Porous, absorbent, polymeric macrostructures and methods of...

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A61L 15/60 (2006.01) A61F 13/15 (2006.01) A61L 15/22 (2006.01) A61L 15/42 (2006.01) B32B 7/02 (2006.01) C08J 3/24 (2006.01) C08J 9/16 (2006.01) C08J 9/28 (2006.01)

Patent

CA 2078560

Absorbent polymeric macrostructures (52) that are porous and comprise an interparticle crosslinked aggregate having a circumscribed dry volume greater than about 10.0 mm3. The interparticle crosslinked aggregate comprises a multiplicity of precursor particles of substantially water-insoluble, absorbent, hydrogel- forming, polymer material; and an interparticle cross-linking agent reacted with the polymer material of the precursor particles to form crosslink bonds between the precursor particles. Because of the particulate nature of the precursor particles, the macrostructure (52) has pores between adjacent precursor particles. The pores are interconnected by intercommunicating channels such that the macrostructure is liquid permeable.

Des macrostructures polymères absorbantes (52) et poreuses comprennent un agrégat réticulé interparticulaire ayant un volume à sec circonscrit de plus de 10,0 mm3. L'agrégat réticulé interparticulaire comprend une multiplicité de particules précurseurs d'un matériau polymère absorbant pratiquement insoluble dans l'eau et formant un hydrogel; et un agent de réticulation interparticulaire qui est amené à réagir avec le matériau polymère des particules précurseurs pour former des liaisons réticulées entre lesdites particules. En raison de la nature particulaire des particules précurseurs, la macrostructure (52) comporte des pores entre des particules précurseurs contiguës. Les pores sont reliés entre eux par des canaux qui communiquent entre eux de manière à ce que la macrostructure soit perméable aux liquides.

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