多硫醇快速固化剂的合成

为促进硫醇固化剂的国产化,对其制备方法进行了研究。将聚醚与环氧氯丙烷在四氯化锡催化下加热反应生成中间体(PCE),PCE与硫氢化钠或硫脲等亲核试剂发生亲核取代反应,合成多硫醇固化剂。该固化剂与环氧树脂按质量比1∶1混合,5 min快固化胶的钢-钢剪强度(常温)>18 MPa,水下浸泡7 d后剪切强度为8.5 MPa。     

聚硫醇固化剂生产工艺及应用分析

聚硫醇常用作环氧树脂低温或室温固化剂以及不饱和树脂紫外光交联剂。本文综述了国内外聚硫醇固化剂主要生产企业的产品结构、性能、应用领域及生产工艺。从市场需求角度分析了这些产品的特性及其在胶粘剂、涂料和油墨等领域中的应用。     

自乳化水性环氧固化剂的合成与性能

在三乙烯四胺(TETA)的分子链段上通过加成、扩链,将亲水性多乙烯多胺改性成为既亲水又亲油的两亲性化合物,再经封端工艺合成了自乳化水性环氧树脂固化剂,该固化剂兼具乳化和固化功能。实验研究了固化剂的合成工艺及漆膜各项性能,结果表明,所合成的自乳化水性环氧固化剂具有良好的乳化环氧树脂的功能,所制备的水性环氧树脂涂膜具有良好的铅笔硬度、耐冲击性、附着力、耐水和耐化学品性,且适用期较长。     

1,2—双（2—乙氧基硫醇）乙烷的合成研究

本文报导了由三甘醇和亚硫酰氯反应合成二氯三甘醇以及由二氯三甘醇和硫化钠反应合成１,２－双（２－乙氧基硫醇）乙烷的方法,并讨论了原料配比,反应温度,溶剂,滴加速度对反应过程和产物收率的影响。     

新型环氧固化剂的合成与研究

合成一系列二乙烯三胺和三乙烯四胺与三种丙烯酸酯加成物——新型环氧固化剂，采用红外光谱法证实了反应主要发生在丙烯酸酯的双键与多乙烯多胺的氨基上；并对固化后环氧树脂的冲击强度和剪切强度进行了测定，结果表明：环氧树脂的抗冲性能及粘接性能均有所改善。     

新型环氧固化剂的合成及性能研究

简要介绍了新型环氧固化剂的合成工艺，并对产品主要性能进行了研究，解决了低分子胺类环氧固化剂无法在水中、低温环境中交联固化的问题，扩大了环氧树脂的应用范围及领域。     

桐油合成环氧树脂固化剂

本文概述叙述了桐油合成环氧树脂固化剂的几种合成方法和性能特点。     

对甲苯胺改性双氰胺衍生物潜伏性固化剂的合成及性能

合成了一种新型的环氧树脂潜伏性固化剂——对甲苯胺改性的双氰胺衍生物，讨论了反应条件对合成的影响，并通过熔点测定、IR、^1H NMR对其结构进行了表征。初步固化实验结果表明，这种环氧树脂潜伏性固化剂具有较好的固化性能。     

糠硫醇合成的研究

糠硫醇是重要的具有咖啡香味的合成香料,本文对其合成方法进行了研究,反应周期缩短了12h,产率达到60.3％。     

硫醇胺环氧固化剂

Gabriel Performance Products在市场上推出2种硫醇胺环氧固化剂GPM-830CB和GPM-890CB,设计满足特殊的凝胶／固化时间要求。在普通的环氧树脂胶粘剂配方中,这些固化剂可提高玻璃和金属特别是黄铜和青铜问的粘接力。GPM-830CB是一种中等粘度,黄褐色液体,其与标准的双酚A液态环氧树脂的凝胶时间为30min。     

含氟环氧固化剂——全氟壬烯氧基邻苯二甲酸酐的合成

本文通过全氟丙烯三聚体与4-羟基邻苯二甲酸反应合成了一种新的环氧树脂固化剂全氟壬烯氧基邻苯二甲酸酐,并介绍了环氧树脂以其固化的优点。     

环氧固化剂硫脲改性四乙烯五胺的合成及性能研究

用硫脲改性四乙烯五胺合成了环氧树脂固化剂。通过测量初凝时间和接触角,讨论了反应时间、合成温度和单体投料比对固化剂性能的影响。通过热效应法考查了固化剂与环氧树脂的最佳配比。实验结果表明,反应时间为3 h,反应温度为130℃,四乙烯五胺与硫脲的质量比为1.4∶1时,合成的固化剂较好。当m固化剂∶m环氧=1∶4时,胶粘剂能在-5℃/8 d内固化,有效提高固化体系在低温下的固化能力。     

环氧/多巯基型无色透明胶粘剂的研制

采用自制多巯基固化剂与E-51环氧树脂制备了一种环氧/多巯基型无色透明胶粘剂,对其拉伸剪切强度、黏度、紫外-可见光透过率等性能进行了研究,并在相同条件下与使用进口固化剂的胶粘剂性能进行了对比。结果表明,随着固化温度升高,2种胶粘剂拉伸剪切强度均不断提高,在固化温度达到110℃时拉伸剪切强度均达到最大,随后开始下降。随温度升高,2种胶粘剂黏度均不断下降。紫外-可见光透过率的测试表明,固化温度对进口胶粘剂的透明度影响很大,80℃透过率就明显下降。固化温度在80℃内,自制胶粘剂的紫外-可见光透过率变化不大。在此环氧体系中,使用自制固化剂的胶粘剂在耐温性方面具有一定优势。     

