RTM工艺用室温可固化环氧树脂体系性能研究

选取了三种低黏度且可以室温固化的环氧树脂体系:QC350A/B,1564/HY3487,EV6620/HVC188,表征了树脂体系的流变性能、室温固化固化度及固化物弯曲性能。结果表明:三种环氧树脂体系在20~50℃有适于树脂传递模塑(RTM)工艺的低黏度操作平台;室温固化2周内固化度可达到90%,可以完成室温固化;室温固化21 d弯曲强度与高温后处理试样相当,弯曲弹性模量优于高温后处理试样,室温固化能够满足使用性能要求。     

室温固化耐热环氧胶粘剂的研究进展与发展趋势

综述了室温固化耐热环氧树脂(EP)胶粘剂的研究进展与发展趋势,介绍了近年来国内外部分性能优异的室温固化耐热EP胶粘剂,指出室温固化耐热EP胶粘剂的发展趋势是耐高温、高强度、高耐久性及快速固化。     

信息

室温固化高强结构胶粘剂黑龙江省科学院石油化学研究院在航空航天用室温固化高强度胶粘剂J-133的基础上,采用丙烯酸增韧环氧树脂为主体树脂,改性聚醚胺作为室温固化剂,辅以适量的偶联剂、促进剂、触变剂等,研制出适宜工业化使用的J-133B(AE)室温固化结构胶粘剂。根据固化和使用     

室温固化丙烯酸涂料

室温固化丙烯酸涂料最近涂装和修补卡车和汽车用涂料大多含有异氰酸酯，可室温固化，也具有优良物性（如光泽、硬度、耐候性、附着力、抗碎落等）。希望有一种室温固化涂料不含异氰酸酯，又具有上述优良物性。美国专利４５２９７６５报道的室温固化丙烯酸涂料符合上述要求...     

国内动态

▲室温快固化耐高温环氧胶粘剂在成都有机硅研究中心研制成功国家“七五”科技攻关项目室温快固化耐高温环氧胶粘剂已研制了七个品种的双组份型环氧胶,具有室温固化快(最快的5分钟可固化)、     

不饱和聚酯树脂室温固化体系研究进展

概述了不饱和聚酯树脂室温固化用氧化还原引发体系中引发剂、促进剂的种类和特点,并介绍了近年来不饱和聚酯树脂室温固化体系及其反应动力学的研究进展,旨在使人们对室温固化体系及其应用有一定的认识和了解。     

室温固化环氧胶粘剂的研究现状与发展趋势

本文综述了双组分室温固化环氧树脂胶粘剂的发展过程与研究现状，介绍了近年来国内外几种性能优异的室温固化环氧胶粘剂，指出双组分室温固化型环氧胶的发展趋势是耐高温、高强度、高耐久性及快速固化。     

橡胶室温固化修补胶开发成功

北京大学和北京新轮新特机电技术有限公司研制出橡胶制品室温固化修补胶。该产品侧重于输送带的现场快速修复 ,也可用于石油钻采设备中气囊的快速修补。其热熔型胶修补后2 0ｍｉｎ即可室温固化 ,双组分室温型胶 3～ 4ｈ基本固化。该产品使用可靠、修补方便 ,可缩短停机修补时间 ,延长输送带使用寿命橡胶室温固化修补胶开发成功     

室温固化环氧结构胶粘剂的现状及发展

本文描述了室温固化环氧树脂结构胶粘剂的历史和四个发展阶段。通过近年来国外一些公司生产的一些室温固化环氧树脂结构胶粘剂性能的分析指出今后室温固化型环氧树脂结构胶粘剂的发展方向是耐高温、高强度和缩短固化时间。     

室温快速固化羟甲基环氧树脂—硫脲己二胺体系的研究

本文介绍室温快速固化的羟甲基环氧树脂、硫脲己二胺体系的合成工艺、性能及室温快速固化粘结剂的应用。     

室温固化耐高温环氧树脂胶粘剂的研究进展

环氧树脂(EP)胶粘剂具有优异的粘接性能和化学稳定性因而获得广泛应用,现代工业的发展要求EP胶粘剂兼具室温固化和耐受高温的能力.本文对室温固化耐高温EP胶粘剂的研究进展进行综述,介绍了近年来国内外部分性能优良的EP胶粘剂,并对其发展前景进行展望.     

Anaerobic Adhesive Cure Mechanism-I

Anaerobic adhesives are single-component acrylic adhesives which cure rapidly at or below room temperature when air is excluded, but they remain in an uncured stage over a long time when they are exposed to an adequate supply of air. Thus, anaerobic adhesives are widely used in retaining compounds for nuts and bolts, in sealants, and for impregnation. Recently, anaerobic adhesives have also been used in electrical and electronic applications because of their fast room temperature cure capability and their convenience.¹     

Anaerobic Adhesive Cure Mechanism-II

Anaerobic adhesives are single-component acrylic adhesives which cure rapidly at or below room temperature when air is excluded, but they remain in an uncured stage over a long time when they are exposed to an adequate supply of air. Thus, anaerobic adhesives are widely used in retaining compounds for nuts and bolts, in sealants, and for impregnation. Recently, anaerobic adhesives have also been used in electrical and electronic applications because of their fast room temperature cure capability and their convenience.     

