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有机硅乳液培训
Wesley JIN, RSS 乳液培训大纲 1. 有机硅基础知识总结 2.乳液基础知识 Emulsion is a category of product form. (乳液是一种产品形态而非功能/用途) In RSS we already have: RTV-使用工艺; Sealant-用途; AAP-用途; Emulsion-A aqueous form of silicones.(多种硅产品的水体系) 2.乳液基础知识 Many products can be made into emulsions. (许多产品可以制成乳液) Silicone;(有机硅) Acrylic;(丙烯酸) Polyurethane;(聚氨酯) … Silicone:(有机硅) Non-reactive oil(不反应性的硅油): 47V, etc. Reactive oil(反应性的硅油): 48V, H68, 11367, etc. 2.乳液基础知识 Advantages(优点) Water-based, safety, environmental economical;(安全环保经济) Water dilutalbe, easy to use;(可用水稀释,便于使用) Safe in transportation, storage and application;(安全) Enable small and uniform quantity of coating on the substrate.(容易在基材上形成薄而均匀的涂层) Disadvantages(缺点) Sensitive to chemical, thermal mechanical environment;(对化学、热和力环境敏感) Can‘t be applied in a system which is not compatible with water.(不能用于与水不相容的体系) 2.乳液基础知识 Classification(分类) According to phase distribution(根据相态分布) Oil-in-water; (水包油) Water-in-oil;(油包水) According to emulsifier applied(根据乳化剂) Anionic: pH7; (阴离子) Cationic: pH7;(阳离子) Non-ionic: wide PH range; (非离子) 2.乳液基础知识 Appearance:(外观) Package:(包装) Plastic drum(塑料桶): 30L, 220L Coated Steel container(带内涂层的钢桶): 2.乳液基础知识 Emulsifiers: always contains hydrophilic group and lipophilic group on the same molecule. Non ionic(非离子型): less sensitive to hard water; good chemical stability; large PS. Ionic(离子型): Anionic(阴离子型): small PS; good mechanical stability; sensitive to hard water. Cationic(阳离子型): less sensitive to hard water and acid condition. Amphoteric(两性): expensive Colloidal polymer(胶体聚合物): PVA 2.乳液基础知识 Non ionic emulsifiers(非离子型) Example(例如): TERGITOL NP 9/30 2.乳液基础知识 Ionic Emulsifiers(离子型) Example(例如): SIPON LCS 95 CH3 - (CH2)n - (SO4)- - (Na+) n=9 Other ionic emulsions: Siponate DS-4 Triton X-200 2.乳液基础知识 2.乳液基础知识 Steric Hindrance(空间位阻) 2.乳液基础知识 Double electrode layer(双电层) 2.乳液基础知识 Destabilization mechanism(破乳机理) 1- Ostwald diffusion:溶解扩散 The oil transfer from the small to the large droplets requires a slight s
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