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水泥基腻子面漆二合一内墙涂料的制备 总被引:1,自引:1,他引:0
以自制的可再分散乳胶为主要成膜物质,结合水泥水硬性无机粘结剂制备了腻子面漆二合一内墙涂料,重点讨论了可再分散乳胶粉、纤维素醚、粉状憎水剂对涂膜性能的影响.实验结果表明,可再分散乳胶粉及其用量对腻子面漆二合一涂料性能具有重要影响,当其用量为4%~6%时,涂膜具有良好的综合性能;纤维素醚能明显改善涂料的施工性能和保水性能,其最佳用量为0.3%;粉状憎水剂显著提高涂膜的耐水性和耐洗擦性能,其用量为0.3%时可达到很好的效果.产品综合性能达到或超过国标JG/3049-1998N型和GB/T 9756-2001优等品指标值. 相似文献
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巴士客车用丙烯酸聚氨酯罩光清漆的制备 总被引:5,自引:0,他引:5
介绍了以聚酯树脂和特种助剂对罩光清漆进行改性,制得了适合巴士客车使用的丙烯酸聚氨酯罩光清漆。分析了聚酯树脂和特种助剂对罩光清漆的丰满度、抗划伤性能、流平性和施工性能的影响。结果表明当选用高固含、高羟基聚酯树脂对丙烯酸树脂进行改性时,涂料具有较好的丰满度和抗划伤性能;当流平剂选用丙烯酸类和有机硅类搭配使用时,可大大提高罩光清漆的流平性能;当触变剂BYK-410的用量为0.3%时,清漆一次涂装干膜60μm不流挂,当DBE慢干剂用量为2%时,涂料具有好的施工性能。 相似文献
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正以触变剂掺量为参数,考察了其对环氧树脂胶粘剂的施工工艺性(黏度、触变指数)及力学性能(钢对钢拉伸剪切强度、拉伸强度及断裂伸长率)的影响。结果表明:适当的触变剂掺量不仅能改善环氧树脂胶粘剂的施工性能,而且对其粘接性能和胶体性能也具有调节作用。当触变剂为2%时,环氧树脂胶粘剂的黏度较低,有利于施工搅拌;当触变剂为3%时,触变指数相对最大。随着触变剂掺量的增大,环 相似文献
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利用相平衡原理得出的焦油蒸馏时一次汽化温度的计算方法,其结果与按经验公式的计算结果进行了比较,同时讨论了一次汽化温度与焦油馏分产率及二段蒸发器过热蒸汽用量的关系。 相似文献
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《Journal of Adhesion Science and Technology》2013,27(1):261-275
—Due to its chemistry, no structural adhesive system (epoxies, acrylics, etc.) is likely to offer an ideal combination of toughness, strength, moisture resistance, and ambient-temperature curing. Therefore, for effective use of adhesives in primary structures, an engineer must be able to identify adhesives that represent an optimum compromise among the different properties. In this paper, we present techniques for screening high-strength, ambient-temperature-curing adhesives for (1) moisture resistance under sustained loading and (2) fracture resistance in a way that is directly related to joint performance. 相似文献
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Su Yeon Kwon Jung Hee Shim Yu Ha Kim Chang Su Lim Seong Bae An Inbo Han 《International journal of molecular sciences》2021,22(23)
Whitlockite (WH) is the second most abundant inorganic component of human bone, accounting for approximately 25% of bone tissue. This study investigated the role of WH in bone remodeling and formation in a mouse spinal fusion model. Specifically, morphology and composition analysis, tests of porosity and surface area, thermogravimetric analysis, an ion-release test, and a cell viability test were conducted to analyze the properties of bone substitutes. The MagOss group received WH, Group A received 100% beta-tricalcium phosphate (β-TCP), Group B received 100% hydroxyapatite (HAp), Group C received 30% HAp/70% β-TCP, and Group D received 60% HAp/40% β-TCP (n = 10 each). All mice were sacrificed 6 weeks after implantation, and micro-CT, hematoxylin and eosin (HE) staining, and Masson trichome (MT) staining and immunohistochemistry were performed. The MagOss group showed more homogeneous and smaller grains, and nanopores (<500 nm) were found in only the MagOss group. On micro-CT, the MagOss group showed larger fusion mass and better graft incorporation into the decorticate mouse spine than other groups. In the in vivo experiment with HE staining, the MagOss group showed the highest new bone area (mean: decortication group, 9.50%; A, 15.08%; B, 15.70%; C, 14.76%; D, 14.70%; MagOss, 22.69%; p < 0.0001). In MT staining, the MagOss group demonstrated the highest new bone area (mean: decortication group, 15.62%; A, 21.41%; B, 22.86%; C, 23.07%; D, 22.47%; MagOss, 26.29%; p < 0.0001). In an immunohistochemical analysis for osteocalcin, osteopontin, and CD31, the MagOss group showed a higher positive area than other groups. WH showed comparable bone conductivity to HAp and β-TCP and increased new bone formation. WH is likely to be used as an improved bone substitute with better bone conductivity than HAp and β-TCP. 相似文献
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《China Chemical Reporter》2010,(19)
<正> After June this year China's regions growingmiddle and late rice had widespread blastand sheath/culm blight.Such diseasesplagued 19.2 million hectares.Starting fromJuly the market for new fungicides that cancontrol blast and sheath/culm blight for ricewas more and more active.Makers of traditional pesticides for thecontrol of blast have to contend with fiercecompetition from new pesticides in marketthis year.Kitazine,iprobenfos,isoprothiolane and tricyclazole,oftenused by farmers in the past,are graduallybeing replaced by new varieties with high 相似文献