有机硅助剂在涂料工业中的应用

有机硅助剂在涂料中有广泛的应用,可用于提高涂料的生产效率,改善涂膜性能。根据使用领域的不同,有机硅助剂可分为有机硅润湿剂、流平剂、消泡剂、附着力促进剂等。文中介绍了各种不同类型的有机硅助剂在溶剂型涂料和水性涂料中的应用以及作用方式,并展望了有机硅助剂未来的发展趋势。     

有机硅在涂料工业中的应用(续四)

简述了用于涂料的有机硅助剂流平剂的作用,涂料在成膜过程中影响流动及流平性的因素;介绍了平滑、抗划伤和抗粘连助剂,消泡剂等的性能,以及硅树脂在涂料中的应用。     

飞机雷达罩用涂层材料工艺研究

介绍有机硅改性聚氨酯涂料的工艺及性能。该材料具有良好的耐候性、耐热性、耐雨蚀性和电传输效率；在涂刷工艺过程中通过控制工作粘度、温度、湿度等工艺参数，限定涂料消耗，选择溶剂、助剂等可以得到性能优良的飞机雷达罩保护涂层。     

水性有机硅耐高温涂料的制备

介绍了一种水性有机硅耐高温涂料的制备方法,从树脂、助剂、颜填料及固化条件的选择等方面对配方进行了优化,开发出水性有机硅耐高温涂料,可以承受600℃高温,具有优异的机械性能和防腐性能。     

低成本有机硅改性耐高温涂料的研制

以有机硅树脂、丙烯酸树脂和氨基树脂作为成膜物,以滑石粉作为填料,同时加入各种助剂和溶剂制得低成本有机硅改性耐高温涂料.分析了施工条件对涂膜性能的影响,该涂料具有耐热性好、防腐蚀、施工方便等特点.     

常温固化耐高温环氧改性有机硅聚氨酯防腐蚀涂料的研制

采用环氧601树脂和自制低相对分子质量有机硅树脂进行共缩合反应制得环氧树脂改性有机硅树脂,并以此改性树脂为基料,加入颜料、功能性填料、助剂等研制出耐高温自干型环氧改性有机硅聚氨酯防腐蚀涂料.讨论了树脂和涂料配方的组成及其制备工艺对其性能的影响.     

MomentiveACS推出多款有机硅涂料助剂

2008年美国涂料展于6月3日在美国夏洛特市开幕。会展期间,Momentive展出了一系列的有机硅涂料添加剂产品——CoatOSil,其中包括全新的CoatOSil1220和CoatOSil1221有机硅表面改性剂,这两款助剂可以提高涂料体系的流动性能和润湿性能;CoatOSilMP金属预处理液和C0atOSil2287水性乳胶漆助剂也在该次展会上亮相。     

耐高温有机硅涂料的研制

在耐高温颜填料、助剂、溶剂用量不变的前提下,考察等量国产有机硅树脂与进口硅酮树脂对耐高温涂料性能的影响,以论证国产有机硅树脂研制耐高温涂料的可行性。     

飞机用有机硅耐高温绝缘涂料的制备

针对飞机高温钢部件绝缘的需求,制备了一种有机硅耐高温绝缘涂料。研究了有机硅树脂、颜填料和助剂的选择与配比对涂料性能的影响,并确定了涂料的最佳配方。涂料性能测试结果表明,涂层的耐温性达700℃,绝缘电阻大于500 MΩ,且综合性能良好。该涂料已在飞机部件上实际应用十多年,效果良好。     

UV固化有机硅树脂的制备及其性能

基于有机硅树脂制备了UV固化有机硅树脂及离型涂料,讨论了涂料组分中UV固化有机硅树脂、单体、预聚物、助剂及涂布方式对涂层基本性能的影响,通过选择合适的树脂制备了低剥离力以及附着力较好的有机硅离型涂层。     

有机硅脱模剂生产及应用技术

概述了脱模剂的工作原理、种类和应用。对有机硅脱模剂进行了分类,并分析了每种类型的有机硅脱模剂的特点。通过比较有机硅脱模剂与非硅类型脱模剂的特点,突出了有机硅脱模剂的优势。介绍了有机硅脱模剂的生产和应用技术,包括产品配方、模拟应用实验及优选改进等。最后,对有机硅脱模剂的典型产品作了简单介绍。     

