涂装前处理实用技术问答

1 前处理对涂装质量的影响 据有关专家分析,影响涂层寿命的各种因素中,前处理占49.5%,其次是其他因素及涂料本身的性能和质量.因此,涂装前处理的质量是关键因素,而前处理剂及工艺的选择是涂装前处理的重要环节.     

汽车涂装前表面处理概述

汽车涂装前的表面处理是很重要的，它关系到涂层的附着力和使用寿命，直接影响涂装工程质量。所以说，要保证涂层经久耐用，符合使用要求，充分发挥涂料的保护和装饰作用，除了涂料本身的质量外，对被涂装的金属和非金属表面的预处理工作是十分重要的，必须引起足够的重视。     

射线屏蔽涂料

201305043 耐候性优异、透明度高且能形成硬涂层的UV屏蔽涂料组合物及对汽车前照灯塑料罩的涂装：JP2012-168377[日本专利公开]／日本：Sumitomo Osaka Cement Co.,Ltd.（Suzuki,Kazuya等）.-2012．09．06.-11页.-201l／29 727（2011．02．15）：IPC G0281／10 题述涂料组合物适用于户外涂装件,由（A）分散体平均粒径在5～70nm的UV屏蔽粒子和（B）树脂基料组成。该涂料组合物中也可含硅溶胶。其中（A）UV屏蔽粒子需满足：（a1）初级粒子粒径为5～50nm的氧化钛粒子,（a2）氢氧化铝含量占氧化钛粒子体积分数1Z-3SZ的表面处理含氢氧化铝包覆层（包覆于氧化钛粒子表面）（a3）硅含量占氧化钛粒子体积分数10％～30Z的含硅包覆层。     

汽车涂装前处理的质量检测

汽车涂装前处理是涂装的基础,其质量优劣对涂层性能影响极大,在前处理中要特别注意检查脱脂清洁度和磷化膜的外观质量两大指标。     

汽车用中间涂料

汽车用中间涂料在汽车涂装中，为了提高涂层的抗石击性，针对电泳底漆、中间涂料和面漆涂装提出许多改进方案。考虑汽车外表美观，面漆涂装的改进方案不多，然而中间涂料涂装的改进方案有多种：其一，在中间涂料中加入片状无机填料（如滑石粉、绢云母等）；其二，采用聚酯...     

风力发电机组塔筒涂装要求及质量控制

塔筒是风力发电设备中需要防护的重点,理想的防腐效果涉及防腐涂层的设计、表面处理、涂装工艺、涂料质量及涂层质量的控制等。本文简要介绍塔筒典型的涂装体系以及涂装质量、涂料质量的控制。     

风电机组叶片涂装要求及质量控制

风电叶片是风电机组的核心部件之一,主要采用环氧玻璃钢复合材料,要求使用寿命达20a,需要进行重点涂装保护。高效的防护效果取决于防护涂层的设计、表面处理、涂装工艺、涂料质量及涂层质量的控制等。简要介绍叶片典型的涂装体系以及涂装质量、涂料质量的控制。     

其他专用涂料

本发明涉及一种改进了性能的不粘涂料,用于厨房用具的涂装。该不沾涂层体系至少有三层,如面层（6）、中涂层（4）和底涂层（2）。其中,面层（6）含有40％～90％（质量分数,下同）的有机含氟聚合物,而含氟聚合物中有20％~50％的组分为聚四氟乙烯（PTFE）：     

电绝缘涂料——改善表面性能的电绝缘耐热涂料：DE 102 006 061 940

题述用于金属和陶瓷表面的涂料含由一种聚合物基料[含≥60％（质量分数，下同）热塑性聚合物（燃烧温度≥300℃）和高达30％的氟聚合物]和0．5%～30％金属氧化物填料组成的5～100um的表面涂层。将一种由中间涂层（膜厚≥5um）和D30um表面涂层组成的典型双层涂料依次涂覆浸泡过水分散体的玻璃、陶瓷或金属底材，然后于300℃加热。     

防腐涂料的表面处理

1表面预处理的重要性 为使防腐蚀涂料良好地附着于被涂表面,在涂装前要对被涂表面进行一定的表面预处理。表面预处理的质量对涂层的寿命起着重要的作用,有人分析认为表面预处理质量好坏对涂层寿命的影响程度约占50％。钢铁表面往往有锈蚀、氧化皮、油污等存在。锈蚀的直接影响是减少了涂料与表面的接触面积,结果是涂层对钢表面的附着力降低。     

