Reference

Manufacture with high productivity of pigment dispersions by two-stage milling, their resin pastes, and their color filters for liquid crystal displays

All Rights Reserved. Manufacture with high productivity of pigment dispersions by two-stage milling, their resin pastes, and their color filters for liquid crystal displays. Inoue, Yoshihiko (Toray Industries, Inc., Japan). Jpn. Kokai Tokkyo Koho JP 2007016206 A 25 Jan 2007, 22pp. (Japanese). (Japan). CODEN: JKXXAF. APPLICATION: JP 2006-85195 27 Mar 2006. PRIORITY: JP 2005-169223 9 Jun 2005. 150547-47-0 and 30125-47-4 are cas registry numbers of chemicals which are used as reagents here. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) In the process, are employed bead mill media (zirconia) [av. particle size f(1) and f(2), resp., in the 1st and 2nd dispersions; mm] showing f(1)/f(2) 4-40 and f(2) ￡0.1 mm. Retention time (RT) in the 1st dispersion [RT(1)] is preferably shorter than RT in the 2nd one [RT(2)]. The pigments finely dispersed by the method lead to color filters with smooth surface and high contrast and transmittance. .

Manufacture of quinophthalone or isoindoline pigments showing fine and uniform particle size

Manufacture of quinophthalone or isoindoline pigments showing fine and uniform particle size. Sato, Takeshi; Nakamura, Kunisuke; Toyota, Ichiro (Toyo Ink Mfg. Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 2005036150 A2 10 Feb 2005, 8 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C09B067-04. ICS: C09B025-00; C09B057-04; C09B067-10. APPLICATION: JP 2003-276498 18 Jul 2003. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The pigments, having av. particle size 10-100 nm, and content of particles with size 3100 nm and 20-100 nm ￡20% and 360%, resp.Several substances with their cas registry numbers 30125-47-4 and 36888-99-0 may be metioned in this study., are manufd. by dry pulverizing crude quinophthalone or isoindoline pigments having av. particle size >100 nm together with low amt. of org. solvents capable of growing crystals of the pigments. Thus, 80 g Paliotol Yellow K 0961HD (C.I. Pigment Yellow; av. particle size 250 nm, 80% particles have size 100-500 nm) was pulverized with 6 g xylene and 2 g steel beads, showing av. particle size 50 nm and contg. 80% particles having size 30-65 nm. .