高渗透型有机硅防水剂

概述了影响混凝土和砖石建筑物等建材强度的因素、高渗透有机硅防水剂的种类和特性,研究了高性能有机硅防水剂对混凝土的保护性能。     

一种有机硅氟防水剂及其制备方法

本发明公开了一种有机硅氟防水剂,该防水剂由活性成分和溶剂组成,其中活性成分为有机硅氟树脂预聚物,该有机硅氟树脂预聚物是由烷基硅氧烷偶联剂或者几种烷基硅氧烷偶联剂的混合物与羟基氟硅油在酸性或碱性催化剂存在下,发生水解反应制得。本发明还公开了上述有机硅氟防水剂的制备方法。     

纳米CaCO3改性有机硅防水剂的合成及涂层性能

采用CaCO_3无机材料,合成不同纳米CaCO_3含量的有机硅防水剂,在有机硅表面构建起粗糙结构,增强有机硅防水剂的疏水性能。通过红外光谱(FTIR)和扫描电镜(SEM)对改性有机硅防水剂进行结构和形貌表征。通过测试接触角,防水性和耐洗性对改性有机硅防水剂的防水效果进行评价。当CaCO_3加入量为4 g时接触角达到最大143.8°,防水等级为4级。     

有机硅防水剂增加纸张抗水性能的研究

主要对纸张中添加有机硅防水剂进行研究,与传统施胶剂分散松香胶抗水性能进行对比,探讨了有机硅防水剂对纸张防水性能的影响。     

水乳型有机硅系表面处理剂的性能

以烷氧基烷基硅烷为活性基本原料，通过化学改性和乳化技术制备出性能优良的有机硅防水剂，详细研究了经水乳型有机硅防水剂表面处理的建材的防水和表面性能的变化。     

用于建材疏水化处理的水性有机硅防水剂

本文论述了有机硅斥水型防水剂的实用价值、疏水原理,并详细阐述了近年来用于建筑材料的水性有机防水剂的制备和研究进展。     

有机硅建筑防水剂的研究与发展

概述有机硅建筑防水剂的类型及用途,介绍了各类防水剂的防水原理和使用,以及国内外的研究进展.     

有机硅高沸物的综合利用

有机硅高沸物是合成甲基氯硅烷单体的副产物,作者简述了利用有机硅高沸物制备单硅烷、硅油、有机硅防水剂、消泡剂、陶瓷和有机硅树脂等产品的生产方法及技术特点,并对高沸物催化裂解产业化的发展方向提出了建议。     

有机氟织物整理剂与其他助剂的联合增效效应研究

本文系统研究了有机氟防水剂与免疫树脂交联剂、烃类防水剂、有机硅防水剂等混合使用时，化合物之间的相互作用，实验表明有机氟防水剂与免烫树脂交联剂联合使用能提高织物的耐洗性能，与烃类防水剂复配具有良好的联合增效效应，并提出了相应的工艺条件。     

乳液型有机硅建筑防水剂

讨论了乳化剂种类及用量、各种助剂对乳液型有机硅建筑防水剂性能的影响。结果表明；当采用ＴＯＡ或司盘＋平平加Ｏ作乳化剂，用量６～１０份时，乳液型有机硅建筑防水剂的贮存期和防水性能最佳，同时，也介绍了产品的配比生产工艺和应用中的注意事项。     

