摘要:
A photosensitive silver halide emulsion has been disclosed, containing tabular silver halide grains present in a numerical amount of at least 50%, said tabular grains having an average aspect ratio of at least 1.2, an average equivalent circular grain diameter of at least 0.1 &mgr;m and an average grain thickness of less than 0.3 &mgr;m, characterized in that said grains further include an organic hole trapping dopant. In a particular embodiment said photosensitive silver halide emulsion is containing tabular silver halide grains having a core and an outermost shell, wherein said outermost shell of the grains includes an organic hole trapping dopant satisfying formula (I): wherein X and Y each independently represent O, S or Se; R1 and R2 each independently represents and R represents hydrogen, a substituted or unsubstituted alkyl, a substituted or unsubstituted aryl, a substituted or unsubstituted aralkyl a substituted or unsubstituted heteroaryl; wherein R1 and R2 can be the same or different and may form a ring; E represents a group linked to the carbon atom by a heteroatom, having at least one free electron pair; M+ is a proton or an inorganic or organic counterion; m and n each represents an integer wherein m equals 1 and n equals 1 or 2.
摘要翻译:公开了一种感光卤化银乳剂,其含有数量至少为50%的片状卤化银颗粒,所述片状颗粒的平均纵横比至少为1.2,平均当量圆形晶粒直径至少为0.1μm, 平均晶粒厚度小于0.3μm,其特征在于,所述晶粒还包括有机空穴俘获掺杂剂。在特定实施方案中,所述感光卤化银乳剂包含具有芯和最外壳的片状卤化银颗粒,其中所述最外壳 的颗粒包括满足式(I)的有机空穴捕获掺杂剂:其中X和Y各自独立地表示O,S或Se; R 1和R 2各自独立地表示并且R表示氢,取代或未取代的烷基,取代或未取代的芳基, 取代或未取代的芳烷基取代或未取代的杂芳基;其中R1和R2可以相同或不同 nd可以形成环; E表示通过具有至少一个自由电子对的杂原子与碳原子连接的基团; M +是质子或无机或有机抗衡离子; m和n各自表示其中m等于1的整数, n等于1或2。
摘要:
A non-aqueous pigment dispersion includes a pigment, a non-aqueous dispersion medium, and a polymeric dispersant including at least one oxalylamide structural unit according to Formula (I): wherein: R1 represents a first polymeric moiety selected from the group consisting of a linear polymeric moiety, a star shaped polymeric moiety, a dendritic polymeric moiety, a branched polymeric moiety, and a hyperbranched polymeric moiety; and R2 represents a second polymeric moiety selected from the group consisting of a polyester, a polyether, a polyamide, a polyacrylate, a polymethacrylate, or copolymers thereof.
摘要:
A polymerizable Norrish Type II photoinitiator according to Formula (I): Radiation curable compositions and inkjet inks containing the polymerizable Norrish Type II photoinitiator of Formula (I) exhibit improved compatibility with and solubility in radiation curable compositions and inkjet inks, and exhibit low extractable amounts of the photoinitiator and its residues after curing.
摘要:
A radiation curable composition comprising a curable compound, a photo-initiator and a co-initiator characterized in that said co-initiator is represented by Formula I, wherein MA is the residue of a mono- or oligofunctional Michael acceptor; L is a divalent linking group positioning the two tertiary amines in a 1-3 to 1-10 position, with the proviso that both amines are aliphatic; R1, R2 and R3 independently represent an optionally substituted alkyl group, an optionally substituted alkenyl group , an optionally substituted alkynyl group or an optionally substituted (hetero) alkaryl group; any two of R1, R2 and R3 may represent the necessary atoms to form a ring; any two of R1, R2 and R3 may represent the necessary atoms to form a ring with any of the atoms of the linking group L; n is an integer ranging from 1 to 6.
摘要:
A heat-sensitive positive-working lithographic printing plate precursor comprising (1) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (2) a heat-sensitive coating, comprising an underlayer on said support and thereon an upperlayer, an IR absorbing agent in at least one of said underlayer and upperlayer, a phenolic resin in said upperlayer, and a first polymer in said underlayer, characterized in that said first polymer is an alkaline soluble polymer comprising a first sulfonamide containing monomeric unit having a specified structure according to formula I or formula II and a second amide containing monomeric unit having a specified structure according to formula III. The printing plates show an improved chemical resistance of the coating and a reduced undercutting of the image forming parts of the coating.