Anaerobic Adhesive Cure Mechanism-I

Anaerobic adhesives are single-component acrylic adhesives which cure rapidly at or below room temperature when air is excluded, but they remain in an uncured stage over a long time when they are exposed to an adequate supply of air. Thus, anaerobic adhesives are widely used in retaining compounds for nuts and bolts, in sealants, and for impregnation. Recently, anaerobic adhesives have also been used in electrical and electronic applications because of their fast room temperature cure capability and their convenience.¹     

中温潜伏性固化剂在环氧胶黏剂中的研究进展

在环氧胶黏剂体系中,中温潜伏性固化剂以其优异的潜伏性和相对较低的固化温度而成为研究热点,符合当下提倡的绿色、环保、"低碳生活"理念。详细介绍了双氰胺、咪唑、酸酐、有机酰肼、BF3-胺络合物、微胶囊六种中温潜伏性固化剂及其改性方法。它们的改性方法主要是:通过改性活化或者加入活性促进剂降低双氰胺、酸酐、有机酰肼等高温固化剂的固化温度;通过改性钝化咪唑的固化活性,延长室温储存期;将BF3等路易斯酸室温固化的固化剂与胺络合降低其固化活性,提高室温储存期;将活性固化剂用壁材包裹形成微胶囊使其在室温时稳定,较高的温度时壁材破裂释放出活性固化剂,迅速固化。     

碳纤维布浸胶及与钢粘接用胶的性能研究

研究了用以浸碳纤维布的环氧胶及粘接浸胶碳布与钢的胶粘剂组成及粘接性能。发现高温性能主要取决于浸碳布胶,室温性能较好的胶,高温性能则明显偏低。制成了室温～250℃剪切强度都在10MPa以上,300℃为8～9MPa的浸碳布胶和粘接用胶。该胶具有不燃性、无烟,以及优异的耐烧蚀性能。     

Preparation and performance of urethane-modified polytriazole adhesives

Polytriazole adhesives are a new type of adhesives with excellent heat resistance, but the lap shear strength at room temperature is not ideal, which is about 15 MPa. In order to improve its adhesion performance at room temperature, a series of urethane-modified polytriazole (UPTA) adhesives were successfully synthesized via 1, 3-dipolar cycloaddition reaction between azides, and alkynes. Firstly, an alkynyl-terminated urethane monomer di(but-3-yn-1-yl) (1,3-phenylenebis(methylene)) dicarbamate (DBPMD) was synthesized and characterized. Then DBPMD was reacted with biphenyl dibenzyl azide (BPDBA) and N′,N′,N′,N′-tetrapropargyl-p,p′-diaminodiphenyl methane (TPDDM) to prepare UPTA adhesives. Curing behavior, thermal properties, bonding performance, and resistance to damp heat aging of UPTA adhesives were studied. The results show that the introduction of urethane group has almost no effect on the curing behavior. The glass transition temperature (T_g) and the 5% thermal weight loss temperature (T_d5) gradually decreased with the increased proportion of DBPMD added. T_g of UPTA adhesives ranged from 185 to 215°C and T_d5 of UPTA adhesives were all above 300°C, which indicated its outstanding thermal stability. The lap shear strength at room temperature of UPTA adhesives increased first and then decreased with the increasing amount of DBPMD, which ranged from 13.9 to 19.9 MPa. The highest lap shear strength of UPTA adhesives can reach 19.9 MPa, which was 31.8% higher than PTA adhesive. The lap shear strength retention rate of UPTA adhesives at 180°C was all over 75%. Lap shear strength retention rate of UPTA adhesives under 168 h damp heat aging time was all over 80%. UPTA adhesives have good bonding performance, heat resistance, and damp heat aging resistance, which can meet many complex construction requirements.     

耐高温胶粘剂研究进展

综述了国内外耐高温胶粘剂的发展概况,对环氧树脂(EP)、聚酰亚胺(PI)、酚醛树脂(PF)、聚氨酯(PU)等耐高温有机胶粘剂和磷酸盐、硅酸盐等耐高温无机胶粘剂的合成和改性研究现状作了详细论述,并对今后耐高温胶粘剂的发展趋势进行了展望。     

端胺基液体丁腈橡胶增韧环氧胶黏剂的研究概况

介绍了端胺基液体丁腈橡胶（ATBN）增韧改性环氧胶黏剂的研究概况。由于端胺基液体丁腈橡胶具有活性端胺基,与环氧基在室温下即可进行化学键合,省略了通常的橡胶-树脂预聚合工艺,是一种性能优良的环氧树脂增韧剂。