Aqueous fluid absorbing polymer beads produced from a suspension polymerization of water soluble monomers and methods for improving the hydration rate of such beads
CA 1313175 C · Owner: Chonde, Yohannes · Inventors: Stanley, Frederick W. Jr.; Chonde, Yohannes; Lamphere, Jack C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to suspension polymerization processes, to aqueous fluid-absorbing polymer beads prodiced from those processes to, suspending agents employed in said processes and to a method of using wetting agents to improve the hydration rate of the aqueous fluid-absorbing polymer beads. Wetting agents such as polyols which do not reduce the surface tension of a supernate (provided by a standard test method) below 56 dynes/cm, can improve the hydration rate of aqueous fluid absorbent polymer beads produced by a suspension polymerization process. The wetting agent is useful in a water-in-oil suspension polymerization process wherein the suspending agent comprises a fumed silica …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2010.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.