...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Surface Coatings International, Part B. Coatings Transactions: The Science and Technology of Paints, Inks and Related Coatings and their Raw Materials >Scratch- and mar-resistant refinish two-pack clear coats - linear versus branched acrylics
【24h】

Scratch- and mar-resistant refinish two-pack clear coats - linear versus branched acrylics

机译：防刮擦和防划伤的两包透明涂料-线性与支化丙烯酸

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The new generation clear coats introduced in the automotive industry have improved scratch and mar resistance.It is -believed that those properties are related to the introduction of new binder technologies leading to higher film cross-link densities.This was relatively easy to accomplish in the automotive industry because baking temperatures are well above the glass-transition temperature (T_g) of the final clear coat film.In car repair coatings,the cross-linking takes place under conditions where the intermediate and/or final film T_g values are above the curing -temperature.Such formulations result in vitrification during the drying process,a transition during which chemical cure and solvent release are slowed down substantially.The chemical cure can be improved through more reactive and/or higher functional binders,but this shifts the gel point to shorter times in the drying cycle which may lead to more solvent entrapment,resulting in low film hardnesses and paint defects.This paper describes the overall properties of 2K refinish clear coats based on linear versus branched,random and graft acrylic polyols.The authors will try to correlate overall properties with theoretical predictions and practical results.
机译：在汽车工业中引入的新一代透明涂料具有更好的抗划伤性和耐擦伤性。人们认为这些性能与引入新粘合剂技术有关，从而导致更高的薄膜交联密度。因为烘烤温度远高于最终透明涂膜的玻璃化转变温度（T_g），所以在汽车工业中使用。在汽车维修涂料中，交联发生在中间和/或最终膜T_g值高于固化值的条件下这种配方会在干燥过程中导致玻璃化，在此过渡过程中化学固化和溶剂释放会大大减慢。可以通过反应性更高和/或功能更高的粘合剂来改善化学固化，但这会将胶凝点转变为干燥周期较短，可能导致更多的溶剂截留，导致漆膜硬度低和油漆缺陷。 r描述了基于直链，支链，无规和接枝丙烯酸多元醇的2K修补漆清漆的整体性能。作者将尝试将整体性能与理论预测和实际结果相关联。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号