Additive manufacturing using reactive compositions

Patent metadata

Field	Value
Publication number	US-2026008226-A1
Application number	US-202519272473-A
Country	US
Kind code	A1
Filing date	Jul 17, 2025
Priority date	Feb 18, 2020
Publication date	Jan 8, 2026
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 coreactive composition for reactive additive manufacturing, comprising:
a first component comprising a first compound; and a second component comprising a second compound, the second compound is reactive with the first compound; wherein the coreactive composition comprises an initial G″/G′ ratio of greater than 2, wherein a shear storage modulus (G′) and a shear loss modulus (G″) are measured using a rheometer with a gap from 1 mm to 2 mm, with a 25 mm diameter parallel plate spindle, an oscillation frequency of 1 Hz and amplitude of 0.3%, at a rheometer plate temperature of 25° C.

2 . The coreactive composition of claim 1 , wherein the coreactive composition and the second coreactive composition each have a tack free time of greater than 4 minutes.

3 . The coreactive composition of claim 1 , 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.

4 . The coreactive composition 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 sec·1.

5 . The coreactive composition 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 are reactive with the second monomer and the second prepolymer.

6 . The coreactive composition 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.

7 . The coreactive composition 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.

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

9 . The coreactive composition of claim 1 , wherein:
the first component has a first viscosity and the second component has a second viscosity; the first viscosity is within ±20% of the second viscosity; and viscosity is measured using an Anton Paar MCR 30 rheometer with a 1 mm gap at a plate temperature of 25° C. and a shear rate of 100 sec·1.

10 . The coreactive composition of claim 9 , further comprising a filler;
wherein the filler comprises at least one of an inorganic filler, an organic filler, a low-density filler, an electrically conductive filler, magnetic filler, or a combination of any of the foregoing.

11 . The coreactive composition of claim 10 , wherein the first component, the second component, or both the first and second components independently comprise from 0.1 vol % to 95 vol % of the filler, wherein vol % is based on the total weight of the first component or the second component.

12 . The coreactive composition of claim 10 , wherein the first component, the second component, or both the first and second components independently comprise from 0.1 wt. % to 15 wt. % of the filler configured to modify at least one of the first viscosity, the second viscosity, and a combination of the first viscosity and second viscosity, wherein wt. % is based on the total weight of the first component or the second component.

13 . The coreactive composition of claim 1 , wherein the first component and second component are reactive at a temperature of less than 50° C.

14 . The coreactive composition of claim 1 , further comprising a polymeric rheology modifier.

15 . The coreactive composition of claim 12 , wherein the polymeric rheology modifier comprises a reactive polymeric rheology modifier.

16 . The coreactive composition of claim 12 , wherein each of the first component and the second component independently comprises from 1 wt % to 20 wt % of the polymeric rheology modifier, wherein wt % is based on the total weight of the first component or the second component.

17 . An object formed using the coreactive composition of claim 1 .

18 . The object of claim 17 , wherein the object comprises a plurality of layers, wherein adjacent layers forming the object are covalently bonded.

19 . The object of claim 17 , wherein the object is characterized by a specific gravity less than 0.9.

20 . The object of claim 17 , wherein the object provides an attenuation of at least 10 dB within a frequency range between 1 MHz to 18 GHz.

Assignees

• Ppg Ind Ohio Inc

Inventors

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

Classifications

• C08L81/02

  Polythioethers; Polythioether-ethers · CPC title

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C08K3/36

  Silica · 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