PROBLEM TO BE SOLVED: To develop an adhesive improving the bonding strength of the adhesive between an impression material and a tray, showing high bonding strength for any of the trays made from a metal, made from a resin and made from a modeling compound, and especially for the tray made from a resin, and showing high bonding strength even in the case of having the tray surface of a low roughness.SOLUTION: This adhesive of an alginate impression material with the tray for impression is characterized by containing (A) inorganic particles produced by surface-treating with a coupling agent having an amino group and having the amino group on their surfaces, and preferably having &ge0.5/nm2 number of amino groups presenting in the surfaces, and (B) a solvent.COPYRIGHT: (C)2009,JPO&INPIT【課題】印象材とトレーとの間の接着剤の接着力をさらに向上させ、金属製、レジン製およびモデリングコンパウンド製のいずれのトレーに対しても高い接着力を示し、特に、レジン製トレーにおいて、トレー表面の粗さが小さい場合においても高い接着力を示す接着剤を開発すること。【解決手段】(A)分子中にアミノ基を有するカップリング剤により表面処理する等して製造した、表面にアミノ基を有する無機粒子、好適には表面に有するアミノ基数が0.5個以上/nm2であるもの、および(B)溶剤を含んでなることを特徴とする、歯科用アルジネート印象材と印象用トレーとの接着剤。【選択図】なし
