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《涂料工业》2013,(12):18
随着各国环保法规对VOC的限定以及人们对环保的重视,水性聚氨酯行业得到迅速发展。当前,水可分散聚氨酯材料的制造工艺和生产规模已具有较高水平,涉及水性聚氨酯技术的理论研究也日新月异,水性聚氨酯树脂已在涂料、织物、皮革、粘合剂等领域得到了广泛的应用。为了扩充水性聚氨酯行业人才队伍,加强技术交流,使行业工作者及时了解水性聚氨酯发展的前沿技术,掌握水性聚氨酯技术的基本知识和方法,从而更好地拓展水性聚氨酯相关应用领域,推动水性技术的发展,中国聚氨酯工业协会水性聚氨酯专委会将与《涂料工业》编辑部、中国化工学会涂料涂装专业委员会联合,于2014年3月17-21日在广州举办第4届水性聚氨酯培 相似文献
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Preparation of waterborne polyurethanes using an amphiphilic diol for breathable waterproof textile coatings 总被引:2,自引:0,他引:2
Qing Bo Meng Sung-Il Lee Changwoon Nah Youn-Sik Lee 《Progress in Organic Coatings》2009,66(4):382-386
The application of polyurethanes (PUs) on breathable waterproof fabric coatings requires a balance of water vapor permeability (WVP) and water resistance which can be achieved by tailoring hydrophilic and hydrophobic segments. PU prepolymers were prepared from isophorone diisocyanate, dimethylol butanoic acid, and a mixture of various ratios of amphiphilic PPG2050 (copolymer of ethylene oxide and propylene oxide with –OH end groups) and hydrophobic poly(tetramethylene ether glycol) (PTMEG). After neutralization with triethylamine, the prepolymers were chain-extended with ethylene diamine/1,4-butanediol (1:1 by molar). The WVP values of the fabric coatings prepared using various waterborne PUs were very similar (910–990 g/m2 × 24 h). When waterborne PUs prepared using a mixture of PPG2050 and PTMEG were employed for the textile coatings, the resulting PU-coated textiles exhibited excellent waterproof properties (>10,000 mm H2O). The textile coatings prepared from PPG2050/PTMEG-based waterborne PUs were significantly more waterproof than those prepared from poly(ethylene glycol) (PEG)/poly(propylene glycol) (PPG)/PTMEG-based waterborne PU. This is probably due to a more even distribution of hydrophobic segments in the PUs, even though the WVP values of the PEG/PPG/PTMEG-based PU coatings were considerably smaller than those of the PPG2050/PTMEG-based PU coatings. 相似文献
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该文介绍了水性木器涂料在我国的发展及取得的成就,同时介绍水性涂料的涂装方式为手工和喷,辊、滚、浸印、帘幕等机械涂装;水性涂料的干燥,影响因素及涂膜弊病干燥设施等;指出涂装是涂料性能的体现而涂料配方的设计应满足涂装和施工要求。 相似文献
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The development of vegetable oil-based polymers was particularly suitable for the era of increasingly scarce petroleum. Self-colored castor oil-based waterborne polyurethanes (PUs) were successfully synthesized based on castor oil and 1-amino-4-hydroxy-2-(6-hydroxyhexyl) anthraquinone (DR) as polyols. The UV–Vis spectrum showed that the addition of carboxylic acid groups make the spectrum of the PU produce the hyperchromic effect under alkaline conditions. Castor oil-based waterborne colored PUs possessed excellent stability under weak alkaline conditions. The connection of castor oil caused the PU to constitute soft polymer networks. PU coatings on cotton fabrics possessed excellent color properties. The urethane groups in the PUs formed hydrogen bonds with the hydroxyl groups on the cotton fibers and the polymer network structure formed by the PU coating itself made the color fastness of the cotton coatings reached grade 5. With the increase of castor oil content, the degradation rate of castor oil-based waterborne colored PU increased from 3.45% to 3.65%. This work provides a way to impart excellent color properties and fastness to PU coatings by inserting dye molecules and vegetable oils into the PU macromolecular chain. 相似文献
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《Progress in Organic Coatings》2010,67(4):382-386
The application of polyurethanes (PUs) on breathable waterproof fabric coatings requires a balance of water vapor permeability (WVP) and water resistance which can be achieved by tailoring hydrophilic and hydrophobic segments. PU prepolymers were prepared from isophorone diisocyanate, dimethylol butanoic acid, and a mixture of various ratios of amphiphilic PPG2050 (copolymer of ethylene oxide and propylene oxide with –OH end groups) and hydrophobic poly(tetramethylene ether glycol) (PTMEG). After neutralization with triethylamine, the prepolymers were chain-extended with ethylene diamine/1,4-butanediol (1:1 by molar). The WVP values of the fabric coatings prepared using various waterborne PUs were very similar (910–990 g/m2 × 24 h). When waterborne PUs prepared using a mixture of PPG2050 and PTMEG were employed for the textile coatings, the resulting PU-coated textiles exhibited excellent waterproof properties (>10,000 mm H2O). The textile coatings prepared from PPG2050/PTMEG-based waterborne PUs were significantly more waterproof than those prepared from poly(ethylene glycol) (PEG)/poly(propylene glycol) (PPG)/PTMEG-based waterborne PU. This is probably due to a more even distribution of hydrophobic segments in the PUs, even though the WVP values of the PEG/PPG/PTMEG-based PU coatings were considerably smaller than those of the PPG2050/PTMEG-based PU coatings. 相似文献
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