Reference

Pigment dispersions with polymeric dispersants having pending chromophore groups

Deroover, Geert; Loccufier, Johan; Groenendaal, Lambertus; Jaunky, Wojciech (Agfa-Gevaert, Belg.). PCT Int. Appl. WO 2007006634 A2 18 Jan 2007, 65pp. DESIGNATED STATES: W: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC; RW: AT, BE, BF, BJ, CF, CG, CH, CI, CM, CY, DE, DK, ES, FI, FR, GA, GB, GR, IE, IS, IT, LU, MC, ML, MR, NE, NL, PT, SE, SN, TD, TG, TR.Chemicals with cas numbers 919284-21-2 and 4531-49-1 also play role. (English). (World Intellectual Property Organization). CODEN: PIXXD2. APPLICATION: WO 2006-EP63482 23 Jun 2006. PRIORITY: EP 2005-106453 14 Jul 2005; US 2005-712501P 30 Aug 2005. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 41 A pigment dispersion comprising 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 wherein the color pigment is selected from the group consisting of monoazo pigments, disazo pigments, b-naphthol pigments, naphthol 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, aluminum pigment lakes, dioxazine pigments, triarylcarbonium pigments and quinophthalone pigments; the at least one pending chromophore group has a mol. wt. which is smaller than 85 % of the mol. wt. 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 arom. group by which the pending chromophore group is linked to the polymeric backbone; and the at least one pending chromophore group has a similarity coeff. A method for prepg. the pigment dispersion wherein the polymeric dispersant is prepd. by copolymg. a monomer already contg. the pending chromophore group is also disclosed. .

Toner for developing electrostatic image

Toner for developing electrostatic image. Kohji, Inaba; Kazunori, Kato; Kengo, Hayase (Canon K. K., Japan). Eur. Pat. Appl. EP 744667 A2 27 Nov 1996, 56 pp. DESIGNATED STATES: R: DE, FR, GB, IT. (English). (European Patent Organization).Some commonly used reagents like 4531-49-1 and 9002-88-4 are used in this experiment. CODEN: EPXXDW. CLASS: ICM: G03G009-087. APPLICATION: EP 1996-108087 21 May 1996. PRIORITY: JP 1995-145201 22 May 1995. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) A toner for developing an electrostatic image includes toner particles constituted by at least a binder resin, a colorant, a polar resin, and a release agent. The polar resin has at least one terminal group which has been modified by a polycarboxylic acid having at least three carboxyl groups. The polar resin has an acid value of 3-35 mgKOH/g. The polar resin may preferably be a polyester resin having an acid value of 4-35 mgKOH/g and having a no.-av. mol. wt. (Mn) of 3000-15,000, a wt/av. mol. wt. (Mw) of 6000-50,000, and a Mw/Mn of 1.2-3.0 based on GPC. The polar resin (preferably polyester resin) having modified by a polycarboxylic acid having at least three carbocylic groups to provide a specific acid value is effective in improving resultant toner performances, such as low-temp. fixability, antioffset characteristic at high temps., triboelec. chargeability, and flowability. .