顶空-气相色谱法测定溶剂型油墨中22种有机溶剂

目的 建立同时测定现代溶剂型油墨中22种溶剂残留量的检测方法,为溶剂型油墨溶剂残留量的监管提供技术支持。方法 通过优化混合标准工作溶液的配制,采用优化的色谱条件,用HP-INNOWAX毛细管柱分离待测化合物、外标法定量的顶空气相色谱方式检测溶剂型油墨的22种溶剂残留量。结果 22种溶剂均能较好的分离,且呈现良好的线性关系;相关系数均在0.999以上,检出限为0.000 21～0.000 55 mg/m²,回收率为85.92%～102.51%,精密度为0.46%～5.73%。结论 该方法分离度好、灵敏度高、精密度好、准确度高,在实际样品检测中,取得了良好的效果,可为溶剂型油墨溶剂残留量的监管提供技术支持。     

水性醇酸氨基烘烤漆的研制

介绍了一种水性醇酸氨基烘烤漆的研究情况，并与溶剂型醇酸氨基烤漆进行了比较。结果表明：水性醇酸氨基烤漆的漆膜性能均能达到并优于溶剂型醇酸氨基烤漆的漆膜性能。     

Hydrophobic or Hydrophilic Fumed Silica as Filler of Polyurethane Adhesives

Two hydrophilic and two hydrophobic fumed silicas of different characteristics were added to solvent-based polyurethane adhesives (PU). IR spectroscopy, contact angle measurements and rheology (viscosity measurements, determination of viscoelastic properties) were used to monitor the variation of properties of PU adhesives produced by addition of silica. Immediate (green) adhesion was determined by T-peel testing of halogenated synthetic rubber/PU adhesive/halogenated synthetic rubber joints. Silica addition produced a noticeable increase in the PU adhesive viscosity which can be related to the variation of viscoelastic properties. Viscosity of PU adhesives containing hydrophilic silica slightly increased with time after preparation; the increase was less significant in PU adhesives with hydrophilic silica. In the rheological studies, silica imparted shear thinning and negative thixotropy to PU adhesives due to a better dispersion of the silica in the polyurethane during shearing. The addition of silica produces an increase in the storage modulus (G') of PU adhesives, the values obtained being independent of the hydrophilic or hydrophobic nature of the fumed silica. The increase of G' and the changes in tan δ of PU adhesives containing silica corresponded to an improvement in the green adhesion properties of chlorinated rubber/PU adhesive/chlorinated rubber joints. In general, in disagreement with previous results,¹ the presence of silica did affect the properties of solvent-based PU adhesives, but these properties were not dependent on the type of silica (hydrophobic or hydrophilic) used in this study.     

真空镀膜涂料的研究进展

随着塑料装饰镀膜技术和塑料代金属制品的不断发展,真空镀膜技术得到了广泛的应用。文章综述了真空镀膜涂料的组成、作用、基本性能,总结了不同种类传统溶剂型真空镀膜涂料(如环氧树脂型、聚氨酯树脂型、丙烯酸树脂型等涂料)的研究与应用,重点讨论了紫外光固化真空镀膜涂料(如聚氨酯丙烯酸酯型、环氧丙烯酸酯型光固化涂料)的发展状况和研究进展,以及真空镀膜涂料的发展前景与趋势。     

纳米SiO2复合溶剂型地板漆的研制及性能研究

选用纳米SiO2作为消光剂,用硬脂酸进行亲油改性,与丙烯酸树脂、脂肪酸醇酸树脂复合,制备了纳米复合地板漆。测定了其透明性、耐磨性和摆杆硬度。结果表明：添加4％（质量分数）的纳米SiO2,涂膜的耐磨性提高了100％以上,可见光平均透过率大于90％,摆杆硬度平均提高了50％。     

正硅酸乙酯水解液储存的稳定性

采用正硅酸乙酯(TEOS)在酸性条件下水解制备了溶剂型无机硅酸锌底漆的固化剂——TEOS水解液,通过升高储存温度的方法研究了水解度、酸水pH对TEOS水解液储存稳定性的影响。结果表明,以pH=2.5的酸水为催化剂,水解得到水解度为80%的TEOS水解液具有良好的储存稳定性,其在常温下的储存期可达12个月,以此TEOS水解液制备的无机硅酸锌底漆具有表干快、附着力优良、耐蚀性好等特点。     

GB/T25264—2010《溶剂型丙烯酸树脂涂料》的解读与探讨

简单介绍了国家标准《溶剂型丙烯酸树脂涂料》的要求和检测方法,对比目前使用的行业标准提出了不同的建议和意见,使该标准更加完善。     

水溶性丙烯酸氨基烘烤涂料固化反应研究

以一定含量的羟基和羧基水溶性丙烯酸树脂和具有相同含量的羟基和羧基溶剂型丙烯酸树脂作主要成膜物,以氨基树脂作固化剂,配制成相应的水溶性热固型丙烯酸树脂清漆和溶剂型热固丙烯酸树脂清漆。通过DSC测试,判断其固化反应温度的差异。结果发现,水溶性热固型丙烯酸–氨基树脂清漆的固化反应温度比同类溶剂型热固丙烯酸–氨基树脂清漆的高。     

溶剂型丙烯酸酯压敏胶的研制

本文研究了以丙烯酸酯及其衍生物为主要单体，通过自由基聚合反应制备溶剂型丙烯酸酯压敏胶的方法，并确定了最佳配方。