Treatment solution for chromium-free tension coating, method for forming chromium-free tension coating, and grain oriented electrical steel sheet with chromium-free tension coating
US-2018371621-A1 · Dec 27, 2018 · US
Surface Adjuster for Zinc Phosphate Chemical Conversion Treatment
US2025059647A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025059647-A1 |
| Application number | US-202218720964-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 22, 2022 |
| Priority date | Dec 27, 2021 |
| Publication date | Feb 20, 2025 |
| Grant date | — |
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- Title
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Abstract
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The present invention addresses the problem of providing a surface adjuster with which a chemical conversion coating having a surface state in which zinc phosphate crystals are densely packed can be formed even when the zinc phosphate chemical conversion treatment step is performed in a short time. The problem is solved by a surface adjuster for zinc phosphate chemical conversion treatment, which contains: a zinc-containing phosphate (A); an alkali salt (B) of a copolymer (b2) containing a 2-acrylamide-2-methylpropane sulfonic acid unit (b1), in which a ratio of (b1) in the copolymer (b2) is 7.5% by mass to 40.0% by mass; and an aqueous medium (C).
First claim
Opening claim text (preview).
1 . A surface adjuster for zinc phosphate chemical conversion treatment, comprising: a zinc-containing phosphate (A); an alkali salt (B) of a copolymer (b2) containing a 2-acrylamide-2-methylpropane sulfonic acid unit (b1), in which a ratio of (b1) in the copolymer (b2) is 7.5% by mass to 40.0% by mass; and an aqueous medium (C). 2 . The surface adjuster for zinc phosphate chemical conversion treatment according to claim 1 , comprising substantially no hectorite. 3 . A method of producing a metal material having a chemical conversion coating, the method comprising: the surface adjustment step of bringing the surface adjuster for zinc phosphate chemical conversion treatment according to claim 1 into contact with a metal material; and the chemical conversion treatment step of bringing a zinc phosphate chemical conversion treatment agent into contact with the metal material after the surface adjustment step. 4 . A method of producing a metal material having a paint, the method comprising the painting step of forming a paint on or over a surface of a metal material having a chemical conversion coating that is obtained by the method according to claim 3 .
Assignees
Inventors
Classifications
Phosphates of heavy metals · CPC title
Homopolymers or copolymers of amides or imides · CPC title
containing also zinc cations · CPC title
- C23C22/12Primary
containing zinc cations · CPC title
After-treatment · CPC title
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- What does patent US2025059647A1 cover?
- The present invention addresses the problem of providing a surface adjuster with which a chemical conversion coating having a surface state in which zinc phosphate crystals are densely packed can be formed even when the zinc phosphate chemical conversion treatment step is performed in a short time. The problem is solved by a surface adjuster for zinc phosphate chemical conversion treatment, whi…
- Who is the assignee on this patent?
- Nihon Parkerizing
- What technology area does this patent fall under?
- Primary CPC classification C23C22/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Feb 20 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).