Ceramic slurries may include ceramic particles, a photoreactive-photostable hybrid binder, and a photoinitiator. The photoreactive-photostable hybrid binder may include a photoreactive organic resin component, a photoreactive siloxane component, and one or more photostable siloxane components. Methods of forming a ceramic part may include curing a portion of a ceramic slurry by exposing the portion of the ceramic slurry to light to form a green ceramic part, and partially firing the green ceramic part to form a brown ceramic part. The brown ceramic part may be sintered at or above a sintering temperature of the ceramic particles to form a ceramic part, wherein sintering includes heating the brown ceramic part to a sufficient temperature to promote reaction bonding that converts silica from the photoreactive-photostable hybrid binder into silicates that bond with the ceramic particles.

The present invention relates to a primer composition that may be applied to tissue in order to increase bond strength between the tissue and a patch, filler or a supporting material. The primer comprises a dithiol component and an allyl containing component together with a photo initiator.

A conventional polymerization inhibitor is for example an agent to scavenge radicals generated during storage of a radical polymerizable compound and used to stably handle the radical polymerizable compound, but is unnecessary when the radical polymerizable compound is to be subjected to radical polymerization reaction, and is preferably removed at the time of the radical polymerization reaction. The object of the present invention is to obviate inconvenience of removing the polymerization inhibitor at the time of radical polymerization. The radical polymerization control agent contained in a radical polymerizable composition of the present invention functions as a radical polymerization inhibitor for example stored in a dark place, but loses its radical polymerization inhibiting effect when polymerization is initiated while being irradiated with light at a certain specific wavelength at the time of polymerization. Thus, radical polymerization of the radical polymerizable compound is easily initiated without increasing the amount of a radical polymerization initiator. That is, the radical polymerization control agent of the present invention is a radical polymerization control agent which is a corn pound having an effect to inhibit radical polymerization of a radical polymerizable compound and which loses the radical polymerization inhibiting effect under irradiation with light rays containing light within a wavelength range of from 300 nm to 500 nm.

A curable resin composition includes: an oxetane compound (A) having one oxetanyl group as a cationic polymerizable reactive group and at least one hydroxyl group; a cationic polymerizable compound (B) which is a cationic polymerizable compound other than the oxetane compound (A) and has two or more cationic polymerization reactive groups; a rubber particle (C); and a curing agent (D), wherein the oxetane compound (A) is contained at 30 parts by mass or more and 60 parts by mass or less, based on 100 parts by mass of total mass of the oxetane compound (A) and the cationic polymerizable compound (B), and the rubber particle (C) has a group capable of reacting with the oxetane compound (A) or the cationic polymerizable compound (B) on a surface of the rubber particle (C).

Radiation curable aqueous compositions (I) with reduced photo-yellowing are provided. Said composition comprises water, at least one ethylenically unsaturated compound and at least one carboxylic acid hydrazide-containing compound (H) in an amount sufficient to reduce photo-yellowing. Materials of the invention have the advantage that they help to reduce photo-yellowing. They may have a beneficial effect on long term yellowing caused by weathering too. Compositions (I) of the invention allow a better quality control of products and materials just after cure. Materials of the invention can be used to make coatings, inks, paints, varnishes and adhesives and they are further suitable for the making of composites, gel coats, 3D-curing and the making of 3D-objects in general.

Described herein are thermoset compositions and kits of compositions suitable for use in additive fabrication processes including high concentrations of urethane methacrylate oligomers having at least one polymerizable group, and a number average molecular weight from 750 to 4000 g/mol, an effective quantity of a monofunctional reactive diluent monomer, a defined concentration of a network building agent having a molecular weight that is lower than the urethane methacrylate oligomer, optionally a photoinitiator, and optionally, additives. Also disclosed are methods of creating three-dimensional parts via additive fabrication processes utilizing urethane methacrylate oligomer-centric compositions, wherein various exposure irradiances, cure temperatures, and oxygen content levels are prescribed, as well as the articles cured therefrom.

A photoradical polymerization initiator that is environmentally friendly and composed solely of carbon, hydrogen and oxygen atoms, generating no acid that may cause corrosion during a radical polymerization reaction, and having a high radical polymerization initiation capacity to light having a wavelength of 350 nm to 420 nm. A photoradical polymerizable composition including a radical polymerizable compound and a photoradical polymerization initiator, where the photoradical polymerization initiator is a 1,4-dihydroxy-2-naphthoic acid compound represented by formula (1):

##STR00001##

where R is a hydrogen atom, a C.sub.1-10 alkyl group or a C.sub.6-14 aryl group, and X is a hydrogen atom, a C.sub.1-10 alkyl group, a C.sub.6-14 aryl group, a hydroxy group, a C.sub.1-10 alkoxy group or a C.sub.6-14 aryloxy group.

This photosensitive resin composition comprises: a photosensitive prepolymer having a carboxyl group and an ethylenically unsaturated group; a photopolymerization initiator; a thermosetting agent; and a pigment. The thermosetting agent is a polycarbodiimide compound represented by formula (1), in which a carbodiimide group is protected by an amino group that dissociates at temperatures of 80□ or greater. The polycarbodiimide compound has a weight average molecular weight of 300-3000, and a carbodiimide equivalent weight of 150-600. When formed into a film having a dry film thickness of 10-40 μm, the maximum value of the transmittance of the photosensitive resin composition is at least 7% for the transmission spectrum of at least some of the wavelength from 350-430 nm. (In formula (1), R.sup.1, R.sup.2, X.sup.1, X.sup.2, and n are as defined in the description.)

A method for generating reactive species in a medium in which light irradiates the medium including a nanoparticle. A photoinitiator composed of semiconductor nanoparticles for photo-polymerization and 2D and 3D printing.

Biocompatible phase invertible proteinaceous compositions and methods for making and using the same are provided. The subject phase invertible compositions are prepared by combining a crosslinker and a proteinaceous substrate. The proteinaceous substrate includes one or more proteins and a polyamine, where the polyamine and a proteinaceous substrate are present in synergistic viscosity enhancing amounts, and may also include one or more of: a carbohydrate, a tackifying agent, a plasticizer, or other modification agent. In certain embodiments, the crosslinker is a heat-treated dialdehyde, e.g., heat-treated glutaraldehyde. Also provided are kits for use in preparing the subject compositions. The subject compositions, kits and systems find use in a variety of different applications.