美國
US 12,702,967 B2
Particulate water-absorbing agent and method for producing the same
US 12,702,967 B2 是美國專利商標局（USPTO）的核准專利，日期 2026-08-11。申請人：NIPPON SHOKUBAI CO., LTD.。PDF 可在本頁下載，未登入每天最多 5 篇。
- 申請人
- NIPPON SHOKUBAI CO., LTD.
- 發明人
- Satoshi MATSUMOTO; Kanako TSURU; Taishi KOBAYASHI; Daisuke TAKAGI; Kazushi TORII
- 公開日
- 2026-08-11
- 申請日
- 2022-05-03
- 文件種類
- B2 核准公告
- 也寫作
- US 12,702,967 B2 · US12702967 · 12702967
摘要
[Problem] In an embodiment involving addition of a chelating agent in an upstream process of the process for production, such as the polymerization step, the residual ratio of the chelating agent in the final product, a particulate water-absorbing agent, is improved. [Solution] A particulate water-absorbing agent having a poly(meth)acrylic acid (salt)-based water-absorbing resin as a main component, containing a chelating agent having a nitrogen atom and an inorganic reducing agent having a sulfur atom, wherein the particulate water-absorbing agent has a chelating agent ratio of 0.8 to 1.8, as…
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專利局網站： 美國專利商標局（USPTO）