高固体分酚醛环氧涂料的研究和设计

以液体酚醛环氧树脂为主基料树脂,脂肪酸改性环氧树脂为辅助基料树脂;以改性芳香胺、改性脂环胺、腰果壳油改性酚醛胺为固化剂制备了高固体分酚醛环氧涂料,该产品能够适用于更苛刻的腐蚀环境。还研究了不同固化剂及当量比对涂层物理化学性能的影响,并展望了该产品的应用前景。     

聚酰胺与腰果酚改性胺环氧固化剂的耐黄变性能比较

E-20环氧树脂分别与聚酰胺树脂和腰果酚改性酚醛胺固化,将漆膜曝晒,检测色差;用紫外线照射,检测漆膜性能。发现腰果酚改性酚醛胺比聚酰胺使环氧漆膜变黄的速率要快,紫外线对前者颜色影响更大,因而聚酰胺适合于作环氧面漆固化剂,腰果酚改性酚醛胺适合于作环氧底漆固化剂。     

环氧树脂胶粘剂的耐热改性研究进展

介绍和评述了环氧树脂胶粘剂耐热和增韧改性的若干体系,如高官能度环氧、环氧-酚醛、环氧-丁腈、环氧-芳胺、环氧-芳胺-双亚胺、环氧-链烯基酚-双亚胺、环氧-双羟、羧亚胺、环氧-聚酰亚胺和环氧-氰酸酯等的研究和应用情况。     

耐化学品涂料对硫酸、盐酸、硝酸和乙酸的耐受性研究

介绍了硫酸、盐酸、硝酸、乙酸的腐蚀概况及常用的防腐方法。考察了6种涂料对不同浓度酸液的耐受性。研究发现环氧涂料对酸耐受性较差,3种酚醛涂料对不同酸的耐受性有所差别,聚环胺固化的环氧酚醛涂料比环氧及其他环氧酚醛涂料可耐更高浓度的硫酸和盐酸。乙烯基酯玻璃鳞片涂料和酚醛乙烯基酯玻璃鳞片涂料对酸的耐受性较好。同时,随着酸液浓度增大,涂料最高耐受温度有所降低。高交联密度环氧酚醛涂料比环氧酚醛涂料对酸液有更优异的耐温性能,酚醛乙烯基酯玻璃鳞片涂料比乙烯基酯玻璃鳞片涂料对酸液有更优异的耐温性能。同时介绍了一个98%浓硫酸地坪的案例和一个37%浓盐酸碳钢储罐的案例。     

YAG掺铷——钇铝石榴石激光晶体胶粘剂

YAG掺铷——钇铝石榴石激光晶体胶粘剂以丁腈改性环氧树脂,酚醛变性胺为固化剂,用于掺铷——钇铝石榴石激光晶体与钢套粘接,安装在陕西省人民医院YAG激光医用治疗机,临床应用3年,效果很好。后中国电子科技集团第二十七研究所从1990年开始用YAG激光胶粘剂粘接各类激光产品至今,经高低温试验、振动试验、冲击试验等各项性能测试及15年来工程应用证明,在各类激光产品中从未出现开裂、脱胶现象,性能稳定可靠,其粘接强度、耐冲击、耐振动、耐高低温变化、耐水、耐化学介质、耐光、耐老化性能均好,能满足生产要求,用途广泛,符合激光及各种工程应用。文中详述了酚醛变性胺固化剂的选择及该胶粘剂的性能。     

环氧建筑结构胶固化速度的调整

在建筑结构加固领域用环氧树脂中,选一种高活性酚醛胺固化剂HD—SG和一种低活性改性芳香胺固化剂HD—MG,通过调整HD-SG／HD—MG的质量比,可以得到不同活性的环氧树脂固化剂,并对固化物力学性能进行研究。     

酚醛改性脂肪胺环氧树脂固化剂的性能研究

用酚醛改性脂肪胺(乙二胺、二乙烯三胺)与聚醚胺作为混合固化剂固化环氧树脂,研究了聚醚胺的用量对环氧树脂凝胶时间、冲击韧性以及粘接性能的影响;并通过测试钢-钢拉剪强度研究了此结构胶粘剂的耐湿热老化性能。实验结果表明,随着聚醚胺用量的增加,环氧树脂固化体系的凝胶时间增长,树脂浇铸体的冲击韧性明显提高,粘接强度先提高再降低,最高值达到16.2 MPa;随着湿热老化时间的增加,环氧树脂固化体系的粘接性能逐渐降低。     

酚醛胺(T-31)环氧树脂固化剂的应用与发展综述

本文介绍了酚醛胺（T-31）系列环氧固化剂的应用及原料的现状和特点,阐述了三代酚醛胺（T-31）系列环氧固化剂的系列化、专用化、高档化.并对酚醛胺（T-31）系列环氧固化剂的需求和发展方向进行了预测和展望.     

