Patent ID: 6500897
Filing Date: 2002-12-31
Classification: C08F,C08G,C08J,C08L,D01F

Abstract:
A water-responsive homogeneous polymer blend composition comprising:poly(&bgr;-hydroxybutyrate), or poly(&bgr;-hydroxybutyrate-co-&bgr;-hydroxyvalerate) grafted with a polar monomer, oligomer, or polymer or a combination thereof selected from poly(ethylene glycol) acrylates, poly(ethylene glycol) alkyl ether acrylates, poly(ethylene glycol) methacrylates, poly(ethylene glycol) alkyl ether methacrylates, acrylic acid, maleic anhydride, itaconic acid, sodium acrylate, 3-hydroxypropyl methacrylate, 2-hydroxyethyl methacrylate, 3-hydroxypropyl acrylate, 2-hydroxyethyl acrylate, acrylamide, glycidyl methacrylate, 2-cyanoethyl acrylate, glycidyl acrylate, 4-nitrophenyl acrylate, pentabromophenyl acrylate, poly(propylene glycol) methacrylates, poly(propylene glycol) acrylates, 2-propene-1-sulfonic acid and its sodium salt, 2-sulfoethyl acrylate, 2-sulfoethyl methacrylate, 3-sulfopropyl acrylate, 3-sulfopropyl methacrylate or mixtures thereof, and a water-soluble polymer comprising polyvinyl alcohol.