Use of graft polymers based on polyalkylene oxides as grayness inhibitors in the wash and aftertreatment of textile material containing synthetic fibers

US4904408A · kind A · utility

Inventors

• Alexander Kud · Eppelsheim, DE
• Wolfgang Trieselt · Ludwigshafen, DE
• Heinrich Hartmann · Schifferstadt, DE

Key dates

• Filing date: Mar 31, 1988
• Grant date: Feb 27, 1990
• Expiry date: Mar 31, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/0036
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A detergent contains as a grayness inhibitor in the wash and aftertreatment of textile material containing synthetic fibers a graft polymer obtainable by grafting PA0 (a) a polyalkylene oxide which has a number average molecular weight of from 300 to 100,000 and is based on ethylene oxide, propylene oxide and/or butylene oxide with PA0 (b) N-vinlypyrrolidone and PA0 (c) a vinyl ester derived from a saturated monocarboxylic acid containing from 1 to 6 carbon atoms and/or a methyl or ethyl ester of acrylic or methacrylic acid in a weight ratio (a):(b):(c) of from 1:0.3:1 to 1:5:30, the order of the addition of (b) and (c) in the graft copolymerization being immaterial and it being possible for up to 1 mole % of the grafted-on monomers (c) to be hydrolyzed.