共查询到18条相似文献,搜索用时 107 毫秒
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简要介绍了低溶剂、低污染的高固体分航空涂料的发展概况。从高固体分涂料与常规溶剂型涂料的差异入手,分析了高固体分涂料涂膜流挂、橘皮、抽缩、缩孔等表面缺陷的成因。结合实际操作要求,从表面处理、喷涂设备、涂料调配、喷涂方式等方面总结了高固体分航空涂料操作的关键控制点。 相似文献
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《合成材料老化与应用》2016,(4)
在施工高固体分飞机蒙皮涂料过程中,合理选择表面处理、喷涂设备、涂料调配、喷涂方式等,是涂膜获得良好性能的关键。在此对飞机蒙皮高固体分涂料的关键施工点加以介绍。为了满足客户所提出的对涂料性能的各种要求,采用羟基丙烯酸树脂与聚酯树脂合理复配并科学选择固化剂、颜填料、助剂及施工工艺所研制的脂肪族聚氨酯面漆具有以下特点 相似文献
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商用车涂装线低 VOC涂料源头替代减排技术 总被引:1,自引:0,他引:1
随着环保法规的日趋严格,商用车涂装线面临着低 VOC涂料源头替代的选择。本文根据新国标 GB 24409—2020《车辆涂料中有害物质限量》和 GB/T 38597—2020《低挥发性有机物含量涂料产品技术要求》,以某公司商用车驾驶室涂装线实际转型路线选择为案例,结合废气处理技术,运用物料衡算法,分析了传统的常规固含溶剂型涂料与废气处理技术组合后的排放总量,对比了高固涂料与水性涂料对 VOCs排放总量的影响因素。对于老涂装线转型改造或者新建线涂料的选择具有指导意义。 相似文献
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《精细化工原料及中间体》2017,(1)
<正>众所周知,高固体分涂料是指喷涂时固体份大于或等于70%的涂料。对高颜料份的底漆来说,其高固体分涂料体积固体分可能是50NVV。这就要求用于涂料的合成树脂分子量及每个分子的平均官能度须降低,分子量分布要变窄。在此情况下同时要保持涂膜的功能不变则有一定困难。因此,研发新型的交联性树脂的合成技术和严格控制涂膜的固化条件便成为问题的关键。同时,此类涂料的实现也减少了有机溶剂的用量。当前,涂料行业的首要工作是发展四 相似文献
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概括了几种当前最新的汽车涂装技术及其施工应用的特点,并对这些技术路线的综合投入、VOC排放和能源消耗的水平和有关环境生命周期评价结果做了全面介绍,同时提出了针对不同汽车涂装项目所应采用的涂装工艺的建议,推荐对现有高VOC排放的溶剂型涂装线改造项目采用高固体分涂装体系。 相似文献
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Corrosion protective performances of commercial low-VOC epoxy/urethane coatings on hot-rolled 1010 mild steel 总被引:1,自引:0,他引:1
The protective properties of low-VOC epoxy/urethane paint systems of commercial grade have been investigated using a variety of techniques such as electrochemical impedance spectroscopy (EIS). One epoxy-polyamide mastic/urethane, three high-solid epoxy-amine/urethane coatings, one solvent-free epoxy-amine/urethane, one water-based epoxy-amine and one high-VOC alkyd paint system (used as paint reference system) were applied on hot-rolled 1010 mild steel panels and exposed for up to 2000 h in the salt spray cabinet (SSC) or for 1 year at an outdoor marine test site. These paints were tested for their barrier properties, corrosion-induced adhesion loss and visual defects, as well as for their flexibility and resistance to direct impact. The barrier properties increased in the following order: alkyd相似文献
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本文重点从国内各商用车主机厂车架板材的应用类型、各板材的不同预处理工艺、车架结构特点、防腐工艺现状及发展趋势进行了阐述,通过市场问题走访、售后服务反馈、行业调研及对应防腐工艺试验验证数据进行车架各种涂装工艺的防腐质量对比,以达到为车架行业防腐工艺升级指明方向。通过整体的试验数据分析和涂装环保政策导向,目前适合车架防腐工艺升级的路线为散件电泳 +总成喷粉的工艺。该工艺采用散件电泳能够解决电泳夹层锈蚀的问题,总成喷粉能够提升现有总成耐老化不足的问题,整体耐盐雾、耐老化的防腐指标均能够达到 1 000 h。 相似文献
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The present investigation deals with the study of effect of molecular weight and structures of phenalkamine curing agents on the curing, mechanical, thermal and anticorrosive properties of epoxy based coatings. The phenalkamines were prepared by varying the composition of formaldehyde and diamine in the formulation. The structural characterization confirmed successful preparation of high molecular weight phenalkamines. These were then used as curing agents for air drying and thermally curable epoxy coatings. The effect of these phenalkamines on curing properties of epoxy resin as well as mechanical, chemical, thermal and dynamic thermo-mechanical properties of the resultant coatings was studied and compared with commercial phenalkamine. The anticorrosive properties of the coatings were evaluated by salt spray test and electrochemical impedance spectroscopy. The study revealed that high molecular weight phenalkamines resulted in faster surface drying due to rapid molecular weight build-up. The anticorrosive performance also improved as indicated by higher modulus and electrochemical potential values. 相似文献