Abstract: A process is provided for preparing a modified particulate solid comprising reacting a poly vinyl dispersant with a compound in the presence of a particulate solid and a liquid medium, characterised in that: a) the poly vinyl dispersant has a calculated Log P of less than 1.8 and at least one reactable group; and b) the compound is substantially soluble in the liquid medium and has at least one reactive group which is reactive towards the reactable group(s) of the dispersant. The process prepares modified particulate solids which demonstrate good dispersion stability and small particle size.

Abstract: A process for preparing a modified particulate solid comprising reacting a dispersant with a compound in the presence of a particulate solid and a liquid medium, characterised in that: a) the dispersant has at least one reactable group selected from keto, aldehyde and beta-diketoester groups, b) the compound has at least two groups reactive towards said keto, aldehyde and/or beta-diketoester groups. The process provides a modified particulate solid having improved stability which is particularly useful for liquid vehicles having and range of polarities and for incorporation into ink jet printing inks.

Abstract: An aqueous coating composition comprising a crosslinkable water-dispersible vinyl oligomer(s) wherein said composition when drying to form a coating has an open time of at least 20 minutes, a wet edge time of at least 10 minutes, a tack free time of ?20 hours and an equilibrium viscosity of ?5,000 Pa·s at any solids content when drying in the range of from 20 to 55 wt % using any shear rate in the range of from 9±0.5 to 90±5 s?1 and at 23±2° C.

Abstract: A process for forming a chain extended thermoplastic polymer which includes reacting: (i) a prepolymer having one or more guanidinium or biguanidinium units and having at least one reactive end group; and (ii) a chain extender having at least two groups able to react with reactive end group(s) in (i). The polymer used as fixing agent to reduce highlighter smear of prints prepared by ink jet printing.

Abstract: A coating composition comprising pigment, medium and a binder characterised in that (i) the binder comprises a cationic polymer comprising a repeat unit of Formula (1): wherein: X and Y are the same or different and represent divalent organic linking groups; and (ii) the weight ratio of pigment to binder in the composition is at least 2:1. The compositions are useful for preparing ink jet recording materials with good water resistance, print quality and dry time.

Abstract: An ink-jet printing process comprising the steps (a) and (b) in any order or simultaneously: (a) applying an ink to a substrate by means of an ink-jet printer to form an image on a substrate; and (b) applying to the substrate a fixing composition comprising a liquid medium and a polymer containing a plurality of monoguanide and/or biguanide groups by means of an ink jet printer; characterised in that in the fixing composition has a chloride concentration less than 400 ppm by weight.

Abstract: An ink-jet printing process including the steps (a) and (b) in any order or simultaneously: (a) applying an ink to a substrate by means of an ink-jet printer in a localized manner to form an image on the substrate; and (b) applying to the substrate a composition including a liquid medium and a poly(C3-18-hydrocarbyl monoguanidine) or a salt thereof by means of an ink-jet printer. also a substrate printed by means of this process, compositions including poly(C3-18-hydrocarbyl monoguanidines), sets of liquids for use in ink-jet printing and ink-jet printer cartridges. The process avoids the need for expensive special papers previously used for ink jet printing.

Abstract: A substrate for ink-jet printing which is coated or impregnated with a water dissipatable nitrile polymer having a Mn of less than 25,000 comprising 5 to 70% w/w of nitrile monomers. Also processes for ink-jet printing and printed substrates.

Abstract: A process for forming a chain extended thermoplastic polymer which comprises reacting: (i) a prepolymer comprising one or more guanidinium or biguanidinium units and having at least one reactive end group; and (ii) a chain extender having at least two groups able to react with reactive end group(s) in (i). The polymers may be used as fixing agents to reduce highlighter smear of prints prepared by ink jet printing.

Abstract: A coating composition comprising pigment, medium and a binder characterised in that (i) the binder comprises a cationic polymer comprising a repeat unit of Formula (1): 1

Abstract: A ink-jet printing process comprising the steps (a) and (b) in any order or simultaneously: (a) applying an ink by means of an ink printer to a localised region of substrate to form an image on the substrate; and (b) applying a fixing composition comprising a liquid medium and a polymeric biguanide comprising a repeat unit of Formula (1) or a salt thereof by means of an ink jet printer to localised region of the substrate: wherein: X and Y are the same or different and represent divalent organic linking groups; and characterised in that the localised regions reffered to in steps (a) and (b) are substiantially coextensive.

Abstract: A composition comprising the components: (a) a hydrophilic polymer having a number average molecular weight less than 30,000; (b) a hydrophobic polymer having a number average molecular weight more than 40,000; (c) pigment; and (d) liquid medium, and use of the composition in ink-jet printing.

Abstract: A coating composition comprising pigment, medium and binder comprising a poly(C3-18-hydrocarbyl mono guanidine) and characterised in that the weight ratio of pigment to binder in the composition is at least 2:1. Also a recording material comprising this composition, a process for forming the recording material, and an ink-jet printing process utilizing the recording material.

Abstract: An ink-jet printing process comprising the steps (a) and (b) in any order or simultaneously:

Abstract: An aqueous coating composition comprising a crosslinkable water-dispersible vinyl oligomer(s) wherein said composition when drying to form a coating has an open time of at least 20 minutes, a wet edge time of at least 10 minutes, a tack free time of ≦20 hours and an equilibrium viscosity of ≦5,000 Pa.s at any solids content when drying in the range of from 20 to 55 wt % using any shear rate in the range of from 9±0.5 to 90±5 s−1 and at 23±2° C.

Abstract: Bulk-modified potting composition based on a curable epoxy resin or on a mixture of these resins, where the resin or the mixture is composed of an epoxy resin, a hardener, where appropriate an accelerator, and also other additives, such as fillers, flexibilizers, and colorants, which potting composition (a) comprises a three-dimensionally crosslinked polysiloxane in disperse form and with a particle size in the range from 0.02 &mgr;m to 50 &mgr;m, which, where appropriate, has reactive groups which can react chemically with the epoxy resin and/or the hardener, (b) a selected linear or branched siloxane compound which has reactive groups which can react chemically with the epoxy resin and/or the hardener, and also, where appropriate, (c) a low-molecular-weight oligomeric siloxane compound, the use of the potting composition as an engineering material or as an insulating material, and the moldings and insulation produced therefrom.

Abstract: Basic and acid dispersants derived from branched alkyl aliphatic acids and alcohols and one or more hydroxy carboxylic acid or lactone to give a polyoxyalkylenecarbonyl chain (POAC) having a terminal carboxylic acid group (TPOAC acid) or terminal hydroxy group (TPOAC alcohol). Preferred basic dispersants are obtained by reaching one or more TPOAC acids with a polyamine or polyimine such as polyethyleneimine and preferred anionic dispersants are prepared by forming a phosphate ester of a TPOAC alcohol.

Abstract: A substrate for ink-jet printing which is coated or impregnated with a water dissipatable nitrile polymer having a Mn of less than 25,000 comprising 5 to 70% w/w of nitrile monomers. Also processes for ink-jet printing and printed substrates.

Abstract: An ink-jet printing process comprising the steps (a) and (b) in any order or simultaneously: (a) applying by means of an ink jet printer an ink to a substrate in a localised manner to form an image on the substrate; and (b) applying to the substrate a composition comprising a binder and a polymeric biguanide which has a repeat unit of Formula (1) or a salt thereof: wherein X and Y are the same or different and represent divalent organic linking groups.