A radiation curable gravure ink, comprising: cationic polymerizable compound comprising a hydroxyl-containing oxetane-based compound and an alicyclic epoxy-based compound; a cationic photoinitiator; a pigment; and filler.

A radiation curable gravure ink, comprising: cationic polymerizable compound comprising a hydroxyl-containing oxetane-based compound and an alicyclic epoxy-based compound; a cationic photoinitiator; a pigment; and filler.

An aqueous ink composition includes a film-forming retardation additive, which enhances the pigment efficiency in the ink composition. A method for making such an ink and a method of printing with such an ink are also disclosed.

An aqueous ink composition includes a film-forming retardation additive, which enhances the pigment efficiency in the ink composition. A method for making such an ink and a method of printing with such an ink are also disclosed.

A method for producing a composite resin particle dispersion includes: performing polymerization A by polymerizing a styrene compound and a vinyl monomer other than the styrene compound to form a styrene-based resin; performing polymerization B by polymerizing a (meth)acrylic acid ester compound in the presence of the styrene-based resin to form intermediate resin particles containing the styrene-based resin and a (meth)acrylic acid ester-based resin; and performing polymerization C by polymerizing a styrene compound and a vinyl monomer other than the styrene compound in the presence of the intermediate resin particles to form composite resin particles. The mass ratio of the styrene-based resin to the (meth)acrylic acid ester-based resin in the composite resin particles is from 80:20 to 20:80. A difference between the lowest glass transition temperature and the highest glass transition temperature in the composite resin particles is 30° C. or more.

The invention aims to provide a crosslinked polymer having an excellent liquid absorption capacity and sufficient gel-pulverizability. The invention relates to a N-vinyl lactam-based crosslinked polymer including: a structural unit derived from a N-vinyl lactam-based monomer; and a structural unit derived from triallyl cyanurate, the N-vinyl lactam-based crosslinked polymer containing the structural unit derived from triallyl cyanurate in a ratio of 0.12 to 0.48 mol % to 100 mol % of all structural units.

The invention aims to provide a crosslinked polymer having an excellent liquid absorption capacity and sufficient gel-pulverizability. The invention relates to a N-vinyl lactam-based crosslinked polymer including: a structural unit derived from a N-vinyl lactam-based monomer; and a structural unit derived from triallyl cyanurate, the N-vinyl lactam-based crosslinked polymer containing the structural unit derived from triallyl cyanurate in a ratio of 0.12 to 0.48 mol % to 100 mol % of all structural units.

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.

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.

A resin syringe includes: a syringe body made of polyolefin, and a printing layer having a shape that extends in a band around an outer surface of the syringe body. The printing layer comprises components including chlorinated polypropylene having a degree of chlorination in a range of 15 to 30%, a colorant, and a filler. A plurality of recessed portions is formed in the outer surface of the syringe body on which the printing layer is printed and the recessed portions form a shape that extends in a band around the outer surface of the syringe body and that is entirely covered by the printing layer. Each of the recessed portions has a depth of 50 nm or more and less than 1 μm and a width of 50 nm or more and less than 1 μm and is filled with at least one of the components of the printing layer.