Dsm IP Assets B.v.

Stratasys, Inc.

Covestro (netherlands) B.v.

Covestro B.v.

Tai Yeon Lee

Kangtai Ren

Johan Jansen

Luke Kwisnek

Johan Franz Gradus Antonius Jansen

Beth Rundlett

Mingbo He

Caroline Liu

Paulus Steeman

Marco Driessen

Sainath Vaidya

Betty Coussens

Mike Scianna

Robin Papachristopoulos

Brad Seurer

Liquid radiation curable compositions are disclosed which are suitable for hybrid (i.e. cationic and free-radical) polymerization when processed via additive fabrication equipment utilizing sources of actinic radiation with peak spectral intensities in the UV/vis region. According to one aspect, the compositions possess a first photoinitiator that is an iodonium salt of a non-fluorinated borate anion. According to another aspect, the composition is substantially devoid of a Norrish Type I and/or Type II photoinitiator. Also disclosed are methods of creating three-dimensional parts via additive fabrication processes utilizing sources of actinic radiation with peak spectral intensities in the UV/vis region employing liquid radiation curable compositions suitable for hybrid polymerization, and the parts cured therefrom.

Liquid, hybrid UV/VIS radiation curable resin compositions for additive fabrication

Radiation curable compositions for additive fabrication are described and claimed. Such compositions are particularly suited for investment casting applications, and include a cationically polymerizable component, a radically polymerizable component, a certain type of prescribed antimony-free, sulfonium salt-based cationic photoinitiator, and a free-radical photoinitiator. In other embodiments, the composition may also include a photosensitizer and/or a UV/absorber. Also described and claimed is a method for using a liquid radiation curable resin for additive fabrication with a certain type of prescribed antimony-free, sulfonium salt-based cationic photoinitiator and a certain type of prescribed photosensitizer in an investment casting process.

Antimony-free radiation curable compositions for additive fabrication, and applications thereof in investment casting processes

Liquid, hybrid UV/vis radiation curable resin compositions for additive fabrication

Liquid radiation curable compositions are disclosed which are suitable for hybrid (i.e. cationic and free-radical) polymerization when processed via additive fabrication equipment utilizing sources of actinic radiation with peak spectral intensities in the UV/vis region. Also disclosed are methods of creating three-dimensional parts via additive fabrication processes utilizing sources of actinic radiation with peak spectral intensities in the UV/vis region employing liquid radiation curable compositions suitable for hybrid polymerization, and the parts cured therefrom.

Described herein are thermoset compositions suitable for hybrid polymerization when processed via additive fabrication equipment utilizing sources of actinic radiation with peak spectral intensities in the UV and/or visible region containing a photoinitiating package, a cationically curable constituent, a free-radically curable component, and optionally, one or more additives. Such thermoset compositions preferably contain a Norrish Type I photoinitiator that is an alkyl-, aryl-, or acyl-substituted compound centered around a Group 14 atom, and further possesses specified ranges of ionization potential values with respect to its known triplet state. Also disclosed are methods of creating three-dimensional parts via additive fabrication processes utilizing sources of actinic radiation with peak spectral intensities in the UV and/or visible regions employing the claimed thermosetting compositions, along with the parts cured therefrom.

Matrix-filled liquid radiation curable resin compositions for additive fabrication are described and claimed. Such resins include a cationically polymerizable component that is an aliphatic epoxide, a multifunctional (meth)acrylate component, a cationic photoinitiator, a free-radical photo initiator, and a matrix of inorganic fillers, wherein the matrix further constitutes prescribed ratios of at least one microparticle constituent and at least one nanoparticle constituent. Also described and claimed is a process for using the matrix-filled liquid radiation curable resins for additive fabrication to create three dimensional parts, and the three-dimensional parts made from the liquid radiation curable resins for additive fabrication.

Stabilized matrix-filled liquid radiation curable resin compositions for additive fabrication

Growing community of inventors

Crystal Lake, IL, United States of America

Tai Yeon Lee