MUMBAI, India, July 5 -- Intellectual Property India has published a patent application (202517056029 A) filed by Chemetall Gmbh; and Basf Coatings Gmbh, Frankfurt, Germany, on June 10, for 'post-rinse pretreatment with aqueous compositions containing alkaline earth metal ions.'
Inventor(s) include Castle, Laurence; Kolberg, Thomas; Kauling, Lukas; Gelbrich, Thorsten; and Lueckerath, Thorsten.
The application for the patent was published on July 4, under issue no. 27/2025.
According to the abstract released by the Intellectual Property India: "The present invention relates to a method for pretreatment of at least one metal surface of a substrate, method comprising at least steps 1) and 2), namely, contacting the at least one surface of the substrate at least in portion with an acidic aqueous composition AAC, which at least contains fluoride anions in an amount in a range of from 10 to 2000 mg/L, and further comprises at least one metal cation selected from the group consisting of Ti, Zr and Hf ions and mixtures thereof, to form a film at least in portion on said surface (1)), and rinsing the film obtained after step 1) prior to any optional curing and/or drying of said film with an aqueous composition AC, which is different from acidic aqueous composition AAC, and which contains at least one kind of alkaline earth metal ions (2)), a method of applying at least one coating film onto at least one surface of a substrate that has undergone the pretreatment method, a substrate obtainable by these methods, a use of the aqueous composition AC for a various purposes, and a kit-of-parts comprising an acidic aqueous composition AAC and an aqueous composition AC."
The patent application was internationally filed on Nov. 14, 2023, under International application No.PCT/EP2023/081772.
Disclaimer: Curated by HT Syndication.
