Superabsorbent polymers and products containing them

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 220/04 (2006.01) A61L 15/60 (2006.01)

Patent

CA 2152362

Particulate superabsorbent polymeric material which is a partially neutralised polymer of an ethylenically unsaturated carboxylic monomer cross linked by a triethylenic or higher ethylenic cross linking agent, preferably tetra allyl ammonium chloride, absorbs above 15 grams, and often above 18 grams, aqueous saline per gram polymeric material in 60 minutes under a load of 63,000 dynes per square centimetre. The polymer preferably has surface cross linking caused by contacting the polymer particles with inorganic and/or covalent cross linking agent for the polymer.

Un matériau polymère superabsorbant sous forme de particules est un polymère partiellement neutralisé d'un monomère carboxylique éthyléniquement insaturé, réticulé par un agent de réticulation triéthylènique ou éthylénique supérieur, de préférence du chlorure d'ammonium tétra-allyle, et il absorbe plus de 15 grammes, et souvent plus de 18 grammes de solution saline aqueuse par gramme de matériau polymère, en 60 minutes, sous une charge de 63000 dynes par centimètre carré. De préférence, la réticulation de la surface de ce polymère est provoquée par la mise en contact des particules polymères avec un agent de réticulation inorganique et/ou covalent pour ce polymère.

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