共查询到20条相似文献,搜索用时 93 毫秒
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以硅烷改性聚醚为基础聚合物、配合填料和助剂,制备出了一种新型环保防水涂料。重点分析了不同类型增塑剂对硅烷改性聚醚防水涂料力学性能、粘结性能、耐老化性能、防水性能及储存性能的影响。结果表明,添加聚醚二元醇和聚醚三元醇制得的硅烷改性聚醚防水涂料力学性能和粘结性能相对较优,添加聚醚二元醇制得的硅烷改性聚醚防水涂料防水性能最佳,采用DINP、DINCH和DPHP制得的硅烷改性聚醚防水涂料耐老化性、力学性能和储存稳定性更好。 相似文献
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康杰分沈春林褚建军王玉峰 《新型建筑材料》2022,(8):87-89
开发了一款常温生产的单组分硅烷改性聚醚密封胶。试验结果表明,采用30份活性纳米碳酸钙作为抗流挂剂,2份乙烯基硅烷作为除水剂,0.1份复配催化剂[m(辛酸亚锡)∶m(双吗啉胺)=2∶8],可制得触变性好、回弹率高、表干快、黏度低和耐候性优良的单组分硅烷改性聚醚(MS)密封胶,适合装配式建筑拼接缝的防水密封。 相似文献
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本文采用硅烷改性聚醚树脂、聚氧化丙烯二醇、碳酸钙、乙烯基三甲氧基硅烷、偶联剂、触变剂、紫外吸收剂、催化剂等制备一种高透明低雾度的硅烷改性聚醚密封胶(MS胶),并选择不同类型的树脂和触变剂研究对密封胶性能的影响.结果表明,比表面积200m2/g左右疏水型气相二氧化硅适合制备高透光率和低雾度的密封胶,当其用量在10%左右时... 相似文献
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研究了不同型号聚醚多糖、氨基磺酸系高效减水剂及其复配对水泥石力学性能的影响,结果表明聚醚多糖与氨基磺酸盐复配后的水泥净浆固结强度有一定的增强性,且当聚醚多糖掺量适当时,混凝土强度也较高。 相似文献
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《Planning》2014,(7)
Polyether modified organic silicone was successfully prepared from Eight methyl siloxane,tetramethyl dihydro two siloxane and UPEO.The chemical structure of the Polyether modified organic silicone was characterized by FT-IR.The wettability of treated cotton fabrics was increased.And the softness was improved significantly. 相似文献
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综述了硅烷改性聚氨酯密封胶的发展历程、固化机理、合成方法、典型配方、性能、研究开发进展以及存在的一些问题.指出,硅烷改性聚氨酯密封胶综合了聚氨酯密封胶和硅酮密封胶两者的优势,具有快速固化,耐水、耐候,粘结性能优异,基材适应性广,不合游离—NCO基团等优点,在中高端建筑领域有着较好的市场应用前景. 相似文献
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酰胺类聚羧酸系减水剂的合成工艺及性能研究 总被引:1,自引:1,他引:0
探讨了酰胺类聚羧酸系减水剂的合成工艺,设计采用聚醚胺(PN-220)和聚丙烯酸(PAA)为共聚单体,直接聚合制得减水剂.通过试验,就PAA的相对分子质量、单体比例、聚合温度和时间对砂浆减水率、流动度保持性的影响规律进行了分析.在此基础上设计正交试验,得到最佳合成工艺.就采用最佳工艺所合成的产品,与当前普遍生产使用的以聚乙二醇单甲醚(MPEG)和甲基丙烯酸(MAA)为单体合成的产品进行性能对比,结果表明前者是一种保坍性能优异的聚羧酸系减水剂,适用于坍落度保持性要求很高的混凝土. 相似文献
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Lucas Bustamante Valencia Thomas Rogaume Eric Guillaume Guillermo Rein Jose L. Torero 《Fire Safety Journal》2009
This paper studies the release of the principal gas species produced during the combustion of a non-flame-retarded Polyether Polyurethane Foam (PPUF) of density of 20.9 kg m−3 in the cone calorimeter. Five irradiance levels are studied: 10, 20, 30, 40 and 50 kW m−2. Heat release rate, mass-loss rate and bulk gas mass flow are measured. The mass flow and yields of gas species are measured as well. The analysis of release of gas species relative to time allowed the study of the different stages of PPUF kinetics and to quantify the gas composition. Of the twenty-two different gas species that were monitored simultaneously, the principal species found were CO2, CO, H2O, NO and total hydrocarbons. According to species release, two decomposition stages for PPUF are identified. In the first stage, the solid structure breaks down carrying the decomposition of isocyanate, and in the second stage the polyol decomposes. These two stages are in agreement with the decomposition mechanism proposed in the literature. However, the data presented here is the first experimental study of burning behavior of PPUF taking into account the release of gas species too. An elemental analysis was performed and the chemical formula of the virgin material was determined. This allows the mass balance of the elements in the virgin foam content with the gaseous product content. The effective heat of combustion and the ratio between heat release rate and CO2 mass flow are calculated at each of the irradiance levels. 相似文献