COPYRIGHT©广州慧正云科技有限公司 www.hzeyun.com 粤ICP备18136962号 增值电信业务经营许可证:粤B2-20201000
Researchers found that the introduction of KH-792 as a coupling agent significantly enhances the mechanical properties of the WPU coatings.
Die Forschung beweist, dass die WPU-Beschichtung mit 3 wt% KH-792 eine au-ergewöhnliche Korrosionsbest-ndigkeit aufweist. Source: CaptureAndCompose - stock.adobe.com
Due to the increased presence of hydrophilic groups in waterborne polyurethane (WPU) coatings, consequently leading to compromised corrosion resistance and reduced service life. To solve the problem, a series of waterborne polyurethanes were synthesized via internal emulsification using dicyclohexylmethane diisocyanate (HMDI) and polytetrahydrofuran ether diol (PTMG) as the primary raw materials. The triethanolamine (TEOA) was used as a crosslinking agent and corrosion inhibitor, while N- (β-aminoethyl) -γ-aminopropyl trimethyl-(ethyl) oxy-silane (KH-792) was introduced as a coupling agent to establish a system with a dual crosslinking structure.
The crosslinking degree of the double network structure can be adjusted by changing the amount of KH-792. Then the influence of KH-792 content on the performance of SWPU dispersions and film were studied. The research shows that the waterborne polyurethane with a KH-792 content of 3 wt% exhibits exceptional mechanical strength, reaching 34.64 MPa, with only 3.32 % water absorption and an adhesion strength of 2.64 MPa. Furthermore, it exhibited a high impedance modulus (2976.4 Ω/cm2) at low frequencies. Therefore, this compound holds promising potential for application in anti-corrosion coatings field.
Source: Progress in Organic Coatings Volume 197, December 2024, 108784
慧乐居欢迎您关注中国家居产业，与我们一起共同讨论产业话题。
投稿报料及媒体合作
E-mail：luning@ibuychem.com