佛山市顺德新城区降水中污染物的监测和分析

为掌握佛山市顺德新城区降水中污染物的情况,2015年7月至8月,文章作者分别在雨天进行了降水取样,对降水中的pH、电导率、常见阴离子(F-、Cl~-、NO_3~(2-)、SO_4~(2-))及部分重金属(铅和镉)进行监测分析。选择有相关数据的珠江三角洲和石家庄、厦门等地的降水中污染物的情况进行对比。结果表明,顺德新城区降水中的p H和部分阴离子浓度优于珠江三角洲平均值,酸雨类型属于硫酸和硝酸混合型;其水体洁净程度略差于石家庄;铅和镉的浓度也高于厦门,甚至部分超出了人体能直接接触的安全范围。     

Metabolism of trideuterated iso-lignoceric acid in rats in Vivo and in human fibroblasts in culture

Saturated very long chain fatty acids (fatty acids with greater than 22 carbon atoms; VLCFA) accumulate in peroxisomal disorders, but there is little information on their turnover in patients. To determine the suitability of using stable isotope-labeled VLCFA in patients with these disorders, the metabolism of 22-methyl[23,23,23-²H₃]tricosanoic (iso-lignoceric) acid was studied in rats in vivo and in human skin fibroblasts in culture. The deuterated iso-VLCFA was degraded to the corresponding 16- and 18-carbon iso-fatty acids by rats in vivo and by normal human skin fibroblasts in culture, but there was little or no degradation in peroxisome-deficient (Zellweger’s syndrome) fibroblasts, indicating that its oxidation was peroxisomal. Neither the 14-, 20-, and 22-carbon iso-fatty acids nor the corresponding odd-chain metabolites could be detected. In the rat, the organ containing most of the iso-lignoceric acid, and its breakdown products, was the liver, whereas negligible amounts were detected in the brain, suggesting that little of the fatty acid crossed the blood-brain barrier. Our data indicate that VLCFA labeled with deuterium at the ω-position of the carbon chain are suitable derivatives for the in vivo investigation of patients with defects in peroxisomal β-oxidation because they are metabolized by the same pathways as the corresponding n-VLCFA. Moreover, as iso-VLCFA and their β-oxidation products are readily separated from the corresponding n-fatty acids by normal chromatographic procedures, the turnover of VLCFA can be more precisely measured. A preliminary report of part of this work (Reference 18) was presented at the 5th International Symposium on the Synthesis and Applications of Isotopes and Isotopically Labelled Compounds, Strasbourg, France, June 20–24, 1994.     

中国粉末涂料行业发展现状之2014

根据国家统计局以及国内外相关机构的数据统计资料,按照自2004年以来的相同数据统计口径,以原材料消耗为基础,编制出我国粉末涂料行业年度数据统计报告,以期为政府制定相关产业政策,企业制定发展规划提供翔实的数据支撑。     

Phospholipid metabolism in cells in culture

The proportions of the different lecithin fractions have been determined in HeLa and KB tissue culture cells and Ehrlich Ascites tumor. 82.8% of the total phosphatidyl choline phosphorus is found in fraction 3 of HeLa cells. The major phosphatidyl cholines found in KB cells and Ehrlich Ascites tumor are in fractions 3 and 4 and representing 66.6% and 88.7% of the total phosphatidyl choline P, respectively. The incorporation of 1,2-¹⁴C-choline and 1,2-¹⁴C-ethanolamine into the various phosphatidyl choline fractions has been assayed to determine their biosynthesis in Ehrlich Ascites tumor. The incorporation of 1,2-¹⁴C-choline into fractions 3 and 4 is 100 times the 1,2-¹⁴C-ethanolamine. This evidence indicates that the methylation pathway of phosphatidyl choline synthesis is very low in HeLa, KB and Ehrlich Ascites cells. One of 13 papers presented at the symposium “Lipid Metabolism in Cells in Culture,” AOCS Meeting, Houston, May 1971. Part of a thesis submitted to the Graduate School of the University of North Dakota in partial fulfillment of the Degree of Master of Science.