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AssigneeThe University of Akron
InventorsMatthew Becker, Yongjun Shin, Gaelle Le Fer
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In various embodiments, the present invention is directed to a PPF-based copolymer for 3D printing applications and methods for its making and use. These copolymers have a viscosity in a printable viscosity range and allow light transmittance at curing wavelengths. In various embodiments, a lower viscosity copolymers are obtained by substitution of a portion of maleic anhydride with succinic anhydride and then forming a poly(propylene fumarate-co-succinate) copolymer by the copolymerization of maleic anhydride and succinic anhydride with propylene oxide via Mg(BHT)2(THF)2 catalyzed ring opening copolymerization (ROCOP). Because of their lower viscosities, these copolymers require less, if any, diethyl fumarate (DEF) to prepare the 3D printing resin, while the mechanical properties can still be adjusted as with a PPF polymer prepared without the succinic anhydride.
A polymer composition comprising one or more isomerized residues of maleic anhydride monomer, one or more residues of succinic anhydride monomer and one or more residues of propylene oxide monomer and having a mass distribution () of from about 1 to about 1.5, wherein said polymer composition comprises from about 1 to about 30 mole percent succinic anhydride residues.
A polymer for use in 3D printable resins comprising the isomerized reaction product of maleic anhydride, succinic anhydride and propylene oxide having an absorbance at wavelengths from about 305 nm to about 405 nm of from about 0.001 to about 0.2 as measured by a UV-Visible spectrometer.
Dependencies are inferred from the claim text.