Improved thermoplastic hydrophilic polymeric compositions...

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/435 (2006.01) B32B 27/12 (2006.01) C08K 5/103 (2006.01) C08K 5/11 (2006.01) D06N 3/12 (2006.01)

Patent

CA 2422739

The present invention relates to thermoplastic hydrophilic polymeric compositions for making a liquid impermeable moisture vapour permeable structure, for example by forming the composition into a layer or film. The thermoplastic compositions comprise selected thermoplastic polymers and selected compatible plasticiser that provide the thermoplastic hydrophilic composition with a desired tackiness level, without impairing the moisture vapour permeability of films or layers made from the thermoplastic hydrophilic polymeric compositions. The layers made from the thermoplastic hydrophilic polymeric compositions of the present invention can find a variety of applications wherein liquid imperviousness and moisture vapour permeability are desirable.

L'invention concerne des compositions thermoplastiques hydrophiles polymères servant à élaborer une structure imperméable aux liquides et perméable à la vapeur d'eau, par exemple, par obtention d'une couche ou d'une pellicule à partir de cette composition. Ces compositions thermoplastiques contiennent des polymères thermoplastiques sélectionnés et un plastifiant compatible sélectionné conférant à ladite composition thermoplastique hydrophile un niveau souhaité d'adhérence, sans limiter la perméabilité à la vapeur d'eau de ces pellicules ou de ces couches fabriquées à partir de ces compositions. On peut utiliser ces couches dans une variété de domaines nécessitant une imperméabilité aux liquides et une perméabilité à la vapeur d'eau.

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