建筑用有机硅防水剂的研拓

对不同种类的有机硅防水剂在建筑防水材料中的应用及研究开拓进行了扼要的综述。     

有机硅防水剂整理织物的研究

采用羟基硅油乳液和含氢硅油乳液及助剂配成有机硅防水剂，辅以氯磺化聚乙烯和顺丁橡胶制成的胶料处理织物，取得了明显的防水效果     

影响单组分聚氨酯防水涂料性能的因素

比较了单组分、双组分聚氨酯防水涂料的优缺点。分析了影响单组分聚氨酯防水涂料性能的因素。介绍了单组分聚氨酯防水涂料的施工工艺。     

混凝土结构的有机硅防水处理

水和侵蚀性介质是引起混凝土破坏和其中钢筋锈蚀的最主要外部因素。混凝土经防水处理后,耐久性会大大提高,且与常规维修比较具有更好的生态效果。     

Silicone Hydrophobicity and Oleophilicity

Polydimethylsiloxane (PDMS), the most familiar silicone polymer, is a very water repellent material. Its hydrophobicity is not markedly less than many fluorine containing polymers. The original purpose of introducing fluorine into silicones in the form of polymethyltrifluoropropylsiloxane (PMTFPS) was not to seek enhanced water repellency but to provide improved resistance to organic oils and solvents. Because of the two methyl groups on each silicon atom in PDMS, the resultant oleophilicity is a considerable drawback in applications involving exposure to hydrocarbon fluids and oils. In this article we survey the contact angles with water and n-hexadecane of these polymers and related, more highly fluorinated fluorosilicones, being the simplest measure of their hydrophobicity and oleophilicity, respectively. These contact angle values provide quantitative insight into commercially valuable aspects of silicone surface science.     

Water‐repellent finishing of cotton fabrics by ultraviolet curing

Cotton fabrics were water‐repellent‐finished by radical ultraviolet curing of silicone and urethane acrylates with different formulations. The fabrics were impregnated with undiluted resins and with toluene solutions or water emulsions. Moreover, cationic ultraviolet‐curable systems were also investigated, such as an epoxy‐functional polysiloxane and mixtures of an epoxy resin with hydroxyl‐containing silicone additives. The gel content and polymerization yield were considered for the ultraviolet‐curing process evaluation. Water‐resistance properties were determined in terms of the contact angle, wettability, moisture adsorption, and water vapor permeability measurements, whereas the morphology and surface composition of treated fabrics were examined with scanning electron microscopy and energy‐dispersive X‐ray analysis. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Preparation and coating properties of an acrylic melamine resin containing silicone segments

The aim of this study was the preparation of novel water repellent UV curable materials using acrylic modified melamine (AM) and poly-dimethylsiloxane (PDMS). UV curable acrylic melamines containing silicone segments (SiAMs) were synthesized by condensation of methylolmelamine, 2-hydroxyethyl acrylate, and carbinol-modified PDMS. The SiAM films with a 0.3 wt% PDMS segment that were cured by UV irradiation had higher transparency than that of a blended sample. Examination with a scanning electron microscope revealed that the blend sample has cohesion of the silicone segments, while such a phenomenon was not observed in the composite samples (SiAMs). From these results, it was confirmed that aggregation of the silicone segments was prevented by introducing the silicone segments into the acrylic melamine. By introducing 0.3 wt% of PDMS segments into AM, good water-shedding properties were confirmed, while several of the most attractive features of AM, such as hardness, adhesion, and refractive index, were maintained.     

模块化的水性溶胶-凝胶技术

介绍了一种水性、模块化、高温固化的硅烷金属防腐保护技术——溶胶-凝胶技术。探讨了其应用于金属预处理和金属表面处理上所取得的效果。结果表明,通过其体系各组分间的搭配使用能够提供很好的防腐蚀性能、疏水疏油的"易清洁"/"抗指痕"效果,且可大大提高耐候性。产品为水性,完全符合欧洲无有害物质释放标准(RoHS),在无铬钝化方面有很好的市场应用前景。     

Study of water repellent effect of earth substrates impregnated with water-based silicones

As part of a study to assess the efficacy of impregnation for masonry materials, the impregnation of earth substrates with soluble sodium silicate followed by water-based silane/siloxane emulsion was investigated. The treatment was found to be successful in achieving water repellent and consolidation effects for the earth substrates. The water repellent effect is developed by the silane/siloxane emulsion which forms a polysiloxane thin film on the capillary wall surface through siloxane bonds. The water repellent effect is greatly enhanced by pre-impregnation with the silicate. The consolidation of the earth substrate by soluble sodium silicate is caused by the silicate gel formed by crosslinking with the substrate. The water repellent and consolidation effects in the earth substrates have been studied by using water absorption tests and FTIR examination.