Process for improving the sun protection factor of cellulosic fibre material

US7425222B2 · kind B2 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Georges Metzger · Mœrnach, FR
• Jean-Jacques Donze · Blodelsheim, FR
• Hans Kramer · Hersbruck, DE
• Serge Hauger · Rixheim, FR
• Volker Papendick · Bad Kötzting, DE
• Michael Milde · Weil am Rhein, DE
• Ted Deisenroth · Brookfield, US
• Rainer Hans Traber · Reinach, CH
• Ullrich Menge · Weil am Rhein, DE
• Hauke Rohwer · Bad Kötzting, DE

Key dates

• Filing date: Feb 11, 2002
• Grant date: Sep 16, 2008
• Expiry date: Jun 30, 2023

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06M2200/25
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

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 (1)in which M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; R1 and R1′ independently of each other are hydrogen, hydroxy, optionally substituted alkyl, 4-morpholinyl, —NH—R3, —N(R3)2 or —O—R3, wherein R3is optionally substituted alkyl or optionally substituted aryl, R2 is a group of formula (2)wherein X is —O— or —NH— and R4 is C1-C4-alkyl which carries at least one hydrophilic substituent and R2′ has the meaning of R1 or R2.