Process for the preparation of cationic paper sizing agents
AssigneeAkzona Incorporated
InventorsHeinz Beck, Gerhard Gabriel, Gunter Poppel
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Abstract
A process for the preparation of cationic paper sizing agents is disclosed. A copolymer of maleic anhydride and an .alpha.-olefin containing 10 to 26 carbon atoms is first reacted with from 0.1 to 1.0 mol, per mol of anhydride, of a monoprimary/monotertiary alkylene diamine, subsequently reacting the copolymer with more than 0.2 and less than 1.5 mols, per mol of anhydride, of a low-molecular weight polyamine, with the proviso that the total amount of amine reacted be less than 2.0 mols per mol of anhydride, and converting the resultant product to a salt.
Claims15
A process for preparing cationic paper sizing agents comprising first reacting in an organic solvent a copolymer of maleic anhydride and an .alpha.-olefin containing 10 to 26 carbon atoms, said copolymer having a molar ratio of maleic anhydride to .alpha.-olefin of from 0.9:1 to 1.8:1, with from 0.1 to 1.0 mole per mole of anhydride, of a monoprimary/monotertiary alkylene diamine of the formula, ##STR2## wherein R.sub.1 and R.sub.2 each independently represent alkyl having from 1 to 22 carbon atoms or phenyl, or, when grouped with the tertiary nitrogen atom, represent piperidyl or morpholyl, and x is an integer from 2 to 12;
- subsequently reacting the copolymer-diamine reaction product with more than 0.2 and less than 1.5 moles, per mole of the originally present anhydride, of a low-molecular weight polyamine, said polyamine containing at least two amino groups which are primary, secondary, or a combination thereof, with the proviso that the total amount of amine reacted be less than 2 moles per mole of originally present anhydride;
- and converting the resultant product to a salt.
Dependencies are inferred from the claim text.