Abstract
To study the effect and the water-resistance of silane coupling agents having various organofunctional and hydrolyzable groups, the tensile bond strength of acrylic resin to glass plate treated with the silanes was measured.The silanes used were 3-methacryloxypropyl-trialkoxysilane(3-MPS), -triisocyanatosilane(3-MPSN), -trichlorosilane(3-MPSC3), -methyldichlorosilane(3-MPSC2), -dimethylchlorosilane(3-MPSC1), Vinyl-trialkoxysilane(VS), -triisocyanatosilane(VSN), and-trichlorosilane(VSC).Treatment of 3-MPSC3, 3-MPSN, VSC and VSN, which have three active hydrolyzable groups, showed a good effect and water-resistance.The tensile bond strength of the resin to glass plates treated with 3-MPS, 3-MPSC1 and 3-MPSC2 were similar to that of 3-MPSC3 after immersion in water at 37℃ for 60 days, but decreased after 2000 thermal cycles between a 4℃ and 60℃ water bath for 1 minute at each temperature.VS showed no effect.In spite of the difference of the organofunctional groups, the silanes having three active hydrolyzable groups showed better water-resistant adhesion, and the substitution of the hydrolyzable group to hydrophobic group on silicon decreased the effect of the treatment and the water-resistance.
