新型带湿带锈涂料研制及其应用

以双酚A环氧树脂E20作为涂料主要成膜物质,采用X800-1转锈树脂、乙酰丙酮渗透剂、三聚磷酸二氢铝、磷酸锌、氧化锌等稳锈型颜填料为带锈涂装组分,结合腰果酚改性胺环氧带湿固化剂和包含无水乙醇的混合溶剂,研制出可带湿带锈涂装的新型带湿带锈涂料。介绍了该新型带湿带锈涂料的设计原理及其在沿海趸船装备上的应用情况。     

减层聚酯V带带偏问题的解决措施

减层聚酯Ｖ带带偏问题的解决措施郑州市橡胶三厂自１９９１年应用聚酯帘布代替棉、人造丝、维纶帘布制造优质减层Ｖ带以来，通过两年来生产实践，对聚酯帘布Ｖ带常出现的带偏问题进行了系统分析和探讨，找出了如下影响质量的因素和解决措施。影响带偏的因素：①带坯长度比...     

新型带锈带湿带油涂装涂料的研制

为满足某些特殊场所不能进行彻底除锈的需求,以低黏度环氧树脂、自制的改性环氧树脂和具有特殊结构的固化剂为成膜物,选择合适的防锈颜填料、溶剂、助剂,制备了一种能够在含有少量锈、水(湿气)、油的基材表面上使用的长效防腐涂料。对涂层性能进行了测试,分析了涂料性能的影响因素,结果显示:所研制的涂料不仅能够直接在带锈带湿带油的基材表面上进行良好的施工,而且具有长效的防腐性能。     

浅析带锈涂料

论述了带锈涂料的类型和工作机理，阐述了带锈涂料的施工要求及其发展趋势。     

带磨机

带磨机是一种较理想的抛磨设备,目前国外普遍采用手工和完全自动化的带磨机,手工操作的带磨机由马达驱动,通过变速机构带动磨擦轮,磨擦轮带动一种特制的磨带旋转,当工件与磨带接触时,产生磨擦从而起到磨光作用。带磨工艺主要用于电镀后的磨光,表面高精度的精饰。采用磨带加工效率高,表面质量好,磨削量大,完全可以代替在布轮上、毛毡轮上粘结带有磨粒的抛光轮。带磨机由磨带、磨擦轮、拉紧装置、马达、主轴。防护罩、基座等组成。磨带由基体(纺织物)粘合剂(天然的或化学材科)磨粒(氧化铝、碳化硅)组成。磨粒有大小不同的     

全国带轮与带标准化技术委员会批准设立

日前,国家标准化管理委员会正式批准设立全国带轮与带标准化技术委员会,对口国际标准化组织为ISO／TC41——带轮与带技术委员会,负责制修订带轮和带（包括V带、同步带、平型传动带和输送带等）的设计、配合尺寸、试验方法及相应的互换性、质量要求和试验方法国家标准。全国带轮与带标准化技术委员会秘书处设在机械科学研究院中机生产力促进中心。     

钢铁带锈带油带水料的研制

为了省去除锈、除油、干燥等涂漆前处理工序,减轻劳动强度,降低涂装成本,以环氧树脂和聚乙烯醇缩丁醛为成膜物,磷酸-单宁酸为转化液,多品种搭配使用颜料,研制成功了-种钢铁带锈带油带水涂料.探讨了主要成分对铁锈转化能力及涂膜质量的影响.实验结果表明:随着磷酸含量的增加,试片表面的气孔也增加,当磷酸:单宁酸为1:1时,锈转化层和基体结合牢固,而且表面无气孔;环氧树脂和聚乙烯醇缩丁醛的使用比例为1.0:1.8～2.0时,漆膜附着牢固,柔韧性、耐水性好,耐腐蚀性能优良.     

对V带尺寸标准的研究

GB/T 11544-1997《普通V带和窄V带尺寸》标准已实施十多年,在规范国内普通V带和窄V带的尺寸方面起了重要作用,但近年来随着传动工业的发展,传动方式的变化,对传动带尺寸也增加了新的要求,测长用带轮的尺寸也有了新规定。GB/T 11544-1997《普通V带和窄V带尺寸》标准中规定了V带截面尺寸的顶宽、带高和楔角,从而决定了V带的截面,这也是大部分设计人员所习惯的。在V带产品中,尺寸是技术要求的一个主要内容,而V带截面尺寸是V带尺寸中一个基本尺寸,是V带传动系统中一个重要的要素。     

钢铁带锈带油带水涂料的研制

为了省去除锈、除油、干燥等涂漆前处理工序,减轻劳动强度,降低涂装成本,以环氧树脂和聚乙烯醇缩丁醛为成膜物,磷酸-单宁酸为转化液,多品种搭配使用颜料,研制成功了一种钢铁带锈带油带水涂料。探讨了主要成分对铁锈转化能力及涂膜质量的影响。实验结果表明：随着磷酸含量的增加,试片表面的气孔也增加,当磷酸：单宁酸为1：1时,锈转化层和基体结合牢固,而且表面无气孔;环氧树脂和聚乙烯醇缩丁醛的使用比例为1．0：1．8～2．0时,漆膜附着牢固,柔韧性、耐水性好,耐腐蚀性能优良。     

加强型汽车橡胶V带的研制

加强型汽车V带是在原普通汽车V带的基础上,优化了汽车V带的结构,在压缩层增加了织物帘线作为辅助加强层,增强了V带的传动功率,提高了V带的使用寿命。     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

三种煤样燃烧热的测定

本文通过三个厂家提供的三种煤样燃烧热的测定,由测定结果综合得出3号煤样燃烧最完全、燃烧热也最大,是三个煤样中最好的一种。     

Semi-empirical equation of state of metals. Equation of state of aluminum

A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO₂) of density 0.08 g/cm³. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008.     

小议汽车涂装工艺设计对涂装成本的影响

论述了涂装工艺设计对涂装设备投资、涂装生产成本的影响。     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

Measurement of the gradient of viscosity with composition of mixtures of non-ideal gases

A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%.     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out.     

塔设备改造选型的分析

就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后，着重介绍一种新型塔板（导向梯形浮阀塔板）和一种新型填料（波环填料——乾隆帕克）。     

Effect of degree of deacetylation of chitin on the properties of chitin crystallites

In the present article, chitin from crab shell was systematically deacetylated using a NaOH treatment with control of the reaction time. The degree of deacetylation, monitored using solid-state NMR, revealed that the reaction was pseudo-first order. Based on this, swollen and NaOH-saturated particles are proposed as the reaction system. The weight loss of the partially saponified and neutralized samples after HCl hydrolysis increased linearly with the degree of deacetylation. The crystallinity of the samples was found to increase after acid hydrolysis. According to conductimetric titration, the surface charge density of the crystallites, after acid hydrolysis, was found to increase with base treatment time. The effect of surface charge on the formation of a chiral nematic phase, due to the rodlike nature of the crystallites, was explored. These results show that because the contribution of charged particles to the ionic strength was significant the double layer compression was affected, especially since the surface charge density was close to the Manning limit. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:373–380, 1997