International Business Machines Corporation

Agency for Science, Technology and Research

Carbon, Inc.

Mu San Zhang

James L Hedrick

Jeannette M Garcia

Yi Yan Yang

Mareva B Fevre

Rudy J Wojtecki

Dylan J Boday

Jason P Rolland

Nathaniel H Park

Alshakim Nelson

Amanda Catherine Engler

Wei Han

Justin Poelma

Robert J Ono

Julian M W Chan

Kai Chen

Joseph M DeSimone

Gregory Breyta

Victoria A Piunova

Daniel Joseph Coady

Xinyu Gu

Pang Kern Jeremy Tan

Jye Yng Teo

Ankit Vora

Hareem Tariq Maune

Andrew Gordon Wright

Shaoqiong Liu

Provided herein are methods of recycling additively manufactured objects (e.g., stereolithographically produced objects), the additively manufactured objects comprising linear polyurethane, branched polyurethane, linear polyurea, branched polyurea, a copolymer thereof, or a combination thereof. Compositions comprising the same and methods of use thereof are also provided.

Sustainable additive manufacturing resins and methods of recycling

Provided herein are methods of making a reactive particulate material by free radically polymerizing a single-cure resin to produce a polymer, the resin comprising: a reactive blocked polyurethane prepolymer, a reactive blocked polyurea prepolymer, a reactive blocked polyurethane-polyurea copolymer, or a combination thereof, wherein said polymerizing is carried out by dispersive polymerization (e.g., an emulsion, suspension or dispersion polymerization process), to form said reactive particulate material. Methods of use of the reactive particulate material and material sets including the same are also provided.

Reactive particulate materials useful for additive manufacturing

Provided herein are methods of recycling additively manufactured objects, which may include making a reactive particulate material by recycling preformed articles or recovered coating material. Methods of use of the reactive particulate material and material sets including the same are also provided.

Sustainable chemistry systems for recyclable dental models and other additively manufactured products

Provided herein is a method of forming a three-dimensional object in which the polymerizable liquid includes a mixture of (i) a light polymerizable first component, and (ii) a heat polymerizable second component; the heat polymerizable second component comprising (i) a first blocked reactive constituent that is blocked with a volatile blocking group, and optionally (ii) a curative. Upon heating a formed three-dimensional intermediate sufficiently, the volatile blocking group is cleaved and vaporizes out of the three-dimensional intermediate, to form the three-dimensional object. Also provided is a three-dimensional object produced by the method. Further provided is a polymerizable liquid composition useful for carrying out the method, and prepolymers and monomers useful for the polymerizable liquid composition.

Blocking groups for light polymerizable resins useful in additive manufacturing

Techniques regarding ionene compositions with antimicrobial functionality are provided. For example, one or more embodiments can comprise a monomer, which can comprise a single ionene unit. The single ionene unit can comprise a cation distributed along a molecular backbone. Also, a hydrophobic functional group can be covalently bonded to the molecular backbone, and the single ionene unit can have antimicrobial functionality.

Monomer compositions with antimicrobial functionality

Techniques regarding ionene and/or polyionene compositions with antimicrobial functionality and enhanced hydrophilicity are provided. For example, one or more embodiments can regard a chemical compound that can comprise an ionene unit, which can comprise a cation distributed along a degradable backbone. The degradable backbone can comprise a terephthalamide structure. The ionene unit can have antimicrobial functionality. Further, the chemical compound can comprise a hydrophilic functional group covalently bonded to the ionene unit. Also, the chemical compound can have carbohydrate mimetic functionality.

Hydrophilic polymers with antimicrobial functionalities

Methods, compounds, and compositions described herein generally relate to hemiaminal organogel networks (HDCNs) and methods of forming HDCNs. In some embodiments, a hemiaminal organogel has a plurality of first polymers, each having a first end and a second end, a plurality of second polymers, each having a first end and a second end, and a plurality of trivalent aminal-hemiaminal linkages. The first end of each polymer of the plurality of first polymers may be covalently bonded to a first trivalent aminal-hemiaminal linkage. The second end of each polymer of the plurality of first polymers may be covalently bonded to a second trivalent aminal-hemiaminal linkage. The first end of each polymer of the plurality of second polymers may be covalently bonded to one of the plurality of trivalent aminal-hemiaminal linkages. The second end of each polymer of the plurality of second polymers may be non-covalently bonded.

Tailorable viscoelastic properties of PEG-hemiaminal organogel networks

A block copolymer includes a water-soluble block that is bonded to one or more hydrophobic polycarbonate blocks that include pendant fluoroaryl substituents.

Polycarbonate based pi-pi stabilized nano-objects and hydrogels

A number of cationic antimicrobial polymers have been synthesized by a condensation polymerization in bulk. The initial polymer formed has backbone tertiary nitrogens, which are subsequently quaternized using a suitable quaternizing agent (e.g., alkyl halide). The cationic polymers include polyamides, polycarbonates, polypolyureas and polyguanidiniums having a cationic repeat unit comprising the quaternary ammonium nitrogen as a backbone nitrogen. The cationic polymers can be active against Gram-negative, Gram-positive microbes, and/or fungi.

Condensation polymers for antimicrobial applications

A thermo-responsive shear-thinning photo-curable composition comprises water, a linear amphiphilic polyether ABA triblock copolymer comprising at least one pendent ene group (*&#x2014;CH&#x2550;CH) capable of undergoing a thiol-ene reaction, a water-soluble crosslinking agent comprising two or more methylenethiol groups (*&#x2014;CHSH), and a photoinitiator. Under non-shear conditions and a triblock copolymer concentration suitable for direct-write printing, the composition is a viscoelastic solid (hydrogel) at a temperature of about 15&#xb0; C. to about 45&#xb0; C., and is a free-flowing liquid (sol) between 0&#xb0; C. and about 10&#xb0; C. The hydrogel form can be shear-thinned at about 15&#xb0; C. to about 45&#xb0; C. to form a sol suitable for a direct-write printer using an extruding print-head. The compositions covalently crosslink when flood-exposed to ultraviolet radiation. The compositions have utility in forming three-dimensional scaffolds for growing living cells.

Hydrogel compositions for direct-write printing applications

Cationic antimicrobial polymers have been synthesized by a bulk addition polymerization of a nucleophilic agent comprising two tertiary amines and an electrophilic agent that comprises two leaving groups and an aromatic ring between the leaving groups. The reaction solvent for the polymerization is chosen to allow precipitation of the cationic polymer at the polymerization temperature, thereby limiting molecular weight. Quaternization and polymerization occur concurrently. The cationic polymers can be highly active against Gram-negative and Gram-positive microbes, and/or fungi. The cationic polymers can also be non-hemolytic and non-cytotoxic at the effective concentration against the microbes.

Growing community of inventors

San Jose, CA, United States of America

Mu San Zhang