Abstract: A process for preparing a dispersion of encapsulated solid particles in a predominantly organic liquid vehicle, comprising the following steps: i) providing a dispersion comprising a particulate solid, a liquid medium and a polymeric dispersant having at least 3.0 mmoles of reactive groups per g of dispersant; ii) cross-linking the polymeric dispersant via at least some, but not all, of the reactive groups, said cross-linking being performed in the presence of the particulate solid and the liquid medium and resulting in the encapsulation of each solid particle with a cross-linked polymeric dispersant shell; iii) covalently bonding an end-capping agent to the polymeric dispersant via the reactive groups; said process being such that the final organic liquid vehicle comprises one or more organic liquids and optionally water, provided that water is present at no more than 30% by weight based on the dispersion.

Abstract: A process for preparing a dispersion of encapsulated solid particles in a predominantly organic liquid vehicle, comprising the following steps: i) providing a dispersion comprising a particulate solid, a liquid medium and a polymeric dispersant having at least 3.0 mmoles of reactive groups per g of dispersant; ii) cross-linking the polymeric dispersant via at least some, but not all, of the reactive groups, said cross-linking being performed in the presence of the particulate solid and the liquid medium and resulting in the encapsulation of each solid particle with a cross-linked polymeric dispersant shell; iii) covalently bonding an end-capping agent to the polymeric dispersant via the reactive groups; said process being such that the final organic liquid vehicle comprises one or more organic liquids and optionally water, provided that water is present at no more than 30% by weight based on the dispersion.

Abstract: A process for preparing a dispersion of a particulate solid is described, which comprises dispersing a particulate solid with a dispersant and a liquid medium, wherein the dispersant is a random copolymer obtained from the copolymerisation of a composition comprising: i) optionally one or more monoethylenically unsaturated hydrophilic monomers, ii) one or more monoethylenically unsaturated hydrophobic monomers, iii) one or more di- and/or higher-ethylenically unsaturated monomers, and iv) one or more chain transfer agents wherein at least one of the chain transfer agents has one or more hydrophilic anionic groups.

Abstract: A process for preparing a dispersion of a particulate solid comprising: dispersing a particulate solid with a dispersant and a liquid medium, wherein the dispersant is a random copolymer obtained or obtainable from the copolymerisation of a composition comprising: i) one or more monoethylenically unsaturated hydrophilic monomers, ii) one or more monoethylenically unsaturated hydrophobic monomers, iii) one or more di- and/or higher-ethylenically unsaturated monomers, and iv) one or more chain transfer agents; wherein the dispersion step is effected by a mechanical treatment which reduces the particle size of the particulate solid.

Abstract: A process for preparing a dispersion of a particulate solid comprising: dispersing a particulate solid with a dispersant and a liquid medium, wherein the dispersant is a random copolymer obtained or obtainable from the copolymerisation of a composition comprising: i) one or more monoethylenically unsaturated hydrophilic monomers, ii) one or more monoethylenically unsaturated hydrophobic monomers, iii) one or more di- and/or higher-ethylenically unsaturated monomers, and iv) one or more chain transfer agents; wherein the dispersion step is effected by a mechanical treatment which reduces the particle size of the particulate solid.

Abstract: A compound of Formula (1) or a salt thereof: wherein R is H, methyl or ethyl.

Abstract: A process for printing an image on a substrate comprising applying to the substrate by means of an ink jet printer an ink comprising the components: i) an encapsulated pigment comprising a pigment core and a cross-linked dispersant shell; ii) a binder having a weight averaged molecular weight of at least 5,000 which is or comprises a polyurethane; and iii) a liquid vehicle; wherein the binder is chemically different from the dispersant in the shell. The process provides prints having good highlighter smear resistance. The inks print well and are especially stable.

Abstract: An aqueous dispersion comprising water, pigment particles and a polymeric dispersant comprising monomer repeat units from polymerising one or more ethylenically unsaturated monomers, said dispersant having one or more boronic acid groups. The dispersion is useful for preparing ink jet printing inks having improved durability and highlighter smear fastness when printed onto paper.

Abstract: A mixture comprising a molecule of formula (I); in which A1, A2, A3, A4, A5 and A6, which may be the same or different, are each N or —CH; Y1, Y2, Y3, Y4, Y5 and Y6, which may be the same or different, are each hydrogen or C1 to C12 alkoxy; X1, X2, X3, X4, X5 and X6, which may be the same or different, are each hydrogen, C1 to C12 alkoxy or alkyl C1 to C12; and R7, R8, R9, R10, R11 and R12 are each hydrogen, or each of R7 and R8, R9 and R10 and R11 and R12 may form a bond; and a molecule of formula (II); in which R1, R2, R3, R4, R5 and R6, which may be the same or different, are each alkyl or substituted (and/or chiral) alkyl C1 to C16, acyl C1 to C16, polyethyleneoxy, a flexible connection to a polymer backbone or part of a polymer backbone in homopolymers, copolymers or block copolymers; and B1, B2, B3, B4, B5 and B6a, which may be the same or different, are each, hydrogen, alkyl C1 to C16, alkoxy C1 to C16, nitro, halogeno, cyano, amido, diazo or ester, e.g. alkyl C1 to C16 ester.

Abstract: A mixture comprising a molecule of formula (I); in which A1, A2, A3, A4, A5 and A6, which may be the same or different, are each N or —CH; Y1, Y2, Y3, Y4, Y5 and Y6, which may be the same or different, are each hydrogen or C1 to C12 alkoxy; X1, X2, X3, X4, X5 and X6, which may be the same or different, are each hydrogen, C1 to C12 alkoxy or alkyl C1 to C12; and R7. R8, R9, R10, R11 and R12 are each hydrogen, or each of R7 and R8, R9 and R10 and R11 and R12 may form a bond; and a molecule of formula (II); in which R1, R2, R3, R4, R5 and R6, which may be the same or different, are each alkyl or substituted (and/or chiral) alkyl C1 to C16, acyl C1 to C16, polyethyleneoxy, a flexible connection to a polymer backbone or part of a polymer backbone in homopolymers, copolymers or block copolymers; and B1, B2, B3, B4, B5 and B6a, which may be the same or different, are each, hydrogen, alkyl C1 to C16, alkoxy C1 to C16, nitro, halogeno, cyano, amido, diazo or ester, e.g. alkyl C1 to C16 ester.