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    • 2. 发明授权
    • Process for reconcentrating overspray from one-component coating
compositions
    • 从单组分涂料组合物重新浓缩过量喷涂的方法
    • US5490939A
    • 1996-02-13
    • US393646
    • 1995-02-24
    • Markus GerigkJochen BruckWieland Hovestadt
    • Markus GerigkJochen BruckWieland Hovestadt
    • B01D61/02B01D61/14B01D61/58B05B15/04B05B15/12B29B17/02C02F1/44C08J11/00C08J11/04C09D5/00B01D61/00
    • B01D61/027B01D61/022B01D61/025B01D61/145B01D61/58B05B15/127C02F9/00C08J11/00B01D2317/022B01D2317/025B01D2317/08B05B15/1266C02F1/441C02F1/442C02F1/444C02F2103/14Y02P70/36
    • The present invention relates to a multi-stage membrane filtration process for reconcentrating the overspray from a one-component, aqueous coating composition containing high molecular weight components having a weight average molecular weight of at least 2000 and at least 5% by weight, based on the total weight of the organic components of the coating composition, of a low molecular weight component having a weight average molecular weight of less than 2000, that has been diluted with spray booth water from spray booths having wet flushing to form a booth/water overspray mixture bya) preconcentrating the booth water/overspray mixture in an ultrafiltration unit to obtain a first retentate containing high molecular weight components and a first permeant containing water and at least a portion of the low molecular weight components,b) treating said first permeant and the third permeant obtained in step c) below in a reverse osmosis unit to obtain a second permeant containing essentially pure water for recycle as booth water and a retentate containing low molecular weight components,c) treating said first and second retentates in a nanofiltration unit to obtain a third permeant containing water and a minor portion of low molecular weight components and a third retentate which largely corresponds in composition and concentration to said one-component, aqueous coating composition.
    • 本发明涉及一种多级膜过滤方法,其用于将单重组分水性涂料组合物重新浓缩过喷射,该组合物含有基于重均分子量至少为2000和至少5重量%的高分子量组分 重均分子量小于2000的低分子量组分的涂料组合物的有机组分的总重量,其已经用喷淋室用喷雾室水进行了湿式冲洗,以形成一个展位/水过喷 混合物通过a)在超滤单元中预浓缩展位水/超喷混合物以获得含有高分子量组分的第一渗余物和含有水和至少一部分低分子量组分的第一渗透物,b)处理所述第一渗透物和 在步骤c)中获得的第三渗透剂在反渗透单元中以获得含有主要的第二渗透物 y纯水作为展示水和含有低分子量组分的保留物,c)在纳米过滤单元中处理所述第一和第二滞留物以获得含有水和少量低分子量组分的第三渗透剂和第三渗余物,其中 在大多数组成和浓度上对应于所述单组分水性涂料组合物。
    • 4. 发明授权
    • Process for reusing the overspray obtained from spraying coating
compositions
    • 重复使用从喷涂组合物获得的过喷的方法
    • US5453460A
    • 1995-09-26
    • US201913
    • 1994-02-25
    • Wieland HovestadtJochen BruckHarald Blum
    • Wieland HovestadtJochen BruckHarald Blum
    • B05B15/04C08G18/00C08J11/00C08J11/04C09D175/00C09D175/04C08K5/16
    • C08J11/00
    • The present invention relates to a process for reusing the overspray obtained when spraying water dilutable two-component polyurethane coating compositions containing a polyisocyanate and a compound containing isocyanate reactive groups by(i) collecting the overspray and optionally diluting it with water,(ii) simultaneously with or after step (i), reacting the overspray, optionally in the presence of emulsifiers, with compounds which are more reactive with isocyanate groups than both water and the compounds containing isocyanate reactive groups and(iii) reusing the resulting aqueous solution or dispersion of the chemically modified overspray in a one- or two-component, chemically and/or physically drying coating composition, optionally after adjusting the spray viscosity of the coating compositions to a suitable spray viscosity by either removing or adding water and optionally after the addition of additives.
    • 本发明涉及一种重复使用在喷雾含有多异氰酸酯和含有异氰酸酯反应性基团的化合物的水可稀释双组分聚氨酯涂料组合物时获得的过度喷涂的方法,其方法是(i)收集过喷,并任选地用水稀释,(ii)同时 在步骤(i)之后或之后,任选地在乳化剂存在下使过喷,与水和含有异氰酸酯反应性基团的化合物比异氰酸酯基反应性更强的化合物反应,和(iii)将所得的水溶液或分散体 在一种或两种组分的化学和/或物理干燥的涂料组合物中的化学改性的超喷射,任选地在通过去除或加入水并任选地在添加添加剂之后将涂料组合物的喷雾粘度调节至合适的喷雾粘度 。
    • 5. 发明授权
    • Process for recovering binder components from lacquer sludge
    • 从漆泥回收粘合剂成分的方法
    • US5344851A
    • 1994-09-06
    • US54931
    • 1993-04-28
    • Wieland HovestadtJochen BruckVolker Schneider
    • Wieland HovestadtJochen BruckVolker Schneider
    • B29B17/00C08J11/00C08J11/04C09D5/46C09D7/00C09D175/00C09D175/04C08G18/14
    • C08J11/00C09D7/008C08J2375/04
    • The present invention relates to a process for recovering and recycling the organic binder components accumulating as overspray during the spraying of a solvent-containing, two-component polyurethane lacquer or a solvent-containing, moisture-curing, one-component polyurethane lacquer byi) washing the overspray out of the exhaust air of a coating plant with the aid of an aqueous medium which a) contains in dissolved or dispersed form compounds that exhibit greater reactivity towards isocyanate groups than either water or the isocyanate-reactive groups present in two-component polyurethane lacquers, and b) may contain emulsifiers,ii) isolating the chemically modified overspray formed in step (i) in the form of lacquer sludge by treatment with coagulating agents, which may be present in the aqueous medium,iii) mixing the lacquer sludge, containing fully reacted lacquer constituents, coagulating agents and water, optionally after a portion of the water is removed, with an organic solvent andiv) separating the organic phase accumulating in step iii) from the aqueous phase and insoluble-constituents which may be present and recovering the solution of modified organic binder components dissolved in the organic phase.
    • 本发明涉及在喷雾含溶剂的双组分聚氨酯漆或含溶剂的湿固化单组分聚氨酯漆时,通过i)回收和再循环累积为过喷的有机粘合剂组分的方法, 通过水性介质的水性介质,以溶解或分散的形式含有对异氰酸酯基团具有更大反应性的化合物,从而存在于双组分中的水或异氰酸酯反应性基团, 聚氨酯漆,和b)可以含有乳化剂,ii)通过用可能存在于水性介质中的凝结剂进行处理,以漆油污泥的形式分离步骤(i)中形成的化学改性的过喷剂,iii)将漆污泥 ,含有完全反应的漆组分,凝结剂和水,任选地在一部分水被除去后,用有机溶剂 t和iv)将步骤iii)中积聚的有机相与水相和可能存在的不溶组分分离并回收溶解在有机相中的改性有机粘合剂组分的溶液。