Additive manufacturing using polyurea materials

Patent metadata

Field	Value
Publication number	US-12138850-B2
Application number	US-202017093886-A
Country	US
Kind code	B2
Filing date	Nov 10, 2020
Priority date	Aug 18, 2017
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

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 reactive additive manufacturing composition, comprising: a first compound having a first functional group;
a second compound having a second functional group, wherein the second functional group is reactive with the first functional group; and
a third compound having a third functional group, wherein the third functional group is reactive with the first functional group or the second functional group;
wherein the reactive additive manufacturing composition is characterized by a tack free time of greater than 3 minutes.

2. The composition of claim 1 , wherein the reaction rate between the third compound with the first compound or with the second compound is faster than the reaction rate between the first compound and the second compound.

3. The composition of claim 1 , wherein the composition is a thermosetting composition.

4. The composition of claim 1 , wherein the composition comprises a polymeric rheology modifier.

5. The composition of claim 4 , wherein the polymeric rheology modifier comprises polyethylene or a propylene/ethylene copolymer.

6. The composition of claim 4 , wherein the polymeric rheology modifier comprises a reactive polymeric rheology modifier.

7. The composition of claim 1 , wherein each of the first compound, the second compound, and the third compound independently comprises a prepolymer, a monomer, or a combination thereof.

8. The composition of claim 7 , wherein,
each monomer independently has a molecular weight less than 600 Daltons;
and each prepolymer independently has a molecular weight from 1,000 Daltons to 20,000 Daltons.

9. The composition of claim 1 , wherein the first compound comprises an polyisocyanate and the second compound comprises a polyamine or a polyol.

10. The composition of claim 1 , wherein the first compound comprises a thiol and the second compound comprises a polyalkenyl, a polyisocyanate, a polythiol, a polyfunctional Michael acceptor, or a polyfunctional vinyl ether.

11. The composition of claim 1 , wherein the first compound comprises a saturated functional group and the second compound comprises an unsaturated functional group.

12. The composition of claim 11 , wherein the first compound comprises more than one type of saturated functional group.

13. The composition of claim 11 , wherein the second compound comprises more than one type of unsaturated functional group.

14. The composition of claim 1 , wherein the reactive additive manufacturing composition comprises from 0.1 wt % to 40 wt % of a filler, wherein wt % is based on the total weight of the reactive additive manufacturing composition.

15. The composition of claim 14 , wherein the filler comprises an inorganic filler, an organic filler, a low-density filler, an electrically conductive filler, magnetic filler, or a combination of any of the foregoing.

16. An object formed using the composition of claim 1 .

17. The object of claim 16 , wherein a ratio of the coreactive compounds in one portion of the object is different than a ratio of the coreactive compounds in a second portion of the object.

18. The object of claim 17 , wherein the ratio comprises a weight percent ratio or an equivalents ratio.

19. The object of claim 16 , wherein the some portions of the object are rigid and other portions are flexible.

20. The object of claim 16 , wherein different portions of the object have different properties, the properties comprising at least one of a chemical property, a physical property, a thermal property, or a material property.

Assignees

• Ppg Ind Ohio Inc

Inventors

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

Classifications

• C09D175/02

  Polyureas · CPC title

• C08G2150/50

  Compositions for coatings applied by spraying at least two streams of reaction components · CPC title

• C08G18/792

  formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates · 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

• C08G18/5024

  containing primary and/or secondary amino groups · CPC title