摘要:
A radiation curable composition comprising a curable compound, a photo-initiator and a co-initiator, wherein said co-initiator has a structure according to Formula I A-L-B Formula I wherein A represents a structural moiety comprising an aromatic tertiary amine; B represents a structural moiety comprising at least one aliphatic tertiary amine; L represents a divalent linking group positioning the nitrogen atom of the aromatic amine of the structural moiety A and the nitrogen of at least one aliphatic amine of the structural moiety B in a 1-3 to 1-23 position; with the proviso that at least one aromatic and at least one aliphatic amine each have at least one alfa-hydrogen.
摘要:
A radiation curable composition comprising a novel photoreactive polymer is disclosed comprising a dendritic polymer core with at least one initiating functional group and at least one co-initiating functional group.Suitable radiation curable compositions are varnishes, lacquers, printing inks and radiation curable ink-jet inks. The dendritic polymeric core is preferably a hyperbranched polymer.
摘要:
A pigment dispersion comprising a colour pigment and a polymeric dispersant having at least one pending chromophore group covalently bound to the polymeric backbone of the polymeric dispersant through a linking group wherein the at least one pending chromophore group is a derivative from a colour pigment selected from the group consisting of monoazo pigments, disazo pigments, β-naphtol pigments, naphtol AS pigments, azo pigment lakes, benzimidazolone pigments, disazo condensation pigments, metal complex pigments, isoindolinone pigments, isoindolinine pigments, phthalocyanine pigments, quinacridone pigments, diketopyrrolo-pyrrole pigments, thioindigo pigments, anthraquinone pigments, anthrapyrimidine pigments, indanthrone pigments, flavanthrone pigments, pyranthrone pigments, anthanthrone pigments, isoviolanthrone pigments, aluminium pigment lakes, dioxazine pigments, triarylcarbonium pigments and quinophthalone pigments; the at least one pending chromophore group is a chromophore group occurring as a side group on the polymeric backbone and not a group in the polymeric backbone itself or occurring solely as an end group of the polymeric backbone; the linking group consists of all the atoms between the polymeric backbone and the first atom of the aromatic group by which the pending chromophore group is linked to the polymeric backbone; the polymeric dispersant has a polymeric backbone with a polymerization degree between 5 and 1000; and at most 30% of the monomer units of the polymeric backbone have a pending chromophore group. The pigment dispersion can be advantageously used in inkjet inks.Also disclosed is a method for preparing the pigment dispersion comprising the step of preparing the polymeric dispersant by copolymerizing a monomer already containing the pending chromophore group.
摘要:
A heat-sensitive lithographic printing plate precursor is disclosed which comprises a hydrophilic support and an oleophilic coating comprising an infrared absorbing agent and a developer soluble polymer which comprises a phenolic monomeric unit wherein the phenyl group of the phenolic monomeric unit is substituted by a group Q, wherein Q has the structure and is covalently linked to a carbon atom of the phenyl group and wherein L1, L2 and L3 are linking groups, a, b and c are 0 or 1, and T1, T2 and T3 are terminal groups. The polymer, substituted by the group Q, increases the chemical resistance of the coating.
摘要:
A pigment dispersion includes a color pigment and a polymeric dispersant having at least one pending chromophore group covalently bound to the polymeric backbone of the polymeric dispersant through a linking groupwherein the color pigment is selected from the group consisting of monoazo pigments, disazo pigments, β-naphtol pigments, naphtol AS pigments, azo pigment lakes, benzimidazolone pigments, disazo condensation pigments, metal complex pigments, isoindolinone pigments, isoindolinine pigments, phthalocyanine pigments, quinacridone pigments, diketopyrrolo-pyrrole pigments, thioindigo pigments, anthraquinone pigments, anthrapyrimidine pigments, indanthrone pigments, flavanthrone pigments, pyranthrone pigments, anthanthrone pigments, isoviolanthrone pigments, aluminium pigment lakes, dioxazine pigments, triarylcarbonium pigments and quinophthalone pigments; the at least one pending chromophore group has a molecular weight which is smaller than 85% of the molecular weight of the color pigment; the at least one pending chromophore group occurs as a side group on the polymeric backbone and not as a group in the polymeric backbone itself or occurring solely as an end group of the polymeric backbone; the linking group consists of all the atoms between the polymeric backbone and the first atom of the aromatic group by which the pending chromophore group is linked to the polymeric backbone; and the at least one pending chromophore group has a similarity coefficient SIM of at least 0.75, with the similarity coefficient defined by: SIM = t · C M + P - C wherein, M represents the number of atoms in the at least one pending chromophore group; P represents the number of atoms in the color pigment; C represents the largest number of atoms in common between the at least one pending chromophore group and the color pigment as one continuous structure; and t is an integer representing the number of times that the largest number of atoms in common C fits into the organic color pigment, without using atoms of the color pigment twice. A method for preparing the pigment dispersion wherein the polymeric dispersant is prepared by copolymerizing a monomer already containing the pending chromophore group is also disclosed.