Virginia Tech Intellectual Properties Inc

Eastman Chemical Company

Elevance Renewable Sciences, Inc.

The Procter Gamble Company

Exxonmobil Chemical Patents Inc.

Sabic Global Technologies B.v.

Shpp Global Technologies B.v.

Solvay Specialty Polymers Usa, LLC

Kimberly-clark Worldwide, Inc.

Carlisle Construction Materials, LLC

Carlisle Intangible Company

Virginia Polytechnic Institute and State University

The Procter & Gamble Company

Timothy Edward Long

Christopher Bryant Williams

Paul A Bertin

Keren Zhang

Ashley M Nelson

Viswanath Meenakshisundaram

Roy Ray Odle

James Rodney Bradley

Travis Kyle Hodgdon

Corey James Kenneally

Sam Richard Turner

William Ronald Darnell

Freddy Arthur Barnabas

Douglas Michael Graham

Guoliang Liu

Callie Elizabeth Zawaski

Allison M Pekkanen

Ke Cao

Yong Yang

Steven Lee Stafford

Allyson J Beuhler

Joel Pollino

Kermit S Kwan

Joseph M Dennis

Anil Shenoy

Michael J Scanish

William Schneider

S Richard Turner

Nicholas Raymond Chartrain

Katherine V Heifferon

Daniel J Cotsakis

Jana Herzberger

Philip J Scott

Ting Chen

Andre Stevenson

Abby Rebecca Whittington

Alison R Schultz

Peijun Jiang

Shriram Bagrodia

David R Fagerburg

Robert Boyd Barbee

Allan S Jones

Kab Sik Seo

Martin Emerson Rogers

Peter Johnson

David Dunlap Cornell

Javier Guzman

Manojkumar Chellamuthu

Stéphane Jeol

Phillip Montgomery Hudnall

Shijing Cheng

William Clayton Bunyard

Donna Sue Davis

Sara Stanley Wells

Emily Tedrow Bell

Haoyu Liu

Syamal Tallury

Harold Blake Sprayberry

Sachin Bobade

Hee Won Kong

Cody Weyhrich

Daniel Rau

Viswanath Meenakshisundarm

Da Ma

Emily M Wilts

Adam E Smith

Justin Sirrine

Annick Moreau

Vincent Duccase

Peggy Spears Birch

Benjamin Tyler White

Maruti Hegde

Sean T Hemp

Ryan J Mondschein

Allison Pekkanen

Liu Guoliang

The present invention relates to relates to a polymer formulation for three-dimensionally (3D) printing an article by stereolithography, the formulation comprising a functionalized polymer. The invention further relates to lithographic methods to form 3D objects that incorporate the aforementioned polymer formulation.

Photocurable polymer compositions

Binders and methods of binder jetting are provided based on the use of branched polymer binders. The applicants have found that, even more so than the molecular weight, the ability to achieve higher maximum printable concentrations leads to higher densities and improved structural properties of the manufactured articles. The methods can be used for a variety of articles from metal parts to structural ceramics, to tablets and other oral dosage forms. The branched chain polymers can include a short-chain branched polymer; a long-chained branched polymer; a hyper-branched polymer, a cyclic polymer; a comb-type polymer; a 3-arm star type polymer, a 4-arm star type polymer, a dendritic polymer, and a combination thereof. The branched-chain polymer can include various polymers such as polyvinylpyrrolidone, poly(vinyl alcohol), or poly(acrylic acid).

Binders and methods of binder jetting including branched polymer binders and articles made therefrom

In various aspects, a polymer resin is provided for vat or ultraviolet-assisted direct ink writing (UV-DIW) photopolymerization. The resin can include a polyamic acid salt formed from the addition of a photocrosslinkable amine to a polyamic acid. The resin can include a photoinitiator suitable for initiating crosslinking of the photocrosslinkable amine when exposed to a light source of a suitable wavelength and intensity. The polyamic acid can be formed, for instance, by the addition of a diamine to a suitable dianhydride. Methods of additive manufacturing using the resins are also provided.

Additive manufacturing of aromatic thermoplastics from photocurable precursor salts

Photocurable colloid binders are provided that overcome deficiencies associated with 3D printing of high molecular weight polymers via VAT photopolymerization. Methods of additive manufacturing are also provided using the binders. The approaches described herein effectively decouple the viscosity-molecular weight relationship by synthesizing and processing photo-reactive aqueous colloids that are sequestered within a photocrosslinkable scaffold. Sequestering polymers within discrete internal phases prevents inter-particle entanglement of the polymer chains, thus ensuring low viscosity. VP of polymer colloids results in a solid green body embedded with high molecular weight polymer particles. A post-processing heated drying step allows the polymers to coalesce and further entangle, forming a semi-interpenetrating network with mechanical performance of the high molecular weight material. The resins can further include inorganic particles such as silica and other ceramics, metal particles, and the like. The coalescence can result in the particles being encapsulated in polymer, yielding unique hybrid materials with tunable properties.

