3D printing heat resistant support material

An article of manufacture comprising:

• a support structure comprising an amorphous, thermoplastic resin further comprising Bisphenol Isophorone carbonate units and Bisphenol A carbonate units, wherein the Bisphenol Isophorone carbonate units, are 30 to 50 mole percent of the total of Bisphenol A carbonate units, and Bisphenol Isophorone carbonate units in the resin, and wherein the resin has a glass transition temperature from 165° C. to 200° C.;
• and
• a three dimensional model comprising a second thermoplastic resin wherein the second thermoplastic resin and the high heat resin are not the same;
• wherein at least a portion of a surface of the support structure is adhered to at least a portion of a surface of the three dimensional model;
• and
• wherein the amorphous thermoplastic resin comprises
• (a) (1) a copolycarbonate of Bisphenol A carbonate units and Bisphenol Isophorone carbonate units, and
• (2) a Bisphenol A polycarbonate homopolymer, or
• (b) (1) 95.5 to 99.5 weight percent of a polycarbonate resin comprising
• (i) a copolycarbonate of Bisphenol A carbonate units and Bisphenol Isophorone carbonate units or a BPI polycarbonate homopolymer, and
• (ii) optionally a Bisphenol A polycarbonate homopolymer, and
• (2) 0.5 to 4.5 weight percent of a high viscosity silicone having a kinematic viscosity from 600,000 to 20 million centistokes at 25° C.,
• based upon the combined weight of the polycarbonate resin and the high viscosity silicone, and wherein the high viscosity silicone is immiscible with the polycarbonate resin.

A method of fused filament fabrication, the method comprising:

• melting a portion of a first filament to form a first thermally-solidifiable material in molten form, and dispensing the first thermally-solidifiable material in molten form in a predetermined pattern so as to define a three-dimensional model, wherein the first thermally-solidifiable material comprises a polyetherimide or a polysulfone;
• and
• melting a portion of a second filament to form a second thermally-solidifiable material in molten form, and, in coordination with the dispensing the first thermally solidifiable material, dispensing the second thermally-solidifiable material in molten form so as to define a support structure for the three-dimensional model;
• wherein the second thermally-solidifiable material comprises an amorphous thermoplastic resin further comprising Bisphenol Isophorone carbonate units and Bisphenol A carbonate units, wherein the Bisphenol Isophorone carbonate units are 30 to 50 mole percent of the total of Bisphenol A carbonate units and Bisphenol Isophorone carbonate units in the amorphous thermoplastic resin;
• and
• wherein the amorphous thermoplastic resin has a glass transition temperature from 165° C. to 200° C.