An example of an anti-coalescing agent for a three-dimensional (3D) printing process includes a vehicle and an anti-coalescing polymer dispersed in the vehicle. The vehicle includes a co-solvent, a surfactant, a humectant, and water. The anti-coalescing polymer has a mean particle size ranging from about 50 nm to about 195 nm, and the anti-coalescing polymer is to coat polymeric build material particles to prevent the polymeric build material particles from coalescing during electromagnetic radiation exposure of the 3D printing process.

Print materials described herein include a first polymerization initiator comprising an initiator material having a thermal decomposition rate and a peak photo-initiated decomposition rate, wherein the thermal dissociation rate is higher than the peak photo-initiated decomposition rate; a vinylic monomer; a polyfunctional monomer; scattering particles; and quantum dots. Methods of making a quantum dot material using such print materials, and of incorporating into light emitting devices, are also described.

Print materials described herein include a first polymerization initiator comprising an initiator material having a thermal decomposition rate and a peak photo-initiated decomposition rate, wherein the thermal dissociation rate is higher than the peak photo-initiated decomposition rate; a vinylic monomer; a polyfunctional monomer; scattering particles; and quantum dots. Methods of making a quantum dot material using such print materials, and of incorporating into light emitting devices, are also described.

The present invention relates to a novel serie of α-disilyloxyketones, which are useful as photoinitiators (PIs), and to compositions comprising said photoinitiators.

The present invention relates to a novel serie of α-disilyloxyketones, which are useful as photoinitiators (PIs), and to compositions comprising said photoinitiators.

In one aspect, inks for use with a three-dimensional printing system are described herein. In some embodiments, an ink described herein is a composite ink. Such a composite ink, in some cases, comprises an optically transparent or substantially transparent carrier ink comprising a curable material; and a colorant dispersed in the carrier ink in an amount of about 0.01 to 5 weight %, based on the total weight of the composite ink.

In one aspect, inks for use with a three-dimensional printing system are described herein. In some embodiments, an ink described herein is a composite ink. Such a composite ink, in some cases, comprises an optically transparent or substantially transparent carrier ink comprising a curable material; and a colorant dispersed in the carrier ink in an amount of about 0.01 to 5 weight %, based on the total weight of the composite ink.

The present teachings relate to various embodiments of ink compositions, which once printed and cured on a substrate form a continuous composite film layer that includes a first pattern of polymeric areas having a first refractive index (RI) interspersed within a second pattern of polymeric areas having an RI that is higher in comparison to the RI of the first pattern of polymeric areas. Various embodiments of composite thin films so formed on a substrate can be tuned so as to enhance light outcoupling or extraction for various light-emitting devices of the present teachings, such as, but not limited by, an OLED display or lighting device.

The present teachings relate to various embodiments of ink compositions, which once printed and cured on a substrate form a continuous composite film layer that includes a first pattern of polymeric areas having a first refractive index (RI) interspersed within a second pattern of polymeric areas having an RI that is higher in comparison to the RI of the first pattern of polymeric areas. Various embodiments of composite thin films so formed on a substrate can be tuned so as to enhance light outcoupling or extraction for various light-emitting devices of the present teachings, such as, but not limited by, an OLED display or lighting device.

Provided is an ink composition for use in drop on demand inkjet printing such as piezoelectric drop on demand inkjet printing. The ink composition has a phosphine oxide initiator and benzyl acrylate. The amount of benzyl acrylate is less than 40 wt % based on the total weight of the ink composition and the total amount of mono-functional monomers is less than 45 wt % based on the total weight of the ink composition. The phosphine oxide initiator is a bis-acyl phosphine oxide, a benzoyl alkyl phosphinate, or a mixture thereof. The ink compositions are suitable for radiation curing and have good cure properties or good adhesion properties.