Sizing composition
AssigneeAkzo Nobel N.V.
InventorsErik Lindgren, Sten Frölich, Rein Sikkar
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Abstract
The present invention relates to sizing of paper and more specifically to a substantially water-free and aqueous composition of a sizing agent where the composition contains a cellulose reactive sizing agent, a cationic compound with a molecular weight up to 10000 and a non-ionic compound. Additionally, the invention relates to the preparation and use of above-mentioned compositions.
Claims12
A substantially water-free composition of a cellulose-reactive sizing agent, the cellulose-reactive sizing agent being a ketene dimer sizing agent, said composition further comprising a cationic surfactant having a molecular weight up to about 10,000 selected from primary, secondary, tertiary or quaternary ammonium compounds containing at least one hydrocarbon group with from 9 up to 30 carbon atoms, and a non-ionic compound comprising a polyalkylene oxide moiety and an aliphatic moiety, said composition being essentially free from rosins and derivatives of rosins.
A method for the preparation of an aqueous dispersion of a cellulose-reactive sizing agent characterised in that a substantially water-free sizing composition comprising a cellulose-reactive sizing agent and a cationic compound with a molecular weight of up to 10,000 is emulsified in the presence of an aqueous phase containing a non-ionic compound.
Dependencies are inferred from the claim text.