Bayhydrol® UH 2558 is a cosolvent-free aliphatic, anionic polyurethane dispersion used as a binder in the formulation of water-reducible coatings and sealers. This product has a non-volatile content (1g / 1h / 125°C) of 35-39, an Efflux time at 23°C, (4mmcup) of max. 40, and a pH (1:3 in demineralised water) value of 7-9.
The product is characterized by high resistance to yellowing, very good wet film transparency and very good abrasion resistance (taber), where the films are hard but flexible. Post-curing of such coatings with Bayhydur®, for example, brings additional significant advantages and results in waterborne two-component coatings with significantly higher mechanical and chemical resistance. The mixing ratio of mill base to hardener is generally 10:1. Compatibility with affordable PAC dispersions is good but must be tested on a case-by-case basis.
拜耳材料生產水性膠黏劑、高固含塗料、先進粉末塗料和特種密封劑行業的原材料。拜耳生產聚碳酸酯和聚碳酸酯混合物、聚氨酯和TPU樹脂，專門開發用於使用TPU樹脂的設計和加工部件和應用，可幫助產品在各種應用中實現更美的外觀和經久耐用性。
本頁顯示的信息由UL從產品廠商處直接獲得。UL始終在盡最大努力確保此數據的準確性，但是UL對於這些信息中涉及的數值或產品宣稱不承擔任何責任，強烈建議您在最終選擇產品時，就所有信息與廠商進行驗證。
Covestro (formerly Bayer MaterialScience) 科思创目前只在以下作出標識的區域展示其產品資料：
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