This disclosure relates to a method of 3-D printing comprising: applying a layer of build material onto a print platform, wherein the build material comprises particles of a polymer comprising polymer chains having at least one reactive group that is protected with a protecting group; printing a de-protecting agent at selected locations on the layer of build material; and coalescing particles of the polymer at the printed locations on the layer of build material to form a coalesced polymer layer.

A polymer for an electron injection layer, an electron injection layer, an OLED device, and a display device are disclosed. The polymer includes a unit A and a unit B, in which the unit A is an aromatic group; and the unit B is a group represented by one of six possible formulae disclosed herein. The electron injection layer includes the polymer. The OLED device includes an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, the electron injection layer, and a cathode stacked in sequence.

A polymer for an electron injection layer, an electron injection layer, an OLED device, and a display device are disclosed. The polymer includes a unit A and a unit B, in which the unit A is an aromatic group; and the unit B is a group represented by one of six possible formulae disclosed herein. The electron injection layer includes the polymer. The OLED device includes an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, the electron injection layer, and a cathode stacked in sequence.

A pigment textile printing ink jet ink composition contains a pigment, a resin particle, a nonionic fluorine-based surfactant, and water.

A pigment textile printing ink jet ink composition contains a pigment, a resin particle, a nonionic fluorine-based surfactant, and water.

An example of an inkjet pre-treatment fluid for dye sublimation printing consists of a humectant; a cationic polymer; a surfactant; a co-solvent present in an amount up to about 50 wt % based on a total weight of the inkjet pre-treatment fluid; and a balance of water. In an example of a printing method, the inkjet pre-treatment fluid is inkjet printed onto a textile substrate to form a pre-treated area on the textile substrate.

An example of an inkjet pre-treatment fluid for dye sublimation printing consists of a humectant; a cationic polymer; a surfactant; a co-solvent present in an amount up to about 50 wt % based on a total weight of the inkjet pre-treatment fluid; and a balance of water. In an example of a printing method, the inkjet pre-treatment fluid is inkjet printed onto a textile substrate to form a pre-treated area on the textile substrate.

A support material for use in additive manufacturing includes greater than about 30 weight percent up to about 70 weight percent of a C.sub.12 to C.sub.18 fatty alcohol ethoxylate, about 30 weight percent to about 70 weight percent of a C.sub.16 to C.sub.22 fatty alcohol, and a tackifier, a transition temperature measured as the temperature immediately before phase change, based on viscosity measurement, is less than about 65° C. A system for additive manufacturing includes such a support material and a build material, the ratio of C.sub.12 to C.sub.18 fatty alcohol ethoxylate to C.sub.16 to C.sub.22 fatty alcohol is selected for property matching of the support material to the build material. A method of additive manufacturing includes providing such a system and printing via an inkjet printer the support material and the build material to provide a precursor to a three-dimensional printed article.

A support material for use in additive manufacturing includes greater than about 30 weight percent up to about 70 weight percent of a C.sub.12 to C.sub.18 fatty alcohol ethoxylate, about 30 weight percent to about 70 weight percent of a C.sub.16 to C.sub.22 fatty alcohol, and a tackifier, a transition temperature measured as the temperature immediately before phase change, based on viscosity measurement, is less than about 65° C. A system for additive manufacturing includes such a support material and a build material, the ratio of C.sub.12 to C.sub.18 fatty alcohol ethoxylate to C.sub.16 to C.sub.22 fatty alcohol is selected for property matching of the support material to the build material. A method of additive manufacturing includes providing such a system and printing via an inkjet printer the support material and the build material to provide a precursor to a three-dimensional printed article.

An organic electroluminescence device including: an anode and a cathode; and at least one organic thin film layer between the anode and the cathode, wherein one of the organic thin film layer(s) comprises a polymer represented by the following formula (1). ##STR00001##