The present disclosure provides a photo-curable elastic ink composition for three-dimensional printing and the preparation method. The ink composition includes approximately 10%-75% of a soft monomer, approximately 10%-75% of a hard monomer, approximately 5%-20% of a cross-linking agent, approximately 5%-20% of a non-reactive soft resin, approximately 0.5%-10% of a photo-initiator, approximately 0%-0.5% of a colorant, and approximately 0.05%-8% of an auxiliary agent. The soft monomer is capable of generating a homopolymer with a glass transition temperature lower than about 25° C. The hard monomer is capable of generating a homopolymer with a glass transition temperature of about 25° C. or higher. The non-reactive soft resin is a resin without containing any radiation curable group in the molecular structure and having a glass transition temperature less than 0° C.

Biocompatible ink formulations are described herein. In one example, a biocompatible ink formulation includes an ink base and a biocompatible component that, when mixed with the ink base to form the biocompatible ink formulation and subject to curing via ultraviolet light, causes the biocompatible ink formulation to be white.

Energy curable compositions including polyols, and any blend of ethylenically unsaturated monomers and oligomers. The polyols of the invention are essentially free of any ethylenically unsaturated groups. It is preferred that the polyol substances according to the invention have greater than one hydroxy group and preferably have boiling points in excess of 170° C. The compositions of the invention are particularly useful for the printing or coating of food packaging and may be applied via any printing or coating method, although inkjet printing is a preferred method.

Energy curable compositions including polyols, and any blend of ethylenically unsaturated monomers and oligomers. The polyols of the invention are essentially free of any ethylenically unsaturated groups. It is preferred that the polyol substances according to the invention have greater than one hydroxy group and preferably have boiling points in excess of 170° C. The compositions of the invention are particularly useful for the printing or coating of food packaging and may be applied via any printing or coating method, although inkjet printing is a preferred method.

A radiation-curable ink jet composition comprises a polymerizable compound component including a monofunctional monomer component and a multifunctional monomer component. The content of the monofunctional monomer component is 87 mass % or more based on the total amount of the polymerizable compound component, the monofunctional monomer component includes a monofunctional acrylate containing a polycyclic hydrocarbon group, and the weighted average of the glass transition temperatures of homopolymers of the respective polymerizable compounds is 42° C. or more when the mass ratios of the contents of the respective polymerizable compounds are weighted.

This invention relates to a method of making white hollow composite particles by one-step Pickering mini-emulsion polymerization and their application in making white inkjet ink compositions. Each of the particles comprises white inorganic particles; a crosslinked polymer shell; and a hollow core inside the crosslinked polymer shell, and wherein the inorganic particles adhere on the surface of the crosslinked polymer shell. The hollow composite particles have an average diameter ranging from 200 to 1,000 nm and a high degree of whiteness. Furthermore, the structure of the particles remains intact even after they are subjected to repeated centrifugation, decantation, shearing or a combination thereof, which makes them suitable for inkjet ink application. An inkjet ink composition comprising the white hollow composite particles has not only whiteness and shearing stability comparable to those of inkjet ink compositions comprising a traditional white pigment, but also a better dispersion stability than the latter.

This invention relates to a method of making white hollow composite particles by one-step Pickering mini-emulsion polymerization and their application in making white inkjet ink compositions. Each of the particles comprises white inorganic particles; a crosslinked polymer shell; and a hollow core inside the crosslinked polymer shell, and wherein the inorganic particles adhere on the surface of the crosslinked polymer shell. The hollow composite particles have an average diameter ranging from 200 to 1,000 nm and a high degree of whiteness. Furthermore, the structure of the particles remains intact even after they are subjected to repeated centrifugation, decantation, shearing or a combination thereof, which makes them suitable for inkjet ink application. An inkjet ink composition comprising the white hollow composite particles has not only whiteness and shearing stability comparable to those of inkjet ink compositions comprising a traditional white pigment, but also a better dispersion stability than the latter.

The present invention relates to aqueous pigment preparations, comprising (A) at least one organic and/or inorganic pigment and/or filler (B) at least one dispersant of the formula (I) or (II), or mixtures of dispersants of the formulas (I) and (II), where n is an integer greater than or equal to 1, preferably 1 to 5, more preferably 1 to 2, z is an integer greater than or equal to 1, preferably 1 to 10, more preferably 1 to 4, R1 is an aliphatic, linear or branched hydrocarbon radical having 1 to 10 carbon atoms or a hydrogen atom or the structural unit -O-X or the structural unit —CH.sub.2—O—X, and structural unit X corresponds to the formula (III) in which a is an integer from 1 to 10, b is an integer from 0 to 10, c is an integer from 1 to 50, m is 1 or 2, and R2 is an aliphatic, linear or branched hydrocarbon radical having 1 to 10 carbon atoms, (C) optionally wetting agents, (D) optionally further surfactants and/or dispersants, (E) optionally one or more organic solvents and/or one or more hydrotropic substances and/or mixtures thereof, (F) optionally further additives customary for the production of aqueous pigment dispersions, and (G) water.

The present invention relates to aqueous pigment preparations, comprising (A) at least one organic and/or inorganic pigment and/or filler (B) at least one dispersant of the formula (I) or (II), or mixtures of dispersants of the formulas (I) and (II), where n is an integer greater than or equal to 1, preferably 1 to 5, more preferably 1 to 2, z is an integer greater than or equal to 1, preferably 1 to 10, more preferably 1 to 4, R1 is an aliphatic, linear or branched hydrocarbon radical having 1 to 10 carbon atoms or a hydrogen atom or the structural unit -O-X or the structural unit —CH.sub.2—O—X, and structural unit X corresponds to the formula (III) in which a is an integer from 1 to 10, b is an integer from 0 to 10, c is an integer from 1 to 50, m is 1 or 2, and R2 is an aliphatic, linear or branched hydrocarbon radical having 1 to 10 carbon atoms, (C) optionally wetting agents, (D) optionally further surfactants and/or dispersants, (E) optionally one or more organic solvents and/or one or more hydrotropic substances and/or mixtures thereof, (F) optionally further additives customary for the production of aqueous pigment dispersions, and (G) water.

Embodiments of the invention relate to a method of indirect printing with an aqueous ink formulation applied to the surface of the intermediate transfer member. Related apparatus, systems and treatment formulations are disclosed herein.