アブストラクト（23巻2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Synthesis of Silane Coupling Agents with both 3-Mercapto and Alkenyl Groups in a Molecule
Subtitle　： ORIGINAL ARTICLES
Authors　： Kozo Umemoto, Shigeaki Kurata*
Authors（kana）　：
Organization　： Departments of Dental Materials, Kanagawa Dental College, *Departments of Dental Bioengineering and Biotechnology, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 23
Number　： 2
Page　： 69-72
Year/Month　： 1995 / 9
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： To estimate the effect of water on the adhesive durability of a silane coupling agent, nine novel siloxane oligomers with both mercapto and alkenyl groups were synthesized. To prepare the siloxane oligomers, 3-mercaptopropylmethyldimethoxysilane (SM2), four alkenyl alkoxy silanes, such as 3-methacryloxypropyl-dimethylmethoxysilane (MEI), -methyldimethoxysilane (ME2) and-trimethoxysilane (MM3) and vinyl trimethoxysilane (VM3) were used. To prepare a primer, the siloxane oligomer was diluted with ethanol. The tensile bond strengths of resin to stainless steel treated with sixteen primers were measured after storage in water. The bond strengths of resin to stainless steel treated with four primers, such as 2 wt% SM2-ME1 (Mole ratio of SM2 and ME1 is 1:2), 1% SM2-ME3 (Mole ratio, 3:2) and 1 and 2% SM2-ME3 (Mole ratio, 3:1), were higher than that of a non-treated specimen. The bond strength of the specimen treated with 2 wt% SM2-ME2 (Mole ratio, 2:1) primer was very low compared with that of the non-treated specimen. After a thermo-cycle test of 1,000 cycles, all bond strengths decreased remarkably. The adhesive ability and durability against water depends not only on the degree of siloxane bond but also on the movement of the organofunctional group. The very high degree of siloxane bond is a disadvantage to adhesive ability, because the movement of the organofunctional group of the oligomer may be limited by the very high degree of siloxane bond.
Practice　： Dentistry
Keywords　： Synthesis, 3-mercaptopropylmethyldimethoxysilane, Alkenyl-functional silane, Adhesion, Primer