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US 6,228,923 B1Granted
Water soluble rapid prototyping support and mold material
AssigneeStratasys, Inc.
InventorsJohn Lang Lombardi, Dragan Popovich, Gregory John Artz
Life of this patent
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Abstract
Formation of polymeric prototype elements is effected by high pressure and high temperature extrusion of selected materials onto a plate as a ribbon of liquefied polymer comprising poly(2-ethyl-2-oxazoline) and a polar polymer is discharged in a programmed pattern.
Claims5
In a freeform fabrication process for forming a three-dimensional solid object incorporating the step of depositing a thermoplastic composition as a ribbon of liguified material layer by layer in a predetermined pattern onto a substrate, the improvement comprising:
- providing as the thermoplastic composition a water-soluble thermoplastic comprising poly(2ethyl-2-oxazoline) and a polar polymer selected from the group consisting of compounds having nitrile functional groups, compounds having ether and hydroxyl functional groups, and mixtures thereof.
Dependencies are inferred from the claim text.