Additive manufacturing using polyurea materials
AssigneePPG Industries Ohio, Inc.
InventorsDavid Robert Fenn, Kurt G. Olson, Reza M. Rock, Cynthia Kutchko, Susan Donaldson, Anthony J. Fogl
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Abstract
Methods of additive manufacture using coreactive components are disclosed. Thermosetting compositions for additive manufacturing are also disclosed.
Claims33
A method of reactive additive manufacturing, comprising:
- providing a first component comprising a first prepolymer into a first pump;
- providing a second component comprising a second prepolymer into a second pump, wherein the second prepolymer is reactive with the first prepolymer;
- pumping the first component from the first pump, and the second component from the second pump through a mixer to provide a reactive composition;
- and
- depositing the reactive composition through a nozzle connected to the mixer.
A reactive additive manufacturing composition, comprising:
- a first component comprising a polyisocyanate prepolymer and a first viscosity;
- and
- a second component comprising a polyamine prepolymer and a second viscosity,
- wherein the first viscosity is within ±20% of the second viscosity,
- wherein viscosity is measured using an Anton Paar MCR 301 or 302 rheometer with a 25 mm-diameter parallel plate spindle, an oscillation frequency of 1 Hz and amplitude of 0.3%, and with a rheometer plate temperature of 25° C.
The composition of aspect 18, wherein, the polyisocyanate prepolymer comprises an isophorone diisocyanate-terminated polyetheramine prepolymer, such as an isophorone diisocyanate-terminated polyoxypropylenediamine prepolymer;
- and the polyamine prepolymer comprises a polyetheramine prepolymer.
The composition of aspect 18, wherein, the polyisocyanate prepolymer comprises an isophorone diisocyanate-terminated polyoxypropylenediamine prepolymer;
- and the polyamine prepolymer comprises a polyetheramine prepolymer.
Dependencies are inferred from the claim text.