树脂固化行为的影响研究

在中温固化条件下,以不同晶型的Al2O3作为固化剂,与磷酸二氢铝树脂固化制备磷酸盐胶粘剂.测试了胶粘剂的剪切强度和耐热性,分析了不同晶型Al2O3及其用量对胶粘剂性能的影响,采用DSC、XRD、SEM等手段表征了胶粘剂的固化温度、物相、化学结构、微观形貌以及颗粒分布等.研究结果表明:α-Al2O3作为固化剂得到的磷酸盐...     

2009年第2季度上海市胶粘剂产品质量监督抽查结果

室内装饰装修用的胶粘剂主要用于墙纸、瓷砖、木材等一些比较容易粘接的材料的粘接,由于粘接面较大,通常使用量较多.目前用于建筑装饰装修的胶粘剂品种很多,主要有两类,一类是溶剂型(以溶剂为介质)胶粘剂,如氯丁橡胶型胶粘剂(简称氯丁胶),另一类是水基型(以水溶剂为介质)胶粘剂,如聚乙烯醇缩甲醛(俗称107、801胶)、聚乙酸乙烯酯乳液(俗称白乳胶).     

2011～2012年中国胶粘剂行业竞争格局分析

胶粘剂行业竞争格局(1)国外先进企业垄断格局被打破,国内企业逐步参与高端应用领域的竞争我国胶粘剂行业整体行业集中度较低,中小型企业数量多、分布广,这些企业以技术水平要求较低的普通胶粘剂产品为主,产品利润率较低;但在结构胶粘剂领域,行业集中度相对高.特别是以发行人为代表的少数具有自主知识产权的国内企业以生产技术含量较高的结构胶粘剂产品为主,利润率也相对较高,而国际化工巨头凭借其强大的研发能力和品牌优势,通过在国内建立合资企业或生产基地降低生产成本,在市场占有率和技术研发上占有明显的竞争优势.     

Durability of Adhesive Bonds to Zinc-Coated Steels: Effects of Corrosive Environments on Lap Shear Strength

The effects of corrosive environments on adhesive bonds to electro-galvanized, zinc/aluminum alloy coated, coated electro-galvanized, and cold-rolled steels have been investigated. Bonds prepared using a rubber-modified dicyandiamide-cured epoxy adhesive, an epoxy-modified poly(vinyl chloride)-based adhesive, an acrylic-modified poly(vinyl chloride)-based adhesive a one-part urethane adhesive, and a two-component epoxy-modified acrylic adhesive were exposed under no-load conditions to constant high humidity or cyclic corrosion exposure for 50 days or 50 cycles (10 weeks) respectively.

Over the course of this study, exposure to constant high humidity had little effect on lap shear strength for any of the systems studied. Bond failures were initially cohesive, and with few exceptions remained so.

Bond strength retention under the cyclic corrosion exposure conditions employed was strongly dependent on adhesive composition and on substrate type. On galvanized substrates, lap shear strengths for the poly(vinyl chloride)-based adhesives were reduced by 90-100% during the course of the corrosion exposure, and a change in the mode of bond failure (from cohesive to interfacial) was observed. On the coated electro-galvanized steel substrate, the poly(vinyl chloride)-based adhesives showed about 50% retention in lap shear strength and a cohesive failure throughout most of the corrosion test. The dicyandiamide-cured epoxy adhesive used in this study generally showed the best lap shear strength retention to zinc-coated substrates; bonds to cold-rolled steel were severely degraded by corrosion exposure. The performance of the acrylic and urethane adhesives were intermediate to the dicyandiamide-cured epoxy and poly(vinyl chloride)-based adhesives in strength retention.     

Durability of Adhesive Bonds to Zinc-Coated Steels: Effects of Corrosive Environments on Lap Shear Strength

The effects of corrosive environments on adhesive bonds to electro-galvanized, zinc/aluminum alloy coated, coated electro-galvanized, and cold-rolled steels have been investigated. Bonds prepared using a rubber-modified dicyandiamide-cured epoxy adhesive, an epoxy-modified poly(vinyl chloride)-based adhesive, an acrylic-modified poly(vinyl chloride)-based adhesive a one-part urethane adhesive, and a two-component epoxy-modified acrylic adhesive were exposed under no-load conditions to constant high humidity or cyclic corrosion exposure for 50 days or 50 cycles (10 weeks) respectively.

