Method for modifying acid group containing polymers

   
   

Polymers containing acid groups are modified by reaction of (a) polymers which comprise at least 5% by weight of a copolymerized monoethylenically unsaturated monomer containing acid groups, have molar masses of from 200 to 100,000 and are obtainable by free-radical polymerization of monoethylenically unsaturated acids in aqueous solution in the presence or absence of other monoethylenically unsaturated monomers and in the presence of at least 4% by weight, based on the monomers used in the polymerization, of a water-soluble sulfur compound in which the sulfur is in the oxidation state +4, with (b) polyalkylene glycols which are end-capped at one end, alkylpolyalkylene glycol amines or mixtures thereof, or mixtures of at least one of the two compounds specified with up to 30% by weight, based on the mixtures, of ammonia, amines, alcohols, hydroxycarboxylic acids or aminocarboxylic acids at up to 250.degree. C.

Полимеры содержа кисловочные группы доработаны реакцией (a) полимеров состоят из по крайней мере 5% by weight of а copolymerized monoethylenically unsaturated мономер содержа кисловочные группы, имеют молярные массы от 200 к 100.000 и достижимы свободно-radikal6no1 полимерностью monoethylenically unsaturated кислот в водном растворе в присутсвии или отсутствие других monoethylenically unsaturated мономеров и in the presence of по крайней мере 4% весом, основанное на мономерах используемых в полимерности, водорастворимой смеси серы в которой сера находится в положении +4 оксидации, с (b) гликолями polyalkylene которые конц-pokryny на одном конце, alkylpolyalkylene амины гликоля или смеси thereof, или смеси по крайней мере одного 2 смеси определенной с up to 30% весом, основанным на смесях, амиака, аминах, спиртах, оксикарбоновых кислотах или aminocarboxylic кислотах на до 250.degree. Ч.

 
Web www.patentalert.com

< Metal complexes of iminohydroxamic acids

< Process for the application of a protective and decorative laminar structure

> Aqueous dispersion comprising polyurethane-based resins and water-insoluble cellulose ester, methods for preparing and using same, and articles coated with same

> Coating and binding agent for oral or dermal pharmaceutical forms

~ 00160