United States
US 12,702,967 B2
Particulate water-absorbing agent and method for producing the same
US 12,702,967 B2 is a granted patent from the United States Patent and Trademark Office (USPTO), dated 2026-08-11. Applicant: NIPPON SHOKUBAI CO., LTD. Its PDF downloads from this page without an account, up to 5 a day.
- Applicant
- NIPPON SHOKUBAI CO., LTD.
- Inventors
- Satoshi MATSUMOTO; Kanako TSURU; Taishi KOBAYASHI; Daisuke TAKAGI; Kazushi TORII
- Publication date
- 2026-08-11
- Filing date
- 2022-05-03
- Document type
- B2 Granted patent
- Also written as
- US 12,702,967 B2 · US12702967 · 12702967
Abstract
[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…
The opening of the abstract. The full text is in the PDF.
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