石英砂及造粒工艺对水包水多彩涂料彩粒稳定性的影响研究  

Study on the Influence of Quartz Sand and Granulation Process on the Stability of Color Particles of W/W Multicolor Coatings

作　　者：彭红 毛伟杰 Peng Hong;Mao Weijie(Chongqing Jianzhu College,Chongqing 400070,China;Gacmotor Co.,Ltd.,Yichang Branch,Yichang,Hubei 443007,China)

机构地区：[1]重庆建筑工程职业学院,重庆400070 [2]广州汽车集团乘用车有限公司宜昌分公司,湖北宜昌443007

出　　处：《涂料工业》2021年第1期13-20,共8页Paint & Coatings Industry

基　　金：国家自然科学基金项目(51672107);重庆市建设科技计划项目[城科字2018第(2-43)号]。

摘　　要：以提高水包水多彩涂料的彩粒稳定性为目标,以石英砂及造粒工艺为对象,研究分析石英砂掺量、颗粒级配及造粒工艺对彩粒成粒效果及渗色性能的影响规律。结果表明:分散相中当石英砂掺量取30%~50%、颗粒级配以中小尺寸粒径搭配时,制得的彩粒尺寸及强度适中、抗渗色能力较强,喷涂顺畅且无流挂;在分散相中掺入适量空心玻璃微珠对彩粒沉底后通过搅拌再次分散起到积极作用;清漆体系中当石英砂掺量取25%~45%、颗粒级配以小尺寸粒径搭配时,制得的涂层质感效果明显、色彩饱满度高,体系贮存稳定;造粒工艺应结合所需彩粒的外观、形态、大小等因素综合确定,其中分散工具的刀片不宜过多过窄,搅拌速度不宜超过400r/min,搅拌时间不宜超过60s。With the goal of improving the stability of color particles of w/w multicolor coatings,quartz sand and granulation process was selected as the object to study and analyze the effects of quartz sand content,particle grading and granulation technology on the color particle formation and bleeding performance of color particles.The test results showed that when the quartz sand content in the dispersed phase was 30%-50%and its particle size was in small and medium-sized ranges,the prepared color particles showed moderate size and strength,with strong anti-bleeding ability,which could be sprayed smoothly without sagging.Incorporation of an appropriate amount of lightweight quartz sand into the dispersed phase played a positive role in re-dispersing the color particles settling to the bottom by stirring.In the varnish system,when the quartz sand content was 25%-45%,the particle size of which was matched with the small size color particle size, the prepared coatings presented distinctivetexture effect, high color saturation and storage stability of the system. The granulation processshould be determined based on the appearance, shapes, size and other factors of the requiredcolor granules, of which the blade on the stirrer should not be too many or too narrow, with thestirring speed and time not exceed 400 r/min and 60 s.

关 键 词：石英砂 造粒工艺 水包水多彩涂料 成粒效果 渗色性能 稳定性 

分 类 号：TQ635.5[化学工程—精细化工]