Reference

Light stable thermoplastic resin compositions

Light stable thermoplastic resin compositions. Lohmeijer, Johannes Hubertus Gabriel Marie (General Electric Co., USA). PCT Int. Appl. WO 8401781 A1 10 May 1984, 14 pp. DESIGNATED STATES: W: AU, BR, JP. (English). (World Intellectual Property Organization). CODEN: PIXXD2. CLASS: IC: C08K005-16; C08K005-41; C08K005-42; C08L071-04. APPLICATION: WO 83-US1668 26 Oct 1983. PRIORITY: NL 82-4181 29 Oct 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Thermoplastic compns. having resistance to light discoloration contain 1 or more dyes capable of bleaching on exposure to light in an amt. which compensates for the color change of the thermoplastic. Thus, a compn. contg. 2,6-xylenol polymer [25134-01-4] 35, rubber modified polystyrene 65, SBR 5, C.I. Solvent Yellow 33 [8003-22-3] 0.025, C.I. Solvent Red 52 [81-39-0] 0.013, Cr oxide green 2.0, Fe oxide brown 0.08, ultramarine blue 0.05, TiO2 1.0, and carbon black 0.019 part was extruded, pelletized, and molded into sheets that, when exposed 300 h to filtered Xe radiation had color change DEab = 2.1 compared with 8.3 for a control contg. no dyes.

Dyeing of synthetic high polymers, especially polyamides, in the manufacturing process

Dyeing of synthetic high polymers, especially polyamides, in the manufacturing process.Some chemicals with cas registry numbers like 81-39-0 and 25489-31-0 are also used. Reber, Lothar; Doerffeldt, Juergen; Schulz, Eberhard; Starke, Guenther (E. Ger. ). Ger. (East) DD 115724 12 Oct 1975,10 pp. (German). (German Democratic Republic). CODEN: GEXXA8. CLASS: IC: D06P001-06. APPLICATION: DD 74-181995 29 Oct 1974. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Reactive azo dyes contg. 1-phenyl-3-methylpyrazolone structures, such as dye I [16893-48-4], were used to dye polyamide and polyester particles in yellow, green, and red shades with good fastness. Thus, 99 parts nylon 6 [25038-54-4] was mixed with 1 part I in 250 parts water, heated for 1 h, treated with a small amt. of AcOH, heated for 1 h, rinsed with water, and dried to give yellow nylon 6 particles. .