Embodiments of an aqueous-based dispersion of a hydrolytically unstable polymer comprise particles of said hydrolytically unstable polymer and a stabilizing agent in water. The dispersion is substantially free of volatile organic solvents.

A multi-layer bioactive and biodegradable film. The multi-layer film includes one or more bioactive compounds or microorganisms for promoting growth and health of a plant, the bioactive compounds or microorganisms contained between layers of the film, wherein each one of the layers comprises about 60% to about 75% (m/m) polyhydroxyalkanoate. The bioactive compounds or microorganisms may include any one of or a combination of: a metabolite, an anti-microbial compound, an enzyme, a live microorganism, a fertilizer, a plant growth hormone, a preservative, a pesticide or an herbicide. Release of one or more bioactive compounds may be achieved in a timed and controlled manner.

The invention refers to a Process for preparing a bio-resorbable polyester the form of a powder with a bulk density of 0.3 g/ml or more, a tapped density of 0.4 g/ml or more and a specific surface area of 2.0 m.sup.2/g or less comprising the steps a. dissolving a bio-resorbable polyester in a first solvent to form a polymer solution, b. contacting the polymer solution with a second solvent which is a non-solvent for the bioresorbable polyester and which is mainly water to result the precipitation of the bio-resorbable polyester in the form of a wet polymer mass, c. pre-drying the wet polymer mass at a temperature below the T.sub.gO of the bio-resorbable polyester, d. comminuting the pre-dried polymer mass to polymer particles with a size below 10 mm, e. drying the comminuted polymer particles below the T.sub.gO of the bio-resorbable polyester to a residual water content of 1% or less by weight/weight, f. post-treatment of the polymer particles from step e at a temperature in the range from the T.sub.gO to the T.sub.gE of the bio-resorbable polyester, g. comminuting the polymer particles from step f to a powder with a particle size of d.sub.50 of 1-300 μm and d.sub.90 of more than 30 and up to 3000 μm.

Composition and method for making a multi-layer bio-based film having one or more cavitated layers. In one aspect, the multilayer flexible film has polylactic acid, an inorganic filler, and a cavitation stabilizer making up at least one film layer. In one aspect, the barrier web has a cavitated bio-based film layer. In another aspect, the print web has a cavitated bio-based film layer.

Provided is a biodegradable resin molded product that exhibits excellent processability and sufficient strength as the molded product, is advantageous in terms of cost and at the same time, has excellent biodegradability under an environment, in particular, marine biodegradability, and a method for producing the same, and pellets used therefor. The molded product is produced using a biodegradable resin composition including a biodegradable resin and heavy calcium carbonate particles in a range by mass of 50:50 to 10:90.

Novel absorbable polymer blends are disclosed. The blends are useful for manufacturing medical devices having engineered degradation and breaking strength retention in vivo. The blends consist of a first absorbable polymeric component and a second absorbable polymeric component. The weight average molecular weight of the first polymeric component is higher than the weight average molecular weight of the second polymeric component. At least at least one of said components is at least partially end-capped by a carboxylic acid group. Further aspects are medical devices made therefrom.

A triple shape memory polymeric foam that is open cell in nature and features a two phase, crosslinked SMP with a glass transition temperature of one phase at a temperature lower than a melting transition of the second phase. The resulting soft material features high fidelity, repeatable triple shape behavior, and is useful for complex deployment using a combination of foam compression and bending.

The purpose of the present invention is to provide a PHA, in particular PHBV, having a molecular weight exceeding 3,610,000 and/or a method for producing such a PHA while controlling the molecular weight thereof. Provided is a copolymer of random copolymerization of 3-hydroxybutanoic acid and 3-hydroxyvaleric acid, having a weight-average molecular weight exceeding 3,610,000.

Degradable extruded nettings include a plurality of interconnected strands, at least some of the strands being made from a polymeric blend, the polymeric blend including polylactic acid polymer composition, polybutyrate adipate terephthalate polymer composition, polylactic acid-polybutyrate compatibilizer, and a degradation additive, the degradation additive including a degrader in a carrier resin.

Disclosed herein are methods for manufacturing a functionally graded polymer material. The methods comprise preparing a melted polymer mixture comprising a thermoplastic polymer and a magnetic filler dispersed in the thermoplastic polymer, molding the melted polymer mixture and applying a magnetic field to a portion of the melted polymer mixture to form a functionally graded polymer material. The resulting functionally graded polymer material has a magnetic filler gradient formed through a thickness of the material.