热空气硫化硅橡胶海绵的制备工艺

采用气相法白炭黑与沉淀法白炭黑并用的补强填料，以偶氮二甲酰胺作发泡剂，２，５－二甲基－２，５－二叔丁基过氧化己烷为硫化剂，配以适宜的发泡助剂，制得可发泡硅橡胶混炼胶，经挤出成形、硫化后，可制成不同截面形状的硅橡胶海绵条，其拉伸强度为０．５２ＭＰａ，扯断伸长率为１６０％。     

高粘度硅油乳液的制备研究

高粘度硅油一直存在难乳化及乳液稳定性差的问题。本文以100万cs硅油为原料,成功制得了高粘度硅油乳液,并对影响其稳定性的因素进行了探讨。结果表明:乳化剂的选择及用量、乳化时间、分散剂的选择及用量均影响硅油的乳化及乳液的稳定性。     

Influence of crosslinking degree of silicone rubber particles on properties of epoxy resin

Silicone rubber particles with different degrees of crosslinking were prepared. Silicone oils containing Si—H groups and vinyl groups were reacted at various mol ratios in their composite emulsions. Epoxy resin was modified using these particles and the results indicated that the content of the silicone rubber particles, the crosslinking degree of the rubber particles, and the addition of a coupling agent affected the properties of the modified epoxy resins. The influence of the coupling agent depends on the crosslinking degree of the silicone rubber particles. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 619–625, 1998     

有机硅改性丙烯酸酯耐水性影响因素的探讨

有机硅改性丙烯酸酯乳液具有卓越的耐水性、耐沾污性和耐候性,是制备超耐候性建筑外墙涂料的理想基料。研究了有机硅含量、乳化剂配比及含量、单体组成及配比对硅丙乳胶膜吸水性的影响。     

Study of flame-retarded silicone rubber with ceramifiable property

Fire-resistant ceramifiable silicone rubber composites with excellent comprehensive property were prepared in this paper. Silicone rubber was used as the base polymer, aluminum hydroxide, magnesium hydroxide, zinc borate, and glass frits were additives. The flammability and thermal stability properties, essentially focusing on the use of the limiting oxygen index and thermogravimetric analysis, were all studied. Besides, the ceramic residues were also studied by mechanical testing, scanning electron microscopy, and X-ray diffraction. The ceramifying silicone rubber could achieve a limiting oxygen index value of 34.8%, and the flexural strength of ceramic residues formed at 800°C was 9.7 MPa. The residue of composites was approximately 58.6% at 700°C, which is significantly higher than that of neat silicone rubber. The scanning electron microscopy analysis depicted that a dense structure was formed as formed.     

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     

耐磨擦硅橡胶涂层制备工艺研究

硅橡胶用于电子产品的按键涂层不仅手感柔软,同时具有优异的防污、耐化学品腐蚀等性能,但其耐磨性能有待改善。文章对影响硅橡胶涂层耐摩擦性能的因素,如VMC（甲基乙烯基环硅氧烷）的用量、偶联剂的影响、交联剂含氢硅油的种类及用量封头剂用量等进行了研究,结果表明,制备耐磨擦硅橡胶涂层的适宜工艺条件为：VMC、封头剂的用量分别为7％和0．067％,加入偶联剂可以提高硅橡胶涂层的耐磨擦性能,交联剂应采用高含氢硅油。     

Structure and properties of closed‐cell foam prepared from irradiation crosslinked silicone rubber

Silicone rubber foam was prepared through crosslinking with electron beam irradiation and foaming by the decomposing of blowing agent azobisformamide (AC) in hot air. The crosslinking and foaming of silicone rubber was carried out separately, which was different from the conventional method of chemical crosslinking and foaming. After foaming, the silicone rubber foam was irradiated again to stabilize the foam structure and further improve its mechanical properties. The effects of irradiation dose before and after foaming, and the amount of blowing agents on the structure and properties of silicone rubber foam were studied. The experimental results show that with the increase of AC content, the average cell diameter of silicone rubber foam increases a little, the foam density decreases to a minimum value when AC content is 10 phr. With the increase of irradiation dose before foaming from 10 to 17.5 kGy, the cell nucleation density of silicone rubber foam increases, the average cell diameter decreases, and the foam density increases. With the increase of irradiation before foaming, the tensile strength, tensile modulus, and the elongation at break of the silicone rubber foam increase. Through irradiation crosslinking again after foaming, the foam density is decreased and the mechanical properties of silicone foam are further improved. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009