Reference

Yellow pigment for polyolefins

Yellow pigment for polyolefins. Momoi, Yasutaka; Yamane, Masateru; Yamaguchi, Isamu (Dainichiseika Color and Chemicals Mfg. Co., Ltd., Japan). Japan. Kokai JP 52005841 17 Jan 1977 Showa, 3 pp. (Japanese). (Japan).Some commonly used reagents like 9002-88-4 and 528-44-9 are used in this experiment. CODEN: JKXXAF. CLASS: IC: C09B057-00. APPLICATION: JP 75-81438 3 Jul 1975. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) A yellow pigment for coloring polyolefins was prepd. by heating an isoindole deriv. (I) [5590-18-1] in an arom. carboxylic acid. Thus, a mixt. of 100 parts .alpha.-type pigment (I) and 10 parts trimellitic acid [528-44-9] was heated 2 h at 300.degree. to give a .beta.-type yellow pigment. A polyethylene [9002-88-4] molding product was colored with the pigment without deforming the dimensions of the molding. .

Conditioning of isoindolinone pigments

Conditioning of isoindolinone pigments. Tanaka, Tsuneo; Ehashi, Shigeyuki; Ohhira, Hiroshi (Toyo Ink Mfg. Co., Ltd., Japan). Japan. Kokai JP 52124022 18 Oct 1977 Showa, 6 pp. (Japanese). (Japan).Several reagents such as 5590-18-1 is used here. CODEN: JKXXAF. CLASS: IC: C09B057-00. APPLICATION: JP 76-40868 13 Apr 1976. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 40 Isoindolinone pigments (sp. surface area 60-150 m2/g) repptd. from H2SO4 were dissolved in an aq. base and acidified to give pigments with improved hiding power. For example, 50 g I [5590-18-1] (sp. surface area 20 m/g) was stirred with 500 g 98% H2SO4, poured into 2 kg iced water, and filtered to give a pigment paste (sp. surface area of dried pigment 75 m2/g) which was dispersed in 500 g water, treated with 150 g 10% aq. NaOH, heated during 1 h to 50-60°, and stirred with 5% HCl to give pigment sp. surface area 40 m2/g) with better hiding power than that before the conditioning, in a melamine-alkyd coating. Polyethylene [9002-88-4] and polypropylene [9003-07-0] films colored with the conditioned pigment showed lower directional shrinkage anomaly than when colored with the unconditioned pigment. .