摘要:
The invention relates to a solid pigment preparation comprising at least 35% by weight of one or more pigments and at most 65% by weight of a dispersant resin, wherein the dispersant resin comprises a polyester backbone having at least one pendent hydrophilic polyalkylene oxide monoalkylether group, the dispersant resin comprising 30 to 80% by weight of alkylene oxide units and having a number average molecular weight of 1,000 to 150,000.
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 group. 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.
摘要:
The invention relates to a solid pigment preparation comprising a pigment and a dispersant resin, wherein the composition comprises at least 35% by weight of at least one pigment and at most 65% by weight of dispersant resin, calculated on the combined weight of pigment and dispersant resin, wherein the dispersant resin comprises a polymer backbone produced by chain-reaction polymerization having pendent hydrophilic polyalkylene oxide side groups, and wherein the pigment particles within the preparation have average particle sizes in the range of 50 nm to 5,000 nm.
摘要:
This invention refers to a novel process for the synthesis of polyethylene imine (PEI)-based pigment dispersants characterized by a “grafting from” approach, allowing the manufacture of solvent based dispersant systems. The polyethylene imine (PEI)-based pigment dispersant can be presented by the formula (I) X-(T)m-P-(T)n-H wherein P is a polyethyleneimine (PEI) back-bone; T is a residue —CO-A-O— wherein A is C2-C12 alkylene optionally substituted with C1-C6 alkyl with the proviso that each linkage between P and T is an amide bond and each linkage between X and T is an ester bond, X is a modifier or terminator residue R—CO— wherein R is a linear or branched, saturated or unsaturated alkanecarboxylic acids having from 1 to 22 carbon atoms or an unsaturated fatty acid residue or a hydroxycarboxylic residue or a polyester residue obtained from polycondensation of hydroxycarboxylic acids, or an acid terminated polyether, n, m independently are a number from 1 to 100.
摘要:
This invention relates a copolymer (D) containing (A) methacrylic polymer units each having, at an end thereof, at least one group represented by the below-described formula (1) and (B) units of an aromatic vinyl monomer, wherein a weight ratio (A:B) of the units (A) to the units (B) is A:B=5 to 95:95 to 5; and its use. The present invention can provide inter alia a copolymer useful as a pigment dispersant or the like capable of affording pigment dispersions useful for inkjet inks, colors for color filters, and other applications.
摘要:
The present invention is a process for producing a linear block copolymer, useful as a dispersant for pigment, wherein the block copolymer comprises acetoacetyl amine functional groups which serve as pigment anchoring groups. The acetoacetyl amine functional groups can be formed by reacting hydroxyl functional groups with an acetoacetate agent and then reacting the resulted acetoacetate functional groups with a primary amine. The linear block copolymer can be an AB, ABC, or ABA block copolymer. The linear block copolymer produced by the present invention can be useful in dispersing and stabilizing a wide range of pigments in solvent based systems, and are particularly useful in providing pigment dispersions that are used in coating compositions for automobiles and trucks, where they provide improved efficiency of pigment use, lower paint viscosity, and reduced emission of volatile organic solvent.
摘要:
A pigment solution that an organic pigment is dissolved in a solvent, a poor solvent which decreases solubility of the organic pigment in the pigment solution to precipitate particles of the organic pigment, and a dispersant solution containing a dispersant in an organic solvent which acts as a good solvent to the organic pigment are merged in one merging region via each separate inlet flow channel and flowed out from the merging region through one single mixing flow channel, thereby producing particulates by directly dispersing particles precipitated in an aqueous medium comprising the pigment solution and poor solvent into an organic solvent medium containing the dispersant.
摘要:
The present invention relates to a colorant, a color filter, LCD device, a composition and a method for preparing the same. The colorant covers pigment particles by using the acrylic acid polymer having an acid value greater than 20 mgKOH/g and containing aromatic group so as to greatly improve the stability while improving the dispersion ability of the pigment particles. By the above colorant, the photosensitive resin composition ensures that the developing performance is basically not influenced so that the photosensitive resin composition can meet the need of high transmissivity, high color purity, and high contrast for a color filter. A pattern on the color filter is formed by using the photosensitive resin composition having high dispersion stability and developing performance so as to greatly improve transmissivity, color purity, and contrast. An LCD device uses the color filter with high transmissivity, high color purity, and high contrast so as to greatly improve the display effect of color images.
摘要:
Various modified pigment products are described which are preferably capable of being dispersed in a variety of materials such as coatings, inks, toners, films, plastics, polymers, elastomers, and the like. The modified pigments are pigments having attached groups, such as polymeric groups, onto the pigment by means other than adsorption. A modified pigment product is described comprising a pigment having attached at least one group comprising the formula: —X-[NIon]pR wherein X comprises an aromatic group or an alkyl group, NIon comprises at least one type of non-ionic group, R represents hydrogen or comprises an aromatic group or an alkyl group, and p represents an integer of from 1 to 500. Modified pigment products are also described comprising a pigment having attached at least one alkylene oxide group or at least one polymeric group. In addition, other types of modified pigment products are described as well as their incorporation into inks, coatings, toners, films, plastics, polymers, elastomers, and the like. Methods of making the modified pigment products are also described.
摘要:
A non-aqueous pigment dispersion includes a diketopyrrolo-pyrrole pigment, a polymeric dispersant, and a dispersion synergist in a dispersion medium wherein the dispersion synergist is a quinacridone derivative containing at least one acid group or a salt thereof.