Method for production of porous cross-linked polymer sheet

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 9/00 (2006.01) C08J 9/36 (2006.01) F26B 13/10 (2006.01) F26B 13/24 (2006.01)

Patent

CA 2393790

AbstractA method for dehydrating a porous cross-linked polymer conveniently to a low final water content is provided. A porous cross-linked polymer sheet is produced by a method which comprises causing a porous cross-linked polymer obtained by forming and polymerizing a water-in-oil type higher internal phase emulsion to be dehydrated by the use of non-woven fabric rolls furnished with an aspiration mechanism. Properly in this case, the porous cross-linked polymer is subjected to preliminary squeezing. In accordance with the present invention, a porous cross-linked polymer abounding in a water absorbing property to be dehydrated to a low final water content with a small number of rolls.

L'invention concerne un procédé de déshydratation approprié d'un polymère réticulé poreux de manière à parvenir à un contenu final en eau faible. Un procédé permettant de produire une feuille polymère réticulée poreuse consiste à provoquer la déshydratation d'un polymère réticulé poreux obtenu par formation et polymérisation d'une émulsion de type eau dans huile à phase interne plus élevée, à l'aide de rouleaux de tissus non tissés amenés par un mécanisme d'aspiration. Dans ce cas déterminé, le polymère réticulé poreux est soumis à un serrage. Selon la présente invention, on obtient un polymère réticulé poreux qui présente une propriété d'absorption d'eau et qui est déshydraté jusqu'à parvenir à un contenu final en eau faible, avec peu de rouleaux.

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