Removal of solvent from gels of poly(hydroxybutyrate) and shaped articles formed therefrom
AssigneeImperial Chemical Industries PLC
InventorsPeter J. Barham, Alan Selwood
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Abstract
A process of forming shaped articles comprising forming a free draining gel from a solution of poly(hydroxybutyrate) in a poor solvent under conditions which cause crystallization of the polymer and subjecting the gel to a non-random deformation process so that the associated solvent is expressed. Some residual solvent may be present and can assist in subsequent fabrication processes but the solvent may also be completely removed for such processes. The resulting products have good physical properties, after uniaxial or biaxial drawing.
Claims7
A process comprising forming a gel from a solution of poly(hydroxybutyrate) in a poor solvent and subjecting the gel to a non-random deformation process.
Dependencies are inferred from the claim text.