Reference

Ink-jet ink compositions with discharge stability

Ink-jet ink compositions with discharge stability. Kobayashi, Yuichi; Mochizuki, Susumu (Pentel Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 2004035597 A2 5 Feb 2004, 9 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C09D011-00. ICS: B41M005-00. APPLICATION: JP 2002-190611 28 Jun 2002. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Title compns. contain pigments and polar org. solvents having b.Several substances with their cas registry numbers 147-14-8 and 84632-65-5 may be metioned in this study.p. of 150-200° and surface tension (TS) of 24-33 mN/m. A compn. contg. Microlith DPP red B-K 5, Vinylite VYHH 2, Bu lactate (b.p. 187°, TS 28.5 mN/m) 50, and other solvents 43 parts showed a viscosity of 14.8 mPa-s and no pptn. after 2 mo at 20°, and was discharged smoothly. .

Solid pigment composition for pigment ink, pigment ink containing the same, and process for preparing these

Solid pigment composition for pigment ink, pigment ink containing the same, and process for preparing these. Nagasawa, Toshiyuki; Ueda, Yoichi (Orient Chemical Industries, Ltd., Japan). PCT Int. Appl. WO 2004011558 A1 5 Feb 2004, 46 pp. DESIGNATED STATES: W: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW; RW: AT, BE, BF, BJ, CF, CG, CH, CI, CM, CY, DE, DK, ES, FI, FR, GA, GB, GR, IE, IT, LU, MC, ML, MR, NE, NL, PT, SE, SN, TD, TG, TR. (English). (World Intellectual Property Organization). CODEN: PIXXD2. CLASS: ICM: C09B067-20. ICS: C09B067-04; C09D011-00; C09D011-16. APPLICATION: WO 2003-JP9423 25 Jul 2003. PRIORITY: JP 2002-218363 26 Jul 2002. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) The present invention provides a process for prepg. a solid pigment compn. for pigment ink comprising the steps of: (a) dissolving poly(vinyl alc.) in water, and dispersing pigments in the resulting soln.; (b) adding aldehyde derivs. to the resulting pigment dispersion and allowing the poly(vinyl alc.) to react with the aldehyde derivs. to prep. polyvinyl acetal; and (c) drying the acetalated pigment dispersion. The pigment ink resulting from the process employs water-sol. solvents (for example, alc. solvent, glycol solvent or other non-toxic solvents), contains sufficient amt. of pigments, has low concn.In this experiment, several chemicals are used like 9002-89-5 and 84632-65-5 with good pigment dispersion and storage stability, and shows good writing or recording ability with improved color development. Examples using polyvinyl butyrals, carbon black, TiO2, or org. pigments were given. .