A dual-cure resin formulation having an improved pot life is described. The dual cure resin may be used to fabricate a CMP pad using a 3D printing process.

A thermosetting composition comprising: (A) a compound represented by the formula (A2) or (A3), (B) a thermal polymerization initiator, and (E) an inorganic filler.

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A method of printing a hydrogel-based device includes contacting a monomer, a crosslinker, a photoinitiator, and a precursor salt with a solvent to form an ink solution, printing the ink solution onto a substrate, exposing the ink solution to light, sufficient to form a hydrogel, and contacting the hydrogel with a reducing agent sufficient to precipitate nanoparticles from the precursor salt in the hydrogel.

A photocurable resin composition contains a radically polymerizable compound (A), polysilsesquioxane particles (B), and a curing agent (C). Polysilsesquioxane particles (B) have polysilsesquioxane at least at the surface of the particles. The radically polymerizable compound (A) is a mixture of multifunctional radically polymerizable compound (A-1) and monofunctional radically polymerizable compound (A-2), including at least multifunctional radically polymerizable compound (A-1) in more than 60% by mass. Multifunctional radically polymerizable compound (A-1) has an ethylenically unsaturated group equivalent of 250 g/eq to less than 700 g/eq. The amount of polysilsesquioxane particles (B) is 5 to 30 parts by mass relative to 100 parts by mass of radically polymerizable compound (A).

Exemplary arrangements include articles and methods of producing plastic material objects. Such objects may be configured for use as an ocular implant, and intraocular lens, or a contact lens. Exemplary methods include ablating and polishing plastic material in a processing region of a plastic material object through operation of at least one laser such that some material in the region is de-crosslinked. Exemplary methods also include subsequently irradiating the processing region to at least partially re-cross-link the plastic material.

The present disclosure provides a miktoarm polymer having the following structure:

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where polymer chain 1, 2, 3, 4, A.sup.1 and A.sup.2 are as defined herein. These miktoarm polymers can produce desirable polymeric materials and being used as a component in photo-curable resins. Further provided herein are methods of producing miktoarm polymers, as well as compositions, resins, devices, and polymeric materials by use of the same. Also provided herein are methods of using miktoarm polymers, resins, and polymeric materials for the fabrication (e.g., via 3D printing) of medical devices, such as orthodontic appliances.

Compositions which are curable by, for example, exposure to radiation to form useful articles such as three-dimensionally printed objects are prepared using multistage polymers, polymerizing organic substances and (meth)acrylic polymers. The multistage polymer is effective to toughen and impact modify the cured articles, yet the compositions prior to curing are relatively low in viscosity and agglomerate content even at high loadings of multistage polymer.

A solid freeform fabrication powder material includes a metal particle, and a water-soluble organic material particle. The water-soluble organic material particle accounts for 2-18 percent by volume of the solid freeform fabrication powder material and the water-soluble organic material particle has a volume average particle diameter of 3-15 m.

The present invention relates to a method of finalizing a 3D printed dental prosthesis by subjecting the dental prosthesis to a pressurized water stream comprising glass beads. Also disclosed is a 3D printed dental prosthesis or component thereof prepared by the inventive method; and a method of providing a patient in need thereof with the 3D printed dental prosthesis or component thereof by inserting same into the oral cavity of the patient.

Embodiments of the invention provide a composition for shielding radiation, including 100 parts by weight of a first resin including one or more selected from the group consisting of a polyurethane resin, a polysiloxane resin, a silicone resin; a fluorine resin, an acrylic resin, and an alkyd resin; 5 to 30 parts by weight of a second resin including one or more selected from the group consisting of polyvinyl alcohol (PVA), medium-density polyethylene (MDP E), high-density polyethylene (HDPE), and low-density polyethylene (LDPE); 5 to 30 parts by weight of a polyether ether ketone (PEEK) resin powder; 5 to 80 parts by weight of a metal powder; 1 to 70 parts by weight of a metal oxide powder; 1 to 50 parts by weight of paraffin; 5 to 15 parts by weight of a boron compound; and 10 to 50 parts by weight of a carbon powder. Accordingly, a fiber complex, protective clothing, and the like including the composition for shielding radiation of the present invention includes a PEEK resin without use of lead, and thus, may shield even neutron rays as well as radiation, such as alpha rays, beta rays, proton rays, gamma rays, and X-rays.