cationic polyacrylamide drainage aid paper industry in britain

cationic polyacrylamide drainage aid paper industry in britain
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  • What is a non ionic polyacrylamide?
  • Polyacrylamides [8-11] are widely used as retention aids in the paper industry. Non-ionic polyacrylamides (structure I) are homopolymers produced from acrylamide with the aid of a free-radical initiator.
  • Which polyamine is used as a retention aid in the paper industry?
  • The polyamines employed as retention aids in the paper industry are usually polycondensation products of amines and short-chain crosslinking agents, which normally contain chlorine. The simplest represen tatives of this group of substances are the condensation products of ethyl enediamine and dichloroethane .
  • What is a retention aid based on polyacrylamide?
  • Nowadays, most retention aids based on polyacrylamides are supplied as solids or in the form of water-in-oil emulsions. Solid products are manufactured by polymerising the monomers in water or in the aqueous phase of a water-in-oil (W /0) emulsion of an immiscible organic solvent.
  • Can polyamines be used as a retention aid?
  • Products with a molar mass high enough to permit their use as retention aids are supplied commercially in the form of 20-40% solutions. Like polyethylenimines, polyamines can be combined with other water-soluble polymers to boost their effectiveness.