Method for removal of residual monomers from water-absorbing polymer particles

US9434802B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-9434802-B2
Application numberUS-201414762026-A
CountryUS
Kind codeB2
Filing dateJan 20, 2014
Priority dateJan 30, 2013
Publication dateSep 6, 2016
Grant dateSep 6, 2016

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Abstract

Official abstract text for this publication.

A process for removing residual monomers from water-absorbing polymer particles by thermally aftertreating the water-absorbing polymer particles in a mixer with rotating mixing tools at a temperature of at least 60° C. in the presence of water and of a surfactant.

First claim

Opening claim text (preview).

The invention claimed is: 1. A process for removing residual monomers from water-absorbing polymer particles by thermally aftertreating the water-absorbing polymer particles in a mixer having rotating mixing tools, the water-absorbing polymer particles during the thermal aftertreatment having a temperature of at least 60° C. and a water content of at least 8% by weight, with addition of water or an aqueous solution before or during the thermal aftertreatment and/or of a steam-compr…

Assignees

Inventors

Classifications

  • Chemistry & Metallurgy · mapped topic

  • Chemistry & Metallurgy · mapped topic

  • Chemistry & Metallurgy · mapped topic

  • C08F220/06Primary

    Chemistry & Metallurgy · mapped topic

  • Chemistry & Metallurgy · mapped topic

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What does patent US9434802B2 cover?
A process for removing residual monomers from water-absorbing polymer particles by thermally aftertreating the water-absorbing polymer particles in a mixer with rotating mixing tools at a temperature of at least 60° C. in the presence of water and of a surfactant.
Who is the assignee on this patent?
Basf Se
What technology area does this patent fall under?
Primary CPC classification C08F220/06. Mapped technology areas include Chemistry & Metallurgy.
When was this patent published?
Publication date Tue Sep 06 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).