| http://www.w3.org/ns/prov#value | - The poly-anionic polymers mentioned can be manufactured in a manner which is in itself known, in aqueous solution or suspension, under the action of catalysts, preferably radical-forming catalysts, such as hydrogen peroxide, ammonium persulphate, potassium persulphate or organic peroxides, for example dibenzoyl peroxide, or by using ammonium persulphate and sodium bisulphite.
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