| 摘要 |
A THIN AND HIGHLY TRANSPARENT COATING HAVING EXCELLENT AIR TIGHTNESS, ADHESION TO A SUBSTRATE, LUBRICATING PROPERTIES, GALLING RESISTANCE, AND CORROSION RESISTANCE IS FORMED ON THE SURFACE OF A METAL SUBSTRATE AND PARTICULARLY ON THE SURFACE OF A THREADED JOINT WHICH IS USED FOR CONNECTION OF OIL COUNTRY TUBULAR GOODS. A PHOTOCURABLE COMPOSITION COMPRISING (A) A PHOTOCURABLE (METH) ACRYLATE RESIN, (B) A (METH) ACRYLATE MONOMER SELECTED FROM A MONOFUNCTIONAL (METH) ACRYLATE MONOMER AND A DIFUNCTIONAL (METH) ACRYLATE MONOMER, (C) A TRIFUNCTIONAL OR HIGHER MULTIFUNCTIONAL (METH) ACRYLATE MONOMER, (D) A PHOTOPOLYMERIZATION INITIATOR, (E) A BENZOTRIAZOLE ANTICORROSIVE AGENT, (F) AN ANTICORROSIVE PIGMENT SELECTED FROM A PHOSPHATE ANTICORROSIVE PIGMENT AND CALCIUM ION-EXCHANGED SILICA, AND (G) A PHOSPHATE ESTER IS USED TO FORM A PHOTOCURED COATING. (FIG. 1) |
