Patent ID: 7407519
Filing Date: 2008-08-05
Classification: C07D,C11D,D06M

Abstract:
1. A process for improving the sun protection factor (SPF) of cellulosic fibre materials and blends thereof, which comprises contacting said materials with at least one compound of the formula in which M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; R R additionally contacting said materials with at least one UV absorber selected from the group consisting of o-hydroxybenzophenone, o-hydroxyphenylbenzotriazole, 2-aryl-2H-benzotriazole, salicylic acid ester, substituted acrylonitrile, substituted acrylaminoethylene, nitrilohydrazone, o-hydroxyaryl-1,3,5-triazine, sulphonated 1,3,5-triazine and oxalic anilide UV absorbers and where the SPF achieved is between 16.0 and 24.2.