卷材涂料的研究进展

综述了卷材涂料的发展状况,结合卷材涂料的分类介绍了聚酯型卷材涂料。环氧树脂型卷材涂料、丙烯酸型卷材涂料、复配型卷材涂料的性能和特点,着重介绍了聚氯酯型卷材涂料,并对今后为发展趋势进行了展望。     

卷材涂料状况浅析

本文简述了卷材涂料的品种及性能，介绍了我国卷材涂料的发展现状及涂装生产线的状况，并对卷材涂料的发展提出了自己的看法。     

卷材涂料用树脂

卷材涂料是我国涂料家族中的后起之秀，虽有20年的历史，但快速发展不过最近五六年时间，也是目前工业漆中发展最快的品种之一，它是金属板材预涂的组成之一，用于涂覆钢板、铝板表面，制成预涂卷材之后使用的一种专用涂料。陈德刚先生在中介绍了目前卷材涂料的基本体系和常用树脂体系的性能及测试方法，展望了卷材涂料的前景。     

卷材涂料的应用及其色彩效应

本文叙述了我国卷材涂料的一些情况，着重介绍了上海振华造漆厂生产的卷材涂料的应用。     

卷材涂料用树脂

卷材涂料是目前工业漆中发展最快的品种之一，简要地介绍了目前卷材涂料的基本体系和常用树脂体系的性能及测试方法，展望了卷材涂料的前景。     

家电卷材涂料的应用与研究

研究了家电卷材涂料的实际应用情况,从原料选择开始按照家电卷材涂料的性能标准,包括RoHS(电子电气设备中限制使用某些有害物质指令)环保指令要求来设计配方,选用钙离子交换二氧化硅作为环保防锈颜料,分析并讨论了底漆和面漆组分对涂料物理性能和防腐蚀性能的影响。实验结果表明:影响家电卷材涂料物理性能的主要因素是面漆中聚酯树脂和氨基树脂的配比,以及酸催化剂的用量;影响家电卷材涂料防腐蚀性能的主要因素是底漆中防锈颜料的添加比例。     

锐态型钛白粉在卷材涂料中的应用性问题分析与改进措施

国内的卷材涂料多数采用金红石型钛白粉，但由于金红石型钛白粉价格昂贵，且国内生产产量有限，这样便得锐态型钛白粉在卷材涂料中的应用有一定的潜力和前景。本文作者金斌先生从卷材涂料的性能和组成出发，讨论了钛白粉在涂料中的作用，分析了锐态型钛白粉质量指标在卷材涂料中应用性受限制的原因，提出一系列改进措施，来达到锐态型钛白粉在卷材涂料中广泛应用的目的。     

卷材涂料论坛开通了

随着近年来彩板市场的迅速膨胀,彩板涂装线已从几年前的十来条,发展到2003年底的200多条。并且2004年还有不少彩板生产线即将投入使用。正因为这样,与之相配套的卷材涂料(也称为彩板涂料)也得到了快速发展,卷材涂料的供应商也有几家发展到了几十家。目前卷材涂料已     

卷材涂料

聚酯卷材涂料的研制，氯磺化聚乙烯在卷材涂料中的应用     

国内卷材涂料新进展

目前国内卷材涂料同质化竞争激烈，开发高性能卷材涂料势在必行，新型卷材涂料的开发必须综合平衡涂膜的硬度和柔韧性，而高固体涂料及无铬底漆等环境适应型涂料前景较好。     

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。     

A study of miscibility of blends of polybutadienes of varying microstructure

The miscibility of various amorphous polybutadienes with mixed microstructures of 1,4 addition units (cis, 1,4 and trans 1,4) and 1,2 addition units have been investigated. The studies here involved optical transparency, differential scanning calorimetry, and small angle light scattering. It was found that a 90 percent (cis) 1, 4 addition polybutadiene was immiscible with high (91 percent) 1,2 addition polybutadiene. Reduction of the 1,2 content to 71 percent induced an upper critical solution temperature (UCST) with the cis 1,4 polymer. Polybutadienes with 50 percent and 10 percent 1,2 contents were miscible above the crystalline melting temperature of the cis 1,4 polybutadiene. Immiscibility of the 91 percent 1,2 addition polymer was also found with a 10 percent 1,2 polybutadiene. The latter polymer also exhibits an UCST with the 71 percent 1,2 polymer. The results are used to interpret the characteristics of blends of polybutadienes of varying microstructure.     

Implementation of the Results of Mathematical Modeling of Orientation of Polypropylene Fibre

Process schemes for implementation of the optimum conditions of the final stage of orientational drawing of PP fibre are proposed based on the results of mathematical modeling. The existence of successive stages of transformation of the structure of PP fibre in the second stage of orientational drawing was experimentally confirmed with indirect indexes. The necessity of selecting the draw ratio that ensures completeness of the given stage of structural transformation is demonstrated. Structural schemes are proposed for automated control systems for selecting the optimum draw ratio in the first and final stages of orientational drawing and control of the structure of the spun polymer with indirect parameters.     

Theory of thermohydrodynamic instability of the front of filtration combustion of gases

Based on the filtration equations with account of heat transfer in the heating region, the problem of instability of small perturbations of the wave front of filtration combustion of a gas is solved. Expressions for the growth decrement and critical transverse size of a perturbation are obtained. The problem of the wave-front stability is solved with account of the macroscopic redistribution of filtration in the system. The solution includes macroscopic characteristics such as the transverse size, the width of the high-temperature zone, etc. A method is proposed for taking into account the influence of the characteristics of the system on the evolution of perturbations. It is shown that small deformation perturbations of the front always increase to a certain amplitude; their subsequent development— continuation of their growth or stabilization—is determined by the characteristics of the system. Translated fromFizika Goreniya i Vzryva, Vol. 35, No. 5, pp. 3–5, September–October 1999.     

Effect of Regime of Addition of Initiator on TEMPO-Mediated Polymerization of Styrene

Summary Investigation of the TEMPO-mediated polymerization of styrene at different regimes of addition of AIBN initiator showed that the course of the polymerization could be changed dramatically by a mode of the initiator addition without using any other additives. A very significant acceleration of the polymerization was reached at a specific regime without broadening the polydispersity of the resulting polymer.     

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。     

Process of acceleration of filtration of viscose

Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969.     

Coefficient of optimality of linings of heating units

The efficiency of the use of various refractories is estimated by an objective factor, namely, the coefficient of optimality of linings of heating units.Translated from Ogneupory, No. 12, pp. 26 – 27, December, 1994.     

Effect of degree of deacetylation of chitosan on the kinetics of ultrasonic degradation of chitosan

The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003