Additive manufacturing using reactive compositions

Patent metadata

Field	Value
Publication number	US-2020361136-A1
Application number	US-201816639877-A
Country	US
Kind code	A1
Filing date	Aug 17, 2018
Priority date	Aug 18, 2017
Publication date	Nov 19, 2020
Grant date	—

Abstract

Methods of additive manufacture using coreactive components are disclosed. Thermosetting compositions for additive manufacturing are also disclosed.

First claim

What is claimed is:

1 . A method of reactive additive manufacturing, comprising:
providing a first component comprising a first compound into a first pump; providing a second component comprising a second compound into a second pump, wherein the first compound is reactive with the second compound; pumping the first component from the first pump, and pumping the second component from the second pump through a mixer to provide a coreactive composition; and depositing the coreactive composition.

2 . The method of claim 1 , wherein each of the first pump and the second pump comprises a progressive cavity pump.

3 . The method of claim 1 , wherein,
the first component comprises two or more first compounds; and the second component comprises two or more second compounds.

4 . The method of claim 3 , wherein,
the two or more first compounds comprise an average functionality of a first functional group from 2 to 6; and the two or more second compounds comprise an average functionality of a second functional group from 2 to 6, wherein the first functional group is reactive with the second functional group.

5 . The method of claim 1 , wherein the first component, the second component, or both the first and second components independently comprise a viscosity from 200 centipoise to 20,000,000 centipoise, measured using an Anton Paar MCR 302 rheometer with a gap from 1 mm at 25° C. and a shear rate of 100 sect.

6 . The method of claim 1 , wherein,
the first component comprises a first viscosity; and the second component comprises a second viscosity, wherein the first viscosity is within ±50% of the second viscosity, wherein viscosity is measured using an measured using an Anton Paar MCR 302 rheometer with a 1 mm gap at a plate temperature of 25° C. and a shear rate of 100 sec −1 .

7 . The method of claim 1 , wherein,
the first compound comprises a first monomer, a first prepolymer, or a combination thereof; the second compound comprises a second monomer, a second prepolymer, or a combination thereof; and the first monomer and the first prepolymer is reactive with the second monomer and the second prepolymer.

8 . The method of claim 1 , wherein,
the first compound comprises at least one first prepolymer; the second compound comprises at least one second prepolymer; and the at least one first prepolymer is reactive with the at least one second prepolymer.

9 . The method of claim 1 , wherein the first compound comprises a polyamine and the second compound comprises a polyisocyanate.

10 . The method of claim 1 , wherein the first compound comprises a polyalkenyl compound and the second compound comprises a polythiol.

11 . The method of claim 1 , wherein the first compound comprises a Michael acceptor and the second compound comprises a Michael donor.

12 . The method of claim 1 , wherein the first compound comprises a polyepoxide and the second compound comprises a polythiol.

13 . The method of claim 1 , wherein the first compound comprises a polyepoxide and the second compound comprises a polyamine.

14 . The method of claim 1 , wherein the coreactive composition comprises a dynamic viscosity from 200 centipoise to 20,000,000 centipoise, wherein the dynamic viscosity is measured using an Anton Paar MCR 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.

15 . The method of claim 1 , wherein the coreactive composition is characterized by a gel time less than 5 minutes at 25° C.

16 . The method of claim 1 , wherein the first component, the second component, or both the first component and second component independently comprise a filler; and the coreactive composition comprises a filler.

17 . The method of claim 1 , wherein the first component, the second component, or both the first and second components independently comprise from 0.1 wt % to 95 wt % of a filler, wherein wt % is based on the total weight of the first component or the second component.

18 . The method of claim 1 , wherein the first component, the second component, or both the first and second components independently comprise from 0.1 vol % to 95 vol % of a filler, wherein vol % is based on the total weight of the first component or the second component.

19 . The method of claim 1 , wherein the coreactive composition comprises from 0.1 wt % to 95 wt % of a filler, wherein wt % is based on the total weight of the coreactive composition.

20 . The method of claim 1 , wherein the coreactive composition comprises from 0.1 vol % to 95 vol % of a filler, wherein vol % is based on the total weight of the coreactive composition.

21 . The method of claim 1 , wherein depositing comprises extrusion.

22 . An object formed using the method of claim 1 .

23 . The object of claim 22 , wherein the object provides an attenuation of at least 10 dB within a frequency range between 1 MHz to 18 GHz.

24 . The object of claim 22 , wherein the object is characterized by a specific gravity less than 0.9.

Assignees

• Ppg Ind Ohio Inc

Inventors

• Fenn David R
• Olson Kurt G
• Rock Reza M
• Kutchko Cynthia
• Donaldson Susan F
• Fogl Anthony J

Classifications

• C09J181/00

  Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon only; Adhesives based on polysulfones; Adhesives based on derivatives of such polymers · CPC title

• C08G59/50

  Amines · CPC title

• C08G59/66

  Mercaptans · CPC title

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title

• C08G18/755

  and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate · CPC title