蜡和蜡的用途

蜡,英文 Wax。原指从蜜蜂巢中取得的天然物质,即蜂蜡。后来在植物和矿物等物质中发现了同样的物质,也都称为蜡。只要外观和物理性质与蜡相似,不管它的化学组成如何。根据它的来源不同,人们以不同的名称来命名它,但它们都属于蜡的范畴。蜡广泛地分布在我们地球的自然界中。按大的类别大概分为虫蜡、动物蜡、植物蜡、矿物蜡,合成蜡及蜡状物。     

微粉化的聚乙烯蜡、聚丙烯蜡、聚四氟乙烯蜡

抚顺市通源科技开发研究所是集科研、开发、生产、销售为一体的特种蜡研究所，引进美国气流分散纳米微粉化技术，产品使用性能大幅提高，曾荣获新产品展交会金杯奖。经过十几年的发展，已开发出微粉化的聚乙烯蜡、聚丙烯蜡、聚四氟乙烯蜡及聚氨酯脱模蜡等100多种特种蜡，年产量达5500t以上，得到国内外厂家的广泛认可。研究所已通过ISO9001（2000）质量管理体系认证。     

微粉化的聚乙烯蜡、聚丙烯蜡、聚四氟乙烯蜡

抚顺市通源科技开发研究所是集科研、开发、生产、销售为一体的特种蜡研究所,引进美国气流分散纳米微粉化技术,产品使用性能大幅提高,曾荣获新产品展交会金杯奖。经过十几年的发展,已开发出微     

微粉化的聚乙烯蜡、聚丙烯蜡、聚四氟乙烯蜡

抚顺市通源科技开发研究所是集科研、开发、生产、销售为一体的特种蜡研究所,引进美国气流分散纳米微粉化技术,产品使用性能大幅提高,曾荣获新产品展交会金杯奖。经过十几年的发展,已开发出微粉化的聚乙烯蜡、聚丙烯蜡、聚四氟乙烯蜡及聚氨酯脱模蜡等100多种特种蜡,年产量达5500t以上,得到     

微粉化的聚乙烯蜡、聚丙烯蜡、聚四氟乙烯蜡

抚顺市通源科技开发研究所是集科研、开发、生产、销售为一体的特种蜡研究所，引进美国气流分散纳米微粉化技术，产品使用性能大幅提高，曾荣获新产品展交会金杯奖。经过十几年的发展，已开发出微粉化的聚乙烯蜡、聚丙烯蜡、聚四氟乙烯蜡及聚氨酯脱模蜡等100多种特种蜡，年产量达5500t以上，     

微粉化的聚乙烯蜡、聚丙烯蜡、聚四氟乙烯蜡

抚顺市通源科技开发研究所是集科研、开发、生产、销售为一体的特种蜡研究所，引进美国气流分散纳米微粉化技术，产品使用性能大幅提高，曾荣获新产品展交会金杯奖。经过十几年的发展，已开发出微粉化的聚乙烯蜡、聚丙烯蜡、聚四氟乙烯蜡及聚氨酯脱模蜡等100多种特种蜡，年产量达5500t以上，得到国内外厂家的广泛认可。研究所已通过ISO9001（2000）质量管理体系认证。     

关于逆流冷却塔雨区阻力计算的探讨

在逆流式冷却塔的空气阻力计算中,常常忽略了雨区阻力的计算,包括国标规范与高等教育的教科书等权威文献也未提及,根据工业塔的实测,这部分阻力占全塔空气阻力的1/6左右。本文根据冷却塔设计与运行的实践,并结合国内外学者对此的实验研究成果,经分析总结,给出了一个较为系统可行的计算方法,经验证与工业塔实测基本吻合,可供冷却塔设计中参考使用。     

耐高温尼龙聚邻苯二甲酰胺的研究进展

综述了聚邻苯二甲酰胺(PPA)的特性和应用,对部分PPA新品种制备方法及表征测试作了介绍,还介绍了PPA在耐热性、吸水性、尺寸稳定性、耐焊锡性等方面的研究进展。     

Improving the bending and corrosion resistance of an enamel by the addition of β-Si3N4 whiskers

Enamel–metal composite materials with high strength and corrosion resistance are often used for fabricating enameled pressure vessels for pharmaceutical and chemical production. However, the low bending resistance of the enamel can result in the cracking and delamination of the enamel layer, leading to the loss of corrosion resistance of the enameled pressure vessel, which can result in accidents. Here, based on the goal of increasing the bending resistance of the enamel to prolong its service life, the effect of β-Si₃N₄ whiskers on the mechanical properties of enamel was studied by three-point bending tests. The effect of β-Si₃N₄ whiskers on the acid and alkali corrosion resistance of enamel was studied using aqueous H₂SO₄ and NaOH solutions, respectively. A sudden change in the force of an enameled sample under the three-point bending test was used to evaluate the bending resistance of the enamel–metal samples, and can also be used to evaluate the mechanical properties of other comparable materials. With the addition of 0.5 wt% β-Si₃N₄ whiskers, the bending resistance was significantly improved, along with the acid and alkali corrosion resistance. These findings are expected to provide guidance for the design and production of enamel-metal vessels with improved performance that can significantly lengthen the service life of enameled pressure vessels and reduce the occurrence of accidents.     

