WATER-BASED SURFACE TREATMENT COMPOSITION FOR ALUMINUM MATERIAL

• Main Authors: KAWAMURA, Kenta, YAMASHITA, Tsuyoki, SATO, Takeshi, IKO, Tomohiro
• Format: Patent
• Language: English; French; Japanese
• Published: 14.09.2023
• Subjects: ADHESIVES; BLASTING; CHEMICAL PAINT OR INK REMOVERS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CORRECTING FLUIDS; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; DIFFUSION TREATMENT OF METALLIC MATERIAL; DYES; FILLING PASTES; HEAT EXCHANGE IN GENERAL; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INKS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; USE OF MATERIALS THEREFOR; WEAPONS; WOODSTAINS

Provided is a water-based surface treatment composition for an aluminum material capable of forming a coating film having excellent corrosion resistance, especially pitting corrosion resistance. The water-based surface treatment composition for an aluminum material contains a resin (A) having a glass transition temperature of 35°C or more and a tensile storage modulus at 25°C of from 200 MPa to 2000 MPa. L'invention concerne une composition de traitement de surface à base d'eau pour un matériau d'aluminium capable de former un film de revêtement ayant une excellente résistance à la corrosion, en particulier une résistance à la corrosion par piqûres. La composition de traitement de surface à base d'eau pour un matériau d'aluminium contient une résine (A) ayant une température de transition vitreuse de 35 °C ou plus et un module de conservation à la traction à 25 °C de 200 MPa à 2000 MPa. 優れた耐食性、特に耐孔食性を有する皮膜を形成可能なアルミニウム材用水系表面処理組成物を提供する。ガラス転移温度が３５℃以上であって、２５℃での引張貯蔵弾性率が２００ＭＰａ以上２０００ＭＰａ以下の樹脂（Ａ）を含むアルミニウム材用水系表面処理組成物（Ｘ）。