Methods for Reactive Three-Dimensional Printing by Extrusion

Patent metadata

Field	Value
Publication number	US-2021277263-A1
Application number	US-202117201731-A
Country	US
Kind code	A1
Filing date	Mar 15, 2021
Priority date	Nov 24, 2014
Publication date	Sep 9, 2021
Grant date	—

Abstract

Methods of printing a three-dimensional object using co-reactive components are disclosed. Thermosetting compositions for three-dimensional printing are also enclosed.

First claim

1 .- 26 . (canceled)

27 . A method of three-dimensional printing an object comprising:
(a) extruding a coreactive composition, wherein,
the coreactive composition comprises a first component comprising at least two first functional groups and a second component comprising at least two second functional groups,
the second functional group is reactive with the first functional group; and
at least one of the first functional group and the second functional group comprises a saturated functional group; and
(b) building a three-dimensional printed object; wherein extruding comprises forming an extrusion wherein the extrusion is characterized by a cross-sectional profile having an inhomogeneous material composition.

28 . The method of claim 27 , wherein,
the cross-sectional profile comprises a first proton and a second portion; the first portion comprises a molar ratio of the first component to the second component greater than 1; and the second portion comprises a molar ratio of the first component to the second component less than 1.

29 . The method of claim 28 , wherein the first portion and the second portion are on opposite sides of the cross-sectional profile.

30 . The method of claim 28 , wherein,
the first portion comprises an equivalent ratio of the first functional group to the second functional group greater than 1; and the second portion comprises an equivalent ratio of the first functional group to the second functional group less than 1.

31 . The method of claim 27 , wherein an equivalents ratio of the first component to the second component is not homogeneous throughout the cross-sectional profile.

32 . The method of claim 27 , wherein an equivalents ratio of the first component to the second component is homogeneous throughout the cross-sectional profile.

33 . The method of claim 27 , wherein a surface of the extrudate has an excess of the first functional groups with respect to the second functional groups.

34 . The method of claim 27 , wherein the cross-sectional profile is characterized by a variable ratio of the first coreactive component and the second coreactive component.

35 . The method of claim 27 , wherein,
the first functional group is a carboxylic acid; and the second functional group is an epoxy; or the first functional group is an activated unsaturated group selected from a (meth)acrylate, a maleic acid, a fumaric acid, a Michael acceptor, a vinyl ether, an acetoacetate, an acyclic carbonate, and a malonate; and the second functional group is selected from a primary amine, a secondary amine, and a malonate; or the first functional group is an isocyanate; and the second functional group is a hydroxyl; or the first functional group is an isocyanate; and the second functional group is selected from a primary amine and a secondary amine; or the first functional group is selected from a cyclic carbonate, an acetoacetate, and an epoxy; and the second functional group is selected from a primary amine and a secondary amine; or the first functional group is a thiol; and the second functional group is selected from an alkenyl, a vinyl ether, a Michael acceptor group and a (meth)acrylate; or at least one of the first functional group and the second functional group comprises a saturated functional group.

36 . The method of claim 27 , wherein the first component comprises a polyisocyanate and the second component comprises a polyamine.

37 . The method of claim 27 , wherein the first component comprises a polythiol; and the second component comprises a polyalkenyl.

38 . The method of claim 27 , wherein the first component comprises a polyfunctional Michael acceptor and the second component comprises a polyfunctional Michael donor.

39 . The method of claim 27 , wherein extruding comprises extruding the coreactive composition through a single nozzle.

40 . The method of claim 27 , wherein the coreactive composition is a thermosetting composition.

41 . The method of claim 27 , wherein the coreactive composition is reactive at a temperature less than 30° C.

Assignees

• Ppg Ind Ohio Inc
• Ut Battelle Llc

Inventors

• Fenn David R
• Olson Kurt G
• Rock Reza M
• Kutchko Cynthia
• Donaldson Susan F
• Sun Hao
• Rios Orlando
• Carter William G

Classifications

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• B29C64/10 Primary

  Processes of additive manufacturing · CPC title

• C08G2150/50

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

• C08G18/73

  acyclic · CPC title

• C08G18/3821

  Carboxylic acids; Esters thereof with monohydroxyl compounds · CPC title