Optimisation of radiation-curing coatings with silicone-based additives
含硅添加剂对辐射固化涂料的优化
Silicone additives improve the surface properties of radiation-curing coatings. Researchers at BYK Chemie, including Marc Eberhardt, Guillaume Jaunky and Albert Frank, are investigating how they can optimise the adhesion, durability and processability of UV- and electron-beam-curing paints.
有机硅添加剂改善了辐射固化涂料的表面性能.毕克化学的研究人员们,正在研究如何优化UV和电子束固化涂料的附着力、耐久性和可加工性。
Silicone-based additives optimise the smoothness, scratch resistance and adhesion of radiation-curing coatings.
图:硅基添加剂优化辐射固化涂料的光滑度,抗划伤性和附着力.
Radiation-cured coatings, which are cured using UV or electron beam (EB) curing, are known for their fast curing times, environmental friendliness and high surface quality. They are used extensively in the printing and packaging industry, where they provide enhanced durability and visual appeal. However, to achieve optimal properties such as wetting, slip and mar resistance, specialised additives are required. Silicone-based additives play a critical role here by reducing surface tension and improving the leveling of the coating. This results in uniform, defect-free paint layers without cratering or pinholing.
辐射固化涂料采用UV或电子束（EB）固化,以其固化时间快、环境友好和表面质量高而闻名,可广泛用于印刷和包装行业,为其增强耐用性和视觉吸引力.通常,为了实现润湿/防滑/耐腐蚀等性能的最大化,需要专门的添加剂.硅基添加剂可帮助涂料形成均匀无缺陷无坑洞/无针孔的平面,在降低表面张力和提高涂层的流平度方面起着关键作用.
Silicone polymers, especially polydimethylsiloxane (PDMS), tend to migrate to the surface of the coating due to their incompatibility with organic binders. While this migration improves wetting properties and prevents foaming, it can lead to undesirable effects. To circumvent this problem, PDMS molecules are chemically modified so that they bind into the lacquer matrix and provide lasting functional properties such as slip resistance and non-stick effects.
有机硅聚合物,特别是聚二甲基硅氧烷（PDMS）,由于与有机粘合剂不相容,倾向于迁移到涂层表面,尽管这种迁移可以改善润湿性能并防止起泡,但它可能导致不良影响.为了解决这个问题,可对PDMS分子进行化学改性,使其能与漆基体结合,并提供持久的防滑/不沾功能特性等。
Silicone additives for organic coatings
The integration of silicone-based additives into organic coatings enables improved control of surface energy. This is particularly important for packaging coatings or functional coatings that need to be easy to clean or resistant to chemicals. The additives also improve the tape release function by creating a surface with low adhesion. It is essential that the coating formulation and the adhesives on the packaging films are compatible. Silicone additives prevent adhesives from adhering to the coating layer or leaving residues, which improves the quality of the end product and optimises processing.
用于有机涂料的硅添加剂
将硅添加剂集成到有机涂料中,可以改善对表面能量的控制,这对有易清洁或耐化学性要求的包装涂料/功能性涂料尤其重要.添加剂还可通过降低表面粘性,来改善胶带释放功能.此外,包装膜上的涂料配方和粘合剂的相容性至关重要,有机硅添加剂防止粘合剂粘附在涂层上或形成残留,从而提高最终产品的质量并优化加工。
Regulatory requirements and environmental aspects
Strict regulations must be observed when formulating new silicone-based additives. Particularly relevant here are the EU regulations on siloxanes (D4, D5, D6), which limit the content of these substances to below 0.1% in order to avoid classification as a substance of very high concern (SVHC). In addition, additives for packaging coatings must meet the requirements of the Swiss Ordinance on Materials and Articles to Ensure their Suitability for Food Contact. These stringent regulatory requirements call for innovative formulation technologies that combine environmental friendliness with high performance.
A key aspect for the effectiveness of these additives is their chemical reactivity. Modern silicone-based additives contain radical-crosslinkable groups that form covalent bonds with the coating during curing. This ensures that the functional properties are maintained over the long term and that migration into adjacent layers, such as adhesives or films, is minimized. New formulation technologies allow for more precise control of the chemical structure of these additives, so that they can be specifically optimized for different applications, from high-gloss coatings to functional protective layers.
法规及环保要求
新硅基添加剂的研发使用,必须严格遵守相关规定.例如欧盟关于硅氧烷（D4, D5, D6）的法规要求将含量控制在0.1%以下,以避免被归类为高度关注物质（SVHC）;用于包装涂料的添加剂必须符合瑞士《材料和物品条例》的要求,以确保其与食品接触的适宜性等等.严格的监管要求创新的配方技术,以便将环保与高性能结合起来.
化学反应性是添加剂有效性的关键,现代硅基添加剂含有自由基交联基团,可在固化过程中与涂层形成共价键,以便最大限度减少向相邻层（如粘合剂或薄膜）的迁移及长期保持功能特性.新的配方技术允许更精确地控制这些添加剂的化学结构,方便针对高光或者保护性等不同的应用进行专门优化.
备注:
本文章原文来自欧洲涂料网站:
https://www.european-coatings.com/news/coatings-technologies/optimisation-of-radiation-curing-coatings-with-silicone-based-additives/
最初发布时间:19.03.2025
图片来源:BYK
引文来自:Eberhardt et al., PCI & BYK Chemie, 2025
翻译为广州九维提供. |
