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US 10,864,673 B2Granted
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.
Claims34
A reactive additive manufacturing composition, comprising:
- a first component comprising a polyisocyanate and having a first viscosity;
- and
- a second component comprising a polyamine and having a second viscosity,
- wherein the reactive additive manufacturing composition is characterized by a tack free time of greater than 3 minutes, and
- wherein the first viscosity is within ±20% of the second viscosity;
- wherein the 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.
3 more elements
A method of reactive additive manufacturing using a reactive additive manufacturing composition, wherein,
- the reactive additive manufacturing composition comprises:
- a first component comprising a polyisocyanate and having a first viscosity;
- and
- a second component comprising a polyamine and having a second viscosity,
- wherein the reactive additive manufacturing composition is characterized by a tack free time of greater than 3 minutes;
- and
- the method comprises:
- providing the first component into a first pump;
- providing the second component 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 additive manufacturing composition;
- and
- depositing the reactive additive manufacturing composition through a nozzle connected to the mixer.
9 more elements
A reactive additive manufacturing composition, comprising:
- a first component comprising a polyisocyanate and having a first viscosity;
- and
- a second component comprising a polyamine and having a second viscosity,
- wherein the reactive additive manufacturing composition is characterized by a tack free time of greater than 3 minutes, and
- wherein the reactive additive manufacturing composition comprises a polymeric rheology modifier.
2 more elements
An object formed from a reactive additive manufacturing composition, wherein the reactive additive manufacturing composition comprises:
- a first component comprising a polyisocyanate and having a first viscosity;
- and
- a second component comprising a polyamine and having a second viscosity,
- wherein the reactive additive manufacturing composition is characterized by a tack free time of greater than 3 minutes, and
- wherein the object comprises a plurality of layers, wherein adjacent layers forming the object are covalently bonded.
2 more elements
Dependencies are inferred from the claim text.