芳香胺类固化剂与环氧树脂的固化行为研究

研究了几种不同芳香胺固化剂与环氧树脂的固化性能,确定一种可用于覆铜板的芳香胺固化剂。通过凝胶化实验和DSC扫描的方式测试几种芳香胺类固化剂的反应活性,并测试了树脂浇铸体的介电性能。结果表明,MOCA固化剂综合性能优异,Ethacure100固化剂工艺性能优良,DDS固化剂固化温度比较高,使用起来相对比较困难。最后,选用Ethacure100固化剂固化酚醛环氧树脂,制备覆铜箔层压板(CCL),并测试板材的基本性能。     

酚醛纤维的研究进展及应用

综述了国内外酚醛纤维的研究发展情况;介绍了酚醛纤维在阻燃、增强、耐烧蚀绝热材料、抗菌、制备酚醛基碳纤维以及酚醛基活性炭纤维等方面的应用;指出加快发展我国酚醛纤维产品的必要性,各种高性能、功能化酚醛纤维、酚醛基碳纤维以及酚醛基活性炭纤维将是未来研究开发的重点。     

Characterization of epoxy coatings on steel by reflection/absorption fourier transform infrared spectroscopy. I. Effects of film thickness and angle of incidence

Films of amine-cured epoxy coating of varying thicknesses from 100 Å to 2.5 μm on steel have been studied by reflection/absorption Fourier transform infrared spectroscopy (FTIR-RA). The shape and frequency of several strongly absorbed bands of epoxy have been examined as a function of film thickness and angle of incidence. Compared to transmission spectra, reflection/absorption spectra of epoxy coating on steel show band shifts and distortions of the bands at 1510, 1247, and 1040 cm^?1. These effects are more pronounced at increased thickness and at grazing angles. For thin films ( < 100 nm), RA spectral intensity increases with increasing angle of incidence. For thicker films, the relationship is quite complex. The relationship between film thickness and FTIR-RA spectral peak height of an amine-cured epoxy coating on steel has also been established.     

固化剂对环氧玻璃鳞片涂层性能的影响

以双酚A环氧树脂(E20)为主要成膜物,层片状玻璃鳞片和云母氧化铁为主要填料,辅助以铝粉、氧化铁红颜料,以及各种助剂和溶剂,再分别加入固化剂脂肪族胺加成物、聚酰胺TY-650,制得高固体分厚浆型环氧玻璃鳞片涂料。通过常规的力学性能(涂层的硬度、耐冲击性、柔韧性、附着力等)和耐腐蚀性测试,对比了不同固化剂对环氧玻璃鳞片涂层性能的影响。研究结果表明,脂肪族胺加成物与环氧树脂交联固化的玻璃鳞片涂层的硬度、附着力以及交流阻抗值都较高,具有良好的综合性能,加入铝粉对基体可起到阴极保护作用。     

无溶剂环氧玻璃鳞片涂料的研制

EP-9402无溶剂环氧玻璃鳞片涂料是一种由苯基缩水甘油醚、环氧树脂同混合固化剂反应的高分子网状结构为主要成膜物的双组分常温固化涂料,该涂料通过添加经偶合处理的一定粒径的片状鳞片实现涂层优异的耐化学介质性和附着性,涂料无挥发性溶剂、气味小,安全环保。本文介绍了该涂料的配方研制和制造过程、性能指标以及现场应用情况。     

环氧玻璃鳞片长效防腐涂料的制备

研制了一种环氧玻璃鳞片长效防腐涂料,玻璃鳞片经复合硅烷处理剂处理后,其用量在20％～30％时,涂层的防护效果最佳。盐雾试验4000h,湿热试验3000h,涂层无变化,具有优异的防腐性能,可用于海洋平台、石油化工等重防腐领域。     

Influence of intramolecular specific interactions on phase behavior of epoxy resin and poly(ε-caprolactone) blends cured with aromatic amines

Two aromatic amines were used as the curing agents to prepare the thermosetting blends of epoxy and poly(ε-caprolactone) (PCL). When cured with 4,4′-methylenebis(2-chloroaniline) (MOCA), the thermosetting blends are miscible in the amorphous state in the entire composition, which was evidenced by the behavior of single, and composition-dependent glass transition temperatures (T_g's) in terms of thermal analysis. Fourier transform infrared spectroscopy (FTIR) showed that there are the intermolecular specific interactions (viz. hydrogen bonding) between the component polymers. However, the 4,4′-diaminodiphenylsulfone (DDS)-cured epoxy forms the immiscible blends with PCL. The blends displayed a typical reaction-induced phase separation morphology. The phase behavior seems to be more than the expected since it was ever proposed that there would be the intermolecular specific interactions between amine-cured epoxy and PCL, which would fulfill the miscibility of the systems. To interpret the phase behavior, we investigated that the miscibility and intermolecular specific interactions in the blends of model compounds and linear homologues of epoxy with PCL. It was observed that in MOCA-cured blends there were much stronger intermolecular specific interactions than in DDS-cured counterparts. The weaker intermolecular specific interactions between DDS-cured epoxy and PCL resulted from the formation of the intramolecular hydrogen bonding interactions within DDS-crosslinked epoxy, which were involved with the sulfonyl groups and the secondary hydroxyls. The intramolecular association could suppress the formation of the strong intermolecular hydrogen bonding interactions between carbonyls and hydroxyls of amine-cured epoxy, which are sufficient to fulfill the homogenization of the system during the in situ polymerization. Therefore, the presence of the intramolecular specific interactions between sulfonyl and hydroxyl groups was taken as the origin of phase-separated morphology for DDS-cured blends of epoxy with PCL.     

