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US 2020/0102453 A1Published application
Conductive thermoplastic polycarbonate/acrylonitrile butadiene styrene (pc/abs) polymer with nanomaterials and articles and methods thereof
AssigneeLockheed Martin Corporation
InventorsJames A. Waicukauski, Venugopala Rao Basava, Joseph Herbert Mills, Rikard K. Haraldsson, James Alan Gubisch
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Abstract
An electrically conductive thermoplastic composition comprised of at least one thermoplastic polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) polymer, at least one electrically conductive material containing carbon nanostructures or nanomaterials, and optionally at least one ethylene/alkyl-(meth)acrylate copolymer. The conductive thermoplastic composition can be injection molded and/or printable using additive manufacturing techniques.
Claims19
1:
- A composition comprising an electrically conductive polymer composite, the composite comprising, based on the entire composition:
- 50 to 98 wt. % of at least one thermoplastic material comprising thermoplastic polycarbonate/acrylonitrile-butadiene-styrene polymer;
- 1 to 20 wt. % of at least one electrically conductive material comprising carbon nanostructures;
- and
- 1 to 20 wt. % of at least one ethylene/alkyl-(meth)acrylate copolymer.
2 more elements
2:
- The composition according to claim 1, wherein the carbon nanostructures are carbon nanotubes.
3:
- The composition according to claim 1, wherein the at least one ethylene/alkyl-(meth)acrylate copolymer is ethylene methyl acrylate.
4:
- The composition according to claim 1,
- wherein the carbon nanostructures are carbon nanotubes, and
- wherein the at least one ethylene/alkyl-(meth)acrylate copolymer is ethylene methyl acrylate.
(canceled)
6:
- The composition according to claim 4, comprising, based on the entire composition:
- 70 to 94 wt. % of the at least one thermoplastic material comprising thermoplastic polycarbonate/acrylonitrile-butadiene-styrene polymer;
- 2 to 15 wt. % of the carbon nanotubes;
- and
- 2 to 15 wt. % of the ethylene methyl acrylate.
2 more elements
7:
- The composition according to claim 4, consisting of, based the entire composition:
- 90 wt. % of the at least one thermoplastic material comprising thermoplastic polycarbonate/acrylonitrile-butadiene-styrene polymer;
- 5 wt. % of the carbon nanotubes;
- and
- 5 wt. % of the ethylene methyl acrylate.
2 more elements
8:
- A method of preparing a composition according to claim 1, the method comprising:
- (a) combining the at least one thermoplastic material comprising thermoplastic polyurethane, the at least one electrically conductive material comprising carbon nanostructures, and the at least one ethylene/alkyl-(meth)acrylate copolymer in a liquid dispersing medium to form at least one mixture;
- (b) subjecting the mixture to sufficient agitation to provide a substantially uniform dispersion;
- and
- (c) substantially removing the liquid dispersing medium from the dispersion of the subjecting (b) to form the electrically conductive polymer composite, where the at least one thermoplastic material, the at least one electrically conductive material comprising carbon nanostructures, and the at least one ethylene/alkyl-(meth)acrylate copolymer are distributed substantially uniformly in the electrically conductive polymer composite.
2 more elements
9:
- The method according to claim 8, wherein the carbon nanostructures are carbon nanotubes.
10:
- The method according to claim 8, wherein the at least one ethylene/alkyl-(meth)acrylate copolymer is ethylene methyl acrylate.
11:
- The method according to claim 8, wherein the composition comprises:
- the at least one thermoplastic material comprising thermoplastic polycarbonate/acrylonitrile-butadiene-styrene polymer;
- at least one carbon nanotube as the carbon nanostructures;
- and
- ethylene methyl acrylate as the at least one ethylene/alkyl-(meth)acrylate copolymer.
2 more elements
12:
- The method according to claim 11, wherein the composition comprises, based on the entire composition:
- 70 to 94 wt. % of the at least one thermoplastic material comprising thermoplastic polycarbonate/acrylonitrile-butadiene-styrene polymer;
- 2 to 15 wt. % of the at least one carbon nanotube;
- and
- 2 to 15 wt. % of the ethylene methyl acrylate.
2 more elements
13:
- The method according to claim 11, wherein the composition consists of, based on the entire composition:
- 90 wt. % of the at least one thermoplastic material comprising thermoplastic polycarbonate/acrylonitrile-butadiene-styrene polymer;
- 5 wt. % of the at least one carbon nanotube;
- and
- 5 wt. % of the ethylene methyl acrylate.
2 more elements
14:
- The method according to claim 8, further comprising forming an article of manufacture from the composition.
15:
- The method according to claim 8, wherein the composition has a melt flow rate compatible with fused filament fabrication (FFF).
16:
- A method of forming a three-dimensional article of manufacture from a composition according to claim 1, the method comprising:
- providing the electrically conductive polymer composite;
- and
- forming the three-dimensional article of manufacture out of the provided electrically conductive polymer composite.
1 more element
17:
- The method according to claim 16, wherein said forming the three-dimensional article of manufacture is via fused filament fabrication (FFF) additive manufacturing.
18:
- The method according to claim 16, wherein said forming the three-dimensional article of manufacture is via injection molding.
19:
- The method according to claim 16, wherein the article of manufacture is an electromagnetic interference (EMI) enclosure.
Dependencies are inferred from the claim text.