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水性聚氨酯树脂的改性及应用研究 总被引:3,自引:0,他引:3
研究了水性聚氨酯的扩链、交联、丙烯酸酯复合等改性方法以及水性聚氨酯木器漆的研制。结果表明:对水性聚氨酯进行扩链、交联以及丙烯酸酯复合改性,能显著提高水性聚氨酯的拉伸强度、硬度、耐磨性、耐水耐醇性。经检测,用改性水性聚氨酯树脂配制的木器漆主要性能均达到聚酯聚氨酯木器漆行业标准(HG/T3608-1999)。 相似文献
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主要总结了几种提高水性聚氨酯综合性能的交联改性方法,包括内交联改性水性聚氨酯、外交联改性水性聚氨酯及其作用机理;综述了近年来国内外最新研究进展,旨在加深人们对水性聚氨酯的研究了解。 相似文献
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详本文介绍了水性聚氨酯的性能特点,重点阐述了水性聚氨酯改性方法:丙烯酸改性、环氧树脂改性、有机硅改性、交联改性、纳米无机材料改性、植物油改性.并指出了水性聚氨酯改性技术进一步发展的方向. 相似文献
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水性聚氨酯改性研究进展 总被引:1,自引:0,他引:1
聚氨酯作为一类具有良好的机械性能高分子材料,在很多范围内得到应用。水性聚氨酯的问世,更是适应了目前化工环保化的趋势。然而水性聚氨酯的耐水、耐溶剂、耐候等方面表现较差。本文介绍了目前国内外水性聚氨酯的研究应用现状,以及水性聚氨酯的几种改性方法:交联改性,互穿网络改性,环氧树脂改性,有机硅改性,多重改性等。同时也指出今后水性聚氨酯改性的发展趋势。 相似文献
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环氧硅烷外交联改性水性聚氨酯的研究 总被引:5,自引:2,他引:5
合成阴离子型水性聚氨酯,使用环氧硅烷外交联改性水性聚氨酯。研究发现,环氧硅烷经预乳化之后能够与水性聚氨酯相容,改性之后的水性体系能够保持较长时间稳定而不凝胶,有效贮存期超过3个月。随着环氧硅烷用量的增加,涂膜的拉伸强度逐渐增加,延伸率先持续下降,后略有增加,吸水率大幅下降,粘接强度得到明显的提高。 相似文献
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单组分自交联水性聚氨酯分散体涂料 总被引:11,自引:0,他引:11
:叙述了单组分自交联水性聚氨酯分散体的组成、制备及合成机理。介绍了单组分自交联水性聚氨酯分散体的配方、制备工艺及性能 ,并对影响水性聚氨酯分散体的各种组分及影响涂层性能的各种水性助剂作了探讨 相似文献
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Anionic aqueous polyurethane dispersion was synthesized through self‐emulsifing method from cycloaliphatic isophorone diisocyanate (IPDI) and dimethylolpropionic acid (DMPA). The carboxyl acid group in DMPA was used to make the polyurethane dispersible. The polyurethane/polyacrylate (PU/PA) composite particles were also prepared by seeded surfactant‐free emulsion polymerization; the cycloaliphatic polyurethane aqueous dispersion was used as seed particles. The structures and properties of the composite emulsion as well as the physical mixture of polyurethane dispersion and polyacrylate emulsion were characterized by FTIR, DSC, dynamic light scattering, TEM, X‐ray photoelectron spectroscopy (ESCA), and electronic tensile machine. The results showed that the synthesized PU/PA composite emulsion was found to form inverted core‐shell structure with polyacrylate as the core and with polyurethane as the shell, and its diameter of particles is in the range of nanograde, the crosslinking reaction was existed in composite emulsion. The intimate molecular mixing of crosslinking polymers are also claims to result in a superior balance of properties compared to physical blends of polyurethane dispersion and acrylate emulsion. The crosslinking mechanism of PU/PA composite emulsion was also discussed. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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