K涂料助剂介绍1027

1、29/06/97byk-chemie,shanghai1byk涂料助剂简介29/06/97byk-chemie,shanghai2颜料润湿和分散助剂n颜料润湿和分散的基本原理n颜料润湿和分散助剂的分类29/06/97byk-chemie,shanghai3颜料的聚集形态n聚集体n附聚体n原始颗粒29/06/97byk-chemie,shanghai4颜料的分散过程润湿 分散 稳定 29/06/97byk-chemie,shanghai5颜料的润湿速度washburn 公式 3 3 v=k gfl cos r/l h v-润湿速度 k-常数gfl-液相表面张力 -接触角r-颜料孔隙半径 l-颜料

2、孔隙长度h-液相粘度 gfl cos -铺展压力 29/06/97byk-chemie,shanghai6颜料分散体的稳定原理n同电荷相斥n空间位阻29/06/97byk-chemie,shanghai7颜料润湿分散剂的分类 解絮凝型 受控絮凝型29/06/97byk-chemie,shanghai8解絮凝型颜料润湿分散剂n低分子量聚合物型n高分子量聚合物型接枝共聚物嵌段共聚物29/06/97byk-chemie,shanghai9两类润湿分散剂的特性n解絮凝型l牛顿型流动l流平性好l光泽高l着色力高l透明性好/遮盖力强l色相稳定 主要用于面漆n受控絮凝型l触变型流动l防流挂性好l防颜料沉淀l

3、防浮色发花主要用于底漆或中间涂料29/06/97byk-chemie,shanghai10byk颜料润湿分散剂n低分子量聚合物型 (解絮凝型）lanti-terra-uanti-terra-ulbykumenbykumenllactimonlactimonldisperbyk-103disperbyk-103ldisperbyk-108disperbyk-108ldisperbyk-115disperbyk-115ldisperbyk-130disperbyk-130lbyk-220sbyk-220sldisperbyk-110disperbyk-110ldisperbyk-111disper

4、byk-111ldisperbyk-180disperbyk-18029/06/97byk-chemie,shanghai11byk颜料润湿分散剂n高分子量聚合物型 （解絮凝型） ldisperbyk-160disperbyk-160ldisperbyk-161disperbyk-161ldisperbyk-162disperbyk-162ldisperbyk-163disperbyk-163ldisperbyk-164disperbyk-164ldisperbyk-166disperbyk-166ldisperbyk-167disperbyk-167ldisperbyk-170disperb

5、yk-170ldisperbyk-174disperbyk-174ldisperbyk-182disperbyk-18229/06/97byk-chemie,shanghai12byk颜料润湿分散剂n受控絮凝型lanti-terra-203anti-terra-203lanti-terra-204anti-terra-204lanti-terra-panti-terra-plbyk-p104byk-p104lbyk-p104sbyk-p104slbyk-p105byk-p105ldisperbykdisperbyk29/06/97byk-chemie,shanghai13byk颜料润湿分散剂-

6、水性体系用 乳液体系 水溶性体系a an nt ti i- -t te er rr ra a- -u u8 80 0a an ny yi i- -t te er rr ra a- -2 20 06 6b by yk k- -p p1 10 04 4s s/ /- -p p1 10 05 5b by yk k- -1 15 51 1b by yk k- -1 15 54 4/ /- -1 15 55 5l la ac ct ti im mo on n- -w ws sd di is sp pe er rb by yk kd di is sp pe er rb by yk k- -1 18 80

7、0d di is sp pe er rb by yk k- -1 18 81 1d di is sp pe er rb by yk k- -1 18 82 2d di is sp pe er rb by yk k- -1 18 83 3/ /- -1 18 85 5d di is sp pe er rb by yk k- -1 18 84 4d di is sp pe er rb by yk k- -1 19 90 029/06/97byk-chemie,shanghai14byk颜料润湿分散剂高分子聚合物型，有电荷控制mw高低较高较低阴离子型阳离子型160166169170161162163

8、/167164115174182/183/185110111180disperbyk-极性17129/06/97byk-chemie,shanghai15byk颜料润湿分散剂低分子聚合物型，无电荷控制mw高低较高较低阴离子型阳离子型电中性型受控絮凝型弱控絮凝型disperbykbyk-p-104(s)bykumenlactimona.t.-204a.t.-203dis.-130a.t.u/dis.-101dis.-107/-108极性29/06/97byk-chemie,shanghai16byk颜料润湿分散剂水性体系用mw高低极性较低阴离子型阳离子型较高dis.-190dis.184dis.

9、-180dis.-181byk-151byk-154/-155disperbykdis.-182/-183/-18529/06/97byk-chemie,shanghai17流平和表面流动控制助剂n流平和表面流动控制原理n流平和表面流动控制助剂29/06/97byk-chemie,shanghai18流平和表面流动控制n流平n表面流动控制施工时施工时表干后表干后无表面流动控制剂有表面流动控制剂有流平剂无流平剂29/06/97byk-chemie,shanghai19流平公式-表面张力是流平的驱动力a0/ /at=k.g.h. t/ /w.h 3 34 4hata0wa0-初始波纹幅度at-流平

10、后波纹幅度k -常数 g -涂料表面张力h h -涂膜厚度 t-流平时间w -波纹波长 h -涂料粘度29/06/97byk-chemie,shanghai20byk流平助剂n丙烯酸酯聚合物类lbyk-354byk-354lbyk-355/-356byk-355/-356lbyk-358/-361byk-358/-361lbyk-380byk-380lbyk-381byk-381lbyk-390byk-390n复合溶剂类lbyketol-okbyketol-oklbyketol-sbyketol-slbyketol-wsbyketol-ws29/06/97byk-chemie,shanghai

11、21byk聚合物型流平剂mw高低极性较低较高byk-354byk-358/-361byk-390byk-355/-356byk-381byk-38029/06/97byk-chemie,shanghai22聚合物型流平剂的用量用量用量% %涂涂膜膜性性能能缩孔，缩孔，橘皮橘皮最佳流平最佳流平雾影增加雾影增加光泽降低光泽降低表面发粘表面发粘重涂性差重涂性差29/06/97byk-chemie,shanghai23表面张力差异引起表面流动缩孔贝纳德窝29/06/97byk-chemie,shanghai24底材润湿性-涂料应用的先决条件涂料表面张力大于底材表面张力-涂料失去润湿涂料表面张力小于底材

12、表面张力-涂料润湿铺展29/06/97byk-chemie,shanghai25有机硅助剂n在涂料表面形成表面张力均匀的薄层 消除表面张力差异防止贝纳德窝形成n降低表面张力避免缩孔n降低表面张力改进对底材的润湿涂料表面张力低于尘粒表面张力29/06/97byk-chemie,shanghai26聚二甲基硅氧烷ch3 ch3 ch3 ch3-si-o- -si-o- -si-ch3ch3 ch3n ch3分子量较小时可以用于涂料降低表面张力并使涂膜表面滑爽，但易引起污染.分子量稍大时与涂料混容性差会使涂膜出现各种弊病.29/06/97byk-chemie,shanghai27改性有机硅表面流动控

13、制助剂 ch3 ch3 ch3 ch3 ch3-si-o- -si-o-si-o- -si- ch3 ch3 ch3nr1r2r2 : 调整表面张力 -ch3，烷基，芳烷基 r1 :改善与涂料的混容性聚醚 调节极性聚酯 耐热性好芳烷基 耐热性好 29/06/97byk-chemie,shanghai28byk表面流动控制助剂强烈降低表面张力 中等降低表面张力 较少降低表面张力b by yk k- -3 30 06 6b by yk k- -3 30 00 0b by yk k- -3 32 20 0b by yk k- -3 30 07 7b by yk k- -3 30 01 1b by y

14、k k- -3 32 22 2b by yk k- -3 31 10 0b by yk k- -3 30 02 2b by yk k- -3 32 23 3b by yk k- -3 33 33 3b by yk k- -3 33 31 1b by yk k- -3 32 25 5b by yk k- -3 34 41 1b by yk k- -3 33 35 5b by yk k- -3 34 44 4可用于水性体系29/06/97byk-chemie,shanghai29byk表面流动控制助剂有机硅表面活性剂官能基有机硅助剂b by yk k- -3 34 45 5b by yk k- -

15、3 37 70 0b by yk k- -3 34 46 6b by yk k- -3 37 71 1b by yk k- -3 34 48 8b by yk k- -3 37 73 3b by yk k- -3 37 75 5可用于水性体系29/06/97byk-chemie,shanghai30byk表面流动控制助剂降低表面张力的能力强弱极性高低373306333307330341344300320325331聚醚改性370310371323322byk-聚酯改性芳烷基改性29/06/97byk-chemie,shanghai31byk表面流动控制助剂29/06/97byk-chemie,

16、shanghai32byk改性有机硅表面助剂的作用n均匀和降低表面张力l防止贝纳德窝，减少桔皮，帮助流平l防止复色漆发花l帮助消光粉和铝粉定向排列l提高防流挂性l防止缩孔l促进底材润湿n增加表面滑爽性l提供表面平滑l防划伤性l防粘连性l增加硬度l缩短表干时间29/06/97byk-chemie,shanghai33涂料的表面张力高些好还是低些好？表面张力高低流平有利不利丰满度有利不利防缩孔不利有利底材润湿不利有利防贝纳德窝不利有利防鬼影有利不利重涂性有利不利消泡有利不利29/06/97byk-chemie,shanghai34结论在满足底材润湿和控制表面流动的前提下, 涂料的表面张力应尽可能地

17、高!29/06/97byk-chemie,shanghai35和流平有关的其它助剂n颜料润湿和分散助剂l解絮凝型l受控絮凝型n流变助剂n消泡剂29/06/97byk-chemie,shanghai36消泡剂n消泡原理n消泡剂的分类29/06/97byk-chemie,shanghai37stokes方程式v r2h气泡越小上升速度越慢粘度越大气泡上升速度越慢v = 气泡上升速度r = 气泡半径h = 介质粘度29/06/97byk-chemie,shanghai38排液效应-纯液体自动消泡膜壁厚度约10纳米时泡沫破裂29/06/97byk-chemie,shanghai39表面活性剂对气泡的稳

18、定作用疏水基（非极性）亲水基(极性）29/06/97byk-chemie,shanghai40静电斥力使气泡稳定+ + + + + + +液体流出+ + + + + + +气泡膜壁膜壁变薄斥力增大29/06/97byk-chemie,shanghai41gibbs弹性使气泡稳定拉伸气泡膜壁浓度减小，表面张力增大29/06/97byk-chemie,shanghai42表面张力和气泡n表面张力的作用使液体有保持最小表面积的趋势表面张力越大，这种趋势越大，气泡不易稳定表面张力越小，这种趋势越小，气泡较易稳定29/06/97byk-chemie,shanghai43消泡剂和脱泡剂的作用场合气泡在表面

19、消泡剂气泡在湿涂膜内脱泡剂涂料粘度小时涂料粘度大时29/06/97byk-chemie,shanghai44消泡剂的作用机理n消泡剂l与体系有一定程度的不相容和不相溶性l有正的进入系数和展布系数29/06/97byk-chemie,shanghai45进入系数和展布系数n进入系数 e = gf + gint - gd gf = 起泡介质的 表面张力 gint= 界面张力 gd = 消泡剂的表面张力n展布系数 s = gf - gint - gd29/06/97byk-chemie,shanghai46脱泡剂的作用机理29/06/97byk-chemie,shanghai47聚二甲基硅氧烷(ch

20、3)3 si o si o si (ch3)3 ch3ch3 x流平表面平滑消泡锤纹效果相容不相容x29/06/97byk-chemie,shanghai48有机改性聚硅氧烷ch3r2ch3r1xy(ch3)3si o si o si o si(ch3)3zr r1 1= =聚醚聚醚r r2 2= =烷基烷基29/06/97byk-chemie,shanghai49有机硅消泡剂稳泡作用最佳点引起弊病稳泡性消泡性相容性好（可溶）相容性差（不溶）29/06/97byk-chemie,shanghai50聚合物类消泡剂产生弊病起泡性消泡性相容性好（可溶）相容性差（不溶）最佳点29/06/97byk-

21、chemie,shanghai51溶剂型涂料用byk消泡剂有有机机硅硅型型聚聚合合物物型型b by yk k- -0 06 65 5b by yk k- -0 05 51 1b by yk k- -0 06 66 6b by yk k- -0 05 52 2b by yk k- -0 07 70 0b by yk k- -0 05 53 3b by yk k- -0 08 88 8b by yk k- -0 05 55 5b by yk k- -1 14 41 1b by yk k- -0 05 57 7b by yk k- -0 02 20 0 b by yk k- -a a5 53 30

22、0b by yk k- -0 08 80 029/06/97byk-chemie,shanghai52溶剂型涂料用byk消泡剂29/06/97byk-chemie,shanghai53有消泡性能的表面助剂有有机机硅硅型型聚聚合合物物型型b by yk k- -0 07 75 5b by yk k- -3 35 54 4b by yk k- -0 07 77 7b by yk k- -3 35 55 5b by yk k- -0 08 85 5b by yk k- -3 35 56 6b by yk k- -3 32 20 0b by yk k- -3 35 58 8b by yk k- -3

23、32 23 3b by yk k- -3 36 61 1b by yk k- -3 32 25 5b by yk k- -3 39 90 029/06/97byk-chemie,shanghai54疏水质点增强水性消泡剂的作用疏水质点捕获表面活性剂分子,使气泡膜更易破裂29/06/97byk-chemie,shanghai55水性涂料用byk消泡剂矿油型有机硅型byk-031byk-031byk-019byk-019byk-027byk-027byk-032byk-032byk-021byk-021byk-045byk-045byk-033byk-033byk-022byk-022byk-020byk-020byk-034byk-034byk-023byk-023byk-080byk-080byk-035byk-035byk-024byk-