Compositions for the production of objects using additive manufacturing

Patent metadata

Field	Value
Publication number	US-2017145155-A1
Application number	US-201615345949-A
Country	US
Kind code	A1
Filing date	Nov 8, 2016
Priority date	Nov 19, 2015
Publication date	May 25, 2017
Grant date	—

Abstract

Objects can be produced using an additive manufacturing process. The objects can include a plurality of layers of a polymeric material that includes a copolyester ether. The copolyester ether can include units of a diacid component and units of a glycol component. In some implementations, the units of the diacid component can be derived from at least one aliphatic dicarboxylic acid. Further, in some illustrative examples, the units of the glycol component can be derived from an aliphatic glycol and a polyalkylene ether glycol. In some cases, the polymeric material can also include a thermoplastic elastomer and a resin component.

First claim

1 . An article comprising:
a plurality of layers including a polymeric material, the polymeric material including a copolyester ether having units of a diacid component and units of a glycol component, wherein:
the units of the diacid component are derived from at least one aliphatic dicarboxylic acid including 1,4-cyclohexanedicarboxylic acid; and
the units of the glycol component are derived from 1,4-cyclohexanedimethanol and a polyalkylene ether glycol.

2 . The article of claim 1 , wherein the polymeric material includes a thermoplastic elastomer and a resin component.

3 . The article of any one of claims 1 - 2 , wherein the thermoplastic elastomer includes a styrene block copolymer and the resin component includes a hydrocarbon-based resin.

4 . The article of any one of claims 1 - 2 , wherein the copolyester ether comprises from about 50% by weight to about 99% by weight of the polymeric material, the thermoplastic elastomer comprises from about 1% by weight to about 50% by weight of the polymeric material, and the resin component comprises from 0% by weight to about 10% by weight of the polymeric material.

5 . The article of claim 1 , wherein the plurality of layers are arranged according to a predetermined design.

6 . The article of any one of claims 1 - 2 , wherein the polyalkylene ether glycol includes polytetramethylene ether glycol.

7 . The article of claim 1 , wherein the plurality of layers can include a silica-containing material.

8 . An article comprising:
a plurality of layers of a polymeric material including a copolyester ether having units of a diacid component and units of a glycol component, wherein:
the units of the glycol component are derived from a first glycol and a second glycol; and
the polymeric material has an inherent viscosity from about 0.8 dL/g to about 1.5 dL/g.

9 . The article of claim 8 , wherein the diacid component includes at least about 60 mole % of a trans isomer of 1,4-cyclohexanedicarboxylic acid.

10 . The article of claim 8 , wherein the glycol component includes at least about 60 mole % of a trans isomer of 1,4-cyclohexanedimethanol.

11 . The article of claim 8 , wherein from about 5 mole % to about 35 mole % of the units of the glycol component are derived from polytetramethylene ether glycol and from about 65 mole % to about 95 mole % of the units of the glycol component are derived from 1,4-cyclohexanedimethanol.

12 . The article of any one of claim 8 , or 10 - 11 , wherein a portion of the units of the glycol component are derived from polytetramethylene ether glycol having a molecular weight from about 500 to about 1500.

13 . The article of claim 8 , wherein:
the polymeric material includes a branching agent, the branching agent comprising a polyprotic acid having at least three carboxyl groups and from 3 to 60 carbon atoms; and the diacid component includes from about 0.1 mole % to about 1.5 mole % of the branching agent.

14 . The article of claim 8 , wherein:
the polymeric material includes a branching agent, the branching agent comprising a polyol having at least three hydroxyl groups and from 3 to 60 carbon atoms; and the glycol component includes from about 0.1 mole % to about 1.5 mole % of the branching agent.

15 . The article of claim 8 , wherein a layer of the plurality of layers has a thickness from about 0.02 mm to about 0.75 mm.

16 . The article of claim 8 , wherein the polymeric material has a Young's Modulus of at least about 125 MPa and the polymeric material when tested according to the ASTM D638 standard has an elongation at break from about 1% to about 45%.

17 . The article of claim 8 , wherein the polymeric material has a Young's Modulus from about 100 MPa to about 160 MPa and an elongation at break from about 170% to about 300% when tested according to the ASTM D638 standard.

18 . The article of claim 8 , wherein the polymeric material has a tensile stress at break from about 5 MPa to about 15 MPa.

Assignees

• Eastman Chem Co

Inventors

• Wright Steven Frederick
• Franjione John Guy
• Detwiler Andrew Thomas
• Heise William Herbert
• Shang Ping Peter

Classifications

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• B33Y70/10

  Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials · CPC title

• B32B27/36

  comprising polyesters · CPC title

• B32B2307/54

  Yield strength; Tensile strength · CPC title

• B32B27/06

  as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} · CPC title