Yang, H. M.; Sun, S. H.; Yang, W. T.; Wang, W.; Zhang. Y. B.; Shang, X. H.; Wang, S. W. Preparation and application research of a defect-detectable polyurethane primer. Polym. Bull. (in Chinese), 2025, 38(6), 922-930.
Yang, H. M.; Sun, S. H.; Yang, W. T.; Wang, W.; Zhang. Y. B.; Shang, X. H.; Wang, S. W. Preparation and application research of a defect-detectable polyurethane primer. Polym. Bull. (in Chinese), 2025, 38(6), 922-930. DOI: 10.14028/j.cnki.1003-3726.2025.24.389.
Preparation and Application Research of a Defect-detectable Polyurethane Primer
In order to solve the problem of difficulty in detecting the defects of primers covered by sealants during the installation and use of automobiles
this study used graphene oxide and polyurethane containing naphthalene rings as raw materials to independently synthesize a high-performance conductive polyurethane primer (MCPU-GO) by constructing a
π
-
π
conjugate system. Through infrared spectroscopy analysis and characterization of the mechanical and electrical conductivity properties
it was found that the adhesive strength of this primer can reach 1.03 MPa (Henkel’s is 0.8 MPa)
the surface drying time is less than 2 min
and the resistance is 4.2×10
5
Ω. It can detect damage to the primer layer by detecting changes in the current/resistance values of the local or overall primer coating
providing a simple and rapid method for detecting the reliability of automotive glass installations. The preparation method of this defect-detectable polyurethane primer has promising prospects for market applications.
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references
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