电阻器专用涂料(Ⅰ)

介绍了电阻涂料底漆、面漆的种类和各类电阻涂料底漆和面漆的组成、特点及技术规格。同时,还简介了环氧型、油墨型及有机硅型标志涂料的特点和技术指标。     

Effect of partial substitution of alumina–chromium slag for Al2O3 on microstructures and properties of Al2O3–SiC–C trough castables

Alumina–chromium slag (ACS), a cheap and abundant refractory raw material comprising aluminum–chromium oxides and β-Al₂O₃, is a byproduct of ferrochrome smelting. For this reason, we investigated the relationships between composition and mechanical properties, abrasion resistance, oxidation resistance, and resistance to iron slag erosion for Al₂O₃–SiC–C trough castables in which ACS was substituted for alumina. Due to the presence of β-Al₂O₃ in ACS, the aluminum-chromium slag reacted with SiO₂ to form a low-melting phase of albite and promoted the formation of mullite, which filled the pores at high temperatures and reduced the porosity, thereby promoting densification and strengthening of the sample. The cold mechanical properties of the sample and the normal temperature wear resistance were enhanced, but the high-temperature mechanical properties and the resistance to iron slag corrosion of the sample were impaired. According to the results of the anti-oxidation experiment, the presence of β-Al₂O₃ in the ACS reduced the porosity and made the sample more dense, which remarkably improved oxidation resistance of the sample. For industrial production requirements, ACS substitution should not exceed 48?wt% due to of thermomechanical properties and anti-slag corrosion performance in Al₂O₃–SiC–C trough castables.     

Enhancement of thermal shock and slag corrosion resistance of MgO–ZrO2 ceramics by doping CeO2

The purpose of this paper was to develop ceramics materials with high thermal shock resistance and corrosion resistance for preparing gas blowing components. In this paper, MgO-rich MgO–ZrO₂ ceramics were obtained by using MgO powder and ZrO₂ powder as starting materials and CeO₂ as an additive. Changes in the properties in terms of thermal shock resistance, mechanical properties, and slag corrosion-resistance with chemical compositions were examined correlated to microstructure and phase changes. Especially, the effect of doping CeO₂ on phase transition of zirconia in MgO-rich system was discussed. The results showed that doping amount of CeO₂ significantly improved properties of MgO–ZrO₂ ceramics. Especially when doping amount of CeO₂ was 2 wt%, residual strength ratio was enhanced over 100% after thermal shock testing. In samples doped with CeO₂, ZrO₂ was stable in cubic or tetragonal form due to complete solution of CeO₂, which was important reason for the improvement of various properties of MgO–ZrO₂ ceramics.     

钢骨架塑料复合管的性能和应用

对钢骨架塑料复合管与其他管道的性能进行了比较,对比结果证明:钢骨架塑料复合管具有耐压、耐磨、耐腐蚀、抗蠕变、安装方便以及较高的性价比等特点。     

硅树脂及其涂料的研究新进展

综述了近十年来国内外耐热、耐腐蚀、耐候性硅树脂、改性硅树脂及其涂料的研究新进展；指出了硅树脂及其涂料的发展趋势。     

氧化镁-尖晶石浇注料的组成与性能的关系

以中档烧结镁砂、矾土基尖晶石和电熔白刚玉为主要原料,制备了不同基质组成的试样,并研究了浇注料的流动性、强度、永久线变化率、抗渣性和抗热震性。结果表明：基质的组成（特别是Ａｌ２Ｏ３／ＭｇＯ比）对浇注料的抗渣性、线变化率、抗剥落性和热震稳定性有显著影响,通过调整Ａｌ２Ｏ３／ＭｇＯ比可制得综合性能优良的氧化镁－尖晶石浇注料     

无醛防皱整理剂的研究进展

传统的防皱整理的发展历程及面临的新问题，阐述了多元羧酸类防皱整理剂作为棉织物理想的无甲醛防皱整理剂的防皱机理及性能，但由于它存在价格贵、织物泛黄色变、耐洗牢度差、含磷催化剂污染环境等问题，需要有效解决。最后，指出了无醛防皱整理今后的发展方向。