Process for the production of water-soluble hydrolyzed products of polyacrylonitrile polymers
AssigneeWolff Walsrode AG
InventorsHelmut Huhn, Werner Karstens, Lutz Hoppe
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Abstract
A process for the production of water-soluble hydrolyzed polyacrylonitrile polymers, wherein the acrylonitrile is polymerized in the presence of 1-8% by weight of hydrolyzed polyacrylonitrile and hydrolyzed without intermediate isolation from the reaction mixture.
Claims8
A process for the production of a watersoluble hydrolysis product of an acrylonitrile homopolymer and/or copolymer which comprises polymerising acrylonitrile and, optionally, other monomers, in aqueous media, at a temperature of from 35.degree. C. to 80.degree. C. in the presence of from 1 to 8% by weight, based on the monomer to be polymerised of a hydrolysed acrylonitrile homopolymer and/or copolymer having an intrinsic viscisity [.eta.] of from 0.8 to 2.5 dl/g as protective colloid and hydrolysing the resulting polymer.
Dependencies are inferred from the claim text.