Synthesis and 3D printing of photocurable colloids

Photocurable polymers, photocurable polymer compositions and lithographic processes including the same

In various aspects, a polymer resin is provided for vat photopolymerization. The resin can include a polyamic acid salt formed from the addition of a photocrosslinkable amine to a polyamic acid. The resin can include a photoinitiator suitable for initiating crosslinking of the photocrosslinkable amine when exposed to a light source of a suitable wavelength and intensity. The polyamic acid can be formed, for instance, by the addition of a diamine to a suitable dianhydride. Methods of additive manufacturing using the resins are also provided.

A water-soluble polyurethane derived from: polyethylene glycol, polyethylene glycol-block-polypropylene glycol-block-polyethylene glycol polymer, polypropylene glycol-block-polyethylene glycol-block-polypropylene and mixtures thereof, 1,1'-Carbonyldiimidazole, polyamine and mixtures thereof.

Polymeric materials and articles manufactured there from

Polymer resins for the vat photopolymerization of thermoplastics are provided, in particular for the vat photopolymerization of thermoplastics with exception thermal stability and mechanical properties. In some aspects, the polymer resins are prepared by ring opening of an aromatic dianhydride with an alcohol containing an acrylate or methacrylate to produce a photocrosslinkable diacid monomer; conversion of the photocrosslinkable diacid monomer to a photocrosslinkable diacyl chloride; and polymerization of the photocrosslinkable diacyl chloride with an aromatic diamine to produce a photocrosslinkable precursor polymer. Upon crosslinking and drying, a thermal imidization can yield aromatic polyimide polymers with high yield and with micron-scale structural resolution.

Compositions and methods of additive manufacturing of aromatic thermoplastics and articles made therefrom

A method for manufacturing a three dimensional object includes steps of: providing a digital description of the object as a set of voxels; sequentially creating an actual set of voxels corresponding to the digital set of voxels. At least one voxel comprises a polymer derived from: polyol and an ionic monomer. The calculated charge density of the resulting polymer is 0.01 to 0.7 mEq/g. A three-dimensional object having at least one voxel. The at least one voxel including a polymer derived from: a polyol and an ionic monomer, and the calculated charge density of the resulting polymer is 0.01 to 0.7 mEq/g.

A polyimide oligomer of formula (1a), (1b), a copolymer thereof, or a combination thereof wherein each Gis independently the same or different, and is a cation group; each Gis independently the same or different, and is an anion group; each D is independently the same or different, and is a single bond or Cdivalent hydrocarbon group; each V is independently the same or different, and is a tetravalent Chydrocarbon group; each R is independently the same or different, and is a Cdivalent hydrocarbon group; each n is independently the same or different, and is 1 to 1000, provided that the total of all values of n is greater than 4; and t is 2 to 1000.

Polyetherimide from metal free ionomers

A polyimide composition includes 1 to 99 weight percent, preferably 70 to 99 weight percent, more preferably 75 to 95 weight percent of a first polyimide; and 1 to 99 weight percent, preferably 1 to 30 weight percent, more preferably 2 to 25 weight percent of a second polyimide, wherein the first polyimide and the second polyimide are different, and wherein the polyimide composition has a melt flow rate that is greater than a melt flow rate of the first polyimide and less than a melt flow rate of the second polyimide; an apparent viscosity that is less than an apparent viscosity of the first polyimide and less than an apparent viscosity of the second polyimide; and a notched Izod impact strength that is greater than a notched Izod impact strength of the first polyimide and greater than a notched Izod impact strength of the second polyimide.

Linear and branched polyimide composition

Bibenzoate copolyesters are based on (4,4'-biphenyl dicarboxylic acid-co-3,4&#x2032;-biphenyl dicarboxylic acid) as the diacid component, and on an alicyclic diol compound such as 1,4-cyclohexanedimethanol as a portion of the diol component. Copolyesters are based on 4,4&#x2032;-biphenyl dicarboxylic acid, and/or 3,4&#x2032;-biphenyl dicarboxylic acid as the diacid component and may include a multifunctional acid. Copolymers may optionally base an essentially amorphous morphology, high glass transition temperature, high elongation at break, and/or high melting temperature. A method to make the copolymers controls the characteristics of the copolyester selected from one or a combination of amorphous morphology or degree of crystallinity, Tg, Tm, tensile modulus, flexural modulus, elongation at break, and so on, by selecting the proportions of the 4,4&#x2032;-biphenyl dicarboxylic acid or ester producing equivalent thereof, 3,4&#x2032;-biphenyl dicarboxylic acid or ester producing equivalent thereof, and/or the proportion of the 1,4-cyclohexanedimethanol in the diol component.

Bibenzoate copolyesters and methods to produce them

Liquid crystalline hydroquinone-3,4'-biphenyl dicarboxylate polyesters, and methods of making them. The polyesters may be melt processed at a temperature below the thermal decomposition temperature and the isotropic temperature, and may form a liquid crystalline glass phase. The polyesters may be formed by polycondensation of hydroquinone or a hydroquinone derivative with 3,4&#x2032;-biphenyl dicarboxylic acid.

Liquid crystalline polyester compositions and methods

Polyester compositions are disclosed herein, as well as methods of making and using such polyesters. In some embodiments, the polyesters are formed from monomers derived from natural oils. In some embodiments, the polyesters have lower glass transition temperatures than polyesters of comparable molecular weight.

Renewably derived polyesters and methods of making and using the same

Growing community of inventors

Blacksburg, VA, United States of America

Timothy Edward Long