Patent ID: 8623247
Filing Date: 2014-01-07
Classification: A61K,A61P,A61Q,D01F,D04H,Y10T

Abstract:
1. A process for producing at least one multicomponent fiber having a shaped cross section comprising spinning at least one water dispersible sulfopolyester having a glass transition temperature (Tg) of at least 57° C. and at least one water-nondispersable polymer immiscible with said sulfopolyester into said multicomponent fiber, said sulfopolyester comprising: (i) residues of one or more dicarboxylic acids; (ii) about 4 to about 40 mole %, based on the total repeating units, of residues of at least one sulfomonomer having 2 functional groups and one or more sulfonate groups attached to an aromatic or cycloaliphatic ring wherein said functional groups are hydroxyl, carboxyl, or a combination thereof; (iii) one or more diol residues wherein at least 25 mole %, based on the total diol residues, is a poly(ethylene glycol) having a structure (iv) 0 to about 25 mole %, based on the total repeating units, of residues of a branching monomer having 3 or more functional groups wherein said functional groups are hydroxyl, carboxyl, or a combination thereof; wherein said multicomponent fiber has a plurality of segments comprising said water-nondispersable polymer and said segments are substantially isolated from each other by said sulfopolyester intervening between said segments.