BENZOXAZOLE COMPOUNDS USEFUL AS OPTICAL BRIGHTENING AGENTS

• Main Author: HARNISCH H,DT
• Format: Patent
• Language: English
• Published: 15.01.1974
• Subjects: ADHESIVES; ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DETERGENT COMPOSITIONS; DETERGENTS; DYES; FATTY ACIDS THEREFROM; HETEROCYCLIC COMPOUNDS; LAKES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; ORGANIC CHEMISTRY; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; RECOVERY OF GLYCEROL; RESIN SOAPS; SOAP OR SOAP-MAKING; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF SINGLE SUBSTANCES AS DETERGENTS

1,265,912. Benzoxazoles as optical brighteners. FARBENFABRIKEN BAYER A.G. 6 April, 1970 [5 April, 1969; 25 Oct., 1969], No. 16222/70. Heading C3P. [Also in Divisions C2 and D1] Polymers, e.g. polyvinyl chloride, polyethylene, polypropylene or polystyrene, have incorporporated therein as an optical brightener a benzoxazole compound of general formula in which R1 and R2 are identical or different and stand for H, halogen or alkyl groups, or together stand for the residual members of a cycloaliphatic 5- or 6-membered ring; R3 stands for hydrogen, halogen, an alkyl, cycloalkyl, aralkyl, aryl, carboxylic acid ester, carboxylic acid amide, alkylsulphonyl, arylsulphonyl or aminosulphonyl radical; R4 stands for hydrogen or an alkyl radical; R3 and R4 together may also be the residual members of a cycloaliphatic 5- or 6- membered ring; and R5 stands for an alkyl radical or hydrogen.