多胺-环氧体系中固化剂特征用量分析

对由环氧胶体型缩聚理论得到的固化剂特征用量进行了分析,发现第一峰值用量W1、等当量用量W0的理论值和实验值符合很好,而对于第二峰值用量W2,理论值大于实验值。对其原因进行了分析。     

Phosphaphenanthrene‐containing borate ester as a latent hardener and flame retardant for epoxy resin

Borate ester containing the phosphaphenanthrene group with N → B coordination structure (PBN) was synthesized by transesterification of tributyl borate, 2‐(6‐oxido‐6H‐dibenz?c,e??1,2?oxaphos‐phorin‐6‐yl) methanol and N,N‐dimethylethanolamine. A thermally latent curing utility for diglycidyl ether of bisphenol A epoxy resin (E51) was confirmed by differential scanning calorimetry. Additionally, its flame‐retarding function in the cured epoxy was demonstrated in terms of the limiting oxygen index (LOI) and vertical burning test. The cured epoxy with 100:20 mass ratio of E51 to PBN passed UL94 V‐0 rating with 34.3% of LOI. The flame retardation mode and thermal and mechanical properties of the cured epoxy were carefully evaluated. The results of this work suggest that application of PBN would permit the formulation of environmentally friendly one‐pot flame‐retardant epoxy resin. © 2015 Society of Chemical Industry     

聚醚型水性环氧树脂固化剂的合成

采用多乙烯多胺与低分子质量环氧树脂反应,并在其中引入聚醚和环氧树脂CYD-128合成的CYD-128改性聚醚链段,合成聚醚型水性固化剂,实验表明工艺可行。对CYD-128改性聚醚合成过程中各影响因素进行了研究,并对聚醚水性固化剂固化性能进行了评价。最佳配方与工艺为:选择分子质量为1 500的聚醚,环氧树脂与聚醚物质的量比为2∶1,催化剂选用BF3(60℃时加入)。与现有文献中报道的固化物性能相比,水性固化剂固化环氧体系的的柔韧性和附着力有大幅提高,硬度、光泽度和强度改变不大。     

Effects of composition of hardener on the curing and aging for an epoxy resin system

Different mixture ratios of Shell Epon 828 (based on diglycidyl ether of bisphenol A, DGEBA) and Shell EPI‐CURE 3046 (based on triethylenetetramine, TETA) were evaluated under different environments of isothermal curing at 80°C in DSC, room temperature curing in air, and aging in water at 45°C. The curing reactions were monitored using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and infrared spectroscopy (IR). It was shown that the initial curing rate increased with the amount of hardener. However, the epoxy groups in samples with excess hardener were prone to reaction with primary amines located at the ends of TETA molecules, resulting in a less dense epoxy network. During aging in water at 45°C, significant effects of water on the postcure and the increased water absorption with an increase of hardener amount were observed. The DMA results show that the samples with hardener around stoichiometric composition have the greatest storage modulus while curing in air environment. However, the samples with hardener much less than stoichiometric composition have greater storage modulus under aging in water at 45°C. in water at 45°C. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 580–588, 2006     

环氧胶多胺固化剂第二峰值用量的修正

由环氧胶体型缩聚理论得到的固化剂第二峰值用量W2总大于实验值。本文对其进行了修正,修正后的理论值与实验值比较接近。     

Investigation of the reaction mechanism of different epoxy resins using a phosphorus‐based hardener

In this work, the fundamental kinetic and structure/property information for a novel phosphorus‐based hardener, bis(4‐aminophenoxy) phosphonate is cured with a range of common epoxy resins such as diglycidyl ether of bisphenol A, tri glycidyl p‐amino phenol and tetra glycidyl diamino diphenyl methane (TGDDM) at various cure temperatures. The rate coefficients k₁ and k₂ for the primary and secondary amine epoxide addition reactions, respectively, were determined and were found to exhibit a positive substitution effect for the TGAP and TGDDM epoxy resins. Etherification or internal cyclization were shown to be important at higher levels of cure conversion, with these reactions being more significant for the TGAP/BAPP system. Some basic structure/property relationships were established between the glass transition temperature (T_g) and epoxide conversion. The master curve obtained for the superimposition of the various cure temperatures for each epoxy demonstrated the independence of the cure mechanism with temperature. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 99:3288–3299, 2006     

高折射率含硫环氧树脂PTETE的合成与表征

以苯硫酚、氯乙醇和环氧氯丙烷为原料,通过直接法合成高折射率苯硫基乙基-2,3环氧1丙硫醚（PTETE）环氧树脂。研究了原料配比、温度和氢氧化钠的用量等因素对产物产率的影响。得出最佳反应条件为：反应温度为0～10℃,环氧氯丙烷、MEPS与NaOH摩尔比为1．25：1：1,产率91．50％,产物的折射率1.6016。并通过FT-IR对合成的原料和产物进行表征。