Compositions for the production of objects using additive manufacturing

Abstract

Objects can be produced using an additive manufacturing process and the objects can be removed from the substrates on which the objects are formed. An object can include a plurality of layers of a polymeric material that includes units of a diacid component and units of a glycol component. A process can be used to form the object that includes depositing a plurality of layers of the polymeric material onto a substrate to form the object. In some cases, the plurality of layers are deposited onto the substrate according to a predetermined design.

1 . An article comprising:
 a plurality of layers of a polymeric material that includes units of a diacid component and units of a glycol component, wherein the units of the diacid component are derived from a first diacid and a second diacid.   
     
     
         2 . The article of  claim 1 , wherein the plurality of layers are arranged according to a design. 
     
     
         3 . The article of  claim 1 , wherein the first diacid is terephthalic acid and the second diacid is isophthalic acid, a cyclohexanedicarboxylic acid, a naphthalenedicarboxylic acid, a stilbenedicarboxylic acid, or a combination thereof. 
     
     
         4 . The article of  claim 1 , wherein the diacid component includes from about 40 mole % to about 60 mole % of units derived from the first diacid and from about 40 mole % to about 60 mole % of units derived from the second diacid. 
     
     
         5 . The article of  claim 1 , wherein the diacid component includes from about 45 mole % to about 55 mole % of units derived from terephthalic acid and from about 45 mole % to about 55 mole % of units derived from isophthalic acid. 
     
     
         6 . The article of  claim 1 , wherein the units of the glycol component are derived from cyclohexanedimethanol. 
     
     
         7 . The article of  claim 1 , wherein the glycol component includes from about 75 mole % to about 98 mole % of units derived from a first glycol and from about 2 mole % to about 25 mole % of units derived from one or more second glycols. 
     
     
         8 . The article of  claim 7 , wherein the first glycol includes cyclohexanedimethanol and the one or more second glycols include ethylene glycol, a propanediol, neopentyl glycol, a butanediol, a pentanediol, a hexanediol, p-xylene glycol, or a combination thereof. 
     
     
         9 . The article of any one of  claims 1 - 8 , wherein the polymeric material has an inherent viscosity from about 0.55 dL/g to about 0.7 dL/g, a density no greater than about 1.25 g/cm 3 , a glass transition temperature of at least about 80° C., and a crystallization half-time no greater than about 300 minutes. 
     
     
         10 . An article comprising:
 a body comprised of a polymeric material that includes units of a diacid component and units of a glycol component, wherein:
 the body has a diameter from about 1 mm to about 5 mm and a length of at least about 3 cm; and 
 an inherent viscosity loss of an object formed from the polymeric material relative to the polymeric material before forming the object is no greater than about 0.9%. 
   
     
     
         11 . The article of  claim 10 , wherein the polymeric material has a zero shear viscosity no greater than about 3000 Poise. 
     
     
         12 . The article of  claim 10 , wherein the polymeric material has an elongation at break of at least about 75%. 
     
     
         13 . The article of  claim 10 , wherein the polymeric material has a density no greater than about 1.25 g/cm 3 . 
     
     
         14 . The article of  claim 10 , wherein the polymeric material has a glass transition temperature of at least about 80° C. 
     
     
         15 . The article of  claim 10 , wherein the body has a length of at least about 30 cm. 
     
     
         16 . The article of  claim 10 , wherein the body has a diameter from about 1.5 mm to about 3 mm and a length of at least about 2 m. 
     
     
         17 . The article of any one of  claims 10 - 16 , wherein the units of the glycol component are derived from cyclohexanedimethanol, from about 40 mole % to about 60 mole % of the units of the diacid component are derived from terephthalic acid, and from about 40 mole % to about 60 mole % of the units of the diacid component are derived from isophthalic acid.