Over the course of this study, exposure to constant high humidity had little effect on lap shear strength for any of the systems studied. Bond failures were initially cohesive, and with few exceptions remained so.

Bond strength retention under the cyclic corrosion exposure conditions employed was strongly dependent on adhesive composition and on substrate type. On galvanized substrates, lap shear strengths for the poly(vinyl chloride)-based adhesives were reduced by 90–100% during the course of the corrosion exposure, and a change in the mode of bond failure (from cohesive to interfacial) was observed. On the coated electro-galvanized steel substrate, the poly(vinyl chloride)-based adhesives showed about 50% retention in lap shear strength and a cohesive failure throughout most of the corrosion test. The dicyandiamide-cured epoxy adhesive used in this study generally showed the best lap shear strength retention to zinc-coated substrates; bonds to cold-rolled steel were severely degraded by corrosion exposure. The performance of the acrylic and urethane adhesives were intermediate to the dicyandiamide-cured epoxy and poly(vinyl chloride)-based adhesives in strength retention.     

一种用于PVC粘接的环氧树脂胶粘剂

为解决PVC的粘接问题,采用自制对软质PVC具有良好亲合作用的改性环氧树脂增韧树脂制备的环氧树脂胶粘剂,室温固化24h或70℃固化1h可以达到软质PVC材料破坏,使用温度80～100℃。     

FHX-2高速卷烟胶粘剂的制备

通过醋酸乙烯与丙烯酸酯类的共聚制备卷烟接嘴用FHX -2高速卷烟胶粘剂 ,该胶具有初粘力大、干燥速度快、粘接强度高、胶质细腻流动性好 ,废品率低 ,不含有害添加剂 ,可以满足接嘴车速 70 0 0～ 80 0 0支 分钟的要求     

水基胶粘剂的研究与应用进展

综述了聚氨酯、水性丙烯酸、EVA等水基胶粘剂的特点、合成方法与改性研究进展。对水基胶黏剂在木材加工、包装印刷等领域的应用进展及存在的问题进行了探讨。指出了发展高品质、高性能、功能化、特种化的环保型绿色胶粘剂是胶粘剂行业发展的必然趋势。     

The effect of primers on adhesive properties and strength of adhesive joints made with polyurethane adhesives

The paper presents selected aspects of the effect of primers on adhesive properties and strength of aluminium sheet adhesive joints, made using polyurethane adhesives. The strength of adhesive joints was determined based on two cure time variants: 15 and 64 h. It was found that the longer cure time at a humidity of 33% is more desired, as it leads to a substantial increase in strength of the tested adhesive joints. In addition, two variants of surface preparation were applied: degreasing and degreasing followed by the application of a primer (a pro-adhesive agent). It was observed that the primer application prior to the application of an adhesive leads to a significant increase in strength compared to the variant where the adhesive application is preceded only by degreasing. Moreover, the aluminium sheet surface that was subjected to cataphoretic painting and priming exhibits better adhesive properties. It has a higher value of both surface free energy and its dispersion and polar components compared to the surface that was only subjected to degreasing.     

80℃固化高剥离环氧树脂胶粘剂

介绍了一种８０℃固化高剥离环氧树脂胶粘剂,用于金属,非金属粘接,具有较高的剪切及剥离强度和综合性能。     

聚酯型胶粘剂的成分分析

高温碱性条件下,利用化学降解方法将高分子化合物分离成小分子化合物。采用红外光谱分析和质谱法,对各组分傅立叶变换红外光谱和色谱/质谱联用的分析谱图进行解析,确定了胶粘剂中高聚物和助剂成分。结果表明,该胶粘剂是以聚酯型聚氨酯为黏合剂、炭黑为粉末填料的聚酯型胶粘剂。     

高速商标胶的研制

介绍了一种新型改性的淀粉胶粘剂的制备方法，由淀粉氧化、交联而成，该胶适用于啤酒生产线的高速贴标，它具有好的粘度稳定性和低温贮存稳定性，高固含量，不霉变，成本低等优点。     

热熔型纸塑复合预涂膜的研制

以EVA弹性体为主体材料,配以适宜的增粘树脂及其他助剂,制成热熔胶粘剂并涂于BOPP或聚酯膜上,用于纸塑复合。讨论了各种基料对热熔胶软化点、熔融粘度的影响。该预涂膜性能优良,无毒无污染,复合工艺简单,可提高生产效率。