PHASE-SEPARATION BEHAVIOR IN POLY(ETHER IMIDE)-MODIFIED EPOXY BLENDS

Phase-separation behavior of aromatic amine-cured diglycidyl ether of bisphenol-A (DGEBA) epoxy oligomer and poly(ether imide) (PEI) engineering thermoplastic-modifier mixtures was investigated by means of small-angle light scattering (SALS) and optical microscopy. The starting reactant mixtures comprising epoxy, PEI, and the curing agents, namely diamino diphenyl sulfone (DDS) and methylene dianiline (MDA), were found to be single phase. During curing, phase separation occurred in the epoxy/PEI/DDS system, whereas no phase separation took place in MDA-cured epoxy/PEI blends. The difference between the two systems has been attributed to thermodynamic and kinetic aspects of cure reaction in thermoplastic-modified thermosetting (TMT) polymeric blends. Spinodal decomposition as characterized by an increase of scattered intensity, shift of the peak angle to a smaller scattering angle, and development of a regularly phase-separated structure followed by coarsening was found to be the dominant mechanism of reaction-induced phase separation in DDS-cured epoxy/PEI blend compositions.     

用于蒸馏水舱防护的新型玻璃鳞片涂料研制

舰艇蒸馏水舱内壁主要使用环氧聚酰胺类涂料作为防护涂层,防止舱壁腐蚀,防护期限一般为5年左右。但这类涂料不仅防护期效短,而且在使用过程中涂膜易产生起泡、脱落。以硅氧烷包覆过的片状玻璃鳞片为主要防锈涂料,以低黏度环氧树脂为基料,制备了一种新型高固体份环氧玻璃鳞片涂料。实验表明,该涂料耐中性盐雾试验可达3000h以上;常温条件下,在蒸馏水浸泡环境中,涂膜的有效防护期可达15年以上;并且经长期的蒸馏水浸泡、侵蚀,漆膜不会有可溶物质溶出,不会影响存储的蒸馏水水质,非常适合于长时间存储高纯度蒸馏水的水柜、水罐等设备的内壁防护需要,可有效满足舰艇、电厂等对蒸馏水存储设施的防腐要求。     

The mechanism of the thermal degradation of aromatic amine-cured glycidyl ether-type epoxide resins

A mechanism is proposed for the thermal degradation of aromatic amine-cured glycidyl ether-type epoxide resins which is based on the results of previous work in this field. The significance of the degradation mechanism to the thermal stability of aliphatic amine-cured epoxides and aromatic amine-cured cycloaliphatic epoxides is discussed.     

Relationship between chemical degradation and thickness loss of an amine-cured epoxy coating exposed to different UV environments

The relationship between chemical degradation and thickness loss of an unpigmented, non UV-stabilized, crosslinked amine-cured epoxy coating exposed to three UV conditions was investigated. Spin-coated samples having a thickness of approximately 7 μm on an Si substrate were prepared from a stochiometric mixture of a bisphenol A epoxy resin and a tetra-functional amine curing agent. Samples were exposed outdoors and to two accelerated laboratory UV environments. Chemical degradation and thickness loss were measured by transmission Fourier transform infrared spectroscopy (FTIRS) and laser scanning confocal microscopy (LSCM), respectively. In addition, surface roughness and morphological changes were measured by atomic forcemicrosocopy (AFM) and LSCM. Substantial chemical degradation, thickness loss, and morpholocal changes occurred in the exposed films, and the rate of chemical degradation was greater than that due to the thickness loss. This additional chemical loss was attributed to an inhomogeneous degradation process in which nanoscale localized depressions initiate at certain sites on the surface, which then enlarge and deepen with exposure time. The results of this study provide a better understanding of the degradation mechanism and should lead to the development of scientific-based models for predicting the service life of crosslinked amine-cured epoxy coatings. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL     

高性能玻璃鳞片防腐涂料的研制

采用偶联剂处理玻璃鳞片等方法,研制了高固体分环氧改性聚氨酯玻璃鳞片防腐涂料,优于普通防腐涂料,适用于油气田、化工设备等苛刻腐蚀环境的防腐,尤其适用于输油管道和原油贮罐的内壁防腐。介绍了该高性能防腐涂料所用的原料、制备工艺和性能指标。讨论了涂料的溶剂体系、玻璃鳞片片径、偶联剂、颜填料、助剂等的选用。