含砂多彩涂料彩粒大小与形状的影响因素研究

研究了含砂多彩涂料保护胶的作用机理,以及粒子形状和贮存稳定性的影响因素。讨论了基料保护胶体的用量和纤维素的种类、用量对彩粒大小及贮存稳定性的影响,以及不同砂型级配对含砂多彩涂料彩粒与干膜的影响。     

分散相的组成对水性多彩涂料凝胶彩粒的影响

运用控制变量法,分析了分散相中HEC、保护胶溶液、增稠剂等不同掺量对水性多彩涂料凝胶彩粒成粒效果的影响,重点研究了对凝胶彩粒稳定的影响。当选用弹性乳液,纤维素掺量1%,保护胶溶液掺量3%配制分散相时,制备所得的水性多彩涂料的凝胶彩粒有良好的稳定性,不易渗色。     

水性多彩涂料的制备与应用

详细介绍了水性多彩涂料的制备过程及方法,分析了保护胶的凝胶机理及其对彩粒稳定性的影响,介绍了助剂的选择原理及多彩涂料的施工方法。     

质感型水包水多彩涂料的彩粒稳定性研究

选用亲水性异氰酸酯作为固化剂,硅酸镁锂作为保护胶,以分散体型羟基丙烯酸树脂和聚丙烯酸弹性乳液复配得到分散相,利用硅酸镁锂层间可交换的阳离子与羟乙基纤维素中的羟基之间的“凝胶化”反应,同时辅以羟基丙烯酸树脂与亲水性固化剂的交联作用来制备综合性能优异的质感型水包水多彩涂料。实验结果表明：当乳液复配比在 1∶4且掺量为 30%,固化剂的—NCO与羟基树脂的—OH物质的量之比为 1∶2,高浓度保护胶溶液掺量为 4%时,所制备的彩粒具有强度适中、色彩饱满度高、抗渗色能力较强,施工喷涂顺畅、无流挂,体系贮存稳定等特点,解决了水包水多彩涂料在生产和施工过程中常常出现的彩粒渗色、彩粒易破碎、喷涂均匀性欠佳等问题。     

有机硅改性丙烯酸酯水包水多彩涂料制备及性能测试与影响

针对传统水包水多彩涂料容易出现彩粒渗色、串色、聚集和后增稠稳定性不足的问题,提出用自制有机硅改性丙烯酸酯乳液为基础漆,用有机改性膨润土(GTS)为保护胶制备新型水包水多彩涂料,并对水包水多彩涂料配方进行优化。结果表明：水包水多彩涂料最佳配方为：基础漆中乳液用量28%;羟乙基纤维素用量0.7%;保护胶浓度8%;保护胶与基础漆质量比5∶7;增稠剂用量0.5%;以给配方制备的水包水多彩涂料彩粒边界清晰分明,对比度高,强度好,没有混合和串色现象,装饰效果良好,已经达到了水包水涂料HG/T 4343—2012化工行业标准。     

多彩涂料抗渗色与耐水白性能的影响因素研究

研究了水包水多彩涂料保护胶的作用机理,以及彩色粒子抗渗色与耐水白性能的影响因素。对基料保护胶体用量、乳胶的种类及用量对多彩粒子抗渗色与耐水白性能的影响进行了讨论。     

保护胶体在丙烯酸酯无皂乳液聚合中的研究

以苯乙烯-马来酸酐铵盐水溶性大分子作为保护胶体,通过半连续乳液聚合法合成了综合性能优良的丙烯酸酯无皂乳液.研究了保护胶体对乳液单分散性和成膜性能的影响;研究发现.乳液的单分散性较好,粒径稍大,其中多分散指数PDI为0.097,粒径大小为110.2 nm.并且其成膜性能优良,光泽较高.实验确定了保护胶体的最佳配比用量为8％、引发剂用量为0.6％、甲基丙烯酸缩水甘油酯用量为2％.将该乳液配制咸水性木器清漆具有优异的性能.     

水性多彩涂料彩粒渗色性能研究

利用人工合成锂皂石层状结构中的可交换阳离子与含大量羟基的羟乙基纤维素(HEC)之间的凝胶化反应制备水性多彩涂料。考察了乳液类型和掺量、羟乙基纤维素(HEC)用量、高浓度保护胶用量、助剂和水性色浆种类等对彩粒渗色性能的影响,优化了水性多彩涂料的制备工艺,制备出的水性多彩涂料抗渗色性能优异、彩粒强度高、体系稳定性好。     

包覆丁基甲氧基二苯甲酮固体脂质防晒粒的制备及性能研究

制备了包覆丁基甲氧基二苯甲酮的固体脂质防晒粒,其配方组成为2%氢化蓖麻油、3%聚氧乙烯(21)硬脂醇醚、0.2%聚氧乙烯(2)硬脂醇醚、2%辛酸癸酸三甘油酯及丁基甲氧基二苯甲酮的包覆量为2%时,脂质防晒粒平均粒径在204 nm左右。考察了乳化剂和脂质原料氢化蓖麻油用量对固体脂质防晒粒粒径大小及分布的影响,并比较了固体脂质防晒粒与普通乳状液体系的防晒性能。实验结果表明:适合的乳化剂用量有利于形成粒径较小且均一的固体脂质微粒;随脂质氢化蓖麻油用量的增加,固体脂质微粒的粒径大小及分布系数均增加;包覆防晒剂固体脂质微粒体系的紫外吸收性能及稳定性均明显优于普通乳状液体系。     

岩彩涂料性能影响因素及其对策探析

岩彩涂料,业内也称作水包水、御彩石、多彩漆.简单梳理了岩彩涂料的发展历程和当前配方、生产工艺上的问题,重点探讨可影响该种涂料应用稳定性的因素,分析乳液类别、水性色浆及造粒工艺等因素对岩彩涂料性能所产生的不同影响.     

Analysis of the spectral reflectance and color of mineral pigments affected by their particle size

The color of mineral pigments changes obviously with their particle size. However, how the particle size of these mineral pigments affects the color of the mineral pigment color block remains unclear. Based on optical principles and the physical properties of mineral pigment particles, our analysis found that changes in the particle size not only nonlinearly affect the behavior of light at the first surface of the mineral pigment color block, but also affect the interaction of light with the particles within the body of the mineral pigment color block, ultimately changing the spectral reflectance and color of the mineral pigment color block. Finally, we derived a nonlinear monotonically decreasing relationship between the particle size and the spectral reflectance. The experiment conducted in this article selected six kinds of mineral pigments as color block samples and observed the changes in the spectral reflectance and color value with the particle size. These studies are beneficial for color researchers conducting scientific research related to mineral pigments.     

国产聚乙烯醇助分散剂对悬浮法聚氯乙烯树脂颗粒特性的影响

在聚乙烯醇／羟丙基甲基纤维素复合主分散体系基础上加入聚乙烯醇助分散剂。对比研究了国内外同类型聚乙烯醇对分散体系界面张力、保胶能力和聚氯乙烯树脂颗粒形态的影响。结果发现：随着聚乙烯醇助分散剂含量增加,分散剂水溶液一三氯乙烯界面张力和保胶能力降低,聚氯乙烯树脂平均粒径和增塑剂吸收量增加,初级粒子聚集程度降低。     

Application of multiflux theory based on scattering by nonspherical particles to the problem of modeling optical characteristics of pigmented paint film: Part II

Scattering characteristics of three model systems analogs to red, green, and white pigments containing nonspherical particles are calculated with the T‐matrix method. These scattering parameters are then used to evaluate colorimetric curves of paint films with the multiflux computational technique. Color difference of each system containing different oblate spheroidal‐shaped pigments is calculated with reference to systems containing spherical pigments of equivalent volume. Results show that color‐difference increases for chromatic pigments as shape of pigments deviates from sphericity. Nonabsorbing particle analogs to titanium dioxide behave like spherical particles, though their shape deviates significantly from sphericity. © 2003 Wiley Periodicals, Inc. Col Res Appl, 28, 308–316, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/col.10165     

废水pH对超滤膜过程的影响

研究了pH变化对废水中胶体微粒粒径/粒径分布、Zeta电位及超滤过程中溶液通量衰减指数的影响.结果表明,当废水pH为7.14时,废水中胶体微粒和粒径分布达到最大、滤液中总铁含量小于0.1 mg·L~(-1);当pH大于9.6时,废水中荷负电胶体微粒的Zeta电位达到-32 mV.超滤过程中的溶液通量衰减指数表明,废水pH在弱碱性条件下的超滤膜污染较中性或酸性条件下小.     

Redispersible polymer powder functionalized with NMA and its adhesive properties in dry-mixed coatings

One type of redispersible polymer powder functionalized with N-hydroxymethyl acrylamide (NMA) was developed in this work. The addition of NMA proved to have great influence on the properties of the original emulsion as well as the corresponding powders. The particle size and viscosity of original emulsions both increased with the increasing of NMA amount while the colloidal stability decreased due to the generation of oligomers. However, the fluidity and adhesive performance of the resultant powders were improved obviously by adding more amounts of NMA in polymerization. Taking the above factors into consideration, we found that 3.0?wt.% of total monomers was an acceptable percentage for the NMA to be used. Poly (vinyl alcohol) (PVA) was used as protective colloids in spray drying to prevent the coalescence of emulsion particles so that the reversible dispersion of powders could be realized. The morphology of powder particles was proved to turn into ‘donut’ shape with the increasing of PVA amount, and their reconstitution ability became better. Compared with original emulsion, the reconstituted emulsion had poorer stability and dispersity due to the coalescence of polymer particles in spray drying.     

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

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...     

复合分散体系对聚氯乙烯树脂颗粒特性的影响

以三氯乙烯模拟氯乙烯(VC),考查聚乙烯醇(KH20)/羟丙基甲基纤维素(60SH50)复合分散剂的分散能力和保胶能力,发现分散能力和保胶能力均随分散剂用量的增加而提高;复合分散剂中KH20比例增大,分散能力下降而保胶能力增强。以此为基础进行VC悬浮聚合,研究分散剂对聚氯乙烯(PVC)树脂颗粒特性的影响。发现适量的分散剂可同时提高PVC树脂的表观密度和增塑剂吸收量;增大KH20的比例可提高PVC树脂的表观密度,同时使粒度分布变窄,但是增塑剂吸收量有所下降。     

聚酯—乙烯基共聚物复合水分散液的结构研究

通过多种丙烯酸酯与苯乙烯的原位聚合反应制备了大分子链中含有羧基的水性自乳化聚酯－乙烯基共聚物的复合物，然后加入三乙胺中和及氨基树脂等制备了聚酯－乙烯基共聚物复合水分散液，通过FTIR与1H NMR进行了表征，实验结果表明，在单体原位聚合改性聚酯的过程中，同时生成聚酯的接枝共聚物，它们有助于复合水分散液的稳定性，进一步研究了由不同量的三乙胺中和得到的复合水分散液的粒子形态，发现在中和度较低的情况下，粒径分布宽，粒径较大但形状规整，在大粒子中间形成清晰的核壳两相结构，在中和度较高的情况下，粒径分布较窄，粒径较小但形状不规整，两相间的区别不十分明显。