Polyhydroxyalkanoate molding compositions
AssigneeMetabolix, Inc.
InventorsEdward Muller, Daniel Horowitz, Anna Egozy
Life of this patent
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Abstract
Molding compositions including polyhydroxyalkanoates are provided. The use of polyhydroxyalkanoates as a binder in molding compositions provides improved binder removal in the finished molded product, and offers a wide range of physical properties suitable for use in a variety of processing conditions. The composition preferably includes a powdered material, such as a metal powder, ceramic powder, or blend, admixed with a polyhydroxyalkanoate binder. The compositions are useful in powder processing techniques, such as injection molding, slip casting, tape casting, or extrusion.
Claims17
A composition comprising at least one powdered material admixed with at least one thermally decomposable copolymer of two or more hydroxyalkanoates wherein the powdered material is present in an amount between about 50% and 99.999% by weight based on total dry weight of the composition.
A method of a forming shaped product, the method comprising
- molding a composition comprising a powdered material admixed with at least one thermally decomposable polyhydroxyalkanoate or a solution thereof to form the shaped product, and
- removing essentially all of the polyhydroxyalkanoate from the shaped product.
A molded article formed by a method comprising
- molding a composition comprising a powdered material admixed with at least one
- thermally decomposable polyhydroxyalkanoate or a solution thereof, and
- removing essentially all of the polyhydroxyalkanoate from the shaped product.
A composition comprising at least one powdered material admixed with at least one thermally decomposable polyhydroxyalkanoate wherein the powdered material is present in an amount greater than 75% by weight based on total dry weight of the composition.
Dependencies are